Korea’s Petrochemical Core Business Is Still Naphtha and Commodities—The Real Battleground Is What It Still Can’t Make
Korea’s petrochemical industry is well versed in NCC, BTX, PE, and PP, but it still hasn’t crossed the hill that changes the quality of earnings.
On the ground, the picture is straightforward. Korean companies are comfortable with the process line of cracking naphtha to make ethylene, separating and purifying olefins, and then turning them into PE and PP. There’s a reason the same names keep coming up: LG Chem, Lotte Chemical, Yeochun NCC, and Korea Petrochemical. On the refining side as well, SK Innovation, GS Caltex, S-OIL, and HD Hyundai Oilbank have built up strong operating know-how in RFCC and other upgrading facilities. But if it ends there, it ultimately becomes a commodity volume game. The fact that BASF has continued to hold the top spot, and that Sinopec rose alongside it from 2020 to 2024, is no coincidence. It means this is a market won by countries that can produce at scale and by companies that can sell across a broad footprint.
From Naphtha to Plastics: Where Korea Makes Good Money—and Where It Doesn’t
This industry generates cash through volume in feedstocks, basic petrochemicals, and commodity resins, but further down the chain, margins are increasingly determined by technology and portfolio mix.
It starts with feedstocks and refining. The foundation has to be solid at the refining and upgrading stage (RFCC), and then in basic petrochemicals, NCC forms the backbone of the ethylene chain. That’s where names like Yeochun NCC, Korea Petrochemical Ind. Co., and Lotte Chemical are firmly entrenched. Move into intermediates and derivatives, and aromatics (BTX) plus olefin separation and purification become a battle of yields and operations. Finally, in synthetic resins and polymers, PE and PP carry the volume. The problem comes after that. As you move into fine chemicals/specialties and end products/applications, customer lock-in and materials design matter more than simple capacity expansion—but compared with its familiarity and strength upstream, Korea’s presence further downstream is much weaker. A lot of money moves through the system, but less of it sticks as high-quality profit. That’s the core point.
| Stage | Description | Sub-sectors |
|---|---|---|
| Feedstocks/Refining | Crude refining and basic feedstock production (including SAF and bio-naphtha) | Crude refining, naphtha production, LPG, condensate, lube base oil, asphalt/fuel oil, etc. |
| Basic Petrochemicals | Production of basic chemicals through NCC and MTO | Ethylene, propylene, butadiene, BTX, C4 cuts, syngas/methanol, etc. |
| Intermediates/Derivatives | Intermediate chemicals processed from basic petrochemicals (including recycled PTA and bio-based monomers) | SM/EO/PO, MEG/PG, TPA/PTA (including recycled), AN/MMA, phenol/acetone, caprolactam, etc. |
| Synthetic Resins/Polymers | Plastic feedstocks (including bioplastics and biodegradable plastics) | PE (polyethylene), PP (polypropylene), PVC, PS/EPS/ABS, PET/engineering plastics, bio/biodegradable plastics (PLA, PHA), etc. |
| Fine Chemicals/Specialties | High-value fine chemicals and specialties (with expansion into semiconductor and secondary battery materials) | Additives/plasticizers, surfactants, paints/coatings, adhesives/sealants, semiconductor electronic materials, secondary battery materials (electrolytes/binders/separator coatings), etc. |
| End Products/Applications | Finished consumer and industrial products (battery/EV, aerospace, recycled packaging) | Film/sheet, fiber/yarn, injection molding/forming, foams/insulation materials, tires/rubber products, secondary battery cells/packs, etc. |
What We’re Good At Is Process Execution. What We’re Weak At Is Platforms.
A look at Korea’s technology map shows clear strengths in process operations, separation, and commodity resins, while C1, catalysts, CCUS, and electronic materials remain underdeveloped.
This is a pretty uncomfortable truth. When people talk about localization, it’s easy for everyone to applaud, but the actual table makes it obvious where the real strengths are. NCC, aromatics (BTX), olefin separation and purification, and PE/PP show only narrow gaps. That’s where names like LG Chem, Lotte Chemical, Yeochun NCC, Korea Petrochemical Ind. Co., Hanwha TotalEnergies, S-OIL, and GS Caltex appear. By contrast, methanol and C1 chemistry, semiconductor and display materials, CCUS, and high-efficiency catalysts show wide gaps. This is not just about one or two products. It means Korea still hasn’t fully made the language of the next growth engine its own.
The strength of Korea’s petrochemical industry is its ability to run big systems at scale; its weakness is the foundational technology needed to change the system itself.
Put kindly, Korea is strong at operational optimization. Put bluntly, it is still better at excelling within a game someone else designed. Korea knows NCC, BTX, and PE/PP well. It is good at running plants stably, reducing losses in separation and purification, and pushing out large volumes of commodity products. But what happens when methanol and C1 chemistry are weak, high-efficiency catalysts are weak, and CCUS is weak? The range of options narrows when it comes to feedstock switching and responding to carbon regulation. The large gap in semiconductor and display materials hurts too. It means the ladder up to specialties is not exactly smooth. Refining and upgrading facilities (RFCC) appear both on the strength list and on the vulnerability list with a gap of 1. The right reading here is that Korea has strong on-site operating capability, but the depth of technological self-reliance is not yet at a level where anyone should feel fully comfortable. We should not describe this vaguely as “pretty good.” The areas of strength are clear, and the empty spaces are just as clear.
Table below: Domestic and global TRL (Technology Readiness Level 1–9) by technology, and key companies
| Technology | Domestic | Global | Assessment | Key Companies | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic Petrochemicals & Refining | ||||||||||||||||||||||||||||||||
| NCC (naphtha cracking) | 9 | 9 | Strong · Gap 0 | LG Chem, Lotte Chemical, Yeochun NCC, Korea Petrochemical Ind. Co. | ||||||||||||||||||||||||||||
| NCC (Naphtha Cracking Center) is the “heart of petrochemicals”: it heats naphtha extracted from crude oil to temperatures above 800°C and cracks it into ethylene and propylene, the basic feedstocks for plastics. It is a bit like boiling oil on a gas stove until it breaks into smaller pieces. In principle, the process shakes long hydrocarbon chains at high temperature (thermal cracking), breaking carbon-carbon (C-C) bonds and rearranging them into shorter, highly reactive molecules such as ethylene and propylene—olefins. The cracked gas is then immediately cooled and compressed to temperatures well below zero and separated into ethylene, propylene, BTX, C4, and other streams. As of 2025–2026, China’s large-scale ethylene capacity additions have pushed the global market into oversupply, and Korea’s commodity NCC sector has entered a restructuring phase, with lower operating rates and consolidation of aging facilities. The key question is how quickly the industry can shift its center of gravity toward higher-value and greener feedstocks. | ||||||||||||||||||||||||||||||||
| Refining & upgrading facilities (RFCC) | 8 | 9 | Strong · Gap 1 | SK Innovation, GS Caltex, S-OIL, HD Hyundai Oilbank | ||||||||||||||||||||||||||||
| Refining is the process of separating crude oil into gasoline, diesel, fuel oil, and other products based on boiling point differences. RFCC (Residue Fluid Catalytic Cracking) is an upgrading unit that takes cheap heavy oil residues and cracks them again with catalysts into higher-value products such as gasoline and propylene—essentially squeezing more value out of the barrel one more time. In other words, it extracts more expensive products from the same crude. The principle is to mix heavy oil with fine powdered catalyst and crack large molecules almost instantly at around 500°C, then burn off the carbon deposits (coke) that build up on the catalyst, regenerate it, and circulate it again. More recently, as fuel demand stagnates, a strategy has emerged to connect RFCC and other upgrading units directly with petrochemicals through COTC (Crude-to-Chemicals), maximizing direct chemical feedstock output from crude oil. S-OIL’s Shaheen project is a representative example of this kind of large-scale refining-petrochemical integration investment. | ||||||||||||||||||||||||||||||||
| Aromatics (BTX) | 8 | 8 | Strong · Gap 0 | Lotte Chemical, Hanwha TotalEnergies, S-OIL, GS Caltex | ||||||||||||||||||||||||||||
| BTX refers to the three ring-shaped aromatic molecules benzene, toluene, and xylene, produced either by catalytic reforming of naphtha or recovered from NCC byproducts. The benzene ring is stable yet highly versatile as a starting point for many chemical reactions, which is why these are called “aromatics.” Among them, paraxylene (PX) is oxidized into PTA, which then becomes a core raw material for polyester fiber used in clothing and PET bottles. In other words, BTX is the starting point for both the clothes we wear and the water bottles we drink from. In 2025–2026, China is rapidly expanding self-sufficiency in PX and benzene, putting pressure on Korean export volumes and margins, which is making differentiation—such as high-purity and electronic-grade benzene derivatives—a more urgent task. | ||||||||||||||||||||||||||||||||
| Olefin separation & purification | 8 | 9 | Strong · Gap 1 | Yeochun NCC, Korea Petrochemical Ind. Co., Lotte Chemical | ||||||||||||||||||||||||||||
| This is the stage where pure ethylene and propylene are isolated from the mixed gas cracked in an NCC. Because the gases have very similar boiling points, they must be deeply cooled to below -100°C and then separated through dozens of distillation columns using tiny differences in boiling point (cryogenic separation and distillation). It is a huge refrigeration and distillation process that consumes enormous amounts of electricity and cooling energy, accounting for a large share of total NCC energy use. Think of it as sorting mixed colored pencils one by one even though they all weigh almost the same—a highly precise but energy-intensive job. Recently, active research has focused on reducing energy use through heat integration, high-efficiency membranes, and adsorption, which ties directly to carbon emissions reduction. | ||||||||||||||||||||||||||||||||
| Methanol & C1 chemistry | 6 | 8 | Catching up · Gap 2 | Lotte Chemical, Hanwha Solutions, SK Innovation | ||||||||||||||||||||||||||||
| C1 chemistry refers to technologies that make chemical products starting from one-carbon molecules such as methane, methanol, and carbon monoxide. Methanol, in particular, is produced from natural gas or coal via syngas (CO+H2), and can then be converted into ethylene and propylene through MTO (Methanol-to-Olefins), creating a “detour” that bypasses naphtha. Put simply, it is a shortcut from gas directly to plastic feedstocks. More recently, “green (e-)methanol” made from captured CO2 and green hydrogen has gained attention as a carbon-neutral fuel and feedstock, and is also emerging as a marine fuel. Korea is still in catch-up mode versus China and other overseas players in core MTO and synthesis technologies, making feedstock diversification through green methanol demonstration projects a key challenge. | ||||||||||||||||||||||||||||||||
| Synthetic Resins & Polymers | ||||||||||||||||||||||||||||||||
| PE · PP (commodity synthetic resins) | 9 | 9 | Strong · Gap 0 | LG Chem, Lotte Chemical, Hanwha TotalEnergies, Korea Petrochemical Ind. Co. | ||||||||||||||||||||||||||||
| PE (polyethylene) and PP (polypropylene) are the most common plastics, made by linking ethylene and propylene molecules (monomers) into long chains using catalysts—a process called polymerization. Plastic bags, plastic containers, and car bumpers are mostly made from these materials. You can think of it as stringing tiny beads into long threads and turning them into a solid. Even within PE, changing the catalyst and process conditions alters hardness, transparency, and heat resistance, creating hundreds of grades for uses ranging from food packaging to pipes and wire coatings. As of 2025–2026, China is meeting its own demand and exporting surplus volumes, leaving commodity PE and PP in chronic oversupply. As a result, Korean producers are moving quickly toward higher-value, higher-performance grades made with metallocene catalysts and similar technologies, such as POE and high-transparency, high-strength products. | ||||||||||||||||||||||||||||||||
| Engineering plastics | 7 | 8 | Strong · Gap 1 | LG Chem, Kolon Plastics, Lotte Chemical | ||||||||||||||||||||||||||||
| These are high-performance plastics strong enough to replace metal, with resistance to heat, impact, and chemicals. Examples include POM, PA (nylon), PC, and PBT, used in places that need to be both strong and light, such as automotive parts, electronics housings, and EV battery packs. If ordinary plastic is a “paper cup,” this is closer to a “tempered glass cup” in durability. The principle is to design molecular chains with rigid ring structures or reinforcing fibers such as glass fiber so they do not bend or melt easily, and then fine-tune the properties through compounding. As EVs and vehicle electrification increase demand for lightweight, highly insulating parts, this has become a fast-growing, higher-value area where petrochemical companies are building compounding capabilities. | ||||||||||||||||||||||||||||||||
| ABS & synthetic rubber | 9 | 9 | Strong · Gap 0 | LG Chem, Kumho Petrochemical, Lotte Chemical | ||||||||||||||||||||||||||||
| ABS is a tough plastic made by combining acrylonitrile, butadiene, and styrene. It is easy to process and paint, which is why it is used in home appliances, toys, and automotive interior and exterior parts. Synthetic rubber is man-made rubber produced by polymerizing butadiene and similar materials, and is used in tires, shoes, and gloves. Kumho Petrochemical’s NB latex (nitrile butadiene latex), in particular, is a key material for medical and hygiene rubber gloves and helped support global glove demand during the COVID period. Put simply, ABS is a “hard all-purpose plastic,” while synthetic rubber is “customizable artificial rubber.” Korea remains among the global leaders in market share for both products thanks to decades of technological accumulation and large-scale facilities. | ||||||||||||||||||||||||||||||||
| Super absorbent polymer (SAP) | 8 | 8 | Strong · Gap 0 | LG Chem, Hanwha Solutions | ||||||||||||||||||||||||||||
| This is a special plastic that can absorb hundreds of times its own weight in water and trap it like a gel. The absorbent layer in baby diapers and adult hygiene products is exactly this material—a seemingly magical substance where a handful of small granules can soak up an entire cup of water. The principle is that lightly crosslinking the molecular chains into a mesh allows water to be drawn in between the chains, where it swells but cannot easily escape again due to osmotic pressure and the network structure. Fine differences in properties such as absorption speed, retention, and rewet prevention are what determine product quality. It is a steadily growing segment as demand for adult hygiene products rises with population aging, and Korean companies are among the world’s top suppliers. | ||||||||||||||||||||||||||||||||
| Precision & Electronic Materials | ||||||||||||||||||||||||||||||||
| Secondary battery cathode materials | 8 | 8 | Strong · Gap 0 | EcoPro BM, POSCO Future M, L&F, LG Chem | ||||||||||||||||||||||||||||
| Cathode material is the “positive electrode” powder in a battery that releases and receives lithium ions, and it is the most expensive material determining battery capacity and driving range. It consists of oxide crystals combining lithium with metals such as nickel, cobalt, manganese, and aluminum, serving as a “lithium warehouse” that releases lithium during charging and takes it back during discharge. The higher the nickel content in high-nickel cathodes, the more energy they can store and the farther a vehicle can go—but the crystal structure also becomes less stable and harder to manufacture. Korea is ahead in high-nickel technologies with nickel content in the 80–90% range, as well as in single-crystal technology. That said, in 2025–2026 the cathode market is going through an adjustment as EV demand growth slows and low-cost Chinese LFP rises, pushing the industry to look for new openings in next-generation technologies such as high-voltage mid-nickel and dry-process manufacturing. | ||||||||||||||||||||||||||||||||
| Electrolytes & additives | 7 | 7 | Strong · Gap 0 | Enchem, Soulbrain, Dongwha Electrolyte | ||||||||||||||||||||||||||||
| Electrolyte is the liquid inside a battery that serves as the “ion highway,” allowing lithium ions to move between the positive and negative electrodes. It is made by dissolving lithium salts such as LiPF6 in an organic solvent, allowing ions to pass while blocking electrons to prevent short circuits. Additives, even at just 1–2%, form a protective SEI layer on the electrode surface and determine battery life, safety, low-temperature performance, and charging speed. The formulation and synthesis of these additives is the most demanding know-how in the field. If the electrolyte is the road, the additives are the coating laid on top of it, determining how long and how safely the cars—the ions—can travel. Korean companies have rapidly expanded their share in electrolyte production, but core source technologies for lithium salts and high-value functional additives still remain catch-up areas dependent on Japan and China. | ||||||||||||||||||||||||||||||||
| Semiconductor & display materials | 6 | 8 | Catching up · Gap 2 | SKC, Dongjin Semichem, Kolon Industries, SK Materials | ||||||||||||||||||||||||||||
| These are ultra-high-purity chemical materials used in semiconductor and display manufacturing. They include photoresists (PR), etchants and cleaning solutions, display films, and OLED emissive/common-layer materials, where purity is so critical that impurities must be controlled at the parts-per-billion (ppb) level. Photoresist, for example, is a “light-reactive ink” whose chemical structure changes when exposed to light, allowing circuit patterns to be etched—it is the starting point for drawing fine circuits. The difference in precision and cleanliness is like the difference between over-the-counter medicine and injectable pharmaceuticals, even if both are “chemicals.” After Japan’s 2019 export controls, Korea succeeded in localizing some materials such as hydrogen fluoride, but cutting-edge electronic-grade materials such as EUV photoresists still remain heavily dependent on Japan, leaving localization as a strategic task. | ||||||||||||||||||||||||||||||||
| Copper foil & separators | 7 | 8 | Strong · Gap 1 | SKC (SK Nexilis), Lotte Energy Materials, SK IE Technology | ||||||||||||||||||||||||||||
| Copper foil is an ultra-thin copper film—just 4–6 micrometers thick, thinner than a human hair—that collects current at the battery’s negative electrode. A separator is a thin plastic film full of microscopic pores that prevents the positive and negative electrodes from touching directly and causing fires. Copper foil is made by electroplating copper into a thin layer (electrolytic copper foil), while separators are made by stretching polyethylene film to create micropores and coating it with ceramic for heat resistance. Both must be extremely thin without tearing, so the key is a precision process that spreads them as thin as paper while keeping them as tough as steel. The thinner they are, the more active material can fit into the same volume, raising energy density and driving range. Korea is strong in ultra-thin, high-strength products, but price competition is intensifying under pressure from China’s large-scale low-cost supply. | ||||||||||||||||||||||||||||||||
| Green & Circular | ||||||||||||||||||||||||||||||||
| Chemical recycling | 5 | 6 | Strong · Gap 1 | SK Geo Centric, LG Chem, Lotte Chemical | ||||||||||||||||||||||||||||
| This is the technology of melting waste plastics back down (depolymerization) or breaking them apart at high temperature without oxygen (pyrolysis) to return them to the oil or monomer stage. Even plastics that are mixed in color or contaminated and therefore hard to recycle can be “reduced back to original oil” (pyrolysis oil) and infinitely regenerated into new plastic, making this fundamentally different from conventional mechanical recycling, where plastics are simply shredded and reused at lower quality. Put another way, mechanical recycling is like cutting up old clothes and using them as rags, while chemical recycling is like turning them back into thread and weaving new clothes. Pyrolysis oil can be fed back into NCC units, and PET can be depolymerized all the way to monomers and regenerated into food-grade material. Korean companies are still in the early commercialization stage, building and demonstrating large commercial plants in places such as Ulsan. | ||||||||||||||||||||||||||||||||
| Bioplastics | 5 | 6 | Strong · Gap 1 | LG Chem, CJ CheilJedang, SKC | ||||||||||||||||||||||||||||
| These are plastics made from plants such as corn and sugarcane, or through microbial fermentation, instead of petroleum. Some are biodegradable products—such as PLA (a polymer of lactic acid made by fermenting plant sugars) and PHA (a natural polyester accumulated by microorganisms)—that break down by microbial action when buried in soil or exposed to the marine environment and return to nature. It is a shift in thinking: replacing petroleum-derived feedstocks with crops and microbes, offering two advantages at once—lower carbon footprints during production and better decomposition at disposal. In Korea, CJ CheilJedang has built capabilities in fermentation-based PHA, while LG Chem has been developing biodegradable materials such as PLH. That said, these materials are still more expensive than petroleum-based plastics and often weaker in properties such as heat resistance and strength, so commercialization remains at an early stage and limited to uses like straws and packaging. | ||||||||||||||||||||||||||||||||
| CCUS (carbon capture & utilization) | 4 |
Why BASF Hasn’t Fallen, and Why Sinopec Has RisenFrom the 1990s to today, the changing No. 1 spot shows that petrochemicals is ultimately a game not just of scale, but of portfolio strategy and national industrial policy. The fact that BASF has remained at the top globally is symbolic. From 2020 to 2024, Sinopec also moved to the forefront, and that trend continues from 2025 to the present. Korea is simpler. From the 1990s to 2008, LG Chem and Lotte Chemical were both in the conversation, and from 2009 to today, LG Chem has consistently held the No. 1 spot. More important than the numbers is that consistency. This is not about who had one great run, but about who endured through a long cycle.
Korea’s current position is this: LG Chem’s consistency deserves recognition, but the card that could shake up global dominance is still not clearly visible beyond commodity chemicals. So why has BASF endured? Commodity chemicals alone do not explain it. It means the company has a broad portfolio and enough layers of resilience to hold up even when the cycle turns. Sinopec’s rise is different again. It is backed by a massive domestic market and command over the supply chain. Korea, by contrast, has seen LG Chem hold the domestic No. 1 position for a long time, but at the national level, the core strength still lies in expertise around NCCs and commodity resins. That is not a criticism. A strong core business is a good thing. But if the question is whether that core business alone can overturn the global pecking order, the answer is cold: it is difficult. Players such as Lotte Chemical, Korea Petrochemical Ind. Co., Yeochun NCC, and Hanwha TotalEnergies each have strong process capabilities of their own, but the narrative needed to disrupt the global No. 1 structure is still nowhere near as compelling as it is for BASF or Sinopec. What matters from here isn’t ethylene, but how fast they can fill the gapsThe real point to watch going forward is how quickly they can close the gaps in CCUS, high-efficiency catalysts, methanol, and C1 chemistry. The ability to produce at scale and run plants stably has already been proven. So the next question is this: can Korean companies move beyond the existing NCC, BTX, and PE/PP framework toward feedstock flexibility, carbon readiness, and catalyst self-reliance? If they cannot, they will remain even more exposed to industry cycles in the commodity volume game. On the other hand, if they can fill in these blanks, the story changes. Even within the same ethylene chain, they gain a rationale for moving further downstream in the value chain. The risk is clear. Continuing to pour resources into the technologies already on the strength list may make short-term operations easier. But that is the familiar path. If they cannot narrow the gap in vulnerable technologies, they will drift further away from the conditions for long-term dominance demonstrated by BASF and Sinopec. In particular, weakness in semiconductor and display materials means petrochemicals still have only a thin connection to the high-value-added segments of downstream industries. As you may also sense, the question facing Korea’s petrochemical sector today is not, “Can it produce better?” It already can. The real question is whether it can move from being an industry that runs well to one that changes the game. ※ This article is an analysis compiled from public data and industry materials, and some figures and assessments are estimates. It is not intended as a direct basis for investment decisions. Written: June 2026. Ealexandro | ||||||||||||||||||||||||||||||
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