GS CALTEX — BUSINESS CH.03 / OLEFINSKR

GS CALTEX BUSINESS — CHAPTER 03

OLEFINS

900,000 tons of ethylene a year from MFC, the largest investment in company history —
the third chapter: cracking molecules open.

The column separated crude. The cracker breaks molecules. And in that hot cut, the seeds of plastics are born.

ORIGIN

The name comes from
"the oil-making gas"

In the late 18th century, chemists noticed that ethylene formed oily droplets when it met chlorine. They called it gaz oléfiant — the oil-making gas — and that is where olefin comes from.

Despite the name, what olefins make today is not oil but the raw material of plastics. The double bond (C=C) — two carbons holding hands twice — makes these molecules eager to react, and that is where films, containers, fibers and car parts begin.

PLANT — YEOSU Where the furnaces stand — molecules are cracked here

01 — MIXED FEED

Liquid and gas,
into one furnace

An ordinary cracker (NCC) takes only naphtha. MFC also feeds in ethane, LPG and refinery off-gas — that is the Mixed in its name. Low-value byproducts the refinery already had become feedstock.

01 — CRACKING

The long chain
snaps

Furnace heat breaks the long hydrocarbon chains. Where distillation separates by boiling point, cracking breaks by heat. After quenching, compression and separation, the pieces become products.

01 — OLEFINS

Where it broke,
a double bond remains

The double bond (C=C) is highly reactive — always ready to join another molecule. The ethylene and propylene made this way are the starting materials of plastics.

ETHYLENE 900K TONS / YR

02 — OUTPUT

Four things
the furnace yields

ETHYLENETHE BENCHMARK OLEFIN

Ethylene

0K tons / yr

The simplest olefin and the rice of petrochemicals — starting material for PE and much more.

PEPVCPSEVA
PROPYLENETHE 3-CARBON OLEFIN

Propylene

0K tons / yr

Feedstock for polypropylene — the light, tough plastic in car interiors and food containers.

Polypropylene (PP)
MIXED C4THE C4 CUT

Mixed C4

0K tons / yr

A blend of four-carbon molecules — feedstock for synthetic rubber and further chemistry.

Petrochemical feedstock
PYGASTHE LINK TO AROMATICS

Pyrolysis Gasoline

0K tons / yr

A cut rich in benzene, toluene and xylene — where this story meets the previous chapter again.

→ CH.02 Aromatics

03 — FEED

It starts with what it accepts

NaphthaLIQUID
0K tons/yr (max)
The light oil from refining — the cracker's staple feed.
LPGC3 · C4 · GAS
0K tons/yr (max)
Flexibility to swap in for naphtha as markets shift.
Refinery off-gasFCC OFF-GAS
0K tons/yr (max)
Gas once burned away becomes feedstock for high-value products.
SCALE Equipment that makes people look like dots — this scale is the edge

04 — THE PROJECT

The biggest decision
in company history

MFC was completed in Yeosu in November 2022. Not a mere expansion — the turning point from refiner to total energy company, a new pillar built on half a century of refining.

0T KRW

Total investmentLARGEST IN COMPANY HISTORY

2022.11

MFC completedYEOSU

0%

Less energy usedVS. CONVENTIONAL, APPROX.

0K tons

CO₂ reduced per yearVS. CONVENTIONAL

NIGHT SHIFT The furnaces never cool at night — a process that never stops

When double bonds ready to react join hands — polymerization begins. Pieces become chains, chains become materials: the world of polymer is next.