Site

Daesan Factory

LOTTE Chemical Corporation

Predominantly Chemicals Operations

/ Seosan-si

Chungcheongnam-do

82, Dokgot 1-ro, Daesan-eup

https://www.lottechem.com/en/company/network2.do

Lotte Chemical's domestic petrochemical complex in Daesan, South Chungcheong province (Courtesy of Lotte Chemical) | via The Korea Economic Daily, 7^th Feb 2022

The Lotte Chemical Daesan Factory, also known as the Daesan Complex, is a major petrochemical production site operated by Lotte Chemical Corporation in Seosan, South Chungcheong Province, South Korea.

LOTTE Chemical acquired Hyundai Petrochemical in 2003 and expanded the NCC plant to achieve the NCC production capacity of 1 million ton for the first time in Korea. The plant focuses on energy optimization of each unit and stable operation through the zero-accident operation and is continuously expanding its production capacity.

Key Features and Operations

History and Scale: The complex began commercial operations in 2003 and has since grown into a significant player in the global petrochemical industry.
Production Capacity: The Daesan Complex produces a wide range of petrochemical products, with ethylene being the primary output. Other major products include ethylene glycol (EG), ethylbenzene, styrene, propylene, and various specialty chemicals.
Facilities: The site houses naphtha cracking centers (NCC), polyethylene plants, butadiene facilities, and factories for advanced materials such as ethylene carbonate and dimethyl carbonate—key components in lithium-ion battery electrolytes.
Recent Investments: Lotte Chemical has invested heavily in expanding the Daesan Plant’s production capacity, including a 250 billion KRW investment to boost ethylene oxide adduct (EOA) output and vertical integration with high-purity ethylene oxide (HPEO) production. Additional investments include new facilities for battery materials, reflecting a strategic pivot toward high-value and future-oriented chemical products.

Daesan Complex — Petrochemical Product Flow Diagram and Capacities* as of June 2024 (Source)

*Companies identified with their Korean name, written next to ther production capacity:
롯데케미칼 (Lotte Chemical) | LG화학 (LG Chem) | 한화토탈에너지스 (Hanwha TotalEnergies) | HD현대케미칼 (HD Hyundai Chemical) | HD현대오일뱅크 (HD Hyundai Oilbank) | 코오롱인더스트리 (Kolon Industries) | 한화솔루션 (Hanwha Solutions) | 현대OCI (Hyundai OCI)