Site

436C+PG8 Merak Plant, Mangunreja, Serang, Kabupaten Serang, Banten 42455, Indonesia

PT Styrindo Mono Indonesia (SMI) was a key subsidiary of PT Chandra Asri Petrochemical Tbk, Indonesia’s largest petrochemical company. As of January 1, 2021, the SMI factory is directly operated by PT Chandra Asri Petrochemical Tbk. The merger fully integrated SMI’s styrene monomer production into Chandra Asri’s operations, making it a direct part of the company’s manufacturing assets.

The SMI plant, located in Bojonegara, Banten, is Indonesia’s leading producer of styrene monomer—a crucial raw material for the plastics and synthetic rubber industries. SMI has been operating since 1990 and has a styrene monomer production capacity of 340,000 tons per year. The plant utilizes advanced technology and is strategically integrated with Chandra Asri’s broader operations to maximize efficiency and reduce duplication across the production chain. The SMI facility is also part of a broader network that includes joint ventures, such as the synthetic rubber plant developed in partnership with Compagnie Financiere Groupe Michelin, further strengthening Chandra Asri’s downstream product portfolio.

The integration of SMI’s styrene monomer production with Chandra Asri’s existing cracker and polyolefins operations is a strategic move to reinforce the company’s position as a leading supplier of essential petrochemical building blocks in Southeast Asia.

Information details from external sources

The SMI facility operates two production trains:

• The No. 1 unit has a capacity of 100,000 tons per year, though it has been periodically idled or run at reduced rates due to market conditions^[1][2].
• The No. 2 unit is larger, with a capacity of 250,000 tons per year, and is typically prioritized for domestic supply^[1][2].
• Combined, SMI’s installed styrene monomer capacity is 340,000 tons per year^[3][4].
• SMI also produces a smaller volume of toluene (about 6,200 tons per year)^[4].

The plant uses ethylene—primarily supplied by Chandra Asri’s cracker—as its main feedstock for styrene production and plays a crucial role in supplying Indonesia’s polystyrene, ABS, SBR, and related industries^[4].

References

1. Argus Media. "Indonesia's SMI plans deeper styrene production cuts." Argus Media, January 15, 2020.
2. Polymers.com.ua. "Styrindo Mono Indonesia plans to shut down production in November."
3. ChemOrbis Editorial Team. "Indonesia Chandra Asri to merge with SMI to reduce duplication." ChemOrbis, December 4, 2020.
4. Eneco Energy / Ramba Energy Ltd. "RichLand Marks Entry into Indonesia’s Chemical Logistics Sector with New Contract Wins from BASF and SMI." Eneco Energy, January 26, 2011.