In order to respond to domestic and international demand for styrene monomer, Yamaguchi Operations is proactive in its efforts towards both expansion and streamlining of facilities.
Based on the belief that styrene monomer, a widely used industrial material, must be supplied in a stable manner and be of high quality so that it is eco-friendly, Yamaguchi Operations has acquired ISO9001 (Quality Management System) and ISO14001 (Environmental Management System) certifications in order to continue moving steadily towards the future.
Outline of Yamaguchi Operations
13-3, Nishi-oki, Nishi-okinoyama, Ube City, Yamaguchi Prefecture 759-0205
Start of operation
Progress of Yamaguchi Operations
Mitsui Chemicals, Inc.
The construction of Yamaguchi Styrene Plant was completed (Mitsui Toatsu Chemicals, Inc.).
The production of styrene monomer was commenced (240,000 t/year).
The capacity was increased up to 260,000 t/year.
The capacity was increased up to 284,000 t/year.
Yamaguchi Styrene Plant was recognized as a certified business operator according to the High Pressure Gas Control Law.
The certification as per the Industrial Safety and Health Act was obtained by Yamaguchi Styrene Plant after an inspection of the operations.
Mitsui Toatsu Chemicals, Inc. and Mitsui Petrochemicalt Industries, Ltd. merged to form Mitsui Chemicals, Inc.
The capacity was increased up to 294,000 t/year.
Yamaguchi Styrene Plant became ISO 9002 certified (Switched over to ISO 9001 later).
The certification for the Accredited Safety Inspection Executor under the High Pressure Gas Safety Act was obtained.
Yamaguchi Styrene Plant became ISO 14001certified.
Taiyo Petrochemical Co., Ltd. acquired the Yamaguchi styrene plant. Shareholders of Taiyo Petrochemical Co., Ltd. (as of the end of March 2009)
Yamaguchi Operations established at the request of Taiyo Petrochemical Co., Ltd. to operate Yamaguchi Styrene plant, and production of styrene monomer commenced.
The certification for the Accredited Safety Inspection Executor under the High Pressure Gas Safety Act was continued.