Site

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- Chiba Complex
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- Idemitsu Kosan Co., Ltd.
- Refining and Chemicals Operations
- 299-0107
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/ Chiba - 2-1 Anesakikaigan
Chiba Complex | Manufacturing flow
Refinery has around 50 refining units. Crude oil, mainly transported by large tankers from the Middle East, passes through these refining units to become petroleum products. One of the petroleum products, naphtha, is sent to a petrochemical plant and turned into petrochemicals through petrochemical units. It takes one day for crude oil to be turned into petroleum products after being sent to the atmospheric distillation unit, and another day for it to be turned into petrochemicals.
Major refining facilities (Refinery)
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As of September 16, 2024
Atmospheric distillation equipment | 1 unit | 195,000 barrels per day |
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Fluid catalytic cracker | 1 unit | 45,000 barrels/day |
Catalytic reformer | 1 unit | 17,000 barrels/day |
Heavy oil hydrodesulfurization equipment | 1 unit | 40,000 barrels/day |
Vacuum distillation equipment | 1 unit | 66,000 barrels/day |
Lubricating oil hydrorefining equipment | 1 unit | 11,600 barrels/day |
Lubricating oil hydrodewaxing equipment | 1 unit | 2,000 barrels/day |
Hydrogen production equipment | 1 unit | 980,000Nm3 /day |
aromatic extraction equipment | 1 unit | 8,200 barrels/day |
Kerosene deep desulfurization equipment | 1 unit | 60,000 barrels/day |
Light naphtha reformer equipment | 1 unit | 250,000 t/year |
Main manufacturing equipment (petrochemical plant)
Ethylene production equipment | 374,000 t/year | |
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Aromatic production equipment | paraxylene | 265,000 t/year |
high boiling point solvent | 20,000t/year | |
Styrene monomer production equipment | 210,000 t/year | |
α-olefin production equipment | 58,000 t/year | |
Cyclohexane production equipment | 115,000 t/year | |
Polypropylene production equipment *1 | 286,000 t/year | |
Syndiotactic polystyrene production equipment | 9,200 t/year | |
Composite resin manufacturing factory *1 | 54,100 t/year |
*1 Prime Polymer Co., Ltd.
Utility equipment
Refinery
Steam equipment (boiler including CO boiler) | 5 units | 1,060 t/hour | |
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Private power generation equipment | 6 units | 87,100kWh | |
utility equipment | industrial water | - | 60,000t/day |
sea water | - | 54,000m3/hour |
Petrochemical factory
Steam equipment | 1 boiler | 210 t/hour |
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Private power generation equipment | 2 groups | 95,000kWh |
Water equipment industrial water | - | 22,780t/day |
Environmental protection equipment
Refinery
Flue gas desulfurization equipment | 1 unit | 270,000Nm3 /hour |
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electrostatic precipitator | 2 groups | 793,000Nm3 /hour |
Comprehensive wastewater treatment equipment (activated sludge treatment equipment) |
1 unit | 8,160t/day |
Petrochemical factory
Flue gas denitrification equipment (BTX, ethylene, gas turbine boiler) |
1,470,000Nm3 /hour |
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Comprehensive wastewater treatment equipment |
9,000t/day |
Oil storage equipment
Refinery
crude oil tank | 27 units |
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Petroleum semi-finished products/product tanks | 147 units |
LPG tank etc. | 32 units |
Lubricating oil semi-finished products/product tanks | 134 units |
lubricant additive tank | 27 units |
chemical tank | 25 units |
Petrochemical factory
Raw material/semi-finished product tank |
86 units | 119,200kL |
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High pressure gas tank | 16 units |
10,700 tons |

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4/23/2025 8:13 AM |
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10/11/2022 11:11 AM |