Environmental Protection
Environmentally Hazardous Substances
The Mitsui Chemicals Group is monitoring emissions of volatile organic compounds (VOCs), air pollutants (NOx, SOx, and particulate matter), hazardous air pollutants, and substances subject to the Pollutant Release and Transfer Register (PRTR) Act, and working to reduce environmental impact.
*Please refer here for scope of data.
Air
Among the hazardous air pollutants specified in the Air Pollution Control Act, we monitor emissions of priority substances that are believed to pose a high risk to human health and strive to reduce the emissions.
The Japanese government set a target of reducing fixed-source volatile organic compounds (VOCs) emissions in fiscal 2010 by 30% compared with fiscal 2000. VOCs emissions at Mitsui Chemicals reached 8,523 tons in fiscal 2000, so our target is 5,966 tons/year. However, we set a more stringent target of 3,000 tons/year or less, and succeeded in making drastic reductions by fiscal 2010. We will continue to strive to maintain emissions at this level.
Because the Mitsui Chemicals Group produces various chemical products, a wide range of VOCs are emitted. We use various methods to reduce VOCs emissions to the atmosphere, including adsorption using activated carbon and other adsorbents, neutralization with acidic or alkaline solutions, catalytic oxidation, decomposition by combustion, and recovery by Pressure Swing Adsorption (PSA)*.
Further, burning fuel in chemical product manufacturing processes generates SOx, NOx, and soot and dust. We therefore implement a variety of measures to reduce release of these items into the atmosphere by removing them using catalysts, installing dust collectors and washing towers, and using fuels free from nitrogen and sulfur.
*Pressure Swing Adsorption (PSA)
A technology that recovers VOCs by repeatedly pressurizing and depressurizing an adsorbent, taking advantage of the fact that the amount of gas adsorbed depends on pressure.
Volatile Organic Compound (VOC) Emissions
NOx Emissions
SOx Emissions
Soot and Dust Emissions
Emissions of Hazardous Air Pollutants (Mitsui Chemicals, Inc.)
Substances Subject to the PRTR Act
In accordance with the Law Concerning Reporting, etc. of Releases to the Environment of Specific Chemical Substances and Promoting Improvements in Their Management (PRTR* Act), Mitsui Chemicals submits a report to the Japanese government each year declaring the amounts of designated substances produced or used by the Company that were released into the environment or transferred elsewhere.
The Mitsui Chemicals Group continues to enhance its emissions management and has established a target of limiting annual emissions to 450 tons or less. To achieve this target, we formulate emission reduction measures.
To achieve this target by the end of fiscal 2030, we are advancing plans for facility modifications and other emission reduction initiatives. Specifically, we are installing new facilities, improving existing systems, and reviewing operational practices for the recovery and treatment of exhaust gases containing substances such as hexane and toluene.
*PRTR:
Pollutant Release and Transfer Register.
PRTR Data for Individual Sites
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