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Management and Reduction of Chemical Substances

Management and Reduction of Chemical Substances during Production

Management and Reduction of Chemical Substances


Management of Chemical Substances

Daikin bases around the world take voluntary action to reduce the amounts of various chemical substances, such as PRTR substances and VOCs. From fiscal 2016, we are working toward a target of reducing emissions per unit of production (total of PRTR substances and VOCs) in fiscal 2020 by 5% against the standard value (average for fiscal 2013-2015).

Our Chemicals Division is working to reduce emissions of the raw material methylene chloride and our Air Conditioning Manufacturing Division is striving to reduce emissions of volatile processing oil. In addition, Daikin Industries (Thailand) Ltd. switched to low VOC processing oils. As a result of these initiatives, in fiscal 2019 we achieved a 14% reduction against the standard value.

Chemical Emissions / per Unit of Production (total of PRTR substances and VOCs)

Chemical Emissions / per Unit of Production (total of PRTR substances and VOCs)
Note:
Because the scope of calculations and the calculation method were revised in formulating the Environmental Action Plan 2020, the past fiscal year values were retroactively corrected.

The results for the fiscal 2015 and prior for the old scope of calculations and the calculation method are here (78KB).

Terminology

PRTR Law (Law concerning Pollutant Release and Transfer Register)

Enacted in Japan in 1999, the PRTR Law is a legal framework in Japan for the calculation and publicizing of the amounts of certain hazardous chemical substances that are emitted or transferred as waste into the environment (air, water, and soil) or into public sewage systems. Other countries have similar regulations. The PRTR Law was revised in 2009.

Compilation of PRTR Substances (PRTR Substances of which at Least 1 ton was Handled)

Substance name 2019
Amount emitted Amount transported
Air Public waterways Soil Waste Sewage
Chlorodifluoromethane; HCFC-22 53.64 0.00 0.00 0.00 0.00
Dichloromethane; methylene dichloride 16.86 0.00 0.00 4.60 0.00
1-chloro-1,1-difluoroethane; HCFC-142b 9.60 0.00 0.00 0.00 0.00
Toluene 2.84 0.02 0.00 0.44 0.00
2-chloro-1,1,1,2-tetrafluoroethane; HCFC-124 1.40 0.00 0.00 0.00 0.00
Chloroform 0.79 0.00 0.00 8.50 0.00
Phenol 0.73 0.00 0.00 0.74 0.00
Ethylbenzene 0.48 0.00 0.00 0.00 0.00
Formaldehyde 0.38 0.62 0.00 0.27 0.00
Hydrogen fluoride and its water-soluble salts 0.22 0.00 0.00 99.01 0.00
n-hexane 0.20 0.00 0.00 0.56 0.00
Xylene 0.68 0.00 0.00 0.00 0.00
1,3,5-trimethylbenzene 0.04 0.00 0.00 0.00 0.00
Poly(oxyethylene)alkyl ether(alkyl C=12-15)  0.04 0.02 0.00 40.00 0.25
1,2,4-trimethylbenzene 0.03 0.00 0.00 0.00 0.00
N,N-dimethylacetamide 0.02 0.00 0.00 0.00 0.00
Methylenebis(4,1-phenylene)diisocyanate 0.01 0.00 0.00 0.03 0.00
N,N-dimethylformamide 0.00 0.00 0.00 3.10 0.00
Acetonitrile 0.00 0.00 0.00 3.70 0.05
Boron compounds 0.00 0.40 0.00 0.53 0.00
Antimony and its compounds 0.00 0.00 0.00 20.00 0.00
Molybdenum and its compounds 0.00 0.00 0.00 0.04 0.00
Tritolyl phosphate 0.00 0.00 0.00 0.04 0.00
chromium and chromium(III) compounds  0.00 0.00 0.00 0.01 0.00
Allyl alcohol 0.00 0.00 0.00 0.00 0.00
ferric chloride 0.00 0.00 0.00 0.00 0.00
tetrachloromethane 0.00 0.00 0.00 0.00 0.00
styrene 0.00 0.00 0.00 0.00 0.00
copper salts (water-soluble, except complex salts) 0.00 0.00 0.00 0.00 0.00
Water-soluble salts of peroxodisulfuric acid 0.00 0.00 0.00 0.00 0.00
Methylnaphthalene 0.00 0.00 0.00 0.00 0.00

Elimination of PFOA Emissions

Total Elimination of the Manufacture and Use of PFOA by Developing Substitutes

Perfluorooctanoic Acid (PFOA) is a man-made chemical substance that has been conventionally used as a polymerization aid for fluororesins. It does not readily degrade in nature and is thus a substance of concern for the environment and human safety. At the end of 2015, as part of its efforts toward sustainable management of chemical substances, Daikin Industries, Ltd. ceased manufacturing and using PFOA and similar compounds, as well as products made from these.

After stopping the manufacture of PFOA, we conduct sampling inspections of PFOA concentration in products checking whether any contaminants from the environment are present, and we have been replacing it with substitutes that have a lower negative impact on the environment. For these substitutes as well, we are minimizing their discharge into the environment by pooling our technologies as part of our ongoing efforts to lower environmental burden.

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