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Handbook of Solvents - George Wypych - ChemTech - Ventech!

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1050 <strong>George</strong> <strong>Wypych</strong><br />

Table 14.32.5. Total transfers from different industries in the USA in 1995. [Data from<br />

EPA Office <strong>of</strong> Compliance Sector Notebooks]<br />

Industry<br />

Transfer<br />

ton/year<br />

Percent total<br />

%<br />

Transfer/employee<br />

kg/year<br />

Transfer/$1000<br />

<strong>of</strong> shipment, g<br />

Aerospace 1,080 0.4 1.3 15<br />

Metal fabrication 13,164 5.3 120 1330<br />

Inorganic chemicals 324 0.1 2.9 11<br />

Iron and steel 4,328 1.7 10.8 43<br />

Metal casting 178 0.1 0.7 6<br />

Motor vehicle 23,980 9.6 60 60<br />

Organic chemicals 63,680 25.3 509 980<br />

Petroleum 1,382 0.6 18 10<br />

Polymer & fiber 78,584 31.4 748 1708<br />

Printing 4,051 1.6 2.7 30<br />

Pulp & paper 23,457 9.4 117 293<br />

Rubber & plastics 27,215 10.9 34 302<br />

Stone, clay, ... 2,736 1.1 5.5 -<br />

Textile 1,845 0.7 3.1 26<br />

Wood furniture 4,439 1.8 18 202<br />

Total 250,443 100 Average = 110 Average = 358<br />

comes from rubber and plastics (65.5%), metal fabricating (24.8%), and polymer and fibers<br />

industry (8.1%) totals 98.4% <strong>of</strong> dichloromethane.<br />

The second tier solvents are more harmful to health and environment than the first five<br />

most frequently released and transferred solvents. Ketones are suspected carcinogens by<br />

some sources. Dichloromethane is a probable human carcinogen. 1,1,1-trichloroethane is<br />

an ozone depleter. Because <strong>of</strong> their volatility, these solvents reside mostly in the lower atmosphere<br />

causing pollution and participating in radical processes.<br />

Five industries are the largest contributors to the second tier solvents: rubber and plastics<br />

(23.8%), metal fabricating (18.1%), motor vehicle assembly (11.8%), organic chemicals<br />

(11.7%), and polymer and fiber (9.4%). Their joint contribution accounts for 74.8% <strong>of</strong><br />

the releases and transfers <strong>of</strong> these solvents.<br />

Two pertinent observations can be concluded from the above data<br />

• tight controls and applications <strong>of</strong> new technology in the top three industries using a<br />

particular solvent can make big difference<br />

• most releases and transfers stem from the use <strong>of</strong> paints and coatings.<br />

Tables 14.32.4-14.32.6 analyze releases from different industries. The polymer & fiber,<br />

pulp & paper, organic chemicals, rubber & plastics industries pollute the most from the<br />

point <strong>of</strong> view <strong>of</strong> releases and transfers <strong>of</strong> solvents.

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