Handbook of Solvents - George Wypych - ChemTech - Ventech!

958 George Wypych
Table 14.16.1. Reported solvent releases from the metal casting industry in 1995 [Data
from Ref. 1]
Solvent Amount, kg/year Solvent Amount, kg/year
benzene 110,000 methyl ethyl ketone 22,000
n-butyl alcohol 15,000 methyl isobutyl ketone 22,000
cresol 20,000 N-methyl-2-pyrrolidone 41,000
dichloromethane 50,000 tetrachloroethylene 13,000
ethylbenzene 10,500 1,1,1-trichloroethane 111,000
ethylene glycol 64,000 trichloroethylene 75,000
hexachloroethane 16,000 toluene 233,000
methanol 5,860,000 xylene 388,000
Table 14.16.2. Reported solvent transfers from the metal casting industry in 1995
[Data from Ref. 1]
Solvent Amount, kg/year Solvent Amount, kg/year
benzene 115 N-methyl-2-pyrrolidone 22,000
ethylbenzene 340 1,1,1-trichloroethane 500
ethylene glycol 50,000 trichloroethylene 1,000
methanol 10,000 toluene 4,000
methyl ethyl ketone 8,000 xylene 82,000
14.17 MOTOR VEHICLE ASSEMBLY
George Wypych
ChemTec Laboratories, Inc., Toronto, Canada
Automotive industry in US alone employs 6.7 million person and it is a large contributor to
the gross national product. It uses large quantities of solvents and it is perceived to
contribute to pollution by solvents and other materials. 1-6 Solvents are used in a variety of
cleaning, preparation, and painting operations. Automotive finishing process may be divided
into four main categories: anti-corrosion operations (cleaning, phosphate treatment,
and chromic acid treatment), priming operations (electrodeposition of primer, anti-chip
coating application, and primer application), joint sealant application, and other finishing
operations (color coat, clear coat). These main operations employ many materials which
contain solvents.