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Handbook of Solvents - George Wypych - ChemTech - Ventech!

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976 <strong>George</strong> <strong>Wypych</strong><br />

Figure 14.20.1. Diagram <strong>of</strong> production outputs from refineries.<br />

[Reproduced from EPA Office <strong>of</strong> Compliance Sector Notebook<br />

Project. Pr<strong>of</strong>ile <strong>of</strong> the Petroleum Refining Industry. US<br />

Environmental Protection Agency, 1995.<br />

Toluene, xylenes, and<br />

benzene constitute the majority <strong>of</strong><br />

solvent emissions since they are native<br />

components <strong>of</strong> crude oil.<br />

Methyl ethyl ketone is also emitted<br />

in large quantities because <strong>of</strong> its use<br />

in lube oil dewaxing.<br />

Pollution prevention will become<br />

increasingly important to the<br />

petroleum industry as federal, state<br />

and municipal regulations become<br />

more stringent and waste disposal<br />

cost rises. The industry estimates<br />

that to comply with 1990 Clean Air<br />

Act Amendments it will require investment<br />

<strong>of</strong> $35-40 billion. Actions<br />

required to decrease pollution include<br />

process equipment modification,<br />

waste segregation and<br />

separation, recycling, and better<br />

training and supervision.<br />

Table 14.20.1. Reported solvent releases from the petroleum refining industry in 1995<br />

[Data from Ref. 2]<br />

Solvent Amount, kg/year Solvent Amount, kg/year<br />

benzene 1,750,000 methyl isobutyl ketone 110,000<br />

n-butyl alcohol 23,000 N-methyl-2-pyrrolidone 280,000<br />

tert-butyl alcohol 28,000 methyl tert-butyl ketone 1,380,000<br />

carbon tetrachloride 17,000 tetrachloroethylene 21,000<br />

cresol 75,000 1,1,1-trichloroethane 50,000<br />

cyclohexane 960,000 trichloroethylene 730<br />

dichloromethane 8,000 1,2,4-trimethylbenzene 420,000<br />

ethylbenzene 600,000 toluene 4,360,000<br />

ethylene glycol 46,000 xylene 2,330,000<br />

hexane 3,000,000 m-xylene 170,000<br />

methanol 540,000 o-xylene 150,000<br />

methyl ethyl ketone 2,100,000 p-xylene 1,000,000

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