Method of reducing ethylene oxide emissions

Details Method of reducing ethylene oxide emissions Method of reducing ethylene oxide emissions

1990-05-18

1991-07-23

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423226, 4232451, 4232452, 55 84, C01B 1766, B01D 5334

Patent

active

050342100

ABSTRACT:
Vent gas from the condenser-scrubber system of a reactor, in which dithionites are made by reacting a formate, sulfur dioxide, and an alkali in aqueous methanol, is reduced in its ethylene oxide content to less than 10 ppm maintaining the ratio of sulfur dioxide to ethylene oxide entering the scrubber to greater than 1.0, preferably greater than 2.5, and most preferably greater than 3.0 and at a temperature of -20.degree. C. to 0.degree. C.

REFERENCES:
patent: 4112054 (1978-09-01), Feingold et al.
patent: 4517167 (1985-05-01), Popescu et al.
patent: 4540552 (1985-09-01), Ream et al.
patent: 4622216 (1986-11-01), Winslow, Jr. et al.
Solomons, Organic Chemistry, 2nd Ed., John Wiley & Sons, 1980, pp. 306-308.

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