Process for the removal of dissolved gas from an aqueous solutio

Details Process for the removal of dissolved gas from an aqueous solutio Process for the removal of dissolved gas from an aqueous solutio

1984-07-16

1986-07-01

Bashore, S. Leon

Distillation: processes, separatory

Convective distillation with normally gaseous medium, e.g., air

203 92, 203 96, 55 37, 55 53, B01D 300, B01D 1900

Patent

active

045978336

ABSTRACT:
A process for the removal of gases dissolved in an aqueous solution containing up to about 15% by weight of ethylene oxide and up to about 0.5% by weight of dissolved gases which are selected from carbon dioxide and at least one other compound that is normally gaseous, comprising contacting said aqueous solution of ethylene oxide with water and at least one gas selected from one of said dissolved normally gaseous compounds; other than carbon dioxide or oxygen, for a time and at a temperature and pressure sufficient to effect substantially complete removal of said dissolved gases; said contact taking place in a separation column having an upper and a lower zone and up to 15 theoretical placed in each zone with said aqueous solution of ethylene oxide being added intermediate said zones, said gas being added to the bottom of said lower zone, and said water being added to the top of the upper zone.

REFERENCES:
patent: 2771473 (1956-11-01), Courter
patent: 3418338 (1968-12-01), Gilman et al.
patent: 3729899 (1973-05-01), Cunningham et al.
patent: 3922314 (1975-11-01), Cocuzza et al.
patent: 3964980 (1976-06-01), Ozero
patent: 4134797 (1979-01-01), Ozero
patent: 4437939 (1984-03-01), Bhise et al.
patent: 4469492 (1982-02-01), Lagana et al.
Chemical Abstracts, vol. 82, 1975, Snajdr et al., "Ethylene Stripping From Waste Gas in the Manufacture of Ethylene Oxide", p. 21.

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