Treatment process for acrylonitrile plant wastewater streams
AssigneeThe Standard Oil Company
InventorsNoel J. Bremer, Gary V. Goeden, David R. Woodbury
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Abstract
A process for the destruction of organic wastes and ammonia from acrylonitrile plant wastewater, comprising contacting volatilized wastewater with a catalyst at an elevated temperature so as to convert volatile organic compounds and ammonia to a mixture comprising hydrogen, nitrogen and carbon dioxide which are separated and removed from the stream, yielding a purified aqueous stream, substantially free of organic compounds and ammonia.
Claims27
A process for the destruction of organic compounds from acrylonitrile plant wastewater containing organic compounds and ammonia, comprising volatilizing the wastewater to produce a vaporous stream comprising steam, ammonia and the volatile organic compounds, contacting said vaporous stream consisting essentially of steam, ammonia and volatile organic compounds with a catalyst in a reactor at an elevated temperature of at least about 250.degree. C. so as to convert the volatile organic compounds to a mixture comprising hydrogen gas, nitrogen gas and carbon dioxide, wherein the catalyst is selected from the group consisting of (1) a supported nickel catalyst, (2) a supported platinum group metal catalyst, or (3) a supported chromate, tungstate or molybdate of an iron group metal promoted with a barium salt.
A process for the destruction of ammonia and volatile organic compounds from acrylonitrile plant wastewater containing organic compounds and ammonia, comprising
- (i) volatilizing the wastewater to produce a vaporous stream consisting essentially of steam, ammonia and the volatile organic compounds;
- (ii) contacting, in a reactor, a reactor feedstock consisting essentially of the vaporous stream with a catalyst at an elevated temperature of at least about 250.degree. C. so as to convert the volatile organic compounds and ammonia in the presence of the steam to a mixture comprising hydrogen gas, nitrogen gas and carbon dioxide, wherein said catalyst is selected from the group consisting of (1) a supported nickel catalyst, (2) a supported platinum group metal catalyst, or (3) a supported chromate, tungstate or molybdate of an iron group metal promoted with a barium salt;
- (iii) cooling and separating an effluent stream from the reactor to produce a vaporous stream comprising hydrogen gas, nitrogen gas and carbon dioxide and a liquid stream comprising water substantially free of organic compounds and ammonia.
A process for the production of boiler quality feed water from acrylonitrile plant wastewater containing organic compounds and ammonia comprising
- (i) volatilizing the wastewater to produce a vaporous stream consisting essentially of steam and volatile organic components of the wastewater and ammonia;
- (ii) contacting, in a reactor, a reactor feedstock consisting essentially of the vaporous stream with a catalyst at an elevated temperature of at least about 250.degree. C. so as to convert the volatile organic components and ammonia in the presence of the steam to a mixture comprising hydrogen gas, nitrogen gas and carbon dioxide wherein said catalyst is selected from the group consisting of (1) a supported nickel catalyst, is (2) a supported platinum group metal catalyst, or (3) a supported chromate, tungstate or molybdate of an iron group metal promoted with a barium salt;
- (iii) cooling and separating an effluent stream from the reactor to produce a vaporous stream comprising hydrogen gas, nitrogen gas and carbon dioxide, and an aqueous stream wherein the aqueous stream is boiler quality feed water.
Dependencies are inferred from the claim text.