[특허]Recovery of carboxylic acids from chemical plant effluents

Recovery of carboxylic acids from chemical plant effluents 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-061/00
출원번호	US-0375789 (1995-01-20)
발명자 / 주소	Al-Samadi Riad A. (Burlington CAX)
출원인 / 주소	Zenon Airport Enviromental, Inc. (Burlington CAX 03)
인용정보	피인용 횟수 : 69 인용 특허 : 0

초록 ▼

Provided is a method of removing carboxylic acids from effluent streams comprising the steps of pretreatment which may include chemical conditioning, clarification and filtering the effluent stream to remove suspended solid particles to provide a filtered stream. The filtered stream is subjected to membrane filtration to remove organic compounds having a molecular weight of greater than 150 while simultaneously permitting permeation of the membrane by the carboxylic acids to provide a membrane filtered stream. A reverse osmosis membrane is provided having a high pressure side and a low pressure side, and the membrane filtered stream is introduced to the high pressure side of the reverse osmosis membrane. The carboxylic acids are concentrated in the high pressure side of the reverse osmosis membrane. In a preferred embodiment, purified liquid (permeate) is neutralized and passed to the high pressure side of a second pass reverse osmosis membrane, producing a high-purity final permeate for plant reuse or discharge to surface water.

대표청구항 ▼

A method of removing low concentrations of carboxylic acids from aqueous effluent streams comprising the steps of: (a) filtering said effluent stream to remove solid particles to provide a filtered stream; and (b) introducing said filtered stream to the high pressure side of a first nanofiltration membrane to concentrate organic compounds having an average molecular weight of greater than 150 in the high pressure side to provide a first organic concentrate stream while simultaneously permitting permeation of said membrane by said carboxylic acids to provide a first nanofiltration membrane permeate stream containing carboxylic acids; thereafter (c) introducing said first organic concentrate stream to a high pressure side of a second nanofiltration membrane to provide a second organic concentrate stream containing organic compounds having a molecular weight of more than 150 while simultaneously permitting permeating of said second nanofiltration membrane by said carboxylic acid to provide a second nanofiltration membrane permeate stream containing carboxylic acids; (d) providing a first reverse osmosis membrane having a high pressure side and a low pressure side; (e) introducing said first and second nanofiltration membrane permeate streams to the high pressure side of said first reverse osmosis membrane; (f) concentrating said carboxylic acids in the high pressure side of said reverse osmosis membrane to provide a concentrated carboxylic acids retentate and passing a purified aqueous stream to the low pressure side of said reverse osmosis membrane to provide a purified aqueous stream; (g) recirculating a portion of said purified aqueous stream from the low pressure side of said first reverse osmosis membrane to the high pressure side of said second nanofiltration membrane; and (h) treating said concentrated carboxylic acids retentate to recover carboxylic acids therefrom.

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Gupta, Rakesh Kumar; George, Scott Ellery; Klosiewicz, Daniel William; Seo, Kab Sik; Fleenor, Coralie McKenna; Crain, Allen Lynn, Water-dispersible and multicomponent fibers from sulfopolyesters.
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Gupta, Rakesh Kumar; George, Scott Ellery; Klosiewicz, Daniel William; Seo, Kab Sik; Fleenor, Coralie McKenna; Crain, Allen Lynn, Water-dispersible and multicomponent fibers from sulfopolyesters.
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Gupta, Rakesh Kumar; George, Scott Ellery; Klosiewicz, Daniel William; Seo, Kab Sik; Fleenor, Coralie McKenna; Crain, Allen Lynn, Water-dispersible and multicomponent fibers from sulfopolyesters.
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Haile, William Alston; George, Scott Ellery; Hale, Wesley Raymond; Jenkins, Waylon Lewellyn, Water-dispersible and multicomponent fibers from sulfopolyesters.
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Haile, William Alston; George, Scott Ellery; Hale, Wesley Raymond; Jenkins, Waylon Lewellyn, Water-dispersible and multicomponent fibers from sulfopolyesters.
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Haile, William Alston; George, Scott Ellery; Hale, Wesley Raymond; Jenkins, Waylon Lewellyn, Water-dispersible and multicomponent fibers from sulfopolyesters.
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Haile, William Alston; George, Scott Ellery; Hale, Wesley Raymond; Jenkins, Waylon Lewellyn, Water-dispersible and multicomponent fibers from sulfopolyesters.
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Haile, William Alston; George, Scott Ellery; Hale, Wesley Raymond; Jenkins, Waylon Lewellyn, Water-dispersible and multicomponent fibers from sulfopolyesters.
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Haile, William Alston; George, Scott Ellery; Hale, Wesley Raymond; Jenkins, Waylon Lewellyn, Water-dispersible and multicomponent fibers from sulfopolyesters.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Recovery of carboxylic acids from chemical plant effluents 원문보기

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연합인증

Recovery of carboxylic acids from chemical plant effluents 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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