[특허]Method for continuously filtering raw brine for use in chlor-alkali electrolysis

Method for continuously filtering raw brine for use in chlor-alkali electrolysis 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-037/02 B01D-037/00 B01D-021/02
출원번호	US-0499841 (2003-02-24)
우선권정보	CH-403/02(2002-03-08)
국제출원번호	PCT/CH03/000137 (2003-02-24)
§371/§102 date	20040622 (20040622)
국제공개번호	WO03/076045 (2003-09-18)
발명자 / 주소	Pfeiffer,Martin
출원인 / 주소	DRM, Dr. Mueller AG
인용정보	피인용 횟수 : 0 인용 특허 : 36

초록 ▼

The method of continuously processing raw brine with a solids content to obtain substantially solids-free pure brine (E) for use in chlor-alkali electrolysis. In this method the raw brine (A) is separated, by means of a decanter (1), into a clear brine (B) with a lower solids content and an underflow (C) with a higher solids content, and the entire clear brine (B) and a metered fraction of the underflow (C) are supplied to a backwash pressure filter (5), from which the substantially solids-free pure brine (E) and a thickened slurry (F) are separately removed. The metered fraction and the clear brine (B) are controlled so that a solids concentration at an inlet to the pressure filter is 5 to 10 times that of a solids concentration in the clear brine (B), which stabilizes operations and increases filtration output.

대표청구항 ▼

The invention claimed is: 1. A method of continuously processing raw brine with a solids content to obtain a substantially solids-free pure brine (E) for use in chlor-alkali electrolysis, said method comprising the steps of: a) supplying the raw brine (A) with the solids content to a decanter (1); b) separating the raw brine (A) into a clear brine (B) with a lower solids content than said solids content of the raw brine and an underflow (C) with a higher solids content than said solids content of the raw brine by means of the decanter (1); c) supplying a metered fraction of the underflow (C) with the higher solids content as a filtering aid and all of the clear brine (B) to a pressure filter; d) during the supplying of step c), controlling the metered fraction and the clear brine (B) during the supplying so that a solids concentration at an inlet to said pressure filter is 5 to 10 times that of a solids concentration in said clear brine (B); and e) filtering with the pressure filter to obtain the substantially solids-free pure brine (E) for chlor-alkali electrolysis and a thickened slurry (F); whereby clogging of the pressure filter is reduced and increased output of said pure brine (E) is possible. 2. The method as defined in claim 1, wherein said pressure filter is a backwashing pressure filter (5). 3. The method as defined in claim 1, further comprising adding thickeners to the raw brine in the decanter (1) in order to perform a preliminary clarification. 4. The method as defined in claim 1, wherein said lower solids content of said clear brine (B) is in a range from 30 to 100 ppm and said pure brine (E) contains less than or equal to 1 ppm of retained solids. 5. A method of continuously processing raw brine with a solids content to obtain a substantially solids-free pure brine (E) for chlor-alkali electrolysis, said method comprising the steps of: a) supplying a raw brine (A) with a solids content of from about 300 to 1,500 ppm to a decanter (1); b) separating the raw brine (A) into a clear brine (B) with a lower solids content in a range from 30 to 100 ppm, said lower solids content being less than the solids content of said raw brine (A), and an underflow (C) with a higher solids content than said solids content of the raw brine by means of the decanter (1); c) supplying a metered fraction of the underflow (C) with the higher solids content as a filtering aid and all of the clear brine (B) to a pressure filter; d) during the supplying of step c), controlling the metered fraction and the clear brine (B) during the supplying so that a solids concentration at an inlet to said pressure filter is 5 to 10 times that of a solids concentration in said clear brine (B); and e) filtering with the pressure filter to obtain the substantially solids-free pure brine (E) containing less than or equal to 1 ppm of retained solids and a thickened slurry (F); whereby clogging of the pressure filter is reduced and increased output of said pure brine (E) is possible while maintaining the retained solids in the pure brine (E) at a level of less than or equal to 1 ppm.

이 특허에 인용된 특허 (36)

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Mizutani Masumi (Gifu JPX) Mizutani Kaoru (Gifu JPX) Kawahashi Masaru (Toyonaka JPX) Fujiwara Yoshio (Ikoma JPX), Brine recycling method and apparatus therefor.
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Vaughn Walter L. (Lake Jackson TX) Burney Harry S. (Clute TX) Spradling Robert D. (Lake Jackson TX) Frable Robert R. (Midland MI), Brine treatment using ethylene carboxylic acid polymers.
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Yagishita Aisaburo (Nagoya JPX) Hine Fumio (Kasugai JPX), Filter assembly for purifying brine.
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Eisinga Hendrik, Filter press frame.
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Wigen Gerald W., Filtration and regeneration system.
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Fritts Sharon D. (Youngstown NY) Bommaraju Tilak V. (Grand Island NY) Ruthel Walter W. (Grand Island NY), Fluoride removal from aqueous streams.
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Totten Clay W. (Indio CA), Geothermal brine clarifier process for removing solids from geothermal brine.
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Betts James A. (Grand Prairie CAX) Dluzniewski Tomasz J. (Mississauga CAX), Impurity removal for sodium chlorate.
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Amend William E. (Yorba Linda CA) Kitz Kevin R. (La Quinta CA), Method for protecting stainless steel pipe and the like in geothermal brine service from stress corrosion cracking, and.
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Groenhof Hendrik C. (Oslo NOX), Method for purification and concentration of MgCl₂-brines.
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Hnigschmid-Grossich Rdiger (Niederkassel DEX) Schmittinger Peter (Niederkassel DEX) Stahl Ingo (Vellmar DEX) Wambach-Sommerhoff Karl R. (Bad Hersfeld DEX), Method for the purification and/or electrolysis of an aqueous potassium chloride solution.
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Mollard Paul (Sainte Foy les Lyon FR) Lakodey Pierre (Saint Priest FR), Method of preparing sodium chlorate by electrolysis.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Method for continuously filtering raw brine for use in chlor-alkali electrolysis 원문보기

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Method for continuously filtering raw brine for use in chlor-alkali electrolysis 원문보기

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연구과제 타임라인

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이 특허에 인용된 특허 (36)

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