[특허]Removing phenols from waste water

[미국특허] Removing phenols from waste water 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-019/00 B01D-053/14
출원번호	US-0838429 (1977-09-30)
우선권정보	DE-2527983 (1975-06-24)
발명자 / 주소	Wiesner Paul (Oberursel DE) Stonner Hans-Martin (Schwalbach DE)
출원인 / 주소	Metallgesellschaft Aktiengesellschaft (Frankfurt am Main DE 03)
인용정보	피인용 횟수 : 39 인용 특허 : 1

초록 ▼

A process for removing phenols from waste water resulting from the gasification or carbonization of coal and containing CO2, H2S and NH3, comprising mixing the waste water with a low-boiling organic solvent, separating the mixture into a solvent layer and an aqueous layer, stripping off from the aqueous layer under superatmospheric pressure the vapors of CO2, H2S and organic solvent contained therein, then stripping off from the aqueous layer the NH3 contained therein leaving a refined aqueous product layer suitable for discharge, scrubbing the stripped vapors under superatmospheric pressure with a portion of the cold refined product to remove organic solvent contained therein, condensing part of the solvent and separating it under superatmospheric pressure, and scrubbing the remaining acid gases still containing ammonia and solvent with recirculated cooled raw phenol to remove the ammonia and solvent.

대표청구항 ▼

A process for removing phenols as well as the volatile compounds NH3, CO2 and H2S from waste water resulting from gasification or degasification of coal by means of liquid/liquid countercurrent extraction of the phenols with isopropylether thereby achieving a phenol laden solvent layer and a dephenolized aqueous layer, by an organic solvent, followed by two consecutive distillation steps for separate recovery of acid gases CO2 and H2S, solvent and ammonia with a low acid gas content, comprising: (a) Extracting the waste water in countercurrent with a low-boiling organic solvent, thereby achieving a phenol laden solvent layer and a dephenolized aqueous layer, and separating the layers; (b) stripping off from the aqueous layer under superatmospheric pressure as vapors CO2, H2S, small amounts of NH3 and the organic solvent contained therein; (c) condensing the vapors of step (b) by washing them under pressure with from 5 to 20% by weight of the cold dephenolized aqueous layer from step (a) thereby to remove the NH3 as well as most of the organic solvent, thus achieving an aqueous/organic mixture with an organic solvent content exceeding the physical solubility of the organic solvent in water, settling the excess solvent by gravity as an organic layer which is drawn off from the aqueous layer which is returned to step (b); (d) scrubbing the acidic vapors from step (c) with cold circulating phenol from step (f) to recover the last traces of solvent and NH3 to receive a CO2 and H2S acid gas freed of solvent and NH3; (e) stripping the bottom product of step (b) with live steam under atmospheric pressure, thereby achieving as overhead vapors a concentrated NH3-vapor with only small amounts of CO2 and H2S, which can be either burned or condensed, and as a bottom product a treated waste water suitable for biological treatment; (f) distilling the solvent layer from step (a) in a distillation column thereby achieving as overhead product a pure solvent which is condensed and recycled to step (a) and as bottom product a phenol which is partly used for scrubbing of the acidic vapors in step (d) and partly discharged as crude phenol.

이 특허에 인용된 특허 (1) 인용/피인용 타임라인 분석

Wiesner Paul (Oberursel DT) Wohler Fritz (Frankfurt am Main DT) Stonner Hans-Martin (Frankfurt am Main DT), Process for the treatment of phenol-containing waste water from coal degassing or gasification processes.
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이 특허를 인용한 특허 (39) 인용/피인용 타임라인 분석

Robinson, Earl T.; Keckler, Kenneth P.; Raman, Pattabhi K.; Sirdeshpande, Avinash, Agglomerated particulate low-rank coal feedstock and uses thereof.
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Robinson, Earl T.; Keckler, Kenneth P.; Raman, Pattabhi K.; Sirdeshpande, Avinash, Agglomerated particulate low-rank coal feedstock and uses thereof.
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Robinson, Earl T.; Keckler, Kenneth P.; Raman, Pattabhi K.; Sirdeshpande, Avinash, Agglomerated particulate low-rank coal feedstock and uses thereof.
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Raman, Pattabhi K.; Hippo, Edwin J.; Yee, Nelson, Biomass compositions for catalytic gasification.
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Robinson, Earl T., Carbonaceous fines recycle.
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Raman, Pattabhi K.; Yee, Nelson, Catalytic gasification particulate compositions.
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Hippo, Edwin J.; Reiling, Vincent G.; Robinson, Earl T.; Raman, Pattabhi K.; Smith, Jeffery; Mims, Charles; Nahas, Nicholas Charles, Char methanation catalyst and its use in gasification processes.
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Rappas, Alkis S.; Salem, George Frederick, Coal compositions for catalytic gasification.
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Rappas, Alkis S.; Salem, George Frederick, Coal compositions for catalytic gasification.
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Robinson, Earl T.; Raman, Pattabhi K.; Wu, Wenyuan, Conversion of liquid heavy hydrocarbon feedstocks to gaseous products.
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Raman, Pattabhi K.; Jiradilok, Veeraya; Robinson, Earl T.; Sirdeshpande, Avinash, Hydromethanation of a carbonaceous feedstock.
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Robinson, Earl T.; Raman, Pattabhi K., Hydromethanation of a carbonaceous feedstock.
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Sirdeshpande, Avinash, Hydromethanation of a carbonaceous feedstock.
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Sirdeshpande, Avinash, Hydromethanation of a carbonaceous feedstock.
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Rappas, Alkis S.; Spitz, Robert A., Hydromethanation of a carbonaceous feedstock with nickel recovery.
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Rappas, Alkis S.; Spitz, Robert A., Hydromethanation of a carbonaceous feedstock with vanadium recovery.
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Preston, William E., Integrated enhanced oil recovery process.
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Raman, Pattabhi K., Integrated enhanced oil recovery process.
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Wallace, Paul, Integrated enhanced oil recovery process.
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Powell, Charles Allen; Raman, Pattabhi K.; Robinson, Earl T.; Sirdeshpande, Avinash, Integrated hydromethanation fuel cell power generation.
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Sirdeshpande, Avinash, Integrated hydromethanation fuel cell power generation.
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Burns Eugene A. (Solana Beach CA) Colby Bruce N. (Carlsbad CA), Method of extracting organic contaminants from process waters.
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Pujado Peter R. (Palatine IL) Sikonia John G. (La Grange IL), Process for the removal of trace quantities of hydrocarbonaceous compounds from an aqueous stream.
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Reiling, Vincent G.; Robinson, Earl T.; Nahas, Nicholas Charles; Smith, Jeffery; Mims, Charles, Processes for gasification of a carbonaceous feedstock.
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Robinson, Earl T.; Lau, Francis S.; Raman, Pattabhi K.; Reiling, Vincent G.; Dodson, Dwain; Rahman, Mustafiz; Nahas, Nicholas Charles, Processes for gasification of a carbonaceous feedstock.
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Robinson, Earl T.; Reiling, Vincent G.; Raman, Pattabhi K.; Gal, Eli, Processes for gasification of a carbonaceous feedstock.
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Reiling, Vincent G.; Robinson, Earl T.; Sirdeshpande, Avinash; Nahas, Nicholas Charles, Processes for hydromethanation of a carbonaceous feedstock.
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Robinson, Earl T.; Raman, Pattabhi K.; Reiling, Vincent G., Processes for hydromethanation of a carbonaceous feedstock.
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Sirdeshpande, Avinash; Robinson, Earl T., Processes for hydromethanation of a carbonaceous feedstock.
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Robinson, Earl T., Processes for making syngas-derived products.
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Rappas, Alkis S.; Spitz, Robert A., Processes for preparing a catalyzed carbonaceous particulate.
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Rappas, Alkis S.; Spitz, Robert A.; Salem, George Frederick, Processes for preparing a catalyzed coal particulate.
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Raman, Pattabhi K.; Lau, Francis S.; Robinson, Earl T., Processes for the separation of methane from a gas stream.
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Raman, Pattabhi K.; Lau, Francis S.; Robinson, Earl T.; Anthony, Donald, Reduced carbon footprint steam generation processes.
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Gash Bruce W. (Tulsa OK), Removal of phenols in groundwater after underground gasification of coal.
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Raman, Pattabhi K.; Lau, Francis S.; Robinson, Earl T., Sour shift process for the removal of carbon monoxide from a gas stream.
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Lau, Francis S.; Robinson, Earl T., Steam generating slurry gasifier for the catalytic gasification of a carbonaceous feedstock.
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Raman, Pattabhi K.; Anthony, Donald, Steam generation processes utilizing biomass feedstocks.
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Sirdeshpande, Avinash; Keckler, Kenneth P.; Robinson, Earl T.; Raman, Pattabhi K., Use of contaminated low-rank coal for combustion.
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[미국특허] Removing phenols from waste water 원문보기