KR950032583A - Single Column Extractive Distillation for Separation of Aromatic Hydrocarbons from Hydrocarbon Mixtures - Google Patents

Single Column Extractive Distillation for Separation of Aromatic Hydrocarbons from Hydrocarbon Mixtures Download PDF

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KR950032583A
KR950032583A KR1019940010064A KR19940010064A KR950032583A KR 950032583 A KR950032583 A KR 950032583A KR 1019940010064 A KR1019940010064 A KR 1019940010064A KR 19940010064 A KR19940010064 A KR 19940010064A KR 950032583 A KR950032583 A KR 950032583A
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South Korea
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stream
aromatic
fractionation zone
distillation column
solvent
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KR1019940010064A
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Korean (ko)
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KR100295714B1 (en
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에이. 비듀이라 조세
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토마스 케이. 맥브라이드
유오피
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Abstract

본 발명은 단일 증류탑에서 방향족 선택성 용매로서 폴리알켄 글리콜 또는 술폴란계 용매를 사용하여 방향족 및 비방향족 탄화수소를 함유하는 원료 스트림으로부터 고순도의 방향족 탄화수소를 분리시키는 방법에 관한 것이다.The present invention relates to a process for separating high purity aromatic hydrocarbons from a feed stream containing aromatic and non-aromatic hydrocarbons using polyalkene glycol or sulfolane solvents as aromatic selective solvent in a single distillation column.

Description

탄화수소 혼합물로부터 방향족 탄화수소를 분리시키기 위한 단일탑 추출 증류법Single Column Extractive Distillation for Separation of Aromatic Hydrocarbons from Hydrocarbon Mixtures

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 방향족 선택성 용매가 술폴란인 본 발명에 의한 공정 계통도, 제2도는 방향족 선택성 용매가 테트라에틸렌 글리콜 및 메톡시트리글리콜 에테르의 혼합물인 본 발명에 의한 공정 계통도.1 is a process flow diagram according to the invention wherein the aromatic selective solvent is sulfolane, and FIG. 2 is a process flow diagram according to the invention wherein the aromatic selective solvent is a mixture of tetraethylene glycol and methoxytriglycol ether.

Claims (4)

(a) 원료 스트림을 비방향족 탄화수소로부터 방향족 탄화수소를 분리시키는데 효과적인 추출 증류 조건으로 유지시킨 재비등 추출 증류탑의 상부 분류 대역으로 보내어 이 증류탑 내에서 원료 스트림을 상기 상부 분류 대역의 상부에 도입되는 방향족 선택성 용매로 이루어진 냉각된 희박 용매 스트림 및 저부 분류 대역에 도입되는 물로 이루어진 스트리핑 매질과 접촉시키고, (b) 상기 증류탑의 상부 분류 대역으로부터 비방향족 탄화수소 및 물로 이루어진 추출 잔류물을 회수하고, (c) 상기 증류탑의 중간 분류 대역으로부터 방향족 탄화수소, 물 및 흔적량의 방향족 선택성 용매로 이루어진 사이드 스트림을 증기상 사이드 드로우로서 회수하고, (d)상기 증류탑의 저부 분류 대역으로부터 방향족 선택성 용매로 이루어진 고온의 희박 용매 스트림을 회수하고, (e) 사이드 스트림을 제1사이클론 분리기로 보내어 방향족 풍부 탑정 스트림 및 제1수성 스트림을 얻고, (f) 방향족 풍부 탐정 스트림을 제1응축기 및 제1상 분리기로 보내어 방향족 생성물 및 제2수성상을 얻고, (g) 추출 잔류물 스트림을 제2사이클론 분리기로 보내어 탑정 추출 잔류물 스트림 및 제3수성상을 얻고, (h) 탑정 추출 잔류물 스트림을 냉각 및 응축시켜 추출 잔류물 부산물 및 제4수성상을 얻고, (i) 제1, 제2, 제3 및 제4수성상 중 적어도 일부분을 혼합시켜 스트리핑 매질 스트림을 얻고, (j)상기 고온의 희박 용매 스트림을 냉각시켜 냉각된 희박 용매 스트림을 얻는 것으로 이루어진, 방향족 및 비방향족 탄화 수소를 함유하는 원료 스트림으로부터 방향족 탄화수소를 분리시키는 방법.(a) Aromatic selectivity, which feeds the feed stream to the top of the upper fractionation zone, in which the feed stream is sent to the upper fractionation zone of the reboiling extraction distillation column maintained in the extraction distillation conditions effective to separate aromatic hydrocarbons from the non-aromatic hydrocarbons. (B) recovering the extraction residue consisting of non-aromatic hydrocarbons and water from the upper fractionation zone of the distillation column, and contacting the stripping medium consisting of a cooled lean solvent stream of solvent and water introduced into the bottom fractionation zone, A side stream consisting of aromatic hydrocarbons, water and trace amount of an aromatic selective solvent from the middle fractionation zone of the distillation column is recovered as a vapor side draw, and (d) a high temperature lean solvent stream consisting of an aromatic selective solvent from the bottom fractionation zone of the distillation column. Times (E) send the side stream to the first cyclone separator to obtain an aromatic rich overhead stream and a first aqueous stream, and (f) send the aromatic rich detective stream to the first condenser and the first phase separator to obtain the aromatic product and the second water. Obtaining the properties, (g) sending the extraction residue stream to a second cyclone separator to obtain a overhead extraction residue stream and a third aqueous phase, and (h) cooling and condensing the overhead extraction residue stream to extract extraction residue by-products and Obtain an aqueous phase, (i) mix at least a portion of the first, second, third and fourth aqueous phases to obtain a stripping medium stream, and (j) cool the hot lean solvent stream to cool the lean solvent. A process for separating aromatic hydrocarbons from a feed stream containing aromatic and nonaromatic hydrocarbons, comprising obtaining a stream. 제1항에 있어서, 상기 고온의 희박 용매 스트림을 냉각시키는 것이 상기 증류탑의 저부 분류 대역으로 보내기 전에 적어도 부분적으로 증발시킨 스트리핑 매질 스트림과 간접 열교환하는 것으로 이루어지는 방법.The method of claim 1, wherein cooling the hot lean solvent stream consists of indirect heat exchange with at least partially evaporated stripping medium stream prior to sending it to the bottom fractionation zone of the distillation column. 제1항 또는 제2항에 있어서, 방향족 선택성 용매가 폴리알켄 글리콜 또는 술폴란계 용매인 방법.The process according to claim 1 or 2, wherein the aromatic selective solvent is a polyalkene glycol or sulfolane solvent. 제1항, 2항 또는 3항에 있어서, 추가로 방향족 화합물의 벤젠 부분 약5 내지 15용적%를 추출 증류탑에 도입시키기 전에 원료 스트림과 혼합시키는 것을 포함하는 방법.4. The process according to claim 1, 2 or 3 further comprising mixing about 5-15% by volume of the benzene portion of the aromatic compound with the feed stream before introducing it into the extractive distillation column. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940010064A 1994-05-09 1994-05-09 Single Column Extraction Distillation for Separation of Aromatic Hydrocarbons from Hydrocarbon Mixtures KR100295714B1 (en)

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