KR960037630A

KR960037630A - Separation method of methyl acrylate or methyl methacrylate and methanol

Info

Publication number: KR960037630A
Application number: KR1019950008230A
Authority: KR
Inventors: 세이지 미야쟈끼; 야스다까 나까시마; 도시히로 사또오; 다다오 이다; 에쓰지 사또오; 아끼오 다니
Original assignee: 다구찌 에이이찌; 미쓰비시레이온 가부시끼가이샤; 시즈메 야스마사; 오오사까 유끼가가꾸 고오교오 가부시끼가이샤
Priority date: 1995-04-10
Filing date: 1995-04-10
Publication date: 1996-11-19
Also published as: KR100342737B1

Abstract

본 발명은 아크릴산 메틸 또는 메타크릴산 메틸과 메탄올의 혼합물 또는 아크릴산 메틸 또는 메타크릴산 메틸과 물 및 메탄올의 혼합물에서 메탄올과 공비 혼합물을 형성하는 공비용제(azeotropic solvent)를 사용하여 메탄올을 분리하는 방법에 관한 것이다. 이와 같은 혼합물은 증류탑을 사용하여 하기와 같이 증류한다. (1) 증류탑의 탑정(塔頂)으로부터 증류되어 나온 증기의 응축액 일부를 증류탑의 탑정에 다시 환류시키고 ; (2)나머지 응축액을 두층으로 분리시키고 ; (3) 상기 두층으로 분리시킨, 본질적으로 공비용제로 이루어진 상층을 증류탑의 중단에 공급하고 ; (4) 상기 두층으로 분리시킨, 본질적으로 메탄올로 이루어진 하층을 증류계 밖으로 유출시키고 ; (5) 증류탑의 탑저(塔底)로부터 아크릴산 메틸 또는 메타크릴산 메틸을, 또는 아크릴산 메틸 또는 메타크릴산 메틸과 물을 회수한다.The present invention provides a process for separating methanol using an azeotropic solvent which forms an azeotrope with methanol in a mixture of methyl acrylate or methyl methacrylate and methanol or a mixture of methyl acrylate or methyl methacrylate with water and methanol. It is about. This mixture is distilled as follows using a distillation column. (1) a part of the condensate of the vapor distilled from the column top of the distillation column is refluxed to the column top of the distillation column again; (2) separating the remaining condensate into two layers; (3) feeding the top of the distillation column essentially an adjuvant separated into two layers; (4) distilling the lower layer consisting essentially of methanol separated into the two layers out of the distillation system; (5) Methyl acrylate or methyl methacrylate, or methyl acrylate or methyl methacrylate and water are recovered from the bottom of the distillation column.

나머지 응측액을 두층으로 분리할 때 물을 메탄올의 중량에 대해 0.1∼10배 첨가한다.When the remaining coagulant is separated into two layers, water is added 0.1 to 10 times the weight of methanol.

Description

Separation method of methyl acrylate or methyl methacrylate and methanol

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명을 이용한 (메타)아크릴산 메틸과 메탄올의 혼합물로부터 연속 공정으로 메탄올을 회수하는 장치, 제2도는 종래의 기술을 이용한 (메타)아크릴산 메틸과 메탄올의 혼합물로부터 연속 공정으로 메탄올을 회수하는 장치, 제3도는 본 발명을 이용한 증류탑을 갖는 에스테르 교환반응기, 제4도는 종래의 기술을 이용한 증류탑을 갖는 에스테르 교환반응기이다.1 is a device for recovering methanol in a continuous process from a mixture of methyl (meth) acrylate and methanol using the present invention, and FIG. 2 is a methanol recovery in a continuous process from a mixture of methyl (meth) acrylate and methanol using a conventional technique. FIG. 3 is a transesterification reactor having a distillation column using the present invention, and FIG. 4 is a transesterification reactor having a distillation column using a conventional technique.

Claims

A method of distilling off methanol using an azeotropic solvent which forms an azeotrope with methanol from a mixture of methyl acrylate or methyl methacrylate and methanol or a mixture of methyl acrylate or methyl methacrylate with methanol and water. (1) a part of the condensate of steam distilled from the column top of the distillation column is refluxed to the column top of the distillation column again; (2) separating the remaining condensate into two layers; (3) feeding the top of the distillation column essentially an adjuvant separated into two layers; (4) distilling the lower layer consisting essentially of methanol separated into the two layers out of the distillation system; (5) Methyl acrylate or methyl methacrylate, or methyl acrylate or methyl methacrylate and water are recovered from the bottom of the distillation column. Method of separating methanol from mixture of methyl acrylate or methyl methacrylate and methanol or mixture of methyl acrylate or methyl methacrylate with methanol and water, characterized by the above process

2. The mixture of methyl acrylate or methyl methacrylate and methanol or methyl acrylate or methyl methacrylate according to claim 1, wherein when the remaining condensate is separated into two layers, water is added to the remaining condensate and separated into two layers. A process for separating methanol from a mixture with methanol and water.

3. A mixture of methyl acrylate or methyl methacrylate and methanol or a mixture of methyl acrylate or methyl methacrylate with methanol and water, characterized in that the amount of water added is 0.1 to 10 times the weight of methanol. How to separate methanol.

3. A mixture of methyl acrylate or methyl methacrylate and methanol or a mixture of methyl acrylate or methyl methacrylate and methanol and water, characterized in that the amount of water added is 0.5 to 5 times the weight of methanol. How to separate methanol.

The mixture of methyl acrylate or methyl methacrylate and methanol or methyl acrylate or methyl methacrylate and methanol and water, characterized in that the mixture consists of methyl acrylate and methanol. Method for separating methanol from the mixture of.

※ Note: This is to be disclosed by the original application.