METHOD FOR PREPARING ACRYLIC ACID

The present invention relates to a method for preparing acrylic acid, and provides a method for preparing acrylic acid comprising the steps of: supplying an aqueous solution of lactic acid to a reactor and causing a dehydration reaction so as to produce a reaction product comprising acrylic acid; su...

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Bibliographic Details
Main Authors KIM, Eun Kyo, KIM, Mi Kyung, KIM, Hye Bin, LYU, Byeong Gil
Format Patent
LanguageEnglish
French
Korean
Published 20.04.2023
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Summary:The present invention relates to a method for preparing acrylic acid, and provides a method for preparing acrylic acid comprising the steps of: supplying an aqueous solution of lactic acid to a reactor and causing a dehydration reaction so as to produce a reaction product comprising acrylic acid; supplying, to a first cooling tower, a reactor discharge stream comprising the reaction product, and supplying, to a second cooling tower, a top discharge stream of the first cooling tower; supplying, to an extraction tower, a first acrylic acid aqueous solution stream discharged from the bottom of the second cooling tower; supplying, to a distillation tower, a top discharge stream of the extraction tower and a second acrylic acid aqueous solution stream discharged from the bottom of the first cooling tower; and separating acrylic acid from a bottom discharge stream of the distillation tower. La présente invention porte sur un procédé de préparation d'acide acrylique, et concerne un procédé de préparation d'acide acrylique comprenant les étapes consistant à : fournir une solution aqueuse d'acide lactique à un réacteur et provoquer une réaction de déshydratation de façon à produire un produit de réaction comprenant de l'acide (méth)acrylique; acheminer, vers une première tour de refroidissement, un flux d'évacuation de réacteur comprenant le produit de réaction, et acheminer, vers une seconde tour de refroidissement, un flux d'évacuation supérieur de la première tour de refroidissement; acheminer, vers une tour d'extraction, un premier flux de solution aqueuse d'acide acrylique évacué à partir du fond de la seconde tour de refroidissement; acheminer, vers une tour de distillation, un flux d'évacuation supérieur de la tour d'extraction et un second flux de solution aqueuse d'acide acrylique évacué à partir du fond de la première tour de refroidissement; et séparer l'acide acrylique à partir d'un flux d'évacuation inférieur de la tour de distillation. 본 발명은 아크릴산 제조방법에 관한 것으로서, 젖산 수용액을 반응기에 공급하여 탈수 반응시켜 아크릴산을 포함하는 반응 생성물을 제조하는 단계; 상기 반응 생성물을 포함하는 반응기 배출 스트림을 제1 냉각탑으로 공급하고, 상기 제1 냉각탑의 상부 배출 스트림은 제2 냉각탑으로 공급하는 단계; 상기 제2 냉각탑의 하부로부터 배출되는 제1 아크릴산 수용액 스트림을 추출탑으로 공급하는 단계; 상기 추출탑의 상부 배출 스트림과 상기 제1 냉각탑의 하부로부터 배출되는 제2 아크릴산 수용액 스트림을 증류탑으로 공급하는 단계; 및 상기 증류탑의 하부 배출 스트림으로부터 아크릴산을 분리하는 단계를 포함하는 아크릴산 제조방법을 제공한다.
Bibliography:Application Number: WO2022KR08575