公开(公告)号：KR1020000052763A

公开(公告)日：2000-08-25

申请号：KR1019997003570

申请日：1997-10-17

Applicant: 솔루티아인코포레이티드

Inventor： 모니칼발레리에스. ,  스타인마이어다니엘이. ,  워드그레고리

IPC: C07C253/34

CPC classification number: C07C253/26 ,  C07C253/34 ,  C07C255/08

Abstract: PURPOSE: Provided are recovery and purification of acrylonitrile made by catalytic ammoxidation of propylene. CONSTITUTION: In a process for purifying acrylonitrile, an ammoxidation reactor effluent containing acrylonitrile and impurities is contacted in a quench system with an aqueous quench liquid; the improvement characterized in that the quench liquid contains less than 5000 ppm by weight high boiling organic compounds. In process for purifying acrylonitrile, the process comprises contacting an ammoxidation reactor effluent containing acrylonitrile and impurities in a quench system with an aqueous quench liquid; removing a gaseous effluent from the quench system and absorbing the gaseous effluent in water in an absorption column to form an aqueous solution; feeding the aqueous solution to an extractive distillation column having a plurality of trays; introducing water above the feed point of the aqueous solution and performing an extractive distillation to produce an overhead stream containing acrylonitrile and a bottom stream containing water and impurities; feeding the bottom stream from the extractive distillation column to a stripper column containing a plurality of stripper trays, removing water and high boiling organic compounds as a bottom stream from the stripper column, removing a water containing distillate as an overhead stream from the stripper column, and recycling distillate water to the quench column, the improvement characterized in that the recycled distillate contains less than 5000 ppm by weight high boiling organic compounds.

Abstract translation: 目的：提供通过丙烯催化氨氧化制备的丙烯腈的回收和纯化。 构成：在纯化丙烯腈的方法中，将含有丙烯腈和杂质的氨氧化反应器流出物在骤冷系统中与水性骤冷液接触; 其改进之处在于骤冷液含有低于5000ppm的高沸点有机化合物。 在净化丙烯腈的过程中，该方法包括使含有丙烯腈的氨氧化反应器流出物和骤冷系统中的杂质与水性骤冷液接触; 从骤冷系统中除去气态流出物并吸收吸收塔中的水中的气态流出物以形成水溶液; 将所述水溶液进料到具有多个塔盘的萃取蒸馏塔中; 将水引入水溶液的进料点之上并进行萃取蒸馏以产生含有丙烯腈的塔顶物流和含有水和杂质的塔底物流; 将来自萃取蒸馏塔的底部料流进料到含有多个汽提塔的汽提塔，从汽提塔中除去水和高沸点有机化合物作为底部物流，从汽提塔中除去含水馏出物作为塔顶馏出物， 并将馏出物再循环到骤冷塔中，其改进之处在于回收的馏出物含有低于5000ppm重量的高沸点有机化合物。

公开(公告)号：KR100498803B1

公开(公告)日：2005-07-01

申请号：KR1019997003570

申请日：1997-10-17

Applicant: 솔루티아인코포레이티드

Inventor： 모니칼발레리에스. ,  스타인마이어다니엘이. ,  워드그레고리

IPC: C07C253/34

CPC classification number: C07C253/26 ,  C07C253/34 ,  C07C255/08

Abstract: 아크릴로니트릴의 제조공정에서의 급냉 시스템의 오염율은 급냉 시스템으로의 수성 재순환 스트림 중의 고비점 유기 화합물의 수준을 낮게 유지시킴으로써 감소된다.