公开(公告)号：US4166008A

公开(公告)日：1979-08-28

申请号：US820479

申请日：1977-07-29

Applicant: Hsin C. Wu ,  William O. Fitzgibbons

Inventor： Hsin C. Wu ,  William O. Fitzgibbons

IPC: C07C255/03 ,  B01D20060101 ,  B01D3/00 ,  B01D3/40 ,  C07C20060101 ,  C07C67/00 ,  C07C253/00 ,  C07C255/08 ,  C07C121/32

CPC classification number: C07C253/34 ,  B01D1/26 ,  Y10S203/03 ,  Y10S203/20

Abstract: In the recovery and purification of acrylonitrile or methacrylonitrile obtained by the ammoxidation reaction of propylene or isobutylene, the bottoms stream associated with the column for extractively distilling acrylonitrile or methacrylonitrile is both reduced in size and increased in polymer concentration by removing a vapor stream containing water from the lower fourth of said column, thus reducing the amount of solids-containing waste streams to be treated.

Abstract translation: {PG，1在通过丙烯或异丁烯的氨氧化反应获得的丙烯腈或甲基丙烯腈的回收和纯化中，与用于萃取蒸馏丙烯腈或甲基丙烯腈的塔相关的塔底料流的尺寸减小，并且通过除去蒸气而增加聚合物浓度 含有来自所述塔的较低四分之一的水的流，从而减少待处理的含固体废物流的量。

公开(公告)号：US4377444A

公开(公告)日：1983-03-22

申请号：US535402

申请日：1975-01-13

Applicant: Hsin C. Wu

Inventor： Hsin C. Wu

IPC: B01D3/34 ,  B01D3/40

CPC classification number: C07C253/34 ,  Y10S203/03 ,  Y10S203/20

Abstract: A process is described for the recovery and purification of an olefinic nitrile, such as methacrylonitrile, from mixtures of said olefinic nitrile with hydrogen cyanide, acetonitrile, acrylonitrile, and carbonyl compounds, which result from the ammoxidation of an olefin, such as isobutylene. The mixtures of olefinic nitrile are fed to an extractive distillation column at a point above the middle of the column, a vapor sidestream is removed at a point below the middle of the extractive distillation column said sidestream containing substantially all of the hydrogen cyanide, acetonitrile and carbonyl compounds and then concentrating the hydrogen cyanide, acetonitrile and carbonyl compounds in a stripping pot.

Abstract translation: 描述了从烯烃如异丁烯的氨氧化产生的从所述烯烃腈与氰化氢，乙腈，丙烯​​腈和羰基化合物的混合物中回收和纯化烯烃腈例如甲基丙烯腈的方法。 烯烃腈的混合物在塔中部的一点加入萃取蒸馏塔中，蒸馏侧流在萃取蒸馏塔中部以下一点被除去，所述侧流基本上含有所有的氰化氢，乙腈和 羰基化合物，然后将氰化氢，乙腈和羰基化合物浓缩在汽提罐中。

公开(公告)号：US4234510A

公开(公告)日：1980-11-18

申请号：US367840

申请日：1973-06-07

Applicant: Hsin C. Wu

Inventor： Hsin C. Wu

IPC: C07C255/08 ,  B01D53/14 ,  B01D57/00 ,  C07C20060101 ,  C07C67/00 ,  C07C253/00 ,  C07C253/32 ,  F25J3/02 ,  C07C120/00 ,  C07C120/14 ,  C07C121/32

CPC classification number: C07C253/34

Abstract: Acrylonitrile or methacrylonitrile found in the reactor effluent of the ammoxidation reaction of propylene or isobutylene is recovered by cooling the reactor effluent to a temperature of about 40.degree. to about 100.degree. C. using direct contacting cooling, preferably with an aqueous stream, to obtain a gaseous stream containing acrylonitrile or methacrylonitrile and cooling the gaseous stream using indirect contact cooling to condense at least some of the acrylonitrile or methacrylonitrile from the gaseous stream.

Abstract translation: 在丙烯或异丁烯的氨氧化反应的反应器流出物中发现的丙烯腈或甲基丙烯腈通过将反应器流出物冷却至约40℃至约100℃的温度来回收，使用直接接触冷却，优选与水流一起获得 含有丙烯腈或甲基丙烯腈的气流，并使用间接接触冷却冷却气流，以从气流冷凝至少一些丙烯腈或甲基丙烯腈。