公开(公告)号：AT375066B

公开(公告)日：1984-06-25

申请号：AT582

申请日：1982-01-04

Applicant: STANDARD OIL CO OHIO

Inventor： SOCKELL EDWARD J ,  PRESSON ROBERT DEAN ,  WU HSIN-CHIH

IPC: C07C5/00 ,  B01D3/36 ,  C07C253/34 ,  C07C121/18

Abstract: A continuous process for recovering highly pure acetonitrile from crude acetonitrile containing acetonitrile, water, HCN and heavy organics, said process comprising:… (1) distilling said crude acetonitrile in a first distillation zone at a first pressure at or above 1 atmosphere to remove HCN therefrom and produce a first acetonitrile/water azeotrope and a first bottoms product containing water,… (2) distilling said first azeotrope in a second distillation zone at a second pressure less than 1 atmosphere to separate said first azeotrope into a second bottoms product containing water and a second acetonitrile/water azeotrope having a greater acetonitrile concentration than said first azeotrope, and… (3) distilling said second acetonitrile/water azeotrope in a third distillation zone at a third pressure above 1 atmosphere to produce a third acetonitrile/water azeotrope containing substantially all of the water in said second azeotrope, third bottoms product comprising acetonitrile and heavy organics and a sidestream comprising said highly pure acetonitrile. … This process enables one to obtain acetonitrile in 99+% purity. It is based upon a continuous distillation process carried out in three stages at three different pressures.

公开(公告)号：ATA582A

公开(公告)日：1983-11-15

申请号：AT582

申请日：1982-01-04

Applicant: STANDARD OIL CO OHIO

Inventor： SOCKELL EDWARD J ,  PRESSON ROBERT DEAN ,  WU HSIN-CHIH

IPC: C07C5/00 ,  B01D3/36 ,  C07C253/34 ,  C07C121/18

Abstract: A continuous process for recovering highly pure acetonitrile from crude acetonitrile containing acetonitrile, water, HCN and heavy organics, said process comprising:… (1) distilling said crude acetonitrile in a first distillation zone at a first pressure at or above 1 atmosphere to remove HCN therefrom and produce a first acetonitrile/water azeotrope and a first bottoms product containing water,… (2) distilling said first azeotrope in a second distillation zone at a second pressure less than 1 atmosphere to separate said first azeotrope into a second bottoms product containing water and a second acetonitrile/water azeotrope having a greater acetonitrile concentration than said first azeotrope, and… (3) distilling said second acetonitrile/water azeotrope in a third distillation zone at a third pressure above 1 atmosphere to produce a third acetonitrile/water azeotrope containing substantially all of the water in said second azeotrope, third bottoms product comprising acetonitrile and heavy organics and a sidestream comprising said highly pure acetonitrile. … This process enables one to obtain acetonitrile in 99+% purity. It is based upon a continuous distillation process carried out in three stages at three different pressures.

公开(公告)号：IN160761B

公开(公告)日：1987-08-01

申请号：IN500DE1985

申请日：1985-06-26

Applicant: STANDARD OIL CO OHIO

Inventor： PRESSON ROBERT DEAN ,  WU HSIN-CHIN ,  SOCKELL EDWARD JOSEPH

IPC: C07C121/18

公开(公告)号：IN159808B

公开(公告)日：1987-06-06

申请号：IN802DE1981

申请日：1981-12-23

Applicant: STANDARD OIL CO OHIO

Inventor： PRESSON ROBERT DEAN ,  WU HSIN-CHIH ,  SOCKELL EDWARD JOSEPH

IPC: C07C5/00 ,  B01D3/36 ,  C07C253/34 ,  C07C121/18

Abstract: A continuous process for recovering highly pure acetonitrile from crude acetonitrile containing acetonitrile, water, HCN and heavy organics, said process comprising:… (1) distilling said crude acetonitrile in a first distillation zone at a first pressure at or above 1 atmosphere to remove HCN therefrom and produce a first acetonitrile/water azeotrope and a first bottoms product containing water,… (2) distilling said first azeotrope in a second distillation zone at a second pressure less than 1 atmosphere to separate said first azeotrope into a second bottoms product containing water and a second acetonitrile/water azeotrope having a greater acetonitrile concentration than said first azeotrope, and… (3) distilling said second acetonitrile/water azeotrope in a third distillation zone at a third pressure above 1 atmosphere to produce a third acetonitrile/water azeotrope containing substantially all of the water in said second azeotrope, third bottoms product comprising acetonitrile and heavy organics and a sidestream comprising said highly pure acetonitrile. … This process enables one to obtain acetonitrile in 99+% purity. It is based upon a continuous distillation process carried out in three stages at three different pressures.

公开(公告)号：DE3168979D1

公开(公告)日：1985-03-28

申请号：DE3168979

申请日：1981-12-23

Applicant: STANDARD OIL CO OHIO

Inventor： PRESSON ROBERT DEAN ,  WU HSIN-CHIH ,  SOCKELL EDWARD J

IPC: C07C5/00 ,  B01D3/36 ,  C07C253/34 ,  C07C120/00 ,  C07C121/18

Abstract: A continuous process for recovering highly pure acetonitrile from crude acetonitrile containing acetonitrile, water, HCN and heavy organics, said process comprising:… (1) distilling said crude acetonitrile in a first distillation zone at a first pressure at or above 1 atmosphere to remove HCN therefrom and produce a first acetonitrile/water azeotrope and a first bottoms product containing water,… (2) distilling said first azeotrope in a second distillation zone at a second pressure less than 1 atmosphere to separate said first azeotrope into a second bottoms product containing water and a second acetonitrile/water azeotrope having a greater acetonitrile concentration than said first azeotrope, and… (3) distilling said second acetonitrile/water azeotrope in a third distillation zone at a third pressure above 1 atmosphere to produce a third acetonitrile/water azeotrope containing substantially all of the water in said second azeotrope, third bottoms product comprising acetonitrile and heavy organics and a sidestream comprising said highly pure acetonitrile. … This process enables one to obtain acetonitrile in 99+% purity. It is based upon a continuous distillation process carried out in three stages at three different pressures.