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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
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公开(公告)号:IN189063B
公开(公告)日:2002-12-14
申请号:IN157DE1994
申请日:1994-02-09
Applicant: STANDARD OIL CO
Inventor: ROWE STEVEN JOSEPH , BOTT PAUL EDWARD , SHAW WILFRID GARSIDE , BIGLER KENNETH LEROY , TROTT LOUIS ROCCO , SHUKI ALBERT RICHARD , KECKLER KENNETH PAUL , KOCJANCIC FRANK JOHN , SURESH DEV DHANARAJ , FRIEDRICH MARIA STRADA , SOCKELL EDWARD JOSEPH , MIKO STEVE JOHN , REILING VINCENT GILBERT , SEELY MICHAEL J
IPC: C07C253/32 , C07C253/34
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公开(公告)号:IN187344B
公开(公告)日:2002-03-30
申请号:IN1203DE1993
申请日:1993-10-28
Applicant: STANDARD OIL CO
Inventor: BOTT PAUL EDWARD , SHUKI ALBERT RICHARD , KECKLER KENNETH PAUL , KOCJANCIC FRANK JOHN , SURESH DEV DHANARAJ , FRIEDRICH MARIE STRADA , SOCKELL EDWARD JOSEPH , MIKO STEVE JOHN , REILING VINCENT GILBERT , SEELY MICHAEL J , SHAW WILFRID GARSIDE , BIGLER KENNETH LEROY , TROTT LOUIS ROCCO
IPC: C07C121/32
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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.
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