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    PROCESS FOR RECOVERY AND PURIFICATION OF OLEFINIC NITRILES
    5.
    发明专利
    PROCESS FOR RECOVERY AND PURIFICATION OF OLEFINIC NITRILES 未知

    公开(公告)号：CA1063621A

    公开(公告)日：1979-10-02

    申请号：CA239076

    申请日：1975-11-05

    Applicant: STANDARD OIL CO OHIO

    Inventor： WU HSIN C

    IPC: C07C121/32

    Abstract: IMPROVED RECOVERY AND PURIFICATION OF ACRYLONITRILE AND METHACRYLONITRILE Substantial capital and operating cost savings and improved recovery of acrylonitrile and methacrylonitrile are realized by the recycle of the product column bottoms to the quench liquid of the reactor effluent quench system.

    7.
    发明专利
    未知

    公开(公告)号：RO83616A

    公开(公告)日：1984-06-21

    申请号：RO10621281

    申请日：1981-12-30

    Applicant: STANDARD OIL CO OHIO

    Inventor： PRESSON ROBERT D ,  WU HSIN C ,  SOCKELL EDWARD

    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.

    8.
    发明专利
    未知

    公开(公告)号：RO70377A

    公开(公告)日：1980-08-15

    申请号：RO7907874

    申请日：1974-06-07

    Applicant: STANDARD OIL CO OHIO

    Inventor： WU HSIN C

    IPC: C07C255/08 ,  B01D53/14 ,  B01D57/00 ,  C07C20060101 ,  C07C67/00 ,  C07C253/00 ,  C07C253/32 ,  F25J3/02 ,  C07C121/18

    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 DEG to about 100 DEG 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.

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