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    Production of very pure butanediol
    1.
    发明授权
    Production of very pure butanediol 失效
    生产非常纯的丁二醇

    公开(公告)号：US3891511A

    公开(公告)日：1975-06-24

    申请号：US27236672

    申请日：1972-07-17

    Applicant: BASF AG

    Inventor： DANNEIL AXEL ,  FLICKINGER ERICH ,  GRAEFJE HEINZ ,  PLASS REINHOLD ,  SCHNUR RUDOLF

    IPC: C07C29/80 ,  C07C31/20 ,  B01D3/00

    CPC classification number: C07C29/80 ,  C07C31/207

    Abstract: Production of very pure butanediol-1,4 by separating in column 1 crude butanediol into a fraction A containing butanediol and lower boiling components and a fraction B containing higher boiling components, separating fraction A in column 2 into an overhead and a bottoms product consisting of very pure butanediol and separating fraction B in column 3 into butanediol of lower purity and components of higher boiling point.

    Abstract translation: 通过在第1列粗丁二醇中分离成含有丁二醇和低沸点组分的级分A和含较高沸点组分的级分B，生产非常纯的丁二醇-1,4，将第2列中的馏分A分离成塔顶馏出物和由 非常纯的丁二醇和第3列中的分离馏分B为较低纯度的丁二醇和较高沸点的组分。

    Production of pure 2-ethyl hexanol by three-stage distillation
    3.
    发明授权
    Production of pure 2-ethyl hexanol by three-stage distillation 失效
    通过三级蒸馏生产纯2-乙基己内酰胺

    公开(公告)号：US3703444A

    公开(公告)日：1972-11-21

    申请号：US3703444D

    申请日：1970-10-07

    Applicant: BASF AG

    Inventor： GRAEFJE HEINZ ,  FLICKINGER ERICH

    IPC: C07C27/00 ,  C07C29/141 ,  C07C29/80 ,  C07C31/125 ,  C07C67/00 ,  B01D3/14 ,  C07C29/26

    CPC classification number: C07C29/80 ,  C07C31/125

    Abstract: AN IMPROVED PROCESS FOR THE PRODUCTION OF PURE 2-ETHYL HEXANOL (OBTAINED BY HYDROGENATION OF 2-ETHYLHEXEN-2-AL1) BY CONTINUOUS DISTILLATON IN THREE COLUMNS CONNECTED IN CASCADED FASHION THE IMPURITIES BOILING BELOW 2-ETHYL HEXANOL BEING TAKEN OVERHEAD IN THE FIRST COLUMN, PURE 2ETHYL HEXANOL BEING OVERHEAD IN THE SECOND COLUMN AND THE 2-ETHYL STILL REMAINING IN THE HIGHERBOILING IMPURITIES BEING SEPARATED IN THE THIRD COLUMN, THE IMPROVEMENT COMPRISING THE USE OF A PRESSURE OF FROM 200 TO 800 MM. OF HG AT THE HEAD OF THE SECOND COLUMN AND OF A PRESSURE OF FROM 70 TO 300 MM. OF HG AT THE HEAD OF THE THIRD COLUMN, SUFFICIENT 2-ETHYL HEXANOL BEING LEFT IN THE BOTTOMS OF THE SECOND COLUMN TO MAKE THE CONCENTRATION THEREOF AT LEAST 50%. 2-ETHYL HEXANOL IS USED IN THE MANUFACTURE OF PLASTICIZERS FOR POLYVINYL CHLORIDE.

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