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    METHOD FOR PRODUCING 3-PENTENENITRILE
    58.
    发明专利
    METHOD FOR PRODUCING 3-PENTENENITRILE 未知

    公开(公告)号：CA2552860A1

    公开(公告)日：2005-08-11

    申请号：CA2552860

    申请日：2005-01-27

    Applicant: BASF AG

    Inventor： SCHEIDEL JENS ,  JUNGKAMP TIM ,  BARTSCH MICHAEL ,  HADERLEIN GERD ,  LUYKEN HERMANN ,  BAUMANN ROBERT

    IPC: C07C253/10 ,  C07C253/34 ,  C07C255/07

    Abstract: The invention relates to a method for producing 3-pentenenitrile, said metho d being characterised by the following steps: (a) 1,3-butadiene is reacted wit h hydrogen cyanide on at least one catalyst to obtain a flow (1) containing 3- pentenenitrile, 2-methyl-3-butenenitrile, the at least one catalyst, and 1,3 - butadiene; (b) the flow (1) is distilled in a column to obtain a top product flow (2) rich in 1,3-butadiene, and a bottom product flow (3) that is poor i n 1,3-butadiene and contains 3-pentenenitrile, the at least one catalyst, and 2- methyl-3-butenenitrile; (c) the flow (3) is distilled in a column to obtain a top product flow (4) containing 1,3-butadiene, a flow (5) in a side-tap of t he column, containing 3-pentenenitrile and 2-methyl-3-butenenitrile, and a bott om product flow (6) containing the at least one catalyst; and (d) the flow (5) is distilled to obtain a top product flow (7) containing 2-methyl-3- butenenitrile, and a bottom product flow (8) containing 3-pentenenitrile.

    59.
    发明专利
    未知

    公开(公告)号：BR0311998A

    公开(公告)日：2005-04-26

    申请号：BR0311998

    申请日：2003-07-04

    Applicant: BASF AG

    Inventor： JUNGKAMP TIM ,  SCHEIDEL JENS ,  LUYKEN HERMANN ,  BARTSCH MICHAEL ,  BAUMANN ROBERT ,  HADERLEIN GERD

    IPC: B01D3/36 ,  C01G9/04 ,  F26B5/00 ,  F26B7/00 ,  C07C253/34

    Abstract: A process for the removal of water from a mixture comprising water and zinc chloride, which comprises adding to said mixture comprising water and zinc chloride an aprotic, polar diluent whose boiling point in the case where an azeotrope is not formed between said diluent and water under the pressure conditions of the distillation mentioned below is higher than the boiling point of water and which is in liquid form at this boiling point of water or which forms an azeotrope or heteroazeotrope with water under the pressure and temperature conditions of the distillation mentioned below, and distilling the mixture comprising water, zinc chloride and the diluent with removal of water or said azeotrope or said heteroazeotrope from this mixture, giving an anhydrous mixture comprising zinc chloride and said diluent.

    60.
    发明专利
    未知

    公开(公告)号：DE10317929A1

    公开(公告)日：2004-11-11

    申请号：DE10317929

    申请日：2003-04-17

    Applicant: BASF AG

    Inventor： BARTSCH MICHAEL ,  BAUMANN ROBERT ,  HADERLEIN GERD ,  FLORES MIGUEL ,  JUNGKAMP TIM ,  LUYKEN HERMANN ,  SCHEIDEL JENS ,  SIEGEL WOLFGANG ,  KUNSMANN-KEITEL DAGMAR PASCALE ,  BASLER PETER

    IPC: C01C3/02 ,  C01C3/14

    Abstract: A process for dewatering hydrocyanic acid by distillation, which includes distilling crude hydrocyanic acid containing from 50 to 99.9% by weight of HCN, from 0.1 to 40% by weight of water, from 0 to 15% by weight of carbon oxides and optionally from 0.01 to 1% by weight of an involatile stabilizer, at a pressure of from 1 bar to 2.5 bar, a bottom temperature of from 100° C. to 130° C. and a top temperature of from 25° C. to 54° C., in the absence of a volatile stabilizer, in a distillation column to obtain a top draw stream containing purified, anhydrous hydrocyanic acid and carbon oxides and a bottom draw stream including water and, optionally, the involatile stabilizer.

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