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    2.
    发明专利
    未知

    公开(公告)号：DE2639941A1

    公开(公告)日：1978-03-09

    申请号：DE2639941

    申请日：1976-09-04

    Applicant: HOECHST AG

    Inventor： STENZEL JUERGEN DIPL CHEM DR ,  HEYMER GERO DIPL CHEM DR

    IPC: C01B25/06 ,  C01B25/37

    Abstract: Production of phosphine. The phosphine is produced by reducing, in a first step, anhydrous zinc phosphate to zinc phosphide by treatment with carbon at a temperature higher than 1000 DEG C, and, in a second step, reacting the zinc phosphide formed in the first step with phosphoric acid. The resulting gaseous phosphine is collected, and the resulting zinc phosphate, which is obtained as a difficultly soluble precipitate, is dried, dehydrated and recycled to the first step.

    3.
    发明专利
    未知

    公开(公告)号：DE2524259A1

    公开(公告)日：1976-12-09

    申请号：DE2524259

    申请日：1975-05-31

    Applicant: HOECHST AG

    Inventor： STENZEL JUERGEN DIPL CHEM DR

    IPC: C01B25/06 ,  C01B33/06 ,  C01B25/08

    Abstract: Ferrophosphorus is utilized. To this end, a melt of ferrophosphorus is reacted with a melt of calcium silicide so as to obtain ferrosilicon and calcium phosphide.

    Appts. for O,O-di:alkyl-di:thiophosphoric acid prodn. - by acidification of its salt, then phase sepn. in a separate vessel
    4.
    发明专利
    Appts. for O,O-di:alkyl-di:thiophosphoric acid prodn. - by acidification of its salt, then phase sepn. in a separate vessel 未知

    公开(公告)号：DE2912143A1

    公开(公告)日：1980-10-09

    申请号：DE2912143

    申请日：1979-03-28

    Applicant: HOECHST AG

    Inventor： GRADL REINHARD DIPL CHEM DR ,  STENZEL JUERGEN DIPL CHEM DR

    IPC: C07F9/165

    Abstract: Appts for recovering pure acids (R1O)(R2O)P(S)SH (I) (R1 and R2 are each 1-6C opt branched alkyl or cycloakyl) from their alkali metal or ammonium salts (II) by dissolving in strong mineral acid, then sepg. liq. phases, comprises a reactor provided with stirrer supply line and overflow. The hector is fitted with an internal cylindrical barrier reaching nearly to its base, and an external cylindrical barrier surrounding it. The reactor is positioned inside a separator, tapering towards a discharge valve at the bottom, and having an aeration opening and side overflow line liq overflowing through the reactor is caught in the separator. The process can be operated continuously and provides yields of up to 98%.

    6.
    发明专利
    未知

    公开(公告)号：DE3038836A1

    公开(公告)日：1982-05-27

    申请号：DE3038836

    申请日：1980-10-15

    Applicant: HOECHST AG

    Inventor： MAURER ALEXANDER DIPL CHEM DR ,  STENZEL JUERGEN DIPL CHEM DR ,  HEYMER GERO DIPL CHEM DR

    IPC: C09K21/02 ,  C01B25/40 ,  C09K21/12

    Abstract: The invention relates to a process for making long chain ammonium polyphosphate consisting essentially of crystalline modification II. To this end, a mixture of phosphorus pentoxide and ammonium orthophosphate in a molar ratio of 1:0.9 to 1:1.1 is reacted with 0.1 to 15 mol % of melamine or its condensation products selected from melam, melem or mellon, calculated as melamine, at a temperature within the range 50 DEG to 150 DEG C. in the presence of an excess of ammonia and the reaction product is heat-treated at temperatures within the range 200 DEG to 400 DEG C.

    7.
    发明专利
    未知

    公开(公告)号：DE2632316A1

    公开(公告)日：1978-01-19

    申请号：DE2632316

    申请日：1976-07-17

    Applicant: HOECHST AG

    Inventor： STENZEL JUERGEN DIPL CHEM DR ,  HEYMER GERO DIPL CHEM DR ,  MAY CHRISTIAN

    IPC: C01B25/06

    Abstract: 1535711 Phosphine HOECHST AG 4 July 1977 [17 July 1976] 27882/77 Heading C1A In a process for the continuous production of phosphine by reacting yellow phosphorus with an aqueous alkali metal hydroxide solution in the presence of an alcohol, with the exclusion of oxygen, at 44 to 90‹ C., the phosphorus and alkali metal hydroxide solution being introduced separately from one another, the reaction is effected in two separate reaction stages, wherein, in the first reaction stage, the alkali metal hydroxide solution and phosphorus are continuously reacted with agitation in a molar ratio of 0.7:1 to 0.9:1, the resulting continuously produced gaseous phosphine is collected, and the resulting liquid phase material containing unreacted phosphorus is concurrently delivered to the second reaction stage; and, in the second reaction stage, the said unreacted phosphorus is reacted with further aqueous alkali metal hydroxide solution and the resulting gaseous reaction products are collected separately from the gaseous phosphine collected in the first reaction stage.

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