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    2.
    发明专利
    未知

    公开(公告)号：BR8901084A

    公开(公告)日：1989-10-31

    申请号：BR8901084

    申请日：1989-03-08

    Applicant: HOECHST AG

    Inventor： HACKENBRUCH JOACHIM ,  PAPENFUHS THEODOR ,  WARNING KLAUS ,  SIEGEMUND GUENTER

    IPC: C07B61/00 ,  C07C45/00 ,  C07C45/46 ,  C07C49/813 ,  C07C49/84 ,  C07C67/00 ,  C07C315/04 ,  C07C317/22 ,  C07C317/24 ,  C07C319/20 ,  C07C323/09 ,  C07C323/22 ,  C07F7/08 ,  C07C45/61 ,  C07C47/24

    Abstract: Process for the preparation of halogenated aromatic compounds of the formula … … in which Hal denotes fluorine, chlorine or bromine and… Z denotes an aromatic group,… characterised in that a halobenzene of the formula C6H5Hal (II) is reacted under anhydrous conditions with a bis-acid halide of the formula Hal-CO-Z-CO-Hal (III) in a molar ratio of at least 2:1 in the presence of haloalkanesulphonic acids of the formula Y(CnX2n)SO3H (IV), where in the formulae II and III Hal and Z have the meaning given previously and Y denotes fluorine or hydrogen, X denotes fluorine and/or chlorine and n denotes an integer from 1 to 10, where at least one X stands for fluorine. … The invention further relates to the use of compounds of the formula I, preferably of 1,4-bis(4-fluorobenzoyl)benzene and of 1,4-bis(4-chlorobenzoyl)benzene, in the form of a clear solution in diphenyl sulphone, which has been obtained by treatment with a solid base, preferably Na2CO3, K2CO3 or MgO, for the preparation of polycondensates.

    7.
    发明专利
    未知

    公开(公告)号：BR9004539A

    公开(公告)日：1991-09-10

    申请号：BR9004539

    申请日：1990-09-12

    Applicant: HOECHST AG

    Inventor： WANZKE WOLFGANG ,  SIEGEMUND GUENTER ,  SCHMIEDER WILFRIED

    IPC: B01J23/26 ,  C07B61/00 ,  C07C17/10 ,  C07C17/20 ,  C07C19/08 ,  B01J27/12

    Abstract: The invention relates to a method for the production of 1,1,1,2-tetrafluoroethane from 1,1,1-trifluoro-2-chloroethane and hydrogen fluoride in the gas phase. This method makes use of a catalyst which contains chromium and magnesium and which can be obtained by precipitating chromium(III) hydroxide by reacting 1 mole of a water-soluble chromium(III) salt with at least 1.5 moles of magnesium hydroxide or magnesium oxide in the presence of water, converting the reaction mixture into a paste which contains chromium hydroxide and a magnesium salt, and then drying the paste and treating the product with hydrogen fluoride at temperatures of 20 to 500 DEG C.

    PROCESS FOR THE PREPARATION OF FLUOROCARBON POLYMERS CONTAINING CARBOXYL GROUPS, AND CERTAIN STARTING MATERIALS REQUIRED FOR THIS, AND THE FLUOROSULFATO COMPOUNDS FORMED AS INTERMEDIATE PRODUCTS IN THE PROCESS
    9.
    发明专利
    PROCESS FOR THE PREPARATION OF FLUOROCARBON POLYMERS CONTAINING CARBOXYL GROUPS, AND CERTAIN STARTING MATERIALS REQUIRED FOR THIS, AND THE FLUOROSULFATO COMPOUNDS FORMED AS INTERMEDIATE PRODUCTS IN THE PROCESS 未知

    公开(公告)号：CA1231198A

    公开(公告)日：1988-01-05

    申请号：CA422387

    申请日：1983-02-25

    Applicant: HOECHST AG

    Inventor： BLICKLE PETER ,  BRANDRUP JOHANNES ,  MILLAUER HANS ,  SCHWERTFEGER WERNER ,  SIEGEMUND GUENTER

    IPC: C08F8/12

    Abstract: of the disclosure: Substantially non-crosslinked fluorocarbon polymers containing carboxyl groups are prepared starting from non-crosslinked and in some cases new, fluorocarbon polymers in which the linear macromolecules carry side chains containing the end group -CHFX (X is F or CF3). The starting polymers are first reacted with peroxodisulfuryl difluoride FSO2O-OSO2F to give the corresponding fluorosulfato derivatives containing the side chain end groups (X is F or CF3). In the event that X is F, these derivatives are then converted into the corresponding carboalkoxy derivatives by means of an alcohol, the fluorosulfato group being split off, and these carboalkoxy derivatives are then converted by saponification into the products containing the free carboxyl groups; the fluorosulfato derivatives can also be hydrolyzed with water, if appropriate in the presence of an inert solvent and/or bases, to give, without further treatment, the products containing the free carboxyl groups. The fluorosulfato derivatives in which X is CF3 in the side chain end groups are first decomposed in the presence of catalytic amounts of alkali metal fluorides and/or aprotic nitrogen bases to give the products containing the side chain end groups and the latter are then hydrolyzed to give the products containing the free carboxyl group. Virtually non-crosslinked fluorocarbon polymers containing carboxyl groups are of industrial importance in the form of cation exchanger membranes in electrolytic cells, particularly in chlor-alkali electrolysis.

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