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    13.
    发明专利
    未知

    公开(公告)号：DE58903215D1

    公开(公告)日：1993-02-18

    申请号：DE58903215

    申请日：1989-08-18

    Applicant: HOECHST AG

    Inventor： BLICKLE PETER DR ,  SCHWERTFEGER WERNER DR

    IPC: C07C43/12 ,  C07C59/135 ,  C25B3/23 ,  C25B3/29 ,  C25B3/02 ,  C25B3/10

    Abstract: The invention relates to a method for the electrolytic decarboxylation of a perfluoro carboxylic acid of the formula (I) with x = 1 to 4 or of soluble salts of this acid or of a mixture of this acid or of these salts with another perfluoro carboxylic acid of the formula (II) with y = 0 to 4 or the soluble salts thereof and subsequent dimerisation of the radicals produced in the decarboxylation. The electrolysis is carried out in methanol or methanol/water mixtures. This results in perfluoropolyethers of the formula or a mixture of symmetrical and asymmetrical perfluoropolyethers when more than one perfluoro carboxylic acid is employed.

    PROCESS FOR PRODUCING FLUOROCARBON POLYMERS THAT CONTAIN CARBOXYL GROUPS, SOME STARTING MATERIALS THEREFOR AND THE FLUOROSULPHATE COMPOUNDS OCCURRING AS INTERMEDIATES IN THE PROCESS
    16.
    发明专利
    PROCESS FOR PRODUCING FLUOROCARBON POLYMERS THAT CONTAIN CARBOXYL GROUPS, SOME STARTING MATERIALS THEREFOR AND THE FLUOROSULPHATE COMPOUNDS OCCURRING AS INTERMEDIATES IN THE PROCESS 未知

    公开(公告)号：DE3374200D1

    公开(公告)日：1987-12-03

    申请号：DE3374200

    申请日：1983-02-23

    Applicant: HOECHST AG

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

    IPC: C08F8/12

    Abstract: (1).COOH gp.-contg. uncrosslinked fluorocarbon polymers are prepd. by (a) first reacting partly new uncrosslinked fluorocarbon polymers in which linear macromols. bear side-chains having the end-gp. -CHFX (where X is F or CF3) with peroxydisulphuryl difluoride FSO2O-OSO2F to form the corresp. fluorosulphato derivs. (I), contg. side-chain end-gps. -CFX-OSO2F. (b) If (i) X is F, (I) are reacted with an alcohol havino formula ROH (where R is 1-6C alkyl, esp. Me or Et) to form esters having side-chain end qps. -COOR, which are saponified to the free -COOH gps., as such or in salt form. Alternatively, (I) are hydrolysed directly with water, in the presence of a solvent, and/or base, to prods. contg. -COOH in free or salt form as the side-chain end gp. If (ii) X is CF3, (I) are decomposed to ketones contg. side-chain end gps. -CO-CF3 in the presence of alkali fluoride- and/or aprotic N base catalysts. The ketones are then hydrolysed to prods. contg. -COOH, in free- or salt form, as side-chain end gps. (2).New uncrosslinked fluorocarbon copolymers, used as raw materials, contain repeat units having formula -CF2-CF(-(-OCF2CFY-)u-Ov-(CF2)w-CHFX)- (A) (where u is 0, 1 or 2; v is 0 or 1; w is 1-7; X and Y each is F or CF3) and repeat units having formula -CF2-CFZ- (B) (where Z is Cl, F, Rf or -ORf; Rf is CF3 or opt. O atom-interrupted 2-8C perfluoroalkyl) provided (A):(B) molar ratio is 1:(2-20) esp. 1:(2-8). Intermediates (I) are also new. The COOH gp.-contg. uncrosslinked fluorocarbon polymers are used as cation exchanqer membranes in electrolysis cells, esp. in alkali chloride electrolysis.

    18.
    发明专利
    未知

    公开(公告)号：DE58903388D1

    公开(公告)日：1993-03-11

    申请号：DE58903388

    申请日：1989-07-28

    Applicant: HOECHST AG

    Inventor： SCHWERTFEGER WERNER DR ,  HINTZER KLAUS DR ,  BLICKLE PETER DR

    IPC: B01J27/12 ,  B01J27/135 ,  C07B61/00 ,  C07C51/58 ,  C07C53/50 ,  C07C59/135

    Abstract: Fluorinated carboxylic acid fluorides of the formula I (I) can be prepared from fluorinated vinyl ethers of the formula II (II) by reacting the vinyl ethers with an oxygen-containing gas in the presence of a catalytic amount of a Lewis acid. Perfluorinated carboxylic acids and derivatives thereof can be prepared from the carboxylic acid fluorides by secondary reactions, for example hydrolysis, esterification or aminolysis.

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