25.
    发明专利
    未知

    公开(公告)号:DE59408572D1

    公开(公告)日:1999-09-09

    申请号:DE59408572

    申请日:1994-10-06

    Applicant: BASF AG

    Abstract: The preparation of carboxyl-containing copolymers of ethylene by polymer-analogous pyrolytic ester cleavage of copolymers, comprising a) from 60 to 99.9 mol% of ethylene, b) from 0.1 to 40 mol% of (C4- to C8-tert-alkyl) esters of copolymerisable C3-C12-carboxylic acids and c) from 0 to 20 mol% of further copolymerisable monomers by carrying out the pyrolytic ester cleavage at temperatures of from 150 to 250 DEG C in the presence of organic sulphonic acids, in the absence of a solvent and in the virtual absence of initiators for free-radical reactions.

    28.
    发明专利
    未知

    公开(公告)号:AT367404T

    公开(公告)日:2007-08-15

    申请号:AT02714098

    申请日:2002-01-22

    Applicant: BASF AG

    Abstract: Preparation of ethylene polymers (A) by a high pressure process involves dissolving radical initiator(s) in ketone(s) (I); compressing; dosing the mixture to the polymerization reactor in one or more portions; and carrying out polymerization. Preparation of ethylene polymers (A) by a high pressure process involves: (1) dissolving radical initiator(s) in ketone(s) of formula R 1-CO-R 2(I); (2) compressing; (3) dosing the mixture to the polymerization reactor in one or more portions; and (4) carrying out polymerization at 140-350[deg]C and 400-4500 bars. R 1, R 21-6C alkyl or 3-12C cycloalkyl; or are linked to complete a 4-13 membered ring.

    PROCESO PARA PREPARAR SALES DE ACIDO CIANHIDRICO

    公开(公告)号:PE20070058A1

    公开(公告)日:2007-02-04

    申请号:PE2006000614

    申请日:2006-06-05

    Applicant: BASF AG

    Abstract: QUE COMPRENDE: a) PREPARAR UN GAS CRUDO QUE COMPRENDE ACIDO CIANHIDRICO POR DESHIDRATACION DE FORMAMIDA HASTA UNA CONVERSION DE LA FORMAMIDA MAYOR O IGUAL A 97%, EN UN REACTOR EN PRESENCIA DE AIRE U OXIGENO Y A UNA TEMPERATURA ENTRE 300°C Y 650°C; b) DE SER APROPIADO, LAVAR CON ACIDO SULFURICO EL GAS CRUDO OBTENIDO EN (a); Y, c) HACER REACCIONAR EL GAS CRUDO OBTENIDO EN (a), O DE SER APROPIADO DE (b), CON UNA SOLUCION ACUOSA DE UN HIDROXIDO M(OH)x, DONDE M ES SELECCIONADO DEL GRUPO QUE CONSISTE EN METALES ALCALINOS Y METALES ALCALINOTERREOS, TAL COMO Li, Na Y K, Y x DEPENDE DEL ESTADO DE OXIDACION DE M Y ES 1 o 2. LA SOLUCION ACUOSA EN (c) COMPRENDE DE 5% A 50% EN PESO DE HIDROXIDO, Y (c) SE LLEVA A CABO A UNA TEMPERATURA DE 5°C A 100°C

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