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    54.
    发明专利
    未知

    公开(公告)号：DE4405055A1

    公开(公告)日：1995-08-24

    申请号：DE4405055

    申请日：1994-02-17

    Applicant: BASF AG

    Inventor： BRANDT PETER DR ,  BRUCHMANN BERND DR ,  LAQUA GERHARD DR ,  MERGER FRANZ DR ,  OTTERBACH ANDREAS DR ,  STIEFENHOEFER KONRAD ,  WITZEL TOM DR ,  WOLFF STEFAN DR ,  BECKER RAINER DR

    IPC: B01J20060101 ,  B01J31/02 ,  C07B61/00 ,  C07D20060101 ,  C07D251/34 ,  C08G20060101 ,  C08G18/02 ,  C08G18/18 ,  C08G18/79 ,  C09D20060101 ,  C07D211/44 ,  C07D295/03 ,  C07D487/08 ,  C09D175/04 ,  B01J27/232 ,  B01J27/236 ,  B01J27/24

    Abstract: The prodn. of isocyanurate gp.-contg. polyisocyanates (A) comprises partial trimerisation of (cyclo)aliphatic di-isocyanates (B) in the presence of tetra-alkylammonium alkyl carbonates of formula (I) and/or quat. ammonio-alkyl carbonate betaines of formula (II) as catalyst(s), followed by deactivation of the catalyst on reaching the required deg. of trimerisation. In formulae, R , R , R = 1-20 C alkyl, 5-6C cycloalkyl, 7-10C aralkyl or Ph; or R + R can form a 5- or 6-membered cycloalkyl gp., or R + R + N can form a 5- or 6-membered ring with another N or O as bridging gp. or R + R + R + N can form a multi-membered ring with one or more extra N and/or O bridges; R = 1-4C alkyl; R = 2-20 C alkylene, 5-6C cycloalkylene, 7-10C aralkylene or phenylene; or R + R = alkylene gp. which forms a 5- to 7-membered ring with a N bridge. Pref. trimerisation catalysts are carbonates of formula (III), (IV), or (V), or betaine carbonates of formula (V), (VII) or (VIII). Trimerisation is carried out at 30-150 degrees C and the catalyst is deactivated with dibutyl phosphate (DBP); unreacted monomeric di-isocyanate is then removed. Pref. di-isocyanates are (cyclo)aliphatic di-isocyanates obtd. by a phosgene-free process, esp. by thermal cleavage of (cyclo)aliphatic dicarbamate esters; esp. pref. di-isocyanates obtd. by this method are 1,6-hexamethylenedi-isocyanate (HDI), 2-butyl-2-ethyl-pentamethylene-1,5-di-isocyanate and 1-isocyanato-3-isocyanatomethyl-3,5,5-trimethylcyclohexane (IPDI).

    55.
    发明专利
    未知

    公开(公告)号：DE4325848A1

    公开(公告)日：1995-02-02

    申请号：DE4325848

    申请日：1993-07-31

    Applicant: BASF AG

    Inventor： HUELLMANN MICHAEL DR ,  BECKER RAINER DR ,  SCHARF EMIL DR

    IPC: B01J23/74 ,  B01J23/88 ,  C07B61/00 ,  C07D295/08 ,  C07D295/088 ,  C07D295/023 ,  C07B37/10 ,  B01J23/70

    Abstract: N-(2-Hydroxyethyl)piperazine of the formula I is prepared by reaction of triethanolamine of the formula II with ammonia in the presence of hydrogen at temperatures from 100 to 500 DEG C and pressures from 10 to 500 bar on heterogeneous catalysts, employing heterogeneous catalysts having an active mass containing 20 to 85% by weight of ZrO2 and/or Al2O3, 1 to 30% by weight of oxygen-containing compounds of copper, calculated as CuO, 1 to 60% by weight of oxygen-containing compounds of cobalt calculated as CoO and/or oxygen-containing compounds of nickel, calculated as NiO and/or oxygen-containing compounds of molybdenum, calculated as MoO3.

    Process for the preparation of polytetrahydrofuran
    57.
    发明专利
    Process for the preparation of polytetrahydrofuran 未知

    公开(公告)号：DE4316137A1

    公开(公告)日：1994-11-17

    申请号：DE4316137

    申请日：1993-05-14

    Applicant: BASF AG

    Inventor： BECKER RAINER DR ,  SIGWART CHRISTOPH DR ,  PALM CHRISTOF DR ,  FRANZISCHKA WOLFGANG DR

    IPC: C08G18/28 ,  C08G18/48 ,  C08G65/20 ,  C08G65/26

    Abstract: A process for the preparation of polytetrahydrofuran or polytetrahydrofuran monoesters with C1- to C20-monocarboxylic acids or polytetrahydrofuran monoethers with monohydric C1- to C20-alcohols having a mean molecular weight of from 250 to 15,000 daltons by cationic polymerisation of tetrahydrofuran in the presence of a telogen, characterised in that tetrahydrofuran is polymerised in the presence of water, 1,4-butanediol and/or polytetrahydrofuran having a mean molecular weight of from 200 to 700 daltons and/or in the presence of a C1- to C20-monocarboxylic acid and/or a monohydric C1- to C20-alcohol with the aid of a catalytically effective amount of a bleaching earth catalyst.

    58.
    发明专利
    未知

    公开(公告)号：DE58902083D1

    公开(公告)日：1992-09-24

    申请号：DE58902083

    申请日：1989-11-06

    Applicant: BASF AG

    Inventor： HERMELING DIETER DR ,  BECKER RAINER DR ,  DOBLER WALTER DR

    IPC: C07C49/17 ,  C25B3/29 ,  C25B3/10

    Abstract: Method for the preparation of dihydroxydiones of the general formula R-CO-CH(OH)-CH(OH)-CO-R I in which R stands for an alkyl radical, in which an aldehyde of the general formula in which R has the abovementioned meaning, is electrolysed in a water- containing electrolyte which has a pH of less than 7.

    59.
    发明专利
    未知

    公开(公告)号：DE4039782A1

    公开(公告)日：1992-06-17

    申请号：DE4039782

    申请日：1990-12-13

    Applicant: BASF AG

    Inventor： HUELLMANN MICHAEL DR ,  GNAD JOSEF DR ,  BECKER RAINER DR

    IPC: C07C51/377 ,  C07C57/44 ,  C07C59/64 ,  C07C59/66 ,  C07C67/327 ,  C07C67/46 ,  C07C69/734

    Abstract: 3-Arylacrylic acids and their derivatives I in which Ar represents an aryl radical which can additionally have substituents which do not react with ketene and which are stable to acids and bases under the conditions of the reaction described below, and R denotes hydrogen, alkali metal, alkaline earth metal, ammonium or a C1- to C20-alkyl group, are prepared by reacting, in a first reaction step, a dialkyl acetal of an aromatic aldehyde II in which R represents C1- to C4-alkyl, with ketene CH2=C=O in the presence of catalytic amounts of a protonic acid or a Lewis acid to give a 3-arylpropionic acid derivative III and reacting this intermediate III, in a second reaction step, in the presence of acid or base and, additionally in the case where R denotes a C1- to C20-alkyl group, with a C1- to C20-alkanol to give the end product I.

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