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    41.
    发明专利
    未知

    公开(公告)号：DE3868970D1

    公开(公告)日：1992-04-16

    申请号：DE3868970

    申请日：1988-04-27

    Applicant: BASF AG

    Inventor： MERGER FRANZ DR ,  HETTINGER PETER DR ,  HUPFER LEOPOLD DR ,  PAETSCH JUERGEN DR ,  DECK HERIBERT ,  AUER HEINZ ,  BRUNNER ERWIN DR

    IPC: C07C69/06 ,  C07C27/00 ,  C07C27/02 ,  C07C29/38 ,  C07C29/74 ,  C07C29/88 ,  C07C31/22 ,  C07C67/00 ,  C07C67/03 ,  C07C67/08 ,  C07C67/54 ,  C07C209/00 ,  C07C209/82 ,  C07C209/86 ,  C07C211/03 ,  C07C211/05

    Abstract: Recovery of trialkylamines (I) and methyl formate (II) from reaction mixts. from the prodn. of trimethylolalkanes by reacting n-alkanals (IV) with 2.2-4.5 mole HCHO in aq. soln. and 0.6-3 mole (I) per mole (IV), followed by hydrogenation, involves: (a1) heating the mixt. to 100-200 deg. C to distil off the water present, opt. with any excess (I), and liberate (I), which is distilled off, from the trialkylammonium formate (V), giving the trimethylolalkane formate (VI); and (a2) subjecting (VI) to ester exchange with MeOH, opt. in the presence of catalytic amts. of alkali(ne earth) alcoholates (VII), giving trimethylolalkane and (II); or (b1) dehydration and sepn. of any excess free (I); and (b2) liberating (I) from (V) by treating the remaining mixt. with MeOH and heating to 100-200 deg. C to form (II) and (I); and isolating the reaction prods. in the usual way. Pref. the reaction mixt. is treated with 1-20 mole MeOH/mole (VI). (VII) is NaOMe or KOMe and is used in an amt. of 0.005-0.05 mole (VI). In method (a), (VI) is reacted with MeOH at 0-60 deg. C. In method (b), reaction with MeOH is carried out continuously at 10-25 bar and the water content of the reaction mixt. is reduced to ca. 5-15 wt.% before liberation of (I).

    43.
    发明专利
    未知

    公开(公告)号：DE3824725A1

    公开(公告)日：1990-02-15

    申请号：DE3824725

    申请日：1988-07-21

    Applicant: BASF AG

    Inventor： HOELDERICH WOLFGANG DR ,  GOETZ NORBERT DR ,  HUPFER LEOPOLD DR

    IPC: C07C45/51 ,  C07C45/52 ,  C07C45/54 ,  C07C45/58

    Abstract: Phenylacetaldehydes of the general formula I (I) where each of R1 to R5 is independently of the others hydrogen, halogen, unsubstituted or halogen-substituted alkyl, alkenyl, alkoxyl, alkylthio or cycloalkyl, are prepared by converting glycidic esters of the general formula II (II) where each of R1 to R5 is as defined above and R6 is tertbutyl or i-propyl, in the presence of zeolites and/or phosphates and/or phosphoric or boric acid on a carrier material and/or acidic metal oxides as catalysts.

    46.
    发明专利
    未知

    公开(公告)号：DE3522359A1

    公开(公告)日：1987-01-02

    申请号：DE3522359

    申请日：1985-06-22

    Applicant: BASF AG

    Inventor： HUPFER LEOPOLD DR ,  PAETSCH JUERGEN DR ,  HOTZ JOHANN ,  THIELE HEINO DR ,  ZETTLER HANS DIETER

    IPC: B01J2/00 ,  B01J2/20 ,  C07C29/94

    Abstract: In order to compound organic materials which are crystalline under standard conditions, these materials, in the pulverulent and/or molten state, are processed in a self-purging, twin-screw extruder in which the screws rotate in the same direction, ejected through one or more narrow passages into a low pressure zone, cooled and comminuted to give particles. In order to improve the pourability and shelf life, the materials are completely crystallized by the time they reach the end of the screws, and are heated during discharge through the narrow passage, in order to form a melt film. Dust-free granules havig a smooth surface can be produced in this manner.

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