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    15.
    发明专利
    未知

    公开(公告)号：DE59304432D1

    公开(公告)日：1996-12-12

    申请号：DE59304432

    申请日：1993-04-01

    Applicant: BASF AG

    Inventor： WOLF GERHARD ,  OFTRING ALFRED ,  SCHUH GEORG ,  WOLF HELMUT ,  ALT RUDOLF ,  BECHTOLSHEIMER HANS-HEINRICH ,  HERTEL DIETER

    IPC: C07H15/04

    Abstract: PCT No. PCT/EP93/00791 Sec. 371 Date Sep. 15, 1994 Sec. 102(e) Date Sep. 15, 1994 PCT Filed Apr. 1, 1993 PCT Pub. No. WO93/21196 PCT Pub. Date Oct. 28, 1993The preparation of alkyl glycosides by reaction of aqueous glycoses having a water content of 10-80% by weight with aliphatic primary alcohols having from 5 to 30 C atoms is described, in which (a) the alcohols and the glycoses are employed in a molar ratio of 2:1 to 10:1, (b) 0.1-5% by weight, based on the amount of the glycoses employed, of the acidic form of an anionic surfactant is used as the acidic catalyst having emulsifying properties, (c) 1-30% by weight, based on the amount of the glycoses employed, of alkyl glycosides is used as a further emulsifier, (d) the aqueous glycose is preheated to 50 DEG -90 DEG C. and the preheated aqueous solution of the glycose is metered with effective mixing into the reaction mixture of alcohol, acidic catalyst and emulsifier in such a manner that an emulsion is formed, (e) the reaction is carried out at from 100 DEG to 150 DEG C. and from 10 to 100 mbar, the water introduced into the reaction mixture and the water formed by the reaction being continuously removed by distillation, (f) after the reaction has ended, the acidic catalyst is neutralized by addition of a base such that the resulting mixture has a pH of 8-10, then (g) the excess alcohol is removed by distillation at from 0.01 to 10 mbar down to a residual content of less than 5% by weight, based on the amount of alkyl glycoside present, and (h) the reaction mixture is bleached at pH 8-10 after conversion into an aqueous paste having a content of from 30 to 70% by weight of alkyl glycoside using a compound eliminating active oxygen.

    16.
    发明专利
    未知

    公开(公告)号：FI894119A0

    公开(公告)日：1989-09-01

    申请号：FI894119

    申请日：1989-09-01

    Applicant: BASF AG

    Inventor： WIDDER RUDI ,  GOUSETIS CHARALAMPOS ,  PERNER JOHANNES ,  WOLF HELMUT ,  BOCHNITSCHEK WERNER ,  OFTRING ALFRED

    IPC: C07C227/12 ,  C07C229/22 ,  C07C

    Abstract: Preparation of the trisodium salt of isoserine-N,N-diacetic acid (I) by reaction of acrylonitrile with aqueous hydrogen peroxide to give glycidamide (II) and further reaction of II with the disodium salt of iminodiacetic acid (III) to give I, by carrying out the process continuously and, in it, successively a) reacting together acrylonitrile and aqueous hydrogen peroxide at pH 7-8 and 30-60 DEG C, b) removing unreacted acrylonitrile by distillation, c) passing the reaction mixture over a solid hydrogen peroxide-decomposing catalyst, d) reacting the aqueous solution of II, obtained in this way, with III at pH 7-9 and 40-90 DEG C, e) reacting the resulting solution with a basic sodium compound at pH 9-14 and 60-95 DEG C, f) removing the ammonia which is produced by distillation and g) if desired, working up the aqueous solution of I, obtained in this way, in a manner known per se to give solid I.

    20.
    发明专利
    未知

    公开(公告)号：ES2097038T3

    公开(公告)日：1997-03-16

    申请号：ES94908161

    申请日：1993-08-12

    Applicant: BASF AG

    Inventor： WOLF GERHARD ,  WOLF HELMUT

    IPC: C07H1/00 ,  C07H15/04

    Abstract: PCT No. PCT/EP93/02131 Sec. 371 Date Feb. 1, 1995 Sec. 102(e) Date Feb. 1, 1995 PCT Filed Aug. 12, 1993 PCT Pub. No. WO94/04544 PCT Pub. Date Mar. 3, 1994Alkyl glycosides are prepared by reacting alcohols with monosaccharides or compounds which, under the reaction conditions, form monosaccharides, in the presence of amphoteric surfactants in the acid form as catalysts, and subsequently neutralizing the reaction mixture with bases.

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