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    PROCESS FOR THE PREPARATION OF MIXTURES OF ISOMERS OF O-PHENOXYALKYLHYDROXYLAMINES OR O-PHENOXYALKYLOXIMES
    12.
    发明专利
    PROCESS FOR THE PREPARATION OF MIXTURES OF ISOMERS OF O-PHENOXYALKYLHYDROXYLAMINES OR O-PHENOXYALKYLOXIMES 未知

    公开(公告)号：CA2189584A1

    公开(公告)日：1995-11-16

    申请号：CA2189584

    申请日：1995-04-26

    Applicant: BASF AG

    Inventor： RANG HARALD ,  GOETZ NORBERT ,  HARREUS ALBRECHT ,  BORCHERS DIRK ,  HARTMANN HORST ,  MAYWALD VOLKER ,  HEIMANN FRANK ,  BUSCHULTE THOMAS

    IPC: B01J23/02 ,  B01J31/02 ,  C07B61/00 ,  C07C239/20 ,  C07C249/12 ,  C07C251/54 ,  C07C309/66 ,  C07C253/30 ,  C07C255/54

    Abstract: A process is disclosed for producing isomer mixtures from Ophenoxyalkylhydroxyl amines Ia: H2N-O-CH2-CH(R1)-O-Ar and Ib: H2N-O-CH(R1)-CH2-O-Ar (wherein R1 represents alkyl, Ar where appropriate a substituted phenyl) and the corresponding salt mixtures. This process involves the following steps: (a) an isomer mixture of O-(2-hydroxyethyl)-oximes (IIa) and (IIb) (in which R2 is an alkyl and R3 is an alkyl or alkoxy, or R2 and R3 together with the common C atom form a 5-7 member ring) is converted by reaction with a sulphonyl halogenide of formula (III): Hal-SO2-R4 (wherein R4 represents an organic group and Hal is a halogen) in the presence of a base to form the corresponding sulphonate mixture of (IVa) and (IVb); (b) this sulphonate mixture is reacted in the presence of a base with a phenol of formula (V): HOAr to produce a mixture of O-phenoxyalkyloximes of general formulae (VIa) and (VIb); (c) the mixture is hydrolysed in the presence of an acid and, if required, (d) the O-phenoxyalkylhydroxyl amines (Ia) and (Ib) are released from the resulting salts using a mineral base. The O-phenoxyalkylhydroxyl amines (Ia/Ib) and their precursors (VIa/VIb) are important intermediate products for plant protective agents and drugs.

    13.
    发明专利
    未知

    公开(公告)号：AT126222T

    公开(公告)日：1995-08-15

    申请号：AT91101833

    申请日：1991-02-09

    Applicant: BASF AG

    Inventor： ZIMMERMANN HORST DR ,  BRENNER KARL ,  SCHEIPER HANS-JUERGEN ,  SAUER WOLFGANG DR ,  HARTMANN HORST

    IPC: C07D307/08 ,  C07D307/32 ,  C07D307/33 ,  C07D315/00

    Abstract: Process for the preparation of THF or of THF and gamma -butyrolactone from the hydrogenation product of the hydrogenation of maleic acid, succinic acid, maleic anhydride, succinic anhydride and/or fumaric acid by treating the crude hydrogenation product without prior workup at 100 to 300 DEG C with proton acids and isolating pure tetrahydrofuran and gamma -butyrolactone from the reaction mixture obtained by distillation.

    15.
    发明专利
    未知

    公开(公告)号：DE3865596D1

    公开(公告)日：1991-11-21

    申请号：DE3865596

    申请日：1988-08-16

    Applicant: BASF AG

    Inventor： BOTT KASPAR DR ,  HARTMANN HORST ,  GUTH JOSEF

    IPC: C07C67/08 ,  C07C69/54

    Abstract: In the prodn. of carboxylate esters (I) by reacting carboxylic acids (II) with low boiling alcohols (III), the novel features are that the reaction mixt. is passed to a first distn. column and (I), water and unreacted (III) are discharged at the top of this column and passed to a second distn. column, from which : a) (III) or an azeotropic mixt. of (III) and water or (III) and (I) is discharged at the top and recycled to the esterification reaction; b) a liquid side stream is discharged and sepd. into water and (I) in a phase sepn. vessel and (I) is recycled to the distn. column below the point at which the side stream is discharged; and c) (I) is discharged as bottom prod.. Pref. (II) are 3-7 C unsatd. carboxylic acids, 2-5 C halo-carboxylic acids (opt. contaminated with the corresp. unhalogenated acids) or 2-5 C mercapto-carboxylic acids.

    16.
    发明专利
    未知

    公开(公告)号：DE4005293A1

    公开(公告)日：1991-08-22

    申请号：DE4005293

    申请日：1990-02-20

    Applicant: BASF AG

    Inventor： ZIMMERMANN HORST DR ,  BRENNER KARL ,  SCHEIPER HANS-JUERGEN ,  SAUER WOLFGANG DR ,  HARTMANN HORST

    IPC: C07D307/08 ,  C07D307/32 ,  C07D307/33 ,  C07D315/00

    Abstract: Process for the preparation of THF or of THF and gamma -butyrolactone from the hydrogenation product of the hydrogenation of maleic acid, succinic acid, maleic anhydride, succinic anhydride and/or fumaric acid by treating the crude hydrogenation product without prior workup at 100 to 300 DEG C with proton acids and isolating pure tetrahydrofuran and gamma -butyrolactone from the reaction mixture obtained by distillation.

    17.
    发明专利
    未知

    公开(公告)号：DK157311C

    公开(公告)日：1990-05-07

    申请号：DK334188

    申请日：1988-06-17

    Applicant: BASF AG

    Inventor： HORN DIETER ,  SCHMIDT HANS WILHELM ,  DITTER WALTER ,  HARTMANN HORST ,  LUEDDECKE ERIK ,  SCHMIEDER KLAUS

    IPC: A23K1/00 ,  A23L1/275 ,  A23L5/40 ,  A23L5/41 ,  A61K31/00 ,  B01J13/04 ,  C09B61/00 ,  C09B67/42

    Abstract: Finely divided, pulverulent carotinoid or retinoid compositions, in which the carotinoid or retinoid essentially has a particle size of less than 0.5 micron, are prepared by a process wherein a carotinoid or retinoid is dissolved in a volatile, water-miscible, organic solvent at from 50 DEG C. to 200 DEG C., if necessary under superatmospheric pressure, within the space of less than 10 seconds. The carotinoid is immediately precipitated, in a colloidally disperse form, from the molecularly disperse solution by rapidly mixing the latter with an aqueous solution of a swellable colloid at from 0 DEG C. to 50 DEG C., and the resulting dispersion is freed from the solvent and the dispersing medium in a conventional manner.

    RECOVERY OF FORMIC ACID BY DISTILLATION
    18.
    发明专利
    RECOVERY OF FORMIC ACID BY DISTILLATION 未知

    公开(公告)号：CA1211736A

    公开(公告)日：1986-09-23

    申请号：CA455386

    申请日：1984-05-29

    Applicant: BASF AG

    Inventor： BOTT KASPAR ,  KAIBEL GERD ,  HARTMANN HORST ,  IRNICH RUDOLF ,  BUELOW HORST

    IPC: C07C53/02 ,  C07C51/00 ,  C07C51/44 ,  C07C67/00

    Abstract: Formic acid is recovered, by distillation, from its mixtures with solvents of the general formula I where R1 is hydrogen, methyl, ethyl or vinyl and R2 and R3 are each alkyl, cycloalkyl, aryl or aralkyl, or R2 and R3 together form a 1,4- or 1,5-alkylene group of 1 to 8 carbon atoms, with the provisos that the sum of the number of carbon atoms in R2 and R3 is 7 to 14 and that only one of these radicals is aryl, by a method in which the distillation is carried out in the presence of a carboxamide II which has a boiling point lower than that of the solvent I.

    19.
    发明专利
    未知

    公开(公告)号：DK10886A

    公开(公告)日：1986-08-16

    申请号：DK10886

    申请日：1986-01-10

    Applicant: BASF AG

    Inventor： PFAFF KLAUS-PETER ,  PAUST JOACHIM ,  HARTMANN HORST

    IPC: C07H1/00 ,  B01J31/00 ,  C07B61/00 ,  C07H9/04 ,  C07H

    Abstract: Sugar ketals are prepared by reacting a sugar with a ketone in the presence of an acid catalyst by a process in which A. a molecular boron trifluoride compound or trifluoromethanesulfonic acid is used in an amount of only from 0.01 to 10% by weight, based on the sugar used, B. up to a 30-fold molar excess of the ketone is used and C. the water formed during the reaction is removed continuously from the reaction mixture. In a particularly advantageous embodiment of the process, the boron trifluoride is used in the form of boron trifluoride etherate and, when the reaction is complete, this compound or the trifluoromethanesulfonic acid is rendered ineffective under non-aqueous conditions, after which the ketone is evaporated off and the reaction mixture is then subjected to fractional distillation. The process is particularly important for the reaction of L-sorbose with acetone to obtain 2,3:4,6-di-O-isopropylidene-L-sorbofuranose, which is required for the synthesis of ascorbic acid.

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