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    31.
    发明专利
    未知

    公开(公告)号：DE2707638A1

    公开(公告)日：1978-08-24

    申请号：DE2707638

    申请日：1977-02-23

    Applicant: BASF AG

    Inventor： WEITZ HANS-MARTIN DIPL CHEM DR ,  HARTIG JUERGEN DIPL CHEM DR ,  PLATZ ROLF DIPL CHEM DR

    IPC: C07D301/02 ,  C07D301/32 ,  C07D303/04

    Abstract: Propylene oxide is prepared by elimination of acetic acid from propylene glycol monoacetates in the presence of a base. In contrast to the conventional elimination of acetic acid in the gas phase, the present reaction is carried out in the liquid phase in a high-boiling solvent. Because of the smaller reaction space required, the reaction in the liquid phase is simpler.

    Propylene oxide prodn. from propylene glycol mono-acetates - produced from allyl acetate and acetic acid on sulphonated cation exchanger
    32.
    发明专利
    Propylene oxide prodn. from propylene glycol mono-acetates - produced from allyl acetate and acetic acid on sulphonated cation exchanger 未知

    公开(公告)号：DE2624628A1

    公开(公告)日：1977-12-22

    申请号：DE2624628

    申请日：1976-06-02

    Applicant: BASF AG

    Inventor： DAUMILLER GUENTHER DIPL CHEM D ,  FOUQUET GERD DIPL CHEM DR ,  MERGER FRANZ DIPL CHEM DR ,  NESTLER GERHARD DIPL CHEM DR ,  PLATZ ROLF DIPL CHEM DR

    IPC: C07D301/02 ,  C07D303/04 ,  C07D301/00

    Abstract: In the prodn. of propylene oxide (1) from propylene glycol 1,2-monoacetates (II) in the gas phase in the presence of basic materials (III), allyl acetate (IV) is reacted with excess acetic acid (V) in the presence of an organic sulphonated cation exchanger (VI) with a particle size of 10-200 mu m., which is suspended in the liquid reaction mixt. After removing the excess (V) from the mixt. of propylene glycol 1,2-diacetate (VII) and (V) formed, (VII) is hydrolysed to a mixt. of (VII) and (II) in 2:1 to 1:3 molar ratio with 50-200 mole % water in the presence of (VI). The unreacted water and (V) formed are removed, and the mixt. of (VII) and (II) is converted to (I) in the gas phase at 350-425 degrees C, in the presence of (III) and the (V) formed is recycled, whilst the unchanged (VII) and (II) are also recycled. The process avoids the use of dissolved noble metal catalysts and associated catalyst losses or very corrosive catalysts requiring cost appts. for corrosion prevention and recovery. (IV) is prepd. by reacting propylene with (V) and O2 in the gas phase on catalysts contg. Pd, giving a crude mixt. of (IV), (V) and water, which is dehydrated by azeotropic distn. with (IV) as reflux.

    Ortho:benzyl-toluene prodn. from xylyl halide and benzene - using alumino-silicate catalyst is simple, cheap and efficient
    35.
    发明专利
    Ortho:benzyl-toluene prodn. from xylyl halide and benzene - using alumino-silicate catalyst is simple, cheap and efficient 未知

    公开(公告)号：DE2547030A1

    公开(公告)日：1977-05-05

    申请号：DE2547030

    申请日：1975-10-21

    Applicant: BASF AG

    Inventor： NESTLER GERHARD DIPL CHEM DR ,  PLATZ ROLF DIPL CHEM DR ,  MERGER FRANZ DIPL CHEM DR ,  BAUR KARL GERHARD DIPL CHEM DR ,  PATSCH MANFRED DIPL CHEM DR ,  JACOBSEN THEODOR DIPL CHEM DR

    IPC: C07C2/86 ,  C07C17/26 ,  C07C25/18 ,  C07C15/16

    Abstract: Prodn. of o-benzyltoluenes (I) of the formula A-B (in which A has the formula and B has the formula the R gps. are independently H or halogen and The R' gps. H, halogen or aliphatic or aromatic gps.) involves reacting o-xylyl halides (II) of the formula A-X (in which X is halogen) with benzenes (III) of the formula H-B in the presence of O-contg. cpds. (IV) of Al and Si. Reaction can be carried out (dis)continuously at 50-250 degrees C and press. up to 15 bar. It is pref. to operate without a solvent. (IV) pref. is an aluminosilicate with 1-95 mole Al2O3 per mole SiO2 and is used in amt. of 0.1-15 wt.% w.r.t. (II). (I) are valuable starting materials for the prodn. of anthracene, anthraquinone and their derivs. The process is simple and cheap, free from trouble and corrosion problems and gives (I) in good yields and purity, even at low reaction temps. Readily available starting materials are employed and no multistage syntheses are need for their prodn. The formation of sulphonation prods. is avoided and the protection of the environment is improved. In an example an o-benzylchlorotoluene isomer mixt. was obtd. in 87% yield from chloro-o-xylyl chlorides and benzene by heating 4 hrs. at 145 degrees C and 11 bar in the presence of Al silicate (10 wt.% Al2O3).

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