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    MANUFACTURE OF TETRAHYDROFURAN
    37.
    发明专利
    MANUFACTURE OF TETRAHYDROFURAN 未知

    公开(公告)号：CA1057765A

    公开(公告)日：1979-07-03

    申请号：CA233823

    申请日：1975-08-20

    Applicant: BASF AG

    Inventor： HETZEL ECKHARD ,  WEITZ HANS-MARTIN ,  VOGEL LUDWIG ,  HARTIG JUERGEN

    IPC: B01J27/00 ,  B01J31/00 ,  C07B61/00 ,  C07D307/08

    Abstract: Tetrahydrofuran is prepared from a compound containing butanediol or capable of generating butanediol. The butanedioldonating compound is the diacetate of butanediol-1,4 which is reacted with hydrolysis and etherification by passing it downwardly through a distillation column together with an acid catalyst and passing steam upwardly therethrough. The reaction is performed at temperatures of from 80.degree. to 200.degree.C and the amount of water used is from 1.24 to 20 moles for each mole of diacetate introduced. The product which distills off is tetrahydrofuran.

    Continuous Manufacture of Dibromobutenes.
    39.
    发明专利
    Continuous Manufacture of Dibromobutenes. 未知

    公开(公告)号：GB1168695A

    公开(公告)日：1969-10-29

    申请号：GB723467

    申请日：1967-02-15

    Applicant: BASF AG

    Inventor： WEITZ HANS-MARTIN ,  HAUSDOERFER BERTHOLD ,  KOOPMANN JUERGEN

    IPC: B01J10/00 ,  C07C17/02

    Abstract: 1,168,695. Mixing apparatus. BADISCHE ANILIN-& SODA-FABRIK A.G. 15 Feb., 1967 [16 Feb., 1966], No. 7234/67. Heading B1C. [Also in Division C2] An apparatus for mixing gases, e.g. bromine and butadiene, in such a way as to produce turbulent flow (the Reynold number being above 2300), comprises a loop-shaped reactor 4 into which the gases are continuously introduced via nozzles 3 and 7 at such a velocity that the impulse transmitted to the gas causes it to circulate. The gases may be produced by evaporating liquids stored in tanks 1 and 5. Any liquid condensing in the bottom of the reactor may be recirculated via pump 9, condenser 10 and nozzle 8; discharge is effected through tank 11.

    40.
    发明专利
    未知

    公开(公告)号：FR1429481A

    公开(公告)日：1966-02-25

    申请号：FR4600

    申请日：1965-02-05

    Applicant: BASF AG

    Inventor： WEITZ HANS-MARTIN ,  FRIZ HANS ,  PLATZ ROLF

    IPC: C07C20060101

    Abstract: Acrylonitrile and methacrylonitrile are separated from mixtures, obtained by the ammonia oxidation of propylene or isobutylene, by extractive countercurrent methods wherein the extractive solvent is a 5- or 6-ring membered lactam, N-substituted lactam or lactone, an acyclic or cyclic sulphone or sulphoxide, an N-alkylcarboxylic amide, an N,N-dialkylcarboxylic acmide or propylene carbonate. The two phase flowing in counter current comprise the reaction mixture and the solvent and may be liquid/liquid phases or gas/liquid phases respectively. The process is illustrated by reference to flow drawings (not shown) representing a gas/liquid extraction and extractive distillation. A liquid/liquid extraction using an auxiliary solvent is also described. Examples relate to the use of N-methylpyrrolidone, propylene carbonate, 3 - methyltetramethylene sulphone, butyrolactone, dimethyl sulphoxide, N - q -hydroxyethyl pyrrolidone, and dimethyl-formamide as extractive solvents.

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