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    Production of glyoxal
    114.
    发明专利
    Production of glyoxal 未知

    公开(公告)号：GB1041376A

    公开(公告)日：1966-09-07

    申请号：GB2668163

    申请日：1963-07-05

    Applicant: BASF AG

    Inventor： PLATZ ROLF ,  FUCHS WERNER

    IPC: C07C45/28 ,  C07C45/34

    Abstract: Glyoxal is produced by reacting ethylene with nitric acid in aqueous medium in the presence of a palladium salt as catalyst at 0 DEG to 100 DEG C., the concentration of nitric acid in the reaction mixture being 1 to 40% by weight and the amount of palladium salt being more than 0.0001% by weight. The ethylene feed may be pure or commercial ethylene or may contain other gases, e.g. ethane, and the nitric acid may be wholly or partly replaced by nitrogen oxides which yield nitric acid under the reaction conditions. Preferred palladium salts are the palladous salts, especially the chloride or nitrate, or complexes thereof but other palladium salts or substances which give palladium salts under the reaction conditions, e.g. palladium metal, may be employed. The process may be performed with co- or counter-current gas and catalyst solution flow at sub-, super- or atmospheric pressures. The catalyst may be removed from the aqueous reaction product by, for example, ion or redox exchangers or electrolytic deposition and reused. Glyoxal is recovered from the aqueous product by conventional methods.

    116.
    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.

    Production of trioxane
    117.
    发明专利
    Production of trioxane 未知

    公开(公告)号：GB949145A

    公开(公告)日：1964-02-12

    申请号：GB2642262

    申请日：1962-07-10

    Applicant: BASF AG

    Inventor： PLATZ ROLF

    IPC: C07D323/06

    Abstract: Trioxane is produced by maintaining formaldehyde in concentrated aqueous solution with an acid catalyst at between 0 DEG and 200 DEG C. and distilling off the trioxane, the distilling being performed in the presence of methanol, ethanol and/or a hemiformal thereof in sufficient amount to prevent the deposition of formaldehyde polymers in the apparatus. The trioxane is recovered from the distillate e.g. by extraction with a water immiscible solvent, evaporation of the solvent and subsequent distillation of the residue. The residue may be treated with a base before or during the subsequent distillation. U.S.A. Specifications 2,347,447 and 2,465,489 are referred to.

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