中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

20 records (took 0.02 seconds)

    Production of pure anhydrous dioxolane-(1,3)
    8.
    发明专利
    Production of pure anhydrous dioxolane-(1,3) 未知

    公开(公告)号：GB1133388A

    公开(公告)日：1968-11-13

    申请号：GB1403266

    申请日：1966-03-30

    Applicant: BASF AG

    Inventor： PALM CHRISTOF

    IPC: B26F1/24 ,  C07D317/12

    Abstract: 1,133,388. Preparation of pure anhydrous dioxolane-(1,3). BADISCHE ANILIN- & SODA-FABRIK A.G. 30 March, 1966 [31 March, 1965], No. 14032/66. Heading C2C. Pure anhydrous dioxolane-(1,3) is prepared by mixing an aqueous solution of formaldehyde or a polymer thereof, with a more than stoichiometric amount of an alcohol of at least 4 carbon atoms which does not have unlimited miscibility with water at ambient temperature and transacetalating the resulting formal with ethylene glycol. The alcohol is preferably butanol or isobutanol in an amount of 200-1000 moles per cent based on the formaldehyde in the presence of a strong acid (1 to 10% by weight) or an acid ion exchanger (1 to 20%) as a catalyst at temperatures between 20‹ and 100‹ C. The water formed may be removed by azeotropic distillation, and the transacetalation is suitably effected by an excess of ethylene glycol (up to 300 moles per cent based on the formal).

    Production of acrylonitrile and methacrylonitrile
    10.
    发明专利
    Production of acrylonitrile and methacrylonitrile 未知

    公开(公告)号：GB1136744A

    公开(公告)日：1968-12-18

    申请号：GB1550066

    申请日：1966-04-07

    Applicant: BASF AG

    Inventor： WINDERL SIGFRIED ,  HOFFMANN HERWIG ,  PALM CHRISTOF ,  NOHE HEINZ ,  BAER KARL ,  HARDERS HARTWIG

    IPC: B01J23/16 ,  B01J23/30 ,  B01J23/68 ,  B01J23/70 ,  B01J23/88 ,  B01J23/887 ,  B01J23/888 ,  B01J23/89 ,  C01B21/26

    Abstract: 1,136,744. Ammonoxidation of olefin hydrocarbons. BADISCHE ANILIN- & SODAFABRIK A.G. 7 April, 1966 [10 April, 1965], No. 15500/66. Heading C2C. [Also in Division B1] Acrylonitrile or methacrylonitrile are produced by reacting propylene or isobutylene, ammonia and oxygen or gases containing molecular oxygen in the vapour phase in the presence of a catalyst comprising a mixture of metal oxides, the analysis of which mixture gives: (A) 0À1 to 20% by weight of arsenic pentoxide, (B) 1 to 50% by weight of tungstic trioxide, and (C) 1 to 50% by weight of molybdenum trioxide, the three components (A), (B) and (C) constituting up to 45% by weight of the active components of the catalyst which also contains (D) at least one of the metals lead, alkali metals and metals of atomic numbers 22 to 30 inclusive in combined form, each of the metals of this group (D), calculated as the oxides, being present in an amount of 0À1 to 10% by weight and, if desired, (E) up to 40% by weight of silver calculated as silver oxide and the total amount of the components of groups (D) and (E) in the catalyst being up to 55% by weight of the active components. The preferred catalyst compositions comprise arsenic pentoxide, tungstic trioxide and molybdenum trioxide in association with the following combinations of compounds of the group (D) metals: lead, chromium, cobalt and zinc; manganese, iron and zinc; or potassium, vanadium, chromium and cobalt optionally in the presence of silver oxide. The catalyst may be supported on a suitable carrier such as silica gel representing 30 to 80% by weight of the resulting mixture. The process is carried out at a temperature in the range 400‹ to 580‹ C. under fixed or fluidized bed conditions using molar ratios of propylene to oxygen and ammonia of 1: 0À5 to 1: 3 and 1: 0À5 to 1: 5 respectively in the presence of an inert gas and steam, if desired. Acetonitrile may also be obtained in low yield as a by-product.

Patent Agency Ranking