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    1.
    发明专利
    未知

    公开(公告)号：DE1443535A1

    公开(公告)日：1968-10-24

    申请号：DE1443535

    申请日：1964-08-12

    Applicant: BASF AG

    Inventor： HUGO KROEPER DR ,  HANS-MARTIN WEITZ DR ,  ROLF PLATZ DR ,  KARL SCHLOEMER DR

    IPC: C07C67/04 ,  C07C69/54

    Abstract: Tertiary alkyl acrylates or methacrylates of the formula wherein R1 denotes an H atom or the -CH3 group and the R2 radicals which may be the same or different denote an alkyl group having from 1 to 4 C atoms, are prepared by reacting acrylic or methacrylic acid with a tertiary olefin of formula where R2 has the above meaning and R3 denotes an alkylidene group with 1 to 4 C atoms, in the presence of an active bleaching earth containing from 0.005 to 0.1 milliequivalents per gram of free titratable acid at atmospheric or superatmospheric pressure and at a temperature of from 0 DEG C. to 40 DEG C. A suitable bleaching earth comprises 50 to 70% of SiO2, 10 to 30% of Al2O3, 2 to 8% of Fe2O3, 1 to 9% of MgO and small amounts of the oxides of the other alkaline earth metals (all percentages are by weight). Examples describe the production of tertiary-butyl acrylate.

    3.
    发明专利
    未知

    公开(公告)号：DE1910473A1

    公开(公告)日：1970-09-17

    申请号：DE1910473

    申请日：1969-03-01

    Applicant: BASF AG

    Inventor： KARL SCHLOEMER DR ,  OTTO NAGEL DR-ING ,  ROLF PLATZ DR ,  HANS-MARTIN WEITZ DR

    IPC: C07C7/148 ,  C07C7/171 ,  C07C7/02

    Abstract: 1290072 Recovering isobutylene and butadiene BADISCHE ANILIN- & SODA-FABRIK AG 27 Feb 1970 [1 March 1969] 9508/70 Heading C5E Isobutylene and butadiene are recovered from C 4 -hydrocarbon mixture containing inter alia isobutylene and 0À01-60 wt. per cent butadiene by the following steps:- (a) contact at 25-35‹ C. with an absorption mixture containing 2-25 wt. per cent tert.- butanol, 30-45 wt. per cent sulphuric acid and 30-55 wt. per cent water, whereby isobutylene is hydrated to form more tert.-butanol, most of the butadiene being recovered as raffinate gas; (b) distilling the resulting mixture to obtain an azeotrope of tert.-butanol with about 12% of water; (c) fractionating the azeotrope to obtain a pure fraction comprising not more than 0À03 wt. per cent of impurities; and (d) dehydrating tert.-butanol contained in said pure fraction by contact with active alumina.

    7.
    发明专利
    未知

    公开(公告)号：DE1518553B1

    公开(公告)日：1970-03-26

    申请号：DE1518553

    申请日：1965-05-19

    Applicant: BASF AG

    Inventor： HANS-MARTIN WEITZ DR ,  FRANZ MERGER DR ,  JUERGEN KOOPMANN DR

    IPC: B01J19/00 ,  C01B7/09 ,  C25B1/24

    Abstract: 1,140,131. 1,4 - Dicyanobutene - (2). BADISCHE ANILIN- & SODA-FABRIK A.G. 18 May, 1966 [19 May, 1965], No. 22063/66. Heading C2C. [Also in Division C1] 1,4 - Dicyanobutene - (2) is obtained by reacting at an elevated temperature 1,2- dibromobutene-(3) and/or 1,4-dibromobutene- (2) with at least the stoichiometric amount of HCN in the presence of a copper salt in an aqueous acid medium at a pH of - 1 to + 3 using a buffer substance which exhibits buffering action in the said pH range as an acid acceptor, the acid acceptor being present in an amount of at least 1 equivalent per mole of dibromobutene, separating the resultant 1,4-dicyanobutene-(2) from the reaction mixture, oxidizing the HBr present in the aqueous solution to elementary Br 2 , separating Br 2 and returning the aqueous solution containing the acid acceptor to the reaction. The reaction may be carried out continuously or batchwise. The acid acceptors specified are alkali metal salts or alkaline earth salts of medium strength acids. The reaction solution may contain catalysts for the reoxidation of the bromine anions. Examples are given for the production of 1,4- dicyanobutene-(2) and an apparatus is described which is suitable for carrying out the continuous process.

    8.
    发明专利
    未知

    公开(公告)号：DE1443508A1

    公开(公告)日：1968-12-05

    申请号：DEB0075330

    申请日：1964-02-07

    Applicant: BASF AG

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

    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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