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    Purification of terephthalic acid
    7.
    发明专利
    Purification of terephthalic acid 未知

    公开(公告)号：GB906218A

    公开(公告)日：1962-09-19

    申请号：GB304461

    申请日：1961-01-26

    Applicant: BASF AG

    Inventor： MOELL HANS ,  KREYER ADOLF ,  SOENKSEN HANS

    Abstract: Terephthalic acid purified by recrystallisation from an organic solvent by dissolving the acid at 50-250 DEG C., cooling the solution and separating the precipitated acid, the solvent being a lactone containing 5-9 ring atoms, a nitrogen free cyclic ether containing 5-6 ring atoms or a nitrogen free substituted derivative thereof or a mixture of water and at least one of the aforementioned solvents. The purification is applicable to an acid obtained by any method, particularly to acid obtained by nitric acid or air oxidation of disubstituted benzenes. Solvents p mentioned are butyric, valeric, caproic and caprylic lactones and furans, pyrans, dioxans and their alkoxy, hydroxy and methyl substituted derivatives. The preferred solvents are the aqueous mixtures containing approximately equimolar proportions. The crude acid is preferably dissolved in about 15-40 parts by weight of solvent by heating to reflux, the hot solution treated with activated carbon and the purified acid precipitated, if necessary after concentration and addition of numeral acids. Examples are given.

    A process for the production of 2-halogencycloheptene-(1)-carboxylic acids-(1)
    8.
    发明专利
    A process for the production of 2-halogencycloheptene-(1)-carboxylic acids-(1) 未知

    公开(公告)号：GB876121A

    公开(公告)日：1961-08-30

    申请号：GB2687759

    申请日：1959-08-06

    Applicant: BASF AG

    Inventor： MOELL HANS ,  KUTEPOW NIKOLAUS VON

    Abstract: The invention comprises 2-chlor-cycloheptene-(1)-carboxylic acid-(1) and a process for the production of 2-halogen-cycloheptene-(1)-carboxylic acids-(1) wherein a 2.2.8-trihalogen-cyclo-octanone-(1)- is reacted with an aqueous, aqueous alcoholic, alcoholic, or phenolic solution of at least 3 mols of an alkali metal hydroxide per mol of trihalogencyclooctanone and the 2-halogencycloheptene-(1)-carboxylic acid-(1) is set free by acidification of the reaction mixture with a mineral acid. Alkali metal hydroxides specified include sodium and potassium hydroxides. Soluents specified include alkanols with from 1 to 4 carbon atoms, cycloaliphatic with from 5 to 8 ring carbon atoms, aromatic alcohols such as benzyl alcohols, and o-cresol. Suberone is obtained as a by-product in the process and may also be obtained by treating the halogen cycloheptene-carboxylic acid with alkali metal hydroxide and decarboxylating the product. 2-brom-and 2-chlorcycloheptene-(1) carboxylic acids-(1) are pharmaceuticals which increase the flow of bile. Examples are furnished. 2.2.8-Tribrom-cyclo-octanone-(1) is prepared by reacting cyclo-octanone with bromine in carbon tetrachloride solution. 2.2.8-Trichloro-cyclo-octanone-(1) is prepared by passing chlorine into a solution of cyclo-octanone in chloroform. Specification 797,184 is referred to.

    Nickel catalyst
    10.
    发明专利
    Nickel catalyst 未知

    公开(公告)号：GB1085171A

    公开(公告)日：1967-09-27

    申请号：GB265

    申请日：1965-01-01

    Applicant: BASF AG

    Inventor： LANDGRAF ALFRED ,  MOELL HANS ,  KERBER HORST ,  WODTCKE FRIEDRICH ,  EBENHOECH FRANZ LUDWIG ,  HUPPER LEOPOLD

    IPC: B01J23/883 ,  C07C45/50

    Abstract: Ni-containing sodium molybdate/SiO2 catalysts are used to hydrogenate sulphur-containing mixtures of aldehydes, ketenes and esters such as are obtained in oxo systheses from olefins, CO and H2. In example 3 a feed stream containing inter alia n-butyhaladehyde, isobutyraldehyde, butyl formates and butyene esters is hydrogenated, the aldehydes and substantial portions of the esters being converted to the corresponding butanols.ALSO:In a method of making Ni-containing hydrogenation catalysts, an aqueous solution which is 0.5 to 3 molar in Si and having a ratio Na:Si of 0.7 to 7:1 and a Mo:Si ratio of 0.04 to 0.2:1 which has been prepared from water-glass and sodium molybdate has added to it while stirring such an amount of a 1 to 3 molar Mi salt solution that the amount of Mi added is from 10% by weight more or less equivalent to the amount of sodium contained in the solution and the resultant precipitate is separated from the solution, moulded and reduced in hydrogen at 300 to 500 DEG C. Additionally the catalyst may contain a small quantity of magnesium.

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