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    Production of carboxylic acid esters of tertiary alcohols
    2.
    发明专利
    Production of carboxylic acid esters of tertiary alcohols 未知

    公开(公告)号：GB934917A

    公开(公告)日：1963-08-21

    申请号：GB1157462

    申请日：1962-03-27

    Applicant: BASF AG

    Inventor： SOENKSEN HANS ,  BAUMEISTER WILHELM ,  UMLAUF ERICH

    IPC: C07C69/04 ,  C07C69/14 ,  C07C69/22 ,  C07C69/24 ,  C07C69/38 ,  C07C69/54 ,  C08F220/18

    Abstract: Carboxylic acid esters of tertiary alcohols are prepared by reacting an isoolefine with a carboxylic acid having one to five carbon atoms and boiling at between 100 DEG and 200 DEG C. in the presence of a difficulty volatile strong acid having an equilibrium pressure of 1 atmosphere above 200 DEG C. as a catalyst, distilling the complete reaction mixture under reduced pressure and recovering the ester from the more readily volatile fraction. The distillation is preferably carried out at between 0,1 and 100 mm. Hg. pressure. The process may be continuous and the more difficulty volatile fraction containing the acid and the isoolefine from the more volatile fraction returned to the reaction zone. The amount of isoolefine in the reaction zone may be 60 to 95% of the theoretical amount. Suitable carboxylic acids include, formic, acetic, propionic, butyric, isobutyric, isovaleric, acrylic, methacrylic, chloracetic, a -chloracrylic acids. Isoolefines may be 2-methylbutene-(1), 2-methylbutene(2), isobutene. Suitable acid catalysts include sulphuric acid, chlorosulphonic acid, p-toluene sulphonic acid.

    3.
    发明专利
    未知

    公开(公告)号：FR1318496A

    公开(公告)日：1963-02-15

    申请号：FR892641

    申请日：1962-03-29

    Applicant: BASF AG

    Inventor： SOENKSEN HANS ,  BAUMEISTER WILHELM ,  UMLAUF ERICH

    IPC: C07C69/04 ,  C07C69/14 ,  C07C69/22 ,  C07C69/24 ,  C07C69/38 ,  C07C69/54 ,  C08F220/18

    Abstract: Carboxylic acid esters of tertiary alcohols are prepared by reacting an isoolefine with a carboxylic acid having one to five carbon atoms and boiling at between 100 DEG and 200 DEG C. in the presence of a difficulty volatile strong acid having an equilibrium pressure of 1 atmosphere above 200 DEG C. as a catalyst, distilling the complete reaction mixture under reduced pressure and recovering the ester from the more readily volatile fraction. The distillation is preferably carried out at between 0,1 and 100 mm. Hg. pressure. The process may be continuous and the more difficulty volatile fraction containing the acid and the isoolefine from the more volatile fraction returned to the reaction zone. The amount of isoolefine in the reaction zone may be 60 to 95% of the theoretical amount. Suitable carboxylic acids include, formic, acetic, propionic, butyric, isobutyric, isovaleric, acrylic, methacrylic, chloracetic, a -chloracrylic acids. Isoolefines may be 2-methylbutene-(1), 2-methylbutene(2), isobutene. Suitable acid catalysts include sulphuric acid, chlorosulphonic acid, p-toluene sulphonic acid.

    Improvements in the production of chloralkylammonium chlorides
    4.
    发明专利
    Improvements in the production of chloralkylammonium chlorides 未知

    公开(公告)号：GB872284A

    公开(公告)日：1961-07-05

    申请号：GB3042359

    申请日：1959-09-07

    Applicant: BASF AG

    Inventor： SOENKSEN HANS ,  STANGER HANS ,  PALM ALBERT ,  SCHMIDT JOSEPH

    Abstract: Chloralkylammonium chlorides are prepared by treating a mixture of an alkanolamine (40-86% by weight) and water at elevated temperature e.g. between 150 and 180 DEG C., and pressure in the presence of not more than 40%, based on the reaction mixture, of hydrogen chloride. Ethanolamine, di- and triethanolamines, isopropanolamine, 2-dimethylaminoethanol, 2-methylaminocyclohexanol, 2-phenylethanolamine, 3 - aminopropanol, 4 - aminobutanol and 4-aminocyclohexanol are specified and the reaction may be batchwise or continuous. A dehydration catalyst such as sulphuric or phosphoric acid, zinc chloride or aluminium phosphate may be included. Chloralkylamines may be obtained by the addition of a base. Specification 468,387 is referred to.

    Purification of terephthalic acid
    6.
    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.

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