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    Continuous production of esters of glycols or their monoethers with lower fatty acids
    2.
    发明授权
    Continuous production of esters of glycols or their monoethers with lower fatty acids 失效
    连续生产二醇或其单醚与低级脂肪酸的酯

    公开(公告)号：US3923874A

    公开(公告)日：1975-12-02

    申请号：US36732773

    申请日：1973-06-06

    Applicant: BASF AG

    Inventor： HOHENSCHUTZ HEINZ ,  HORNBERGER PAUL ,  GNAD JOSEF ,  DINKHAUSER GUENTER

    IPC: C07C69/02 ,  B01J27/00 ,  B01J31/00 ,  C07B61/00 ,  C07C67/08

    CPC classification number: C07C67/08 ,  C07C69/08

    Abstract: Continuous production of substantially or wholly water-soluble esters of glycols or their monoethers with lower fatty acids by reaction of a glycol of the formula (I): HO-A-X (I) in which A is ethylene, propylene or butylene; and X is OH or OR in which R is alkyl of one to four carbon atoms or OAOH or OAOR in which A and R have the meanings given above with a lower saturated fatty acid at elevated temperature in the presence of a catalytic amount of a strong acid while continuously removing the water formed by means of an entrainer followed by treatment with an aqueous alkali. The glycol of the formula (I) is reacted in a first zone with the lower fatty acid, the water formed being distilled off as an azeotrope over the top by means of an entrainer, and the crude glycol ester including the entrainer is removed from the bottoms, mixes with an aqueous alkali, extracted in a second zone while supplying an extractant and water with phase separation and in a third zone the pure glycol ester is recovered from the resulting mixture of glycol ester, entrainer and extractant by rectification. Glycol esters are used as solvents for surface coating agents.

    Abstract translation: 通过式（I）的二元醇：其中A是乙烯，丙烯或丁烯的HO-A-X（I）的反应连续生产二醇或其单醚与低级脂肪酸的基本上或完全水溶性的酯; 并且X是OH或OR，其中R是1-4个碳原子的烷基或OAOH或OAOR，其中A和R在较高饱和脂肪酸中具有上述含义，在催化剂量的强度存在下， 同时连续除去通过夹带剂形成的水，然后用碱水溶液处理。 式（I）的二醇在第一区域与低级脂肪酸反应，形成的水通过夹带剂在顶部作为共沸物蒸馏出来，并将包含夹带剂的粗乙醇酯从 底部，与碱水溶液混合，在第二区域中提取，同时提供萃取剂和进行相分离的水，在第三区域，通过精馏从所得到的乙二醇酯，夹带剂和萃取剂的混合物中回收纯乙二醇酯。 乙二醇酯用作表面涂层剂的溶剂。

    MANUFACTURE OF PHTHALIC ANHYDRIDE FROM O-XYLENE OR NAPHTHALENE
    4.
    发明专利
    MANUFACTURE OF PHTHALIC ANHYDRIDE FROM O-XYLENE OR NAPHTHALENE 未知

    公开(公告)号：CA1053248A

    公开(公告)日：1979-04-24

    申请号：CA262962

    申请日：1976-10-07

    Applicant: BASF AG

    Inventor： BLECHSCHMITT KURT ,  REUTER PETER ,  WIRTH FRIEDRICH ,  HORNBERGER PAUL

    IPC: C07D307/89 ,  B01J23/00 ,  B01J27/00 ,  C07C51/265 ,  C07C51/31

    Abstract: A process for the manufacture of phthalic anhydride by oxidizing o-xylene and/or naphthalene over a supported catalyst containing vanadium pentoxide and titanium dioxide, at from 350.degree. to 500.degree.C, in which the o-xylene or naphthalene is passed, with an oxygen-containing carrier gas, over the catalyst, and in which the catalyst in the first 25-50 per cent by volume of the total catalyst volume, in the direction of flow of the mixture of .alpha.-xylene or naphthalene and carrier gas, containe from 0.001 to 0.3 per cent by weight, based on titanium dioxide, of rubidium, but no phosphorus, in the active composition, whilst the remainder of the catalyst contains from 0.02 to 0.8 per cent by weight, based on titanium dioxide, of phosphorus, but no rubidium, in the active composition.

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