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    Isomerization of isopropyl naphthalene
    1.
    发明授权
    Isomerization of isopropyl naphthalene 失效
    异丙基萘的异构化

    公开(公告)号：US3845149A

    公开(公告)日：1974-10-29

    申请号：US35640673

    申请日：1973-05-02

    Applicant: HOECHST AG

    Inventor： PIETZSCH S ,  WIRTZ R ,  SCHAEFFER G

    IPC: C07C5/22 ,  B01J27/00 ,  B01J31/00 ,  C07B61/00 ,  C07C1/00 ,  C07C5/27 ,  C07C15/24 ,  C07C67/00 ,  C07C5/28

    CPC classification number: C07C5/2751 ,  C07C5/2759 ,  Y10S585/954 ,  C07C15/24

    Abstract: 1. A PROCESS FOR THE ISOMERIZATION OF A-ISOPROPYLNAPHTHALENE TO B-ISOPROPYL NAPHTHALENE WITH AN ALUMINIUM CHLORIDE IN AMOUNTS OF 0.05 TO 0.8% BY WEIGHT ALUMINUM CHLORIDE IN AMOUNTS OF 0.05 TO 0.8% BY WEIGHT OR ETHYL ALUMINUM DICHLORIDE IN AMOUNTS OF 0.5 TO 1.5% BY WEIGHT OR A MIXTURE THEREOF, EACH CALCULATED ON THE TOTAL QUANTITY OF THE INITIAL ALKYLATED NAPHTHALENE, THE PORTION OF THE B-ISOMERIC MONO - ISOPROPYL NAPHTHALENE BEING AT LEAST 92%, CALCULATED ON THE TOTAL MONO-ISOMER PORTION AND THE TOTAL PORTION OF THE MONO-ISOPROPYL-NAPHTHALENE EXCEEDING 70% BY WEIGHT, CALCULATED ON THE TOTAL AMOUNT OF ALKYLATED NAPHTHALENES, AT A TEMPERATURE OF FROM 40 TO 200* C.

    Process for the manufacture of aromatic isocyanates using oxyethylate catalysts
    2.
    发明授权
    Process for the manufacture of aromatic isocyanates using oxyethylate catalysts 失效
    使用乙酸乙烯酯催化剂制备芳族异氰酸酯的方法

    公开(公告)号：US3835172A

    公开(公告)日：1974-09-10

    申请号：US21738472

    申请日：1972-01-12

    Applicant: HOECHST AG

    Inventor： ARNDT O ,  SEMLER G ,  SCHAEFFER G

    IPC: C07C265/12 ,  C07C119/04

    CPC classification number: C07C263/10 ,  C07C265/12 ,  C07C265/14

    Abstract: Improved process for the preparation of aromatic isocyanates by reaction of phosgene with primary aromatic amines or their salts in a suspension in an inert solvent, in which the reaction is carried out in the presence of catalytic amounts of a compound containing at least 6 polyethylene oxide groups in one chain. By the addition of said compound the required amount of phosgene is reduced, the reaction proceeds faster and the isocyanates are obtained in higher yields.

    Abstract translation: 通过光气与伯芳香胺或其盐在惰性溶剂中的悬浮液中反应来制备芳族异氰酸酯的改进方法，其中反应在催化量的含有至少6个聚环氧乙烷基团的化合物存在下进行 在一个链。 通过加入所述化合物，所需量的光气减少，反应进行得更快，以更高的产率获得异氰酸酯。

    5.
    发明专利
    未知

    公开(公告)号：BR7907679A

    公开(公告)日：1980-07-22

    申请号：BR7907679

    申请日：1979-11-27

    Applicant: HOECHST AG

    Inventor： SPIELMANN W ,  SCHAEFFER G

    IPC: C07C45/45 ,  C07C45/75 ,  C07C49/00 ,  C07C69/76 ,  C07D307/46 ,  C07D333/16 ,  C07D333/22 ,  C07C45/15

    Abstract: Ketones are prepared by reacting carboxylic acid halides, in particular carboxylic acid chlorides, with aluminum-alkyl compounds, optionally in the presence of an aluminum trihalide, in methylene chloride as the solvent, at a temperature between about 20 DEG and about 100 DEG C., preferably between about 30 DEG and about 60 DEG C., more preferably of about 40 DEG C. which is the reflux temperature of the methylene chloride. When operating at a temperature above approximately 40 DEG C., pressure higher than atmospheric is applied. The reaction mixture is worked up in usual manner, suitably by decomposition with water followed by distillation.

    8.
    发明专利
    未知

    公开(公告)号：BR8100243A

    公开(公告)日：1981-08-04

    申请号：BR8100243

    申请日：1981-01-16

    Applicant: HOECHST AG

    Inventor： SCHAEFFER G ,  SPIELMANN W

    IPC: C07C59/52 ,  C07C51/00 ,  C07C51/377 ,  C07C67/00 ,  C07C53/08

    Abstract: p-Hydroxyphenylacetic acid is prepared by reduction of p-hydroxymandelic acid with HI in the presence of red phosphorus. According to a preferred embodiment, the reaction is carried out in one vessel in which the mandelic acid is prepared in situ from phenol and glyoxylic acid.

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