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163 条记录 (耗时 0.021 秒)

    Method for preparing 3-ethylbenzophenone
    9.
    发明授权
    Method for preparing 3-ethylbenzophenone 失效
    3-乙基二苯甲酮的制备方法

    公开(公告)号：US4734528A

    公开(公告)日：1988-03-29

    申请号：US904473

    申请日：1986-09-08

    申请人： Isoo Shimizu ,  Yasuo Matsumura ,  Atsushi Sato

    发明人： Isoo Shimizu ,  Yasuo Matsumura ,  Atsushi Sato

    IPC分类号： C07C49/784 ,  B01J27/00 ,  C07B61/00 ,  C07C2/68 ,  C07C45/00 ,  C07C45/27 ,  C07C45/28 ,  C07C45/64 ,  C07C45/82 ,  C07C45/85 ,  C07C51/12 ,  C07C67/00

    CPC分类号： C07C45/85 ,  C07C2/68 ,  C07C45/28 ,  C07C45/64 ,  C07C45/82 ,  C07C51/12 ,  C07C2527/126

    摘要： The present invention provides a method for preparing 3-ethylbenzophenone in a high purity which comprises the steps of alkylating benzene with ethylene in the presence of an alkylating catalyst to obtain an alkylated product composed mainly of unreacted benzene, ethylbenzene, polyethylbenzenes and heavier substances; subjecting the alkylated product to rectification in order to recover therefrom a fraction which has a temperature range of boiling points within the range of 275.degree. to 310.degree. C. (in terms of atmospheric pressure); heating the recovered fraction together with a mixture of nitric acid and water; carrying out purification, if necessary; and performing distillation to recover therefrom 3-ethylbenzophenone represented by the formula (I): ##STR1##

    摘要翻译： 本发明提供了一种制备高纯度3-乙基二苯甲酮的方法，包括在烷基化催化剂存在下用乙烯烷基化苯，得到主要由未反应的苯，乙苯，聚乙基苯和较重物质组成的烷基化产物; 对烷基化产物进行精馏以从其中回收沸点温度范围在275〜310℃（按大气压）的馏分。 将回收的馏分与硝酸和水的混合物一起加热; 进行净化，必要时; 并进行蒸馏以从其中回收由式（I）表示的3-乙基二苯甲酮：（I）

    Method for producing .alpha.-(p-isobutylphenyl)propionic acid or its alkyl esters
    10.
    发明授权
    Method for producing .alpha.-(p-isobutylphenyl)propionic acid or its alkyl esters 失效
    α-（对异丁基苯基）丙酸或其烷基酯的制备方法

    公开(公告)号：US4694100A

    公开(公告)日：1987-09-15

    申请号：US753403

    申请日：1985-07-10

    申请人： Isoo Shimizu ,  Ryotaro Hirano ,  Yasuo Matsumura ,  Hideki Nomura ,  Kazumichi Uchida ,  Atsushi Sato

    发明人： Isoo Shimizu ,  Ryotaro Hirano ,  Yasuo Matsumura ,  Hideki Nomura ,  Kazumichi Uchida ,  Atsushi Sato

    IPC分类号： C07C4/00 ,  C07C45/50 ,  C07C51/14 ,  C07C51/29 ,  C07C67/38

    CPC分类号： C07C51/14 ,  C07C4/00 ,  C07C45/50 ,  C07C51/29 ,  C07C2521/12 ,  C07C2521/16 ,  C07C2527/054 ,  C07C2527/173 ,  C07C2529/04 ,  C07C2531/025 ,  Y02P20/582

    摘要： A method for producing .alpha.-(p-isobutylphenyl)propionic acid or its alkyl esters which is characterized in that starting materials are inexpensive, processes are easy to be done and products are highly pure. The method comprises the steps of (I): catalytically cracking 1,1-bis(p-isobutylphenyl)ethane at temperatures in the range of 200.degree. to 650.degree. C. in the presence of a protonic acid catalyst and/or a solid acid catalyst to produce isobutylbenzene and p-isobutylstyrene; and (II): reacting said p-isobutylstyrene with carbon monoxide and water or alcohol at temperatures in the range of 40.degree. to 150.degree. C. in the presence of a metal complex carbonylation catalyst to produce .alpha.-(p-isobutylphenyl)propionic acid or its alkyl ester; or (III): reacting said p-isobutylstyrene with carbon monoxide and hydrogen at temperatures in the range of 40.degree. to 150.degree. C. in the presence of a metal complex carbonylation catalyst to produce .alpha.-(p-isobutylphenyl)propionaldehyde and then oxidizing said .alpha.-(p-isobutylphenyl)propionaldehyde to produce .alpha.-(p-isobutylphenyl)propionic acid. The recovered isobutylene is recycled to produce 1,1-bis(p-isobutylphenyl)ethane by reaction with acetaldehyde in the presence of sulfuric acid.

    摘要翻译： 一种生产α-（对异丁基苯基）丙酸或其烷基酯的方法，其特征在于起始材料便宜，方法易于进行，产物是高纯度的。 该方法包括以下步骤：（I）：在质子酸催化剂和/或固体酸存在下，在200至650℃的温度范围内催化裂化1,1-双（对异丁基苯基）乙烷 催化剂生产异丁苯和对异丁基苯乙烯; 和（II）：在金属络合物羰基化催化剂存在下，使所述对异丁基苯乙烯与一氧化碳和水或醇在40-150℃的温度下反应，得到α-（对异丁基苯基）丙酸 或其烷基酯; 或（III）：在金属络合物羰基化催化剂存在下，使所述对异丁基苯乙烯与一氧化碳和氢气在40-150℃的温度下反应，生成α-（对异丁基苯基）丙醛，然后氧化 所述α-（对异丁基苯基）丙醛生成α-（对异丁基苯基）丙酸。 通过在硫酸存在下与乙醛反应，回收的异丁烯被再循环以产生1,1-双（对异丁基苯基）乙烷。