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67 条记录 (耗时 0.022 秒)

    Process for stabilizing propanesultone
    4.
    发明授权
    Process for stabilizing propanesultone 失效
    稳定丙酮的方法

    公开(公告)号：US3829438A

    公开(公告)日：1974-08-13

    申请号：US23699472

    申请日：1972-03-22

    申请人： DAICEL LTD

    发明人： IKEGAMI A ,  MORITA H

    IPC分类号： C07D327/04 ,  C07D89/06

    CPC分类号： C07D327/10

    摘要： PROPANESULTONE IS STABILIZED BY ADDING AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC AMINES, ALICYCLIC AMINES, ARALKYLAMINES, NON-AROMATIC CYCLIC AMINES, N-ALKYL-SUBSTITUTED AROMATIC AMINES, AMINOALCOHOLS AMINE CHARACTER NITROGEN CONTAINING CARBOXYLIC ACIDS HAVING 2 TO 10 CARBON ATOMS AND THEIR ESTERS, AMIDES, PYRIDINES, QUINOLINES, AND REACTION PRODUCTS OF THESE COMPOUNDS WITH PROPANESULTONE.

    Process for manufacturing propane sultone
    5.
    发明授权
    Process for manufacturing propane sultone 失效
    制造丙二醇的方法

    公开(公告)号：US3824253A

    公开(公告)日：1974-07-16

    申请号：US21322071

    申请日：1971-12-28

    申请人： DAICEL LTD

    发明人： UEMATSU E ,  ISHII K ,  TSUJI K ,  MAEHARA M ,  TAKAHASHI H

    IPC分类号： C07D327/04 ,  C07D331/04 ,  C07D89/06

    CPC分类号： C07D331/04

    摘要： A PROCESS FOR PREPARING PROPANE SULTONE FROM A HYDROXYPROPANE SULFONIC ACID CONTAINING SOLUTION WHICH IS CHARACTERIZED BY CONCENTRATING THE SOLUTION UNTIL THE CONCENTRATION RATIO WITHIN A SPECIFIC RANGE IS REACHED AND THEN SUBJECTING THE OBTAINED CONCENTRATED SOLUTION TO A CONTINUOUS DISTILLATION IN AN AGITATED-FILM EVAPORATOR UNDER A HIGH VACUUM OF LOWER THAN 15 MM. HG TO DISTILL AND RECOVER PROPANE SULTONE.

    Process for production of styrene/acrylonitrile copolymers
    8.
    发明授权
    Process for production of styrene/acrylonitrile copolymers 失效
    苯乙烯/丙烯腈共聚物的生产方法

    公开(公告)号：US3738972A

    公开(公告)日：1973-06-12

    申请号：US3738972D

    申请日：1971-08-26

    申请人： DAICEL LTD

    发明人： MORIYAMA K ,  TAKAHASHI S

    IPC分类号： C08F2/00 ,  C08F2/18 ,  C08F212/00 ,  C08F212/10 ,  C08F15/04 ,  C08F15/22

    CPC分类号： C08F212/10

    摘要： SUSPENSION POLYMERIZATION OF A STYRENE-ACRYLONITRILE POLYMERIZATION MIXTURE IS CARRIED OUT WHILE ADDING STYRENE TO THE POLYMERIZATION MIXTURE UNTIL THE CONVERSION OF MONOMERS TO COPOLYMER REACHES 40 TO 70%. AN INERT GAS IS PASSED THROUGH THE POLYMERIZATION SYSTEM AFTER THE CONVERSION HAS REACHED 75 TO 85% TO REMOVE EXCESS ACRYLONITRILE, WHEREBY THERE IS OBTAINED A STYRENE-ACRYLONITRILE COPOLYMER HAVING A UNIFORM HOMOGENOUS COMPOSITION.

    Process for manufacturing 3,3,5-trimethylcyclohexyl mandelate
    9.
    发明授权
    Process for manufacturing 3,3,5-trimethylcyclohexyl mandelate 失效
    制备3,3,5-三甲基环己酮的方法

    公开(公告)号：US3673239A

    公开(公告)日：1972-06-27

    申请号：US3673239D

    申请日：1970-12-10

    申请人： DAICEL LTD

    发明人： TAKAHASHI HIROSHI

    IPC分类号： C07C69/732 ,  C07C69/76

    CPC分类号： C07C69/76

    摘要： A process for manufacturing 3,3,5-trimethylcyclohexyl mandelate in which mandelic acid is esterified with 3,3,5trimethylcyclohexanol in an inert solvent in the presence of an acid catalyst, in which a metal (Zn, Sn, Mg, Ni or Pb) is added to the reaction system at the beginning of or during the reaction, or afterwards, to generate ketone-reductive hydrogen in situ in order to minimize formation of 3,3,5trimethylcyclohexylphenylglyoxylate.

    摘要翻译： 制备3,3,5-三甲基环己基扁桃酸酯的方法，其中扁桃酸在3,3,5-三甲基环己醇的惰性溶剂中在酸催化剂存在下酯化，其中金属（Zn，Sn，Mg，Ni 或Pb）在反应开始或反应期间或之后加入到反应体系中，以便原位生成酮还原氢，以最小化3,3,5-三甲基环己基苯基乙醛酸酯的形成。