公开(公告)号：US5912385A

公开(公告)日：1999-06-15

申请号：US9449

申请日：1998-01-20

申请人： Kazuyoshi Kushibe ,  Hiromitsu Kobayashi ,  Hirohisa Nitoh ,  Hirotsugu Kitamura

发明人： Kazuyoshi Kushibe ,  Hiromitsu Kobayashi ,  Hirohisa Nitoh ,  Hirotsugu Kitamura

IPC分类号： B01J41/04 ,  C07C303/16 ,  C07C303/44 ,  C07C309/04 ,  C07C309/08 ,  C07C303/00

CPC分类号： C07C303/16

摘要： This invention relates to a process for the production of an alkanesulfionic acid such as isethionic acid with a high purity in a high yield and at a low cost by oxidation of a (hydroxy)alkylmercaptan with hydrogen peroxide characterized in that a whole amount beyond a stoichiometric amount of a solution of hydrogen peroxide having a H.sub.2 O.sub.2 concentration of not less than 50% by weight is charged into a reaction vessel, said mercaptan is continuously fed at a temperature of 50.degree. C. or lower, aging is carried out, distillation with boiling is carried out and then the reaction mixture is contacted with an anion exchanger.

摘要翻译： 本发明涉及通过用（过氧化氢）氧化（羟基）烷基硫醇，以高产率和低成本生产高纯度的烷硫磺酸如羟乙磺酸的方法，其特征在于超过化学计量 将H 2 O 2浓度不低于50重量％的过氧化氢溶液的量加入到反应容器中，所述硫醇在50℃以下的温度下连续进料，进行熟化，煮沸蒸馏 然后使反应混合物与阴离子交换剂接触。

公开(公告)号：US4382147A

公开(公告)日：1983-05-03

申请号：US300502

申请日：1981-09-09

申请人： Hirotsugu Kitamura ,  Yasumasa Shimizu ,  Osami Ohura

发明人： Hirotsugu Kitamura ,  Yasumasa Shimizu ,  Osami Ohura

IPC分类号： C07C67/00 ,  C07C313/00 ,  C07C315/06 ,  C07C317/22 ,  C07C147/10

CPC分类号： C07C315/06

摘要： 4,4'-Dihydroxydiphenyl sulfone is isolated from a mixture of dihydroxydiphenyl sulfone isomers by heat dissolving the mixture in phenol and then cooling the resulting solution thereby allowing 4,4'-dihydroxydiphenyl sulfone to precipitate as an adduct with phenol.

摘要翻译： 通过将混合物热溶解在苯酚中然后冷却所得溶液从4,4'-二羟基二苯砜的混合物中分离出4,4'-二羟基二苯砜，从而使4,4'-二羟基二苯砜与苯酚加合沉淀。