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1. 发明申请

US20140364659A1 PROCESS FOR THE CONVERSION OF ISOMERIC MIXTURE OF DICHLORODIPHENYL SULFONES TO CHLOROBENZENE 有权
标题翻译：二氯二苯醚等离子体混合物转化为氯仿的方法
公开(公告)号：US20140364659A1
公开(公告)日：2014-12-11
申请号：US14368955
申请日：2012-04-12
申请人： Hemant Ratanakar Bandodkar , Dilip Chandrakant Sawant
发明人： Hemant Ratanakar Bandodkar , Dilip Chandrakant Sawant
IPC分类号： C07C17/361
CPC分类号： C07C17/361 , C07C315/00 , C07C317/14 , C07C25/06
摘要： The invention relates to a process for the single step conversion of isomeric mixture of dichlorodipheriyi sulfones to chlorobenzene. The invention further relates a process of using dilute sulfuric acid and re-circulating the dilute sulfuric acid.
摘要翻译：本发明涉及一步法将二氯二苯代砜的异构体混合物转化为氯苯的方法。本发明还涉及使用稀硫酸并再循环稀硫酸的方法。

2. 发明授权

US09120717B2 Process for the conversion of isomeric mixture of dichlorodiphenyl sulfones to chlorobenzene 有权
标题翻译：将二氯二苯砜异构体混合物转化为氯苯的方法
公开(公告)号：US09120717B2
公开(公告)日：2015-09-01
申请号：US14368955
申请日：2012-04-12
申请人： Hemant Ratanakar Bandodkar , Dilip Chandrakant Sawant
发明人： Hemant Ratanakar Bandodkar , Dilip Chandrakant Sawant
IPC分类号： C07C17/00 , C07C17/361 , C07C315/00
CPC分类号： C07C17/361 , C07C315/00 , C07C317/14 , C07C25/06
摘要： The invention relates to a process for the single step conversion of isomeric mixture of dichlorodipheriyi sulfones to chlorobenzene. The invention further relates a process of using dilute sulfuric acid and re-circulating the dilute sulfuric acid.
摘要翻译：本发明涉及一步法将二氯二苯代砜的异构体混合物转化为氯苯的方法。本发明还涉及使用稀硫酸并再循环稀硫酸的方法。

3. 发明授权

US09340496B2 Process for the production of a sulfone monomer 有权
标题翻译：制备砜单体的方法
公开(公告)号：US09340496B2
公开(公告)日：2016-05-17
申请号：US13513399
申请日：2010-11-30
申请人： Hemant Ratanakar Bandodkar , Dilip Chandrakant Sawant
发明人： Hemant Ratanakar Bandodkar , Dilip Chandrakant Sawant
IPC分类号： C07C315/00 , C07C317/06
CPC分类号： C07C315/00 , C07C317/06 , C07C317/14
摘要： The present invention provides a method for the preparation of polymer grade 4,4′-dichlorodiphenyl sulfone in steps comprising reacting dimethyl sulfate and sulfur trioxide optionally containing a catalyst; reacting the formed dimethyl pyrosulfate with the unreacted sulfur trioxide optionally in the presence of a catalyst; reacting the reaction mixture with monochlorobenzene optionally containing a catalyst; optionally removing unreacted dimethyl sulfate; isolating crude 4,4′-dichlorodiphenyl sulfone using an organic solvent/organic solvent-water mixture; recovering the solvent from mother liquor; optionally recovering the isomeric mixture of dichlorodiphenyl sulfones from mother liquor; optionally, conversion of residual isomeric mixture of dichlorodiphenyl sulfones to a product selected from diphenyl sulfone, 2-aminodiphenyl sulfone; 2,4′-dihydroxydiphenyl sulfone, 4,4′-dihydroxydiphenyl sulfone; optionally recovering monochlorobenzene sulfonic acid and/or monochlorobenzene from the mother liquor; optionally recovering sulfuric acid from the residual liquor; optionally recycling the solvent; and purifying 4,4′-dichlorodiphenyl sulfone from crude followed by crystallization. Further the present invention discloses a process in which isomeric mixture of 4,4′-, 3,4′-, and 2,4′-dichlorodiphenyl sulfone produced during the preparation of 4,4′-dichlorodiphenyl sulfone is converted to value added products such as diphenyl sulfone, 2,4′-dihydroxydiphenyl sulfone, 4,4′-dihydroxydiphenyl sulfone and 2-aminodiphenyl sulfone.
摘要翻译：本发明提供了一种制备聚合物级4,4'-二氯二苯砜的方法，包括使任选含有催化剂的硫酸二甲酯和三氧化硫反应; 任选地在催化剂存在下使形成的焦硫酸二甲酯与未反应的三氧化硫反应; 将反应混合物与任选含有催化剂的单氯苯反应; 任选地除去未反应的硫酸二甲酯; 使用有机溶剂/有机溶剂 - 水混合物分离粗制4,4'-二氯二苯砜; 从母液中回收溶剂; 任选地从母液中回收二氯二苯砜的异构体混合物; 任选地，将二氯二苯基砜的残余异构体混合物转化成选自二苯基砜，2-氨基二苯基砜的产物; 2,4'-二羟基二苯砜，4,4'-二羟基二苯砜; 任选地从母液中回收一氯苯磺酸和/或一氯苯; 任选地从残余液中回收硫酸; 任选地再循环溶剂; 并从粗品中纯化4,4'-二氯二苯基砜，然后结晶。此外，本发明公开了一种方法，其中在制备4,4'-二氯二苯砜期间产生的4,4'-，3,4'-和2,4'-二氯二苯砜的异构体混合物转化为增值产物如二苯基砜，2,4'-二羟基二苯基砜，4,4'-二羟基二苯基砜和2-氨基二苯基砜。

4. 发明申请

US20120302795A1 PROCESS FOR THE PRODUCTION OF A SULFONE MONOMER 审中-公开
标题翻译：生产SULFONE MONOMER的方法
公开(公告)号：US20120302795A1
公开(公告)日：2012-11-29
申请号：US13513399
申请日：2010-11-30
申请人： Hemant Ratanakar Bandodkar , Dilip Chandrakant Sawant
发明人： Hemant Ratanakar Bandodkar , Dilip Chandrakant Sawant
IPC分类号： C07C315/06
CPC分类号： C07C315/00 , C07C317/06 , C07C317/14
摘要： The present invention provides a method for the preparation of polymer grade 4,4′-dichlorodiphenyl sulfone in steps comprising reacting dimethyl sulfate and sulfur trioxide optionally containing a catalyst; reacting the formed dimethyl pyrosulfate with the unreacted sulfur trioxide optionally in the presence of a catalyst; reacting the reaction mixture with monochlorobenzene optionally containing a catalyst; optionally removing unreacted dimethyl sulfate; isolating crude 4,4′-dichlorodiphenyl sulfone using an organic solvent/organic solvent-water mixture; recovering the solvent from mother liquor; optionally recovering the isomeric mixture of dichlorodiphenyl sulfones from mother liquor; optionally, conversion of residual isomeric mixture of dichlorodiphenyl sulfones to a product selected from diphenyl sulfone, 2-aminodiphenyl sulfone; 2,4′-dihydroxydiphenyl sulfone, 4,4′-dihydroxydiphenyl sulfone; optionally recovering monochlorobenzene sulfonic acid and/or monochlorobenzene from the mother liquor; optionally recovering sulfuric acid from the residual liquor; optionally recycling the solvent; and purifying 4,4′-dichlorodiphenyl sulfone from crude followed by crystallization. Further the present invention discloses a process in which isomeric mixture of 4,4′-, 3,4′-, and 2,4′-dichlorodiphenyl sulfone produced during the preparation of 4,4′-dichlorodiphenyl sulfone is converted to value added products such as diphenyl sulfone, 2,4′-dihydroxydiphenyl sulfone, 4,4′-dihydroxydiphenyl sulfone and 2-aminodiphenyl sulfone.
摘要翻译：本发明提供了一种制备聚合物级4,4'-二氯二苯砜的方法，包括使任选含有催化剂的硫酸二甲酯和三氧化硫反应; 任选地在催化剂存在下使形成的焦硫酸二甲酯与未反应的三氧化硫反应; 将反应混合物与任选含有催化剂的单氯苯反应; 任选地除去未反应的硫酸二甲酯; 使用有机溶剂/有机溶剂 - 水混合物分离粗制4,4'-二氯二苯砜; 从母液中回收溶剂; 任选地从母液中回收二氯二苯砜的异构体混合物; 任选地，将二氯二苯基砜的残余异构体混合物转化成选自二苯基砜，2-氨基二苯基砜的产物; 2,4'-二羟基二苯砜，4,4'-二羟基二苯砜; 任选地从母液中回收一氯苯磺酸和/或一氯苯; 任选地从残余液中回收硫酸; 任选地再循环溶剂; 并从粗品中纯化4,4'-二氯二苯基砜，然后结晶。此外，本发明公开了一种方法，其中在制备4,4'-二氯二苯砜期间产生的4,4'-，3,4'-和2,4'-二氯二苯砜的异构体混合物转化为增值产物如二苯基砜，2,4'-二羟基二苯基砜，4,4'-二羟基二苯基砜和2-氨基二苯基砜。

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