Invention Grant
US08853444B2 Processes for preparing 4-chlorobenzenesulfonic acid and 4,4′-dichlorodiphenyl sulfone
有权
制备4-氯苯磺酸和4,4'-二氯二苯砜的方法
- Patent Title: Processes for preparing 4-chlorobenzenesulfonic acid and 4,4′-dichlorodiphenyl sulfone
- Patent Title (中): 制备4-氯苯磺酸和4,4'-二氯二苯砜的方法
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Application No.: US13041536Application Date: 2011-03-07
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Publication No.: US08853444B2Publication Date: 2014-10-07
- Inventor: Patrick Deck , Heiner Schelling , Florian Garlichs
- Applicant: Patrick Deck , Heiner Schelling , Florian Garlichs
- Applicant Address: DE
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE
- Agency: Drinker Biddle & Reath LLP
- Main IPC: C07C315/00
- IPC: C07C315/00 ; C07C303/22
Abstract:
Processes for preparing 4-chlorobenzenesulfonic acid from 2-chlorobenzenesulfonic acid and/or 3-chlorobenzenesulfonic acid, which processes include the conversion of 2-chlorobenzenesulfonic acid and/or 3-chlorobenzenesulfonic acid to 4-chlorobenzenesulfonic acid in the presence of sulfuric acid at a temperature of 100 to 300° C.; as well as processes for preparing 4,4′-dichlorodiphenyl sulfone, which include such described processes for preparing 4-chlorobenzenesulfonic acid.
Public/Granted literature
- US20110218357A1 PROCESSES FOR PREPARING 4-CHLOROBENZENESULFONIC ACID AND 4,4'-DICHLORODIPHENYL SULFONE Public/Granted day:2011-09-08
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