Invention Grant
US09359292B2 Use of an acetic acid/water solvent mixture for the preparation of low-sulfate 5-sulfoisophthalic acid, mono-lithium salt from 5-sulfoisophthalic acid
有权
使用乙酸/水溶剂混合物制备低硫酸盐5-磺基间苯二甲酸,5-磺基间苯二甲酸的单锂盐
- Patent Title: Use of an acetic acid/water solvent mixture for the preparation of low-sulfate 5-sulfoisophthalic acid, mono-lithium salt from 5-sulfoisophthalic acid
- Patent Title (中): 使用乙酸/水溶剂混合物制备低硫酸盐5-磺基间苯二甲酸,5-磺基间苯二甲酸的单锂盐
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Application No.: US13502333Application Date: 2010-10-19
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Publication No.: US09359292B2Publication Date: 2016-06-07
- Inventor: Timothy A. Oster , Michael Todd Coleman
- Applicant: Timothy A. Oster , Michael Todd Coleman
- Applicant Address: US MO Clayton
- Assignee: FutureFuel Chemical Company
- Current Assignee: FutureFuel Chemical Company
- Current Assignee Address: US MO Clayton
- Agency: Additon, Higgins & Pendleton, P.A.
- International Application: PCT/US2010/053186 WO 20101019
- International Announcement: WO2011/049940 WO 20110428
- Main IPC: C07C309/00
- IPC: C07C309/00 ; C07C303/32

Abstract:
There is disclosed a process for making a mono-lithium salt of 5-sulfoisophthalic acid (LiSIPA) having less than 200 ppm sulfate. The process uses a reaction mixture of acetic acid, water, a lithium cation producing compound, and 5-sulfoisophthalic acid. The reaction mixture is heated to reflux, cooled, filtered and washed to obtain a high quality LiSIPA having less than 200 ppm sulfate. Also disclosed is a high quality mono-lithium salt of 5-sulfoisophthalic acid having less than 200 ppm sulfate.
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