发明申请
US20120245378A1 USE OF AN ACETIC ACID/WATER SOLVENT MIXTURE FOR THE PREPARATION OF LOW-SULFATE 5-SULFOISOPHTHALIC ACID, MONO-LITHIUM SALT FROM 5-ULFOISOPHTHALIC ACID
有权
使用乙酸/水溶剂混合物制备低硫酸盐5硫代磷酸，5-ULFOISOPHTHIC酸的单盐酸盐
- 专利标题： USE OF AN ACETIC ACID/WATER SOLVENT MIXTURE FOR THE PREPARATION OF LOW-SULFATE 5-SULFOISOPHTHALIC ACID, MONO-LITHIUM SALT FROM 5-ULFOISOPHTHALIC ACID
- 专利标题（中）： 使用乙酸/水溶剂混合物制备低硫酸盐5硫代磷酸，5-ULFOISOPHTHIC酸的单盐酸盐
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申请号： US13502333申请日： 2010-10-19
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公开(公告)号： US20120245378A1公开(公告)日： 2012-09-27
- 发明人: Timothy A. Oster , Michael Todd Coleman
- 申请人： Timothy A. Oster , Michael Todd Coleman
- 国际申请： PCT/US10/53186 WO 20101019
- 主分类号： C07C309/58
- IPC分类号： C07C309/58 ; C07C303/22
摘要：
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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