发明名称 |
FOERFARANDE FOER FRAMSTAELLNING AV ETT 3-KLOR-2-SULFOPROPIONSYRAREAGENS OCH DESS VATTENLOESNING SAMT SEPARERING AV SYRAN. |
摘要 |
An improved and novel process for the preparation of an aqueous 3-chloro-2-sulfopropionic acid reagent involves the formation of a reaction mixture by adding acrylic acid to chlorosulfonic acid maintained at about 45 DEG to 130 DEG C., maintaining the mixture at about 60 DEG -130 DEG C. for about 2-6 hours, and adding sufficient water to the resulting anhydrous reagent to decompose the unreacted chlorosulfonic acid and dilute the reagent to a solids content of about 50-95%, preferably 70-90%. The reagent may be vacuum stripped to remove residual hydrochloric acid. Crystalline 3-chloro-2-sulfopropionic acid may be isolated from the aqueous reagent at a solids content above 80% and below 95%, preferably at 85%. |
申请公布号 |
FI75801(B) |
申请公布日期 |
1988.04.29 |
申请号 |
FI19810003681 |
申请日期 |
1981.11.19 |
申请人 |
NATIONAL STARCH & CHEMICAL CORPORATION |
发明人 |
TESSLER, MARTIN M.;NEIGEL, DENNIS V. |
分类号 |
C07C;C07C309/06 |
主分类号 |
C07C |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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