Process for the preparation of methanesulfonic acid
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United States of America Patent
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May 9, 2000
Grant Date -
N/A
app pub date -
Oct 1, 1998
filing date -
Oct 4, 1997
priority date (Note) -
Expired
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Abstract
The process for the preparation of methanesulfonic acid by reacting sulfite ions within an aqueous system with dimethyl sulfate at an elevated temperature and adding a strong acid subsequently, wherein the molar ratio of sulfite ions to dimethyl sulfate is 1.5 to 2.5:1, preferably 2:1, and the reaction charge is maintained at said elevated temperature for at least 2 h, preferably 4 h.
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