Method of producing tertiary amine-sulphur-trioxide-complexes
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United States of America Patent
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Aug 9, 1994
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N/A
app pub date -
Mar 24, 1992
filing date -
Jul 17, 1989
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Expired
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Abstract
A process for producing tertiary amine-sulphur trioxide complexes of the general formula R.sub.3 N:SO.sub.3 where R is a either methyl, ethyl, or propyl or the group R.sub.3 N is pyridyl comprising forming a reaction mixture of chlorosulfonic acid, pyridine or other tertiary amine R.sub.3 N, where R is previously defined and a chlorinated organic solvent. Gaseous ammonia is passed into the reaction mixture in order to recover amine from amine hydrochloride which is formed as a by-product of the reaction. Since the amine is more soluble in the chlorinated solvent than ammonium chloride that is co-produced, the reaction of the amine with chlorosulfonic acid to produce R.sub.3 N:SO.sub.3 is favored.
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