Loading patent…
AssigneeCouncil of Scientific and Industrial Research
InventorsPrashant Purushottam Barve, Sunil Shankar Joshi, Ravindra William Shinde, Shrikant Madhukar Ghike, Milind Yashwant Gupte, Chandrashekhar Narayan Joshi, Raghavendra Venkatrao Naik
Estimating the term…
The present invention provides a process for the preparation of highly pure 2-Methyl-2-propene-1-sulfonic acid, sodium salt in high yield, with very low iron content, by the reaction of distilled sulfur trioxide complexed with a Lewis base in a halogentated solvent, the unreacted sulfur trioxide vapors being removed from the reactor before the mixture is treated with liquefied isobutylene, and neutralization by a base with an iron content within the range of 0 to 20 ppm.
A process for the preparation of highly pure 2-Methyl-2-propene-1-sulfonic acid, sodium salt in high yield and with very low iron content comprising reacting distilled sulfur trioxide complexed with a Lewis base, in a halogenated solvent, removing unreacted SO3 vapors before treating the mixture with liquefied isobutylene, treating the mixure with liquefied isobutylene, neutralizing the reaction mixture with a base, separating the layers into a heavy organic and a lighter aqueous layer, precipitating the impurities from the aqueous layer by adding a non-solvent, and removing the non-solvent to obtain the product.
Dependencies are inferred from the claim text.