The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 09, 2003
Filed:
Mar. 18, 2002
Prashant Purushottam Barve, Maharashtra, IN;
Sunil Shankar Joshi, Maharashtra, IN;
Ravindra William Shinde, Maharashtra, IN;
Shrikant Madhukar Ghike, Maharashtra, IN;
Milind Yashwant Gupte, Maharashtra, IN;
Chandrashekhar Narayan Joshi, Maharashtra, IN;
Raghavendra Venkatrao Naik, Maharashtra, IN;
Council of Scientific and Industrial Research, New Delhi, IN;
Abstract
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.