Council of Scientific and Industrial Research

Sunil Shankar Joshi

Prashant Purushottam Barve

Ravindra William Shinde

Milind Yashwant Gupte

Chandrashekhar Narayan Joshi

Shrikant Madhukar Ghike

Raghavendra Venkatrao Naik

Raghunath Vitthal Chaudhari

Ashutosh Anant Kelkar

Sunil Sadashiv Divekar

Aruna Narayan Bote

Rajendra Anantrao Kulkarni

The present invention provides an improved process for the production of carboxylic acids by the carbonylation of alcohol. The process involves contacting an alcohol with carbon monoxide in the presence of a nickel compound, a heterocyclic organic compound and an iodide promoter to produce the corresponding carboxylic acid. The improvement relates to the use of heterocyclic organic compound as a promoter containing at least two heteroatoms of which at least one is selected independently from S or N, which provides an inexpensive and stable catalyst system.

Process for the preparation of carboxylic acids from aliphatic alcohols

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.

Process for the preparation of 2-Methyl-2-propene-1-sulfonic acid, sodium salt

The present invention provides a process for the preparation of highly pure 2-acrylamido-2-methyl-1-propanesulfonic acid in high yield, with improved appearance, by the reaction of acrylonitrile with more than 98% sulfuric acid or oleum and liquefied isobutylene in presence of weak inorganic acids or organic sulfonic acids.

Process for the preparation of 2-acrylamido-2-methyl-1-propanesulfonic acid

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Maharashtra, India

Sunil Shankar Joshi