Reliance Industries Limited

Uttam Maity

Ninad Deepak Ingle

Pradip Munshi

Rakshvir Jasra

Sunil Peter

Gordhan Das Goyal

Santosh Agrawal

Vriti Singh

Vishal Bhupendrakumar Shah

The present disclosure provides an effective and efficient process for the preparation of a dry chlorinated polyvinyl chloride (CPVC), comprising introducing chlorine gas into slurry of polyvinyl chloride in water to obtain a reaction mixture; irradiating the reaction mixture to obtain a product mixture comprising CPVC and water solution including unreacted chlorine gas and hydrogen chloride; filtering the product mixture to obtain a first mass; adding water to the first mass for extracting unreacted chlorine gas and hydrogen chloride to obtain an aqueous suspension, and filtering the aqueous suspension to obtain a second mass; passing nitrogen through the second mass to extract residual water solution to leave behind a third mass; and agitating the third mass in a high-speed mixer together with a neutralizing agent, and optionally with a stabilizer and a processing additive to obtain dry thermally stable CPVC with thermal stability in the range of 1000 seconds to 1500 seconds.

Process for the preparation of dry chlorinated polyvinyl chloride

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West Bengal, India

Uttam Maity