Vinyl chloride production

US4788357A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Gerhard Dummer · Altötting, DE
• Klaus Haselwarter · Burghausen, DE
• Hermann Klaus · Marktl, DE
• Ludwig Schmidhammer · Haiming, DE
• Rudolf Strasser · Baoshan, TW

Key dates

• Filing date: Jul 16, 1987
• Grant date: Nov 29, 1988
• Expiry date: Jul 16, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C17/383
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

An improved method of producing vinyl chloride by pyrolysis of purified 1,2-dichloroethane at temperatures from 480.degree. C. to 540.degree. C. at a pressure of 10 to 36 bar absolute with partial utilization of the heat content of the flue gases from the pyrolysis furnace firing to preheat liquid 1,2-dichloroethane almost to its boiling temperature utilizing the flue gas waste heat to generate steam, cool the pyrolysis gas mixture in several stages and separate the hydrogen chloride from the pyrolysis gas mix in a hydrogen chloride column as well as separate vinyl chloride from the pyrolysis gas mix in a vinyl chloride monomer column.