Process for the isolation of tetrachlorobutane and for the production of phenolic resins from mixtures of chlorine-substituted hydrocarbons

US5071943A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Manfred Abele
• Hans-Josef Buysch · Krefeld, DE
• Michael Happ · Scottsdale, US
• Werner Obrecht · Moers, DE
• Heinrich Schrage · Krefeld, DE
• Hugo Vernaleken · Walsrode, DE

Key dates

• Filing date: Feb 15, 1991
• Grant date: Dec 10, 1991
• Expiry date: Feb 15, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L21/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Secondary products formed in the chlorination of butadiene can be reacted with phenols in the absence of iron catalysts to form novolak-like phenolic resins in such a way that the tetrachlorobutane present in the secondary products does not react. It can be distilled off with the excess phenol and isolated in pure form from the distillate obtained.