Production of methyldichlorophosphane

US4101573A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Klaus Gehrmann · Lechenich, DE
• Alexander Ohorodnik · Lechenich, DE
• Karl-Heinz Steil · Hürth, DE
• Stefan Schafer · Aachen, DE

Key dates

• Filing date: Jun 24, 1977
• Grant date: Jul 18, 1978
• Expiry date: Jun 24, 1997

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/52
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Methyldichlorophosphane is made by reacting methane with phosphorus trichloride in contact with carbon tetrachloride at temperatures higher than 500.degree. C. To this end, the starting reactant mixture is admixed with 2 to 7 mol % of reaction-initiating carbon tetrachloride, based on phosphorus trichloride; the carbon tetrachloride is reacted to an extent of 50 to 80% by varying the reaction temperature within the range 550.degree. to 650.degree. C for constant residence times of 0.1 to 0.9 second; and resulting reaction mixture containing a residual analytically detectable 20 to 50% proportion of the carbon tetrachloride used is condensed out.