Production of quaternary phosphonium halides

US4122123A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Klaus Hestermann · Lechenich, DE
• Horst Staendeke · Lohmar, DE
• Bernd Lippsmeier

Key dates

• Filing date: Nov 28, 1975
• Grant date: Oct 24, 1978
• Expiry date: Nov 28, 1995

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/5407
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Production of quaternary phosphonium halides of the general formula: EQU [R.sup.1 R.sup.2 R.sup.3 R.sup.4 P]X, in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 stand for identical or different alkyl groups having from 1 to 4 carbon atoms and X stands for halogen, especially for chlorine or bromine. The compounds are more especially made by flowing hydrogen phosphide or a primary phosphine R.sup.1 PH.sub.2 or secondary phosphine R.sup.1 R.sup.2 PH or tertiary phosphine R.sup.1 R.sup.2 R.sup.3 P and an alkyl halide R.sup.4 X in a molar ratio from 0.02 to 10, at a temperature from 100.degree. to 500.degree. C, under a pressure of up to 10 atmospheres gauge and for a period from 0.5 to 500 seconds over a catalyst and separating the resulting quaternary phosphonium halides from the reaction gas. The halides so made are used for making trialkylphosphine oxides and trialkylphosphines.