Method for producing mixtures of alkylphosphonous acid salts and dialkylphosphinic acid salts

US8889772B2 · kind B2 · utility

Assignee

• Clariant Finance (BVI) Limited · VG

Inventors

• Michael Hill · Barry, GB
• Sebastian Hoerold · Diedorf, DE
• Werner Krause · Plantsville, US
• Martin Sicken · Cologne, DE

Key dates

• Filing date: Apr 20, 2011
• Grant date: Nov 18, 2014
• Expiry date: Apr 20, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/4816
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a method for producing mixtures of alkylphosphonous acid and dialkylphosphinic acid salts, characterized in that a) a phosphinic acid source (I) is reacted with olefins (II) in the presence of a catalyst A to obtain a mixture of alkylphosphonous acid (III) and dialkylphosphinic acid (IV) or salts or esters thereof, and b) the thus obtained mixture of alkylphosphonous acid (III) and dialkylphosphinic acid (IV) or the salts or esters thereof is reacted with metal compounds of Mg, Ca, Al, Sb, Sn, Ge, Ti, Fe, Zr, Zn, Ce, Bi, Sr, Mn, Li, Na, K and/or a protonated nitrogen base to obtain the corresponding mixtures of alkylphosphonous acid salt (V) and dialkylphosphinic acid salt (VI) of said metals and/or a nitrogen compound, (V) (VI), wherein Y represents Mg, Ca, AI, Sb, Sn, Ge, Ti, Fe, Zr, Zn, Ce, Bi, Sr, Mn, Li, Na; K and/or a nitrogen compound and n represents ¼, ⅓, ½, 1.