Institut Francais Du Pe'trole

L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des

Elf France

Isabelle Muller

Bernard Damin

Jacques Garapon

Remi Touet

Catherine Huet

The object of the invention is a catalytic composition comprising titanium and phosphorus and resulting from the contacting of at least one titanate with at least one quaternary 'onium' salt of an acid selected from the group consisting of phosphoric acid and the phosphonic acids of formula R.sup.7 H.sub.2 PO.sub.3 in which R.sup.7 is a hydrocarbon group having 1 to 38 atoms of carbon and the 'onium' remainder is a remainder of formula (R.sup.8 R.sup.9 R.sup.10 R.sup.11 M).sup.+ in which M is an element from the group VA of the periodic table of elements, preferably nitrogen or phosphorous, and R.sup.8, R.sup.9, R.sup.10 and R.sup.11, identical or different, represent each an atom of hydrogen or a hydrocarbon group having 1 to 38 atoms of carbon. This catalytic composition is utilizable for producing asters and polyesters from epoxides and carboxylic acid anhydrides.

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Serezin du Rhone, France

Isabelle Muller