METHOD OF PRODUCING CATALYST FOR POLYMERISATION OF LACTONES OR POLYCONDENSATION OF ALPHA-OXYACIDS Russian patent published in 2014 - IPC B01J37/12 B01J37/14 B01J31/12 B01J23/14 C07F7/22 C08G63/85 

FIELD: chemistry.

SUBSTANCE: disclosed is a method of producing a catalyst by reacting tin metal with oxyacids, wherein catalyst synthesis is carried out in a melt or solution of oxyacids in the presence of oxidising agents at temperature of 20-240°C while stirring constantly. The oxidising agents used are air or molecular oxygen or hydrogen peroxide or organic hydroperoxides. The α-oxyacids used are compounds with ratio of hydroxyl to carboxyl groups in the range of 1(3):3(1). Condensation of oxyacids with removal of the released water can be carried out concurrently or consecutively with catalyst synthesis.

EFFECT: simple process of producing a catalyst which is compatible with the next catalysis objects, is protected from hydrolysis and does not require solvent for dosage.

4 cl, 1 tbl, 11 ex