REESTERIFICATION CATALYST AND PREPARATION METHOD THEREOF Russian patent published in 2011 - IPC B01J27/26 B01J32/00 B01J37/04 C11C3/10 C10G3/00 C07C68/06 C07C69/03 

FIELD: chemistry.

SUBSTANCE: present invention relates to a reesterification catalyst and its preparation method. The invention describes a reesterification catalyst of general formula: Zn₃M₂(CN)_n(ROH)·xZnCl₂·yH₂O, where R is tertiary butyl and M is a transition metal ion selected from Fe, Co and Cr; x lies between 0 and 0.5, y lies between 3 and 5 and n equals 10 or 12. Described is a method of preparing the catalyst, involving the following steps: a) dissolving ZnCb in a mixture of water and tertiary butanol, b) adding the said solution obtained from step a) to an aqueous solution of K₄Fe(CN)₆ while stirring, c) adding a ternary block copolymer of poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (EO₂₀-PO₇₀-EO₂₀; molecular weight of approximately 5800), dissolved in a mixture of tert-butanol and water, to the above mentioned mixture obtained at step (b) while stirring and at temperature 25°C-70°C, d) filtering the reaction mixture obtained at step (c) to obtain a solid product ad then washing with distilled water and drying at temperature 20-50°C and e) activating the said dried solid product at temperature 150-200°C to obtain the desired reesterification catalyst.

EFFECT: ensuring high catalyst activity even in moderate conditions during reesterification of glycerides, esters of fatty acids and cyclic carbonates during reaction with alcohols; leaching of metal ions from the solid catalyst is not observed.

12 cl, 2 tbl, 12 ex