POLYCONDENSATION WITH UTILIZATION OF THE CATALYTIC AGENT AND THE PROMOTER OF THE CATALYTIC AGENT FOR PRODUCTION OF POLYESTER Russian patent published in 2006 - IPC B01J31/04 C08G63/82 C08G63/83 C08G63/85 C08G63/86 C08G63/183 

FIELD: chemical industry; methods of production of polyester.

SUBSTANCE: the invention is pertaining to the field of chemical industry, in particular, to the method of production of polyester. The true invention is pertaining to the synergetic compositions of titanium-containing catalytic agents and the promoters for the catalytic agents consisting of the carboxylic acid or the oxalic acid or their salts, which are used at production of polyesters. The invention presents the catalytic composition for production of the polyesters containing titanyl oxalate,_{XmTiO(C2O4)2(H2O)n , where X= Li, K, Rb, Cs and Ca, To, Rb, Cs and Ca, m=1 or 2; the promoter of the catalystic agent containing oxalic acid or carboxylic acid containing from 1 up to 26 carbonic atoms, or their corresponding salt containing Li, Na, K or ammonium; Sodium oxalate of the promoter of the catalystic agent makes from 0.1 up to 80 mass shares from the composition of the mass of titanium. There is a description of the activated catalytic agent containing titanium compound XmTiYo , where X=H, Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba and ammonium; m=0.1 or 2, Y = bis (2, 2, 6, 6 - tetramethyl-3.5- heptanedionate) and acetylacetonate; and the promoter of the catalytic agent consisting of an oxalic acid or its corresponding salt containing Li, Na, K or the ammonium. At that the promoter of the catalytic agent makes 0.1 mass share up to 80 mass shares from the composition of the mass titanium. The invention describes the composition of the activated catalytic agent including the catalytic agent and the promoter of the catalytic agent and the composition including germanium containing the catalytic agent and the promoter of the catalytic agent. The invention also describes the method of production of the polyester by polycondensation of the reactants at the presence of the above described catalytic agent and the produced polyesters. The technical result of the invention is production of the improved polyester with the smaller acetaldehyde number and the good coloration.}

EFFECT: the invention ensures production of the improved polyester with the smaller acetaldehyde number and the good coloration.

22 cl, 1 tbl, 24 ex