Catalyst for polyester production and process for producing polyester with the same

A catalyst for preparation of a polyester, comprising a reaction product of:

• (A) a titanium compound component comprising at least one member selected from titanium compounds (1) represented by the general formula (I):
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• in which formula (i), R1, R2, R3 and R4 respectively and independently from each other represents an alkyl group having 2 to 10 carbon atoms, k represents an integer of 1 to 3 and, when k is 2 or 3, two or three R2 and R3 substituents may be the same as or different from each other, titanium compounds (2) obtained by reacting the titanium compounds (1) of the general formula (I) with aromatic polycarboxylic acids represented by the general formula (II):
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• in which formula (II), m represents an integer of 2 to 4, or anhydrides of the acids of the formula (II);
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• (B) a phosphorus compound component comprising at least one member of phosphorus compounds (3) represented by the general formula (III):
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• in which formula (III), R5 represents a non-substituted or substituted aryl group having 6 to 20 carbon atoms, or a non-substituted or substituted alkyl group having 1 to 20 carbon atoms.