METHOD FOR PRODUCTION OF ESTERS Russian patent published in 1996 - IPC

FIELD: organic chemistry. SUBSTANCE: desired product represents esters of aliphatic dicarboxylic acids having formula C_nH_2n(COOH)₂ where n=4-10 or esters of anhydrides of aromatic acids having formula C₆H_n(COOH)_m[(CO)₂O]_p where n= 2-4, m=0-1, p=1-2. Yield of desired product is 98-99.5 %, its acid number being 0.05-0.07 mg KOH/g. Dicarboxylic acid having formula C_nH_2n(COOH)₂ where n= 4-10 or anhydride of aromatic acid having formula C₆H_n(COOH)_m[(CO)₂O]_p where n=2-4, m=0-1, p=1-2 is used as reagent 1. Monohydric aliphatic alcohol having formula C_nH_2n+1 where n=4-20 or their mixture is used as reagent 2. Reaction is carried out at 150-250 C in the presence of catalyst, quantity of said catalyst being 0.01-1 mass % of reaction mass. Tetralkyl titanate and halide of metal of the first or of the second group of periodic table at mass ratio 1:(0.001-1.000) being used as said catalytic system. EFFECT: improves efficiency of method. 1 tbl