METHOD OF PREPARING ALKYL-TERT-ALKYL ESTERS Russian patent published in 2001 - IPC

FIELD: petrochemistry. SUBSTANCE: hydrocarbon mixture containing at least tertiary C₄ and/or C₅ alkenes, C₄ and/or C₅ alkadienes and admixtures of acetylene hydrocarbons and aliphatic alcohol(s) in zone (s) of synthesis of ester(s) with acid cation-exchange catalyst(s) is made to contact, and unreacted hydrocarbons are optionally distilled original hydrocarbon mixture and/or mixture thereof with alcohols(s) is purified to remove acetylene hydrocarbons and oxygen by selective catalytic hydrogenation. In this case, more than 80% preferably more than 95% of alkadienes are retained, and concentration of alkenines is reduced to level of not higher than 0.1%, preferably 0.01% , and purified mixture is fed into ester(s) synthesis zone(s) at temperature of lower than 60 C, preferably lower than 45 C. EFFECT: prolonged activity of catalyst. 11 cl, 3 dwg, 1 tbl