Synthesis and Investigation of 2,2,5,5 Tetramethylolcyclopentanol Esters as Basics and Component of Lubricating Oils

Improvement of Thermal Oxidative Characteristics of Diesel Fuels With Esters of Cyclic Polyatomic Alcohols

“…The starting cyclic polyatomic alcohols -2,2,5,5-tetramethylolcyclopentanol (TMCP) and 2,2,6,6-tetramethylolcyclohexanol (TMCH) were synthesized by the aldol condensation of cyclopentanone and cyclohexanone with formaldehyde according to the Cannitzaro-Tishchenko reaction according to the following scheme: Symmetric esters were obtained by esterification of TMCP and TMCH with caproic acid, taken in a molar ratio of alcohol:acid of 1:5.5 in the presence of a catalyst of para-toluenesul-fonic acid (PTSA) taken in an amount of 1% of the mass of the reaction mixture, until the release of reaction water is stopped [4,5] ester 4 The complex esters of TMCP and TMCH were obtained in three stages: at the first stage, tetraesters were obtained by esterification of alcohols with caproic acid, at the second stage, the free hydroxyl group was esterified with pimelic acid, and at the third stage, the free carboxyl group of the acid was esterified with hexyl alcohol:…”

“…Since the synthesized esters have symmetric, asymmetric, complex structures, five and six membered cyclic fragments, most polar ester groups should has is of a positive effect on the properties of fuels [4][5][6].…”