METHOD OF PRODUCING HIGHER ALKYL(METH)ACRYLATES FOR SYNTHESIS OF POLYMER DEPRESSOR ADDITIVES FOR PARAFFIN-BASE OIL Russian patent published in 2014 - IPC C07C69/54 C07C67/03 C10L1/19 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing higher alkyl(meth)acrylates which are used in synthesis of polymer depressor additives intended to prevent setting and reduction of low-temperature viscosity of paraffin-base oil. The method involves esterification of acrylic acid or a mixture of acrylic acid and methacrylic acid with higher fatty alcohols C16-C26 in a medium of a hydrocarbon solvent in the presence of an acid catalyst and a radical polymerisation inhibitor, followed by neutralisation of the acidic reaction mass using higher primary amines C8-C14 at temperature of 20-90°C and molar ratio of amine groups to free acid groups of (1.0-1.3):1.0. After said neutralisation, the solution of higher alkyl(meth)acrylates can be used to produce polymer depressor additives without further purification.

EFFECT: avoiding formation of wastes in form of salts of salt-containing waste water, high output of products owing to reduced loss of monomers at the neutralisation step, and simple technique of producing the monomer mixture for synthesis of depressor additives for paraffin-base oil.

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