USE OF DETERGENT ADDITIVES TO IMPROVE COLD FLOW CHARACTERISTICS OF MINERAL OILS AND MIDDLE DISTILLATES Russian patent published in 2013 - IPC C10L1/14 C10L1/16 C10L10/14 

FIELD: chemistry.

SUBSTANCE: present invention relates to use of at least one oil-soluble olefin copolymer B), which acts as a nucleating agent for paraffin crystallisation for improving response of additives C) for improving cold flow of mineral oil, different from B), in middle distillates which contain at least one ash-free, nitrogen-containing detergent additive A), which is an oil-soluble amphiphilic compound which contains at least one alkyl or alkenyl radical bound to a polar group, said alkyl or alkenyl radical having 10-500 carbon atoms and the polar group having 2 or more nitrogen atoms. The additives C) used to improve cold flow contain oil-soluble polar nitrogenous compounds. The present invention also relates to an additive for middle distillates and a middle distillate having sulphur content lower than 100 ppm and 90% final boiling point lower than 360°C.

EFFECT: present invention provides use of oil-soluble olefin copolymers as nucleating agents for paraffin crystallisation in order to prevent deterioration of efficiency of traditional additives for improving cold flow under the action of nitrogen-containing detergent additives.

26 cl, 47 ex, 4 tbl