METHOD OF SYNTHESIS OF SATURATED BRANCHED HYDROCARBONS Russian patent published in 2002 - IPC

FIELD: organic chemistry, chemical technology. SUBSTANCE: invention relates to a method of synthesis of saturated branched hydrocarbons that can be used for the octane number increase. Saturated hydrocarbons of the general formula: where R means n- C₄H₉, n-C₅H₁₁, n-C₉H₁₉ are synthesized by hydroalkylation reaction of α- olefins in the presence of a catalyst. Alkylsubstituted α- olefins RCH=CH₂ (heptene-1, undecene-1, dodecene-1) interact with tert. -butyl bromide (t-BuBr) in the presence of triethylaluminum (Et₃Al) and titanocene dichloride (Cp₂TiCl₂) as a catalyst taken in the mole ratio RCH= CH : t-BuBr : Et₃Al : Cp₂TiCl₂ = 10 : (15-25) : (15-25) : (0.1-0.5), respectively, under normal conditions in atmosphere of an inert argon, in hexane medium, at stirring for 6-8 h and by the following hydrolysis of the reaction mass with 10% hydrochloric acid solution. The new method ensures to obtain the end product with the yield 72-90%. EFFECT: improved method of synthesis, increased yield. 1 tbl