METHOD OF PRODUCING DICYCLOPENTADIENE Russian patent published in 2012 - IPC C07C13/61 C07C7/20 C07C2/42 C07C2/50 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing dicyclopentadiene, involving successive thermal dimerisation of cyclopentadiene from material of cyclopentadiene-containing fractions of hydrocarbons containing not less than 15% cyclopentadiene, fractionation and separation of dicyclopentadiene concentrate, monomerisation of dicyclopentadiene in the presence of substituted phenols at temperature 165-185°C to obtain cyclopentadiene, followed by re-dimerisation of cyclopentadiene. The method is characterised by that dimerisation of cyclopentadiene from the material is carried out at temperature 80-110°C, fractionation is carried out in the presence of methanol, taken in molar ratio to ΣC₅-dienes, contained in the material, of (1-1.5):1, respectively, monomerisation is carried out in the presence of a mixture of alkyl- and aryl-substituted phenols in ratio (50-70):(50-30), respectively, fed in amount of 10-20% to the dicyclopentadiene concentrate, and re-dimerisation of cyclopentadiene is carried out at temperature 60-80°C.

EFFECT: use of the present method increases output of dicyclopentadiene to 90 wt % with polymerisation purity of not less than 98,5%.

1 cl, 8 ex, 1 tbl