METHOD OF PRODUCING DICYCLOPENTADIENE Russian patent published in 2015 - IPC C07C13/61 C07C2/40 C07C4/22 C07C13/15 C07C17/20 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing dicyclopentadiene, which comprises monomerisation of a dicyclopentadiene-containing fraction in the presence of an inert high-boiling solvent and a polymerisation inhibitor to obtain cyclopentadiene, dimerisation of the cyclopentadiene and fractionation of the concentrated dicyclopentadiene. The initial dicyclopentadiene-containing fraction with total concentration of dicyclopentadiene and cyclopentadiene of 80-98 wt % is mixed with a recycle stream to achieve total concentration of dicyclopentadiene and cyclopentadiene of 50-97 wt %; monomerisation is carried out in the presence of dodecane, which is added in weight ratio of dicyclopentadiene: solvent of 40:60 to 90:10, and alkylphenol which is added in concentration of 0.01-0.5 wt % to achieve dicyclopentadiene conversion of 99.4%. The method includes regenerating the high-boiling solvent, separating unreacted dicyclopentadiene at 115-180°C and pressure of 4-12 kPa and subsequent recycling thereof.

EFFECT: use of the invention increases concentration of dicyclopentadiene in the end product, increases conversion of dicyclopentadiene at the monomerisation step with high total output of dicyclopentadiene and improves technological effectiveness of the process.

2 cl, 2 dwg, 2 tbl, 6 ex