CATALYST FOR OBTAINING ISOPRENE Russian patent published in 2015 - IPC C07C11/18 C07C1/20 C07C2/86 B01J23/652 

FIELD: chemistry.

SUBSTANCE: catalyst for obtaining isoprene by liquid-phase interaction of formaldehyde and isobutylene and/or substances, for instance 4,4-dimethyldioxane-1,3 and trimethyl carbinol, including water solution of inorganic acid and cations of metals, with catalyst containing as inorganic acid either mixture of ortho- and pyrophosphoric acids, or ortho- and poly-phosphoric acids, or ortho- and metaphosphoric acids and cations of metals of VI and X group of Mendeleev's Periodic table of elements with weight ratio mixture of inorganic acids, counted per orthophosphoric acid:cations of metals of VI group:cations of metals of X group equal 1:(0.01-0.5):(0.003-0.04) respectively.

EFFECT: method makes it possible to realise process with higher productivity.

2 cl, 1 tbl, 8 ex