METHOD OF PRODUCING ISOPRENE Russian patent published in 2012 - IPC C07C11/18 C07C1/20 B01J21/02 B01J21/04 B01J21/08 B01J21/10 B01J23/06 B01J23/30 B01J23/14 B01J23/34 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing isoprene by reacting an organic C₄ compound and methylal in vapour phase on a fixed catalyst bed which is boron phosphate containing at least one oxide and/or a compound which can be easily decomposed to oxides, selected from a group comprising aluminium, magnesium, zinc and silicon, characterised by that the organic C₄ compound used is tertiary butyl alcohol, the process is carried out in an apparatus, having at least one section filled with a catalyst, and the catalyst used further contains at least one oxide and/or a compound which can be easily decomposed to oxides, selected from a group comprising manganese, tungsten, tin, titanium and zirconium, with the following content of components, wt %: oxides and/or compounds easily decomposed to oxides, selected from a group comprising aluminium, magnesium, zinc and silicon 1.5-65; oxides and/or compounds easily decomposed to oxides, selected from a group comprising manganese, tungsten, tin, titanium and zirconium 0.1-28; boron phosphate - the rest.

EFFECT: use of the present method widens the raw material base, increases selectivity and increases periods between catalyst regeneration.

8 cl, 7 ex, 1 tbl