METHOD FOR SELECTIVE HYDROGENATION OF PHENYLACETYLENE IN PRESENCE OF STYRENE USING COMPOSITE LAYER Russian patent published in 2013 - IPC C07C7/167 C07C15/46 C07C5/09 B01J23/44 B01J23/755 B01J23/72 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for selective hydrogenation of phenylacetylene in the presence of styrene which is carried out in a composite layer. The method involves, in hydrogenation reaction conditions, passing a starting hydrocarbon fraction stream containing phenylacetylene and styrene through a composite layer in a reactor containing a catalyst A and a catalyst B to successively bring into contact the starting stream with catalyst A and catalyst B. Catalyst A is a nickel-based catalyst and catalyst B is at least one catalyst selected from a group consisting of a palladium-based catalyst a copper-based catalyst, and the weight ratio of the catalyst A used to the catalyst B used ranges from 0.5:1 to 5:1.

EFFECT: use of the present method provides high degree of removal of phenylacetylene with low loss of styrene.

9 cl, 6 ex