METHOD OF PURIFYING STYRENE FROM PHENYLACETYLENE IMPURITIES

摘要

FIELD: chemistry. ^ SUBSTANCE: invention relates to a method of purifying styrene from phenylacetylene impurities through hydrogenation with molecular hydrogen at high temperature in the presence of a gold-containing catalyst which contains gamma aluminium oxide. The method is characterised by that the catalyst is in form of gold metal particles with average size of 2-3 nm, and total content of gold in the catalyst is 0.01-0.03 wt %; the process is carried out in gaseous phase at temperature 140-160C. ^ EFFECT: use of the method enables sharp reduction in consumption of precious metal in the catalyst while ensuring complete purification of styrene from phenylacetylene, prevention of loss of styrene and stable operation of the catalyst. ^ 1 cl, 2 dwg, 2 ex, 1 tbl