The favorite adsorption sites of ethylene (C_2H_4) and acetylide (CCH) on the Ni(110) surface are investigated by the theoretical calculation of the pseudo_potential plane_wave method.

The bimetallic Pd-D/Al_2O_3(D was(ⅥA) group element in pexiodic chart) selective hydrogenation catalyst for removing vinylacetylene(VAC) in cracked C_4 mixture was prepared by adopting fractional dip-molding and carring active constituent PdCl_2 and assistant D onto Al_2O_3.

After hydrogenation both ethylacetylene and vinylacetylene contents are reduced to below 1 0×10 -5 ,and 1,3 butadiene loss does not exceed 3

AM1 Studies of Two Pathways of Vinylacetylene React with Nitric Oxide;

Results showed that the catalyst can cut down the content of vinyl acetylene in C 4 fraction to less than 1 ppm with 1,3 butadiene loss of less than 0 5% and catalyst life of 500 h.

The plant decreased the consumptions of materials and powers and the content of vinyl acetylene in butadiene was below 7×10-6.

and a less portion of acetylene was trimerized into divinylacetylene ( DVA) with MVA .

In this dissertation,copper-catalysized azide-alkyne 1,3-dipolar cycloaddition was used for chemical modification of PVacet and for synthesis of novel linear polymers to obtain a series of 1,2,3-triazole rings containing polymers in backbones or side-chains.