Arsine and phosphines as acetylene converter moderators

Details Arsine and phosphines as acetylene converter moderators Arsine and phosphines as acetylene converter moderators

1994-06-22

1995-10-31

McFarlane, Anthony

Chemistry of hydrocarbon compounds

Adding hydrogen to unsaturated bond of hydrocarbon, i.e.,...

Hydrocarbon is contaminant in desired hydrocarbon

585259, 585850, 585852, 585856, C07C 503, C07C 7152, C07C 700

Patent

active

054631548

ABSTRACT:
A method for acetylene hydrogenation which involves adding a member selected from the group consisting of arsine and phosphine to moderate the activity of acetylene hydrogenation catalysts while maintaining acceptable catalyst activity and avoiding the risk of product quality contamination by the acetylene converter moderator. The acetylene hydrogenation process involves adding arsine at a concentration level within the range of about 1 wppb-3 wppb to the gas, such as ethylene, containing acetylene to prevent temperature runaway during the exothermic acetylene hydrogenation reaction. By controlling the presence of arsine levels to such a relatively low level, temperature runaway during the highly exothermic acetylene hydrogenation reaction is prevented while maintaining acceptable catalyst activity levels for purposes of the acetylene hydrogenation reaction.

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