HF alkylation and selective hydrogenation process

Details HF alkylation and selective hydrogenation process HF alkylation and selective hydrogenation process

1987-12-11

1988-09-27

Davis, Curtis R.

Chemistry of hydrocarbon compounds

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

With subsequent diverse conversion

585259, 585331, 585723, C07C 500, C07C 258

Patent

active

047743751

ABSTRACT:
A process using selective hydrogenation and HF alkylation in combination that employs a multifunction alkylation stripper for removal of light ends from the selective hydrogenation and a alkylation operations. The process combines the effluent from the selective hydrogenation operation, an isobutane feed stream and a bottoms stream from the HF stripper in the alkylation feed stripper. The feed stripper provides a C.sub.4 -plus bottoms stream that serves as the feed to the alkylation zone and a C.sub.3 -minus overhead that can be recovered as fuel gas. Significant benefit is obtained from this process when processing a mixed olefin feed of C.sub.3 /C.sub.4 hydrocarbons and recovering a high purity C.sub.3 product stream ahead of the selective hydrogenation zone. Another variation of this process allows a C.sub.3 product stream to be withdrawn from the alkylation feed stripper either directly as a sidecut or downstream of an overhead condensor.

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Oil and Gas Journal, Feb. 11, 1974 issue, starting at p. 78.

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