Chemistry of hydrocarbon compounds – Adding hydrogen to unsaturated bond of hydrocarbon – i.e.,... – With preliminary treatment of feed or plural separation...
Reexamination Certificate
2011-05-03
2011-05-03
Griffin, Walter D (Department: 1774)
Chemistry of hydrocarbon compounds
Adding hydrogen to unsaturated bond of hydrocarbon, i.e.,...
With preliminary treatment of feed or plural separation...
C585S259000, C585S810000, C208S144000, C202S262000, C422S187000
Reexamination Certificate
active
07935855
ABSTRACT:
The invention concerns a process and apparatus for treating a feed comprising ethylenic and acetylenic compounds. In the process of the invention, the feed is sent to a distillation step, a C4 cut and a C5+ cut are recovered, a drawn fraction comprising acetylenic compounds is treated in at least one hydrogenation step, and an effluent which is depleted in acetylenic compounds is recycled. The distillation step comprises:an initial step for pre-fractionating the feed, carried out in a pre-fractionation zone included in a distillation column; andat least one complementary fractionation step, carried out in a zone which comprises a portion A, which is distinct from and not adjacent to the portion B of the pre-fractionation zone below the supply, in which the fraction drawn from a point in A is recovered with a C4/C5+ ratio that is higher than that of the feed.
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Bonneau Reynald
Coupard Vincent
Louret Sylvain
Griffin Walter D
IFP Energies Nouvelles
Millen White Zelano & Branigan P.C.
Robinson Renee
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