Dual pressure catalytic distillation hydrogenation column...

Details Dual pressure catalytic distillation hydrogenation column... Dual pressure catalytic distillation hydrogenation column...

2006-05-16

2006-05-16

Nguyen, Tam M. (Department: 1764)

Chemistry of hydrocarbon compounds

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

Hydrocarbon is contaminant in desired hydrocarbon

C585S260000, C585S265000, C585S809000, C203SDIG016

Reexamination Certificate

active

07045669

ABSTRACT:
The charge gas from the thermal cracking of a hydrocarbon feedstock is processed in a front-end catalytic distillation hydrogenation system of an olefins plant to more effectively recover ethylene and propylene product and to process the by-products. The rate of fouling in the system is reduced by employing two columns in the system with the first column operating at a higher pressure and the second column operating at a lower pressure. The hydrogenation as well as fractionation takes place in the first column while the second column is only a fractionator. The temperature of the bottoms from each column is maintained at a temperature less than 200° C. to avoid fouling.

REFERENCES:
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patent: 6000685 (1999-12-01), Groten et al.
patent: 6759562 (2004-07-01), Gartside et al.
patent: WO95/15934 (1995-06-01), None

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