Chemistry of hydrocarbon compounds – Adding hydrogen to unsaturated bond of hydrocarbon – i.e.,... – Hydrocarbon is contaminant in desired hydrocarbon
Patent
1998-12-09
2000-03-21
Griffin, Walter D.
Chemistry of hydrocarbon compounds
Adding hydrogen to unsaturated bond of hydrocarbon, i.e.,...
Hydrocarbon is contaminant in desired hydrocarbon
585261, 585264, 585833, 585860, 585864, 203 29, 203DIG6, C07C 503, C07C 502, C07C 710
Patent
active
060404892
ABSTRACT:
A process for separating 1,3-butadiene from a crude C.sub.4 stream containing butanes, butenes, butadienes and acetylenes has been developed. The process begins with introducing hydrogen, a solvent, and the crude C.sub.4 stream to a catalytic extractive distillation unit having a reaction zone containing a catalyst capable of hydrogenating acetylenes. Butanes and butenes, being less soluble in the solvent, are distilled in an overhead stream from the catalytic extractive distillation unit. Butadienes and acetylenes, being more soluble in the solvent, are carried with the solvent to the reaction zone located within the catalytic extractive distillation unit. In the reaction zone the acetylenes are converted to hydrogenation products. The hydrogenation products other than butadiene are separated from the butadienes by the extractive distillation occurring in the unit. The solvent and butadiene mixture is removed from the catalytic extractive distillation unit in a distillate stream. The distillate stream is then introduced to a solvent stripping column to separate by distillation a solvent bottoms stream from a butadiene overhead stream. The butadiene overhead stream is introduced to a butadiene distillation column to separate a 1,3-butadiene overhead stream from a 1,2-butadiene bottoms stream. The solvent bottoms stream may be purified and recycled to the catalytic distillation unit.
REFERENCES:
patent: 3160579 (1964-12-01), Fear
patent: 3342891 (1967-09-01), Poons et al.
patent: 3541178 (1970-11-01), Nettesheim
patent: 3842137 (1974-10-01), Libers et al.
patent: 3898298 (1975-08-01), Desiderio et al.
patent: 4277313 (1981-07-01), Mehra et al.
patent: 4469907 (1984-09-01), Araki et al.
patent: 4704492 (1987-11-01), Nemet-Mavrodin
patent: 5414170 (1995-05-01), McCue et al.
patent: 5877363 (1999-03-01), Gildert et al.
Abrevaya, H; Vora, B.V.; Lentz R.A. "Improved Butadiene Technology for Naphtha Cracking," Presented at the Fifth World Congress of Chemical Engineering, San Diego, Jul. 1996.
Griffin Walter D.
Maas Maryann
McBride Thomas Kl
Molinaro Frank S.
Nguyen Tam M.
LandOfFree
1,3-Butadiene separation from a crude C.sub.4 stream using catal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with 1,3-Butadiene separation from a crude C.sub.4 stream using catal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 1,3-Butadiene separation from a crude C.sub.4 stream using catal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-731823