Refrigeration – Processes – Circulating external gas
Patent
1992-12-30
1994-08-02
Capossela, Ronald C.
Refrigeration
Processes
Circulating external gas
62 20, F25J 302
Patent
active
053334620
ABSTRACT:
Process and apparatus for the purification of hydrogen by cryogenic treatment of a gas containing also nitrogen oxides and unsaturated hydrocarbons as two types of constituents which react together in an undesirable fashion when cooling achieves an intermediate temperature higher than the low temperature of the treatment. The process comprises cooling the gas to a first temperature higher than that intermediate temperature; eliminating from the gas one of the two types of constituents at this first temperature; and continuing the cooling of the gas to the low temperature. The elimination of one type of component is effected by washing the gas with a liquid adapted to dissolve it. This liquid contains at least one saturated hydrocarbon and is obtained by a partial condensation of an auxiliary gas which contains at least one of hydrogen and a heavy constituent whose value can be increased. The gas treated can be a residual gas from catalytic cracking in a fluidized bed (FCC), and the auxiliary gas can be a hydrotreatment purge gas.
REFERENCES:
patent: 2315424 (1943-03-01), Hill et al.
patent: 2975605 (1961-03-01), Haringhuizen
patent: 3408792 (1968-11-01), McHarg
patent: 3691779 (1972-09-01), Meisler et al.
patent: 4336045 (1982-06-01), Fisher et al.
patent: 4482369 (1984-11-01), Carson et al.
"NO.sub.x in the Cryogenic Hydrogen Recovery Section of an Olefins Production Unit", Plant/Operations Progress, vol. 5, No. 4, Oct. 1986, pp. 232-237 by W. H. Henstock.
Garot Corinne
Gauthier Pierre
Capossela Ronald C.
L'Air Liquide, Societe Anonyme pour l'etude et l'Exploitation de
LandOfFree
Process and apparatus for the purification of hydrogen by cryoge does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process and apparatus for the purification of hydrogen by cryoge, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and apparatus for the purification of hydrogen by cryoge will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-58789