Process for hydrogen recovery from ammonia purge gases

Details Process for hydrogen recovery from ammonia purge gases Process for hydrogen recovery from ammonia purge gases

1978-03-20

1979-12-25

Vertiz, O. R.

Chemistry of inorganic compounds

Nitrogen or compound thereof

Ammonia or ammonium hydroxide

55 16, C01C 104

Patent

active

041805534

ABSTRACT:
Ammonia synthesis processes are disclosed which provide enhanced conversion of hydrogen values to ammonia. In the processes, a purge stream from an ammonia synthesis loop, which purge stream contains ammonia, is contacted at a superatmospheric pressure with the feed side of a separation membrane which exhibits selective permeation of each of hydrogen and ammonia as compared to the permeation of each of methane and argon. A total pressure differential across the membrane is maintained to provide a driving force for the permeation of hydrogen and ammonia through the membrane. A hydrogen-rich permeating gas which contains ammonia is obtained on the permeate exit side of the membrane. The permeating gas is combined with the gas in the ammonia synthesis loop and passed to the ammonia synthesis reaction zone for conversion to ammonia. Ammonia which permeates the membrane can be recovered by the means to remove product ammonia from the gas in the synthesis loop. A non-permeating gas is removed from the feed side of the separation membrane at substantially the same pressure at which the purge stream is contacted with the separation membrane.

REFERENCES:
patent: 3675434 (1972-07-01), Crawford et al.
patent: 4058589 (1977-11-01), Haslam
Baichtok et al., Membran Tekhnol-Novoe Napravlenie Nauke Tekh, 1973.
Gardner et al., Hollow Fiber Permeator for Separating _Gases, Chem. Eng. Prog., 10/77, pp. 76-78.
Brubaker et al., Separation of Gases by Plastic Membranes, I & EC, vol. 46, No. 4, pp. 731-739, 1954.

Affiliated with

Also associated with

Rating

Process for hydrogen recovery from ammonia purge gases 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 for hydrogen recovery from ammonia purge gases, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for hydrogen recovery from ammonia purge gases will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2070377