Recovery of phosphane and methylphosphane

Details Recovery of phosphane and methylphosphane Recovery of phosphane and methylphosphane

B - Operations, Transporting

01

D

183/32, 23/80, 2

B01D 53/02 (2006.01) C01B 3/56 (2006.01) C01B 25/06 (2006.01) C07F 9/02 (2006.01) C07F 9/50 (2006.01)

Patent

CA 1116537

Abstract of the disclosure Phosphane and/or methylphosphane are recovered from a waster gas mixture containing these phosphanes in admixture with hydrogen, nitrogen and/or non-polar lower hydrocarbons. More specifically, the waste gas mixture is contacted at -20 to +30°C with a zeolite having a pore size of 5 x 10-8 to 15 x 10-8cm. The phosphanes are separated from the remainder of the waste gas mixture by absorbing them on the zeolite until it is saturated therewith. Next, the zeolite is heated to 180 to 230°C and the desorbing phosphanes are collected.

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