Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1988-10-26
1989-10-17
Cintins, Ivars
Liquid purification or separation
Processes
Ion exchange or selective sorption
55 31, 55 72, 210678, 210679, 210688, 210689, 423107, 423210, B01D 1500, B01D 5304
Patent
active
048745251
ABSTRACT:
Mercury is selectively removed to very low levels of concentration from fluid streams such as natural gas, cracked gas, hydrogen or naphtha by passage of the stream through an adsorbent bed containing particles of a zeolitic molecular sieve having pore diameters of at least 3.0 Angstroms and in which the zeolite crystallites forming the outer shell of the adsorbent particle to a depth of not greater than about 0.1 millimeter into the adsorbent particle, contain ionic or elemental silver. These adsorbent particles are utilized to particular advantage in a compound adsorbent bed containing a desiccant substantially free of silver through which a fluid stream containing both mercury vapor and water vapor is both dried and purified with respect to mercury by passage therethrough, coupled with periodic regeneration of both media using conventional purge desorption methods.
REFERENCES:
patent: 3193987 (1965-07-01), Manes et al.
patent: 3257776 (1966-06-01), Park et al.
patent: 4101631 (1978-07-01), Ambrosini et al.
patent: 4709118 (1987-11-01), Yan
Barrer et al., "Mercury Uptake in Various Cation Forms of Several Zeolites", J. Chem. Soc. (1967) pp. 19-25.
Cintins Ivars
McBride Thomas K.
UOP
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