Gas separation: processes – Solid sorption – With plural indirect heat transfer steps on solid sorbent or...
Reexamination Certificate
2007-01-25
2010-10-26
Lawrence, Frank M (Department: 1797)
Gas separation: processes
Solid sorption
With plural indirect heat transfer steps on solid sorbent or...
C095S142000, C423S488000
Reexamination Certificate
active
07819949
ABSTRACT:
(Chloro)hydrocarbon-free hydrogen chloride and phosgene-free (chloro)hydrocarbons are recovered from a hydrogen chloride stream having (chloro)hydrocarbons and phosgene. The recovery involves connecting a first adsorber and a second adsorber in series and passing the fresh hydrogen chloride stream comprising phosgene and (chloro)hydrocarbons firstly through the first adsorber and subsequently through the second adsorber until essentially no more (chloro)hydrocarbon is adsorbed by the first adsorber, passing the fresh hydrogen chloride stream through the second adsorber while the first adsorber is regenerated, with essentially phosgene-free (chloro)hydrocarbon being obtained in the regeneration, passing the fresh hydrogen chloride stream firstly through the second adsorber and subsequently through the regenerated first adsorber until essentially no more (chloro)hydrocarbon is adsorbed by the second adsorber, and passing the fresh hydrogen chloride stream through the first adsorber while the second adsorber is regenerated, with essentially phosgene-free (chloro)hydrocarbon being obtained in the regeneration.
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Chemical Abstracts+Indexes, American Chemical Society, 116, No. 12, XP-000255954, Mar. 23, 1992, p. 195.
Ciprian Juergen
Deberdt Filip
Karches Martin
Schelling Heiner
Schubert Olga
BASF - Aktiengesellschaft
Lawrence Frank M
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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