Refrigeration – Processes – Circulating external gas
Patent
1978-01-10
1979-07-24
Crasanakis, George
Refrigeration
Processes
Circulating external gas
62 28, 585719, 585802, 585854, C07C 914
Patent
active
041622723
ABSTRACT:
A dry liquid propane substantially free from HF, organic fluorides and water is produced by bringing into intimate contact with a sodium hydroxide solution containing not more than about 5 percent by weight NaOH a liquid propane stream obtained by heating a stream of the propane containing organic fluoride and bringing said stream in contact with a defluorinating agent, e.g., aluminum fluoride, to produce a stream of propane containing HF, the stream of propane containing organic fluorides having been obtained from a hydrogen fluoride stripper operated in conjunction with a depropanizing zone wherein an HF alkylation hydrocarbon product stream or effluent is depropanized. In an embodiment only a relatively small volume of propane containing HF is contacted with the aqueous sodium hydroxide solution whereupon the intermingled fluids are immediately passed into a body of settling propane and aqueous sodium hydroxide solution in a settling zone or vessel.
REFERENCES:
patent: 2463076 (1949-03-01), Zimmerman et al.
patent: 2773920 (1956-12-01), Vautrain et al.
patent: 3449239 (1969-06-01), Moore
patent: 3542196 (1970-11-01), Madlung, Jr.
patent: 3699209 (1972-10-01), Ward
patent: 3919342 (1975-11-01), Chapman
Crasanakis George
Phillips Petroleum Company
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