Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition – Control element is fluid pressure sensitive
Patent
1982-09-27
1984-10-09
Marcus, Michael
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
Control element is fluid pressure sensitive
422113, 422115, 422117, 422169, 423240, 423241, B01J 1000, G05D 1600
Patent
active
044760973
ABSTRACT:
Hydrocarbon vapors containing HF, as from an HF alkylation refrigerated vent gas yield, the reactor settler, and the like are charged to a liquid knock-out drum to remove entrained liquid therefrom, the recovered liquid being pumped to storage in response to liquid level control on the knock-out drum. Recovered vapors are charged to a circulating aqueous caustic treater to yield HF-free vapors, as to a flare. The circulating caustic solution is indirectly heated in response to a preselected caustic solution temperature to prevent freezing. A high pressure rupture disc, upstream from the knock-out drum, affords a vapor relief safety by-pass of the treater. Dry gas, such as nitrogen or sweet, natural gas, continuously sweeps the relief line to maintain this line open and operable.
REFERENCES:
patent: 2773920 (1956-12-01), Vautrain et al.
patent: 2792070 (1957-05-01), Strunk
patent: 2988894 (1961-06-01), Van Pool et al.
patent: 3158661 (1964-11-01), Plaster et al.
patent: 3206390 (1965-09-01), Van Pool
patent: 3972956 (1976-08-01), Carter
patent: 4009221 (1977-02-01), Carter
Potts Mack F.
Van Pool Joe
Doescher Howard D.
Marcus Michael
Phillips Petroleum Co.
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