Relief system

Details Relief system Relief system

1981-08-28

1983-10-11

Thomas, Earl C.

Chemistry of hydrocarbon compounds

Saturated compound synthesis

By condensation of a paraffin molecule with an olefin-acting...

423240, 422113, C07C 262, B01D 5334

Patent

active

044094205

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

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