Fluid handling – Processes
Patent
1990-05-21
1991-01-01
Cohan, Alan
Fluid handling
Processes
137575, 137265, 141 35, 141 1, 220 85VR, B65B 304
Patent
active
049811533
ABSTRACT:
A method and apparatus for reducing hydrocarbon vapor emission from a hydrocarbonaceous liquid in a storage tank during filling of same wherein at least two storage tanks are present and an essentially inert gas is provided in a first storage tank containing said hydrocarbonaceous liquid, the inert gas being at a temperature at least about equal to or above the temperature of the hydrocarbonaceous liquid, and as said first storage tank fills with hydrocarbonaceous liquid removing at least a portion of said inert gas from said first storage tank and passing same into a least one second storage tank that is later to be filled thereby (a) displacing from said second storage tank atmospheric gas originally present which is below the temperature of said hydrocarbonaceous liquid, (b) prewarming said second storage tank, (c) substituting said inert gas for said atmospheric gas, and (d) reducing hydrocarbon vapor emission from the fill liquid in the second storage tank.
REFERENCES:
patent: 4157248 (1979-06-01), Queiser
patent: 4266580 (1981-05-01), Dixon
patent: 4304271 (1981-12-01), Larssen
patent: 4515189 (1985-05-01), Larssen
patent: 4586547 (1986-05-01), Fields
Atlantic Richfield Company
Cohan Alan
MacDonald Roderick W.
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