Abstract:
A container for liquefied gas has at least two separate compartments for containing the gaseous phase. Gas ducts are provided for conducting gas of the gaseous phase between the compartments in heat-exchange relationship with the liquefied gas.
Abstract:
1,066,719. Liquefied gas storage containers. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. Jan. 12, 1966, No. 1538/66. Heading F4P. A heat insulated liquid methane storage reservoir of vertical cylindrical form is divided by a horizontal vertically movable wall (8), Fig. 1 (not shown) into a lower space (9) to which iso-pentane is admitted and withdrawn through a duct (7) and on which the wall (8) floats and into an upper space (11) to which liquid methane is admitted and withdrawn through ducts (17 to 24) extending through the reservoir side walls (3, 4) and the dividing wall (8). The latter comprises a metal box charged with compressed nitrogen and having sealing rings (15) engaging the inner wall (3). In operation and assuming the wall (8) being adjacent the reservoir top (2) liquid methane is pumped from a tanker into space (11) and the isopentane forced from space (9) into the tanker space vacated by the liquid isothane and the cold content thereof is used to liquefy gaseous methane prior to shipment. Similarly liquid methane removed from space (11) is used to liquefy gaseous isopentane prior to it being supplied to space (9). The reservoir may be mounted on a concrete foundation (6) or it may be set in a ground excavation.
Abstract:
829,915. Storing liquefied gases. ESSO RESEARCH & ENGINEERING CO. Nov. 21, 1956 [Dec. 12, 1955], No. 35599/56. Class 8(2) [Also in Group XXXIII] A transportable vessel for storing liquefied hydrocarbons of low boiling point e.g. methane at substantially atmospheric pressure comprises an inner container 23 lined with heat insulating material 25 e.g. balsa wood having a liquid-proof lining 29 and submerged in a tank 8 of hydrocarbon liquid of much higher boiling point e.g. petroleum capable of absorbing gas in either the liquid or gaseous phase leaking from the inner container 23. The container 23 which has a vent 33 and a liquid inlet and discharge duct 31 is held by saddles 17, 19, 21 within the tank 8 which also has a vent 39 and a supply and discharge line 37. A plurality of such vessels may be located in the hold of a ship (see Group XXXIII) the engines of which may be fuelled by vented gas. Reference has been directed by the Comptroller to Specification 766,128.