Pressure vessel systems and methods for dispensing liquid chemical compositions
AssigneeAmerican Air Liquide, Inc.
InventorsMindi Xu, Hwa-Chi Wang, Herve E. Dulphy
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Abstract
Apparatus and processes are presented to contact a dry, preferably high purity inert gas with a chemical composition in a pressure vessel, or a wetting composition, to form a wet inert gas, which is then used to pressurize the chemical composition out of the pressure vessel. No additional space is needed for an external humidifier. Since a very small amount of vapor is needed to form a wet inert gas, the composition of chemical composition will not be significantly affected.
Claims8
An apparatus for delivery of chemical compositions, the apparatus comprising:
- a) a pressure vessel comprising an inlet and an outlet for a liquid chemical composition, and a vapor space, the pressure vessel adapted to contain the liquid chemical composition, the liquid chemical composition having a vaporizable portion therein;
- b) means for contacting a dry inert gas with at least a portion of the liquid chemical composition in the pressure vessel to transfer at least a portion of the vaporizable portion from the chemical composition to the inert gas to form a wet inert gas in the vapor space;
- and
- c) means for pressurizing the chemical composition out of the vessel using the wet inert gas.
A method of delivering a chemical composition, the method comprising the steps of:
- a) filling a pressure vessel with a liquid chemical composition comprising a vaporizable component, the pressure vessel having a vapor space and adapted to contain the liquid chemical composition;
- b) contacting a dry inert gas with at least a portion of the liquid chemical composition in the pressure vessel to transfer at least a portion of the vaporizable composition from the liquid chemical composition to the dry inert gas to form a wet inert gas in the vapor space;
- and
- c) pressurizing the liquid chemical composition out of the pressure vessel using the wet inert gas in the vapor space.
Dependencies are inferred from the claim text.