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US Patent 6028235 - Gas hydrate regassification method and apparatus using steam or other heated gas or liquid

US Patent Issued on February 22, 2000
Estimated Patent Expiration Date: Icon_subject October 14, 2017Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
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Abstract

A method and apparatus for safely, conveniently, and inexpensively liberating gas from gas hydrates includes the use of a device, provided adjacent to or in the bulk gas hydrates, for exposing the gas hydrates to heat from a gas or liquid (preferably steam). The gas hydrates can be directly exposed to the gas or liquid or indirectly exposed through a thermally conductive coil or channel. The heat from the gas or liquid dissociates the gas hydrates into the corresponding gas component and water component. After liberation, the gas component can be collected for further storage, transport, or use. The apparatus further includes a mechanism for moving at least a portion of the gas or liquid through the device for exposing the gas hydrates to heat. The device for exposing the gas hydrates to heat also can be movable, so it can be maintained in close proximity to or in contact with the gas hydrates for continued efficient gasification of the hydrates.

Other References

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Inventors

Assignee

Application

No. 950247 filed on 10/14/1997

US Classes:

585/15, HYDRATE OR PRODUCTION THEREOF62/45.1, STORAGE OF SOLIDIFIED OR LIQUIFIED GAS (E.G., CRYOGEN)62/54.2, Controlled conversion of solidified gas to another phase62/54.3, Storing solidified gas585/800, PURIFICATION, SEPARATION, OR RECOVERY585/801By conversion of solid to gas, e.g., sublimation, etc., or by melting or squeezing out liquid from solid natural source

Field of Search

585/15, HYDRATE OR PRODUCTION THEREOF585/800, PURIFICATION, SEPARATION, OR RECOVERY585/801, By conversion of solid to gas, e.g., sublimation, etc., or by melting or squeezing out liquid from solid natural source62/54.3, Storing solidified gas62/45.1, STORAGE OF SOLIDIFIED OR LIQUIFIED GAS (E.G., CRYOGEN)62/54.2Controlled conversion of solidified gas to another phase

Examiners

Primary: Griffin, Walter D.
Assistant: Preisch, Nadine

Attorney, Agent or Firm

US Patent References

2270016, 2356407, 2375559, 2683972, 2904511, 3170870, 3514274, 3856492, 3888434, 3954921, Gas-liquid contacting method and scrubber used therefor
Issued on: 05/04/1976
Inventor: Yoshida ,   et al.
3975167, Transportation of natural gas as a hydrate
Issued on: 08/17/1976
Inventor: Nierman
4696338, Latent heat storage and transfer system and method
Issued on: 09/29/1987
Inventor: Jensen ,   et al.
4915176, Method of transporting a hydrate forming fluid
Issued on: 04/10/1990
Inventor: Sugier, et al.
4920752, Apparatus and process for storing hydrate-forming gaseous hydrocarbons
Issued on: 05/01/1990
Inventor: Ehrsam
4930319, Sublimation method
Issued on: 06/05/1990
Inventor: Bee, et al.
5473904, Method and apparatus for generating, transporting and dissociating gas hydrates
Issued on: 12/12/1995
Inventor: Guo, et al.
5536893, Method for production of gas hydrates for transportation and storage
Issued on: 07/16/1996
Inventor: Gudmundsson
5562891, Method for the production of carbon dioxide hydrates
Issued on: 10/08/1996
Inventor: Spencer, et al.
5713416, Methods of decomposing gas hydrates
Issued on: 02/03/1998
Inventor: Chatterji, et al.
5806316Apparatus and method for producing working fluid for a power plant
Issued on: 09/15/1998
Inventor: Avakov, et al.

Foreign Patent References

  • WO93/01153 WO. 01/19/1993

International Classes

C07C 007/20
F17C 062/542

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