U.S. patents available from 1976 to present.
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Process for separating selected components from multi-component natural gas streams

Patent 5660603 Issued on August 26, 1997. Estimated Expiration Date: Icon_subject September 5, 2015. Estimated 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.

Patent References

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Separation of acidic gas constituents from gaseous mixtures containing the same
Patent #: 4044100
Issued on: 08/23/1977
Inventor: McElroy, Jr.

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Inventors

Assignee

Application

No. 523719 filed on 09/05/1995

US Classes:

48/127.5, Process including chemical reaction48/127.3, METHANE (NATURAL GAS) -CONTAINING PRODUCT, OR TREATMENT OR RECOVERY PROCESS48/190, DISTRIBUTION62/632, Liquid contact585/15HYDRATE OR PRODUCTION THEREOF

Examiners

Primary: McMahon, Timothy M.

Attorney, Agent or Firm

Foreign Patent References

  • 610237 CA 12/13/1960
  • 0031432 JP 03/13/1981
  • 3-250081 JP 07/13/1991
  • 3-364198 JP 10/13/1991
  • 4141217 JP 05/13/1992
  • 538429 JP 02/13/1993
  • 5146637 JP 06/13/1993
  • 568290 GB 03/13/2012

International Class

C01B 003/32

Abstract

A process for separating components of gas mixtures which have different hydrate forming characteristics which uses an aqueous liquid to absorb one of the gases preferentially by attaining conditions slightly above the catastrophic point at which gas hydrates form. Specifically, the separation of gas mixtures containing light hydrocarbons and carbon dioxide is accomplished without significantly reducing the pressure of the carbon dioxide or without requiring significant amounts of heat energy for regeneration.

Other References

  • Hezog et al, "Feasability . . . In the Deep Ocean", Environmental Progress (vol. 10, No. 1) 1991
  • Baes et al, "Options for the Collection and Disposal of Carbon Dioxide", May 1980
  • Baes et al "The Collection, Disposal and Storage of Carbon Dioxide", 1980
  • Engless, "Clathrate Hydrates"; ACS, 1993
  • E. P. Sloan, "Natural Gas Hydrate . . . Art", Reue de l'Institute, Francais Du Petrole, 1990
  • Wilcox et al, "Natural Gas Hydrates", IOE Chem., vol. 33, No. 5 Sep. 1939
  • Riki Kobayashi, Principle Investigator; Solid Deposition in Hydrocarbon Systems--Hydrates of Natural Gases; Jan. 1, 1990-Dec. 31, 1994
  • L. Kohl & Fred C. Riesenfeld; Gas Purification Fourth Edition; pp. 247-297
  • John Happel, et al.; A Novel Apparatus; The Study of Separation of Nitrogen From Methan by Hydrate Formation Using a Novel Apparatus; pp. 412-424
  • R. Kobayashi, et al.;Solubility Measurements of Methane and Ethane in Water at Hydrate Conditions; Sep., 1995
  • Gary K. Jacobs and Derrill M. Kerrick; Methane: An Equation of State with Application to the Ternary System H2 O--CO2 --CH4 ; Sep. 4, 1980; pp. 607-614
  • John A. Nlghswande; Journal of Chemical and Engineering Data; 1989; Solubilities of Carbon Dioxide in Water and 1 Wt % NaCl Solution at Pressures Up to 10 Mpa and Temperatures from 80 to 200C; pp. 355-360
  • Sanggono Adisasmlto; Journal of Chemical and Engineering Data; 1991; Hydrates of Carbon Dioxide and Methane Mixtures; pp. 68-71
  • Kazunari Ohgaki; Journal of Chemical Engineering of Japan; 1993; Formation of CO2 Hydrate in Pure and Sea Waters; pp. 558-56
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