Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By addition of extraneous agent – e.g. – solvent – etc.
Reexamination Certificate
2005-02-14
2008-12-30
Griffin, Walter D (Department: 1797)
Chemistry of hydrocarbon compounds
Purification, separation, or recovery
By addition of extraneous agent, e.g., solvent, etc.
C208S189000
Reexamination Certificate
active
07470829
ABSTRACT:
The natural gas arriving through pipe1is deacidified by being brought into contact with a solvent in column C2.The solvent charged with acid compounds is regenerated in zone R. The purified gas evacuated by pipe9includes some of the solvent. The method enables the solvent contained in the purified gas to be extracted. In zone ZA, the purified gas is brought into contact with a non-aqueous ionic liquid whose general formula is Q+A−, where Q+designates an ammonium, phosphonium, and/or sulfonium cation, and A−designates an anion able to form a liquid salt. The solvent-impoverished purified gas is evacuated through pipe17. The ionic liquid charged with solvent is regenerated by heating in an evaporator DE. The solvents separated from the ionic liquid in evaporator DE are recycled.
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Barrere-Tricca Cecile
Cadours Renaud
Lecomte Fabrice
Magna Lionel
Antonelli, Terry Stout & Kraus, LLP.
Griffin Walter D
Institut Francais du Pe'trole
Young Natasha
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