Gas separation: processes – Liquid contacting – And recycle or reuse of contact liquid for further contact
Reexamination Certificate
2006-02-28
2006-02-28
Lawrence, Frank M. (Department: 1724)
Gas separation: processes
Liquid contacting
And recycle or reuse of contact liquid for further contact
C095S235000
Reexamination Certificate
active
07004996
ABSTRACT:
Process for the removal of the hydrogen sulfide contained in natural gas, which comprises:a. absorbing the hydrogen sulfide present in natural gas by means of a virgin naphtha, in an adsorbing device and with a molar ratio virgin naphtha/H2S ranging from 0.85 to 1.5;b. recovering the hydrogen sulfide absorbed by the virgin naphtha as head product of a distillation column operating with a reflux having a temperature of between −5 and −20° C.;c. recycling the virgin naphtha discharged as bottom product of the distillation column, to the absorption step (a);d. introducing the hydrogen sulfide back to the production field of natural gas, at the temperature and pressure conditions present at the head of the distillation column.
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