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US 10,870,068 B2Granted
Process and apparatus for recovering light hydrocarbons by sponge absorption
AssigneeUop LLC
InventorsKiran Ladkat, Hemant Mahajan, Neeraj Tiwari
Life of this patent
Estimating the term…
Abstract
A gas stream comprising LPG and naphtha hydrocarbons is absorbed with a sponge absorbent to recover LPG and naphtha hydrocarbons. The gas stream may comprise stripper off gas and/or PSA tail gas. An absorbent stream may be a stripped stream. The stripper off gas stream and the stripped stream may be obtained from a stripper that is downstream of a hydroprocessing unit.
Claims19
A process for recovering hydrogen and hydrocarbons comprising:
- adsorbing impurities from hydrogen in a gaseous stream to provide a hydrogen stream and a tail gas stream comprising hydrocarbons;
- absorbing LPG hydrocarbons from said tail gas stream to produce an absorbent stream and an absorption stream comprising LPG and hydrogen;
- and
- absorbing LPG hydrocarbons from said absorption stream to provide an absorption off-gas stream and a hydrocarbon-rich absorption stream.
1 more element
A process for recovering hydrogen and hydrocarbons comprising:
- absorbing LPG hydrocarbons from a stripper off gas stream to produce an absorbent stream and an absorption stream comprising LPG and hydrogen;
- absorbing LPG hydrocarbons from said absorption stream to provide an absorption off-gas stream and a hydrocarbon-rich absorption stream;
- and
- adsorbing impurities from hydrogen in said absorption off-gas stream to provide a hydrogen stream and a tail gas stream comprising hydrocarbons.
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An apparatus comprising:
- a first absorber in communication with an overhead line of a stripper and in downstream communication with a PSA unit;
- a second absorber in communication with an overhead line of said first absorber and a bottoms line of said stripper;
- and
- a fractionation column in downstream communication with said first absorber column via a bottoms line and first absorber column being in downstream communication with the fractionation column.
1 more element
Dependencies are inferred from the claim text.