PROCESS AND APPARATUS FOR RECOVERING HYDROGEN FROM HYDROPROCESSED STRIPPER OFF GAS
First Claim
Patent Images
1. A hydroprocessing process comprising:
- hydroprocessing a hydrocarbon feed stream in a hydroprocessing reactor to provide a hydroprocessing effluent stream;
separating said hydroprocessing effluent stream in a separator to provide a gaseous stream and a liquid stream;
stripping light gases from said liquid stream to provide a stripper off gas stream and a stripped hydroprocessed stream;
compressing said stripper off gas stream; and
recovering hydrogen from said stripper off gas stream.
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Abstract
A stripper off gas stream from a low pressure hydroprocessing unit may be routed to a hydrogen recovery unit to recover hydrogen. The stripper off gas stream may be scrubbed of acid gases and then compressed to hydrogen recovery pressure before it is subjected to hydrogen recovery such as in a pressure swing adsorption unit to recover high purity hydrogen.
6 Citations
20 Claims
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1. A hydroprocessing process comprising:
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hydroprocessing a hydrocarbon feed stream in a hydroprocessing reactor to provide a hydroprocessing effluent stream; separating said hydroprocessing effluent stream in a separator to provide a gaseous stream and a liquid stream; stripping light gases from said liquid stream to provide a stripper off gas stream and a stripped hydroprocessed stream; compressing said stripper off gas stream; and recovering hydrogen from said stripper off gas stream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A hydroprocessing process comprising:
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hydroprocessing a hydrocarbon feed stream in a hydroprocessing reactor at a pressure of no more than 6.9 MPa (gauge) (1000 psig) to provide a hydroprocessing effluent stream; separating said hydroprocessing effluent stream in a separator to provide a gaseous stream and a liquid stream; stripping light gases from said liquid stream to provide a stripper off gas stream and a stripped hydroprocessed stream; compressing said stripper off gas stream; and recovering hydrogen from said stripper off gas stream by adsorbing impurities from hydrogen in said stripper off gas stream to provide a hydrogen stream. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A hydroprocessing apparatus comprising:
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a hydrotreating reactor; a separator in communication with said hydrotreating reactor; a stripping column in communication with a bottoms line of said separator; a compressor in communication with an overhead line from said stripping column; and a hydrogen recovery unit in communication with an overhead of said stripping column. - View Dependent Claims (18, 19, 20)
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Specification