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Combined process for recovering hydrogen, ethylene, ethane or separating ethylene cracked gas from dry gas of refinery plants
Combined process for recovering hydrogen, ethylene, ethane or separating ethylene cracked gas from dry gas of refinery plants
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机译：从炼油厂的干气中回收氢气，乙烯，乙烷或从乙烯裂解气中分离出来的联合工艺
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摘要
This application provides processes for recovering hydrogen, ethylene and ethane from dry gas or separating ethylene cracked gas from dry gas of refinery plants, wherein a hydrating separation may be combined with for example a freezing or absorbing separation so as to separate a multiple gas mixture. The process may include for example: providing a dry gas or ethylene cracked gas to be separated by hydrating separation into a hydrating reactor to produce a hydrate comprising methane and nitrogen and a first gas mixture comprising hydrogen, ethane, and ethylene; removing the hydrate from the first gas phase mixture; further separating the first gas phase mixture of comprising hydrogen, ethylene and ethane in a conventional freezing or absorbing separation; and providing the hydrate produced in the hydration reactor into a hydrate decomposer wherein the hydrate is decomposed under the conditions of heating or decompression to obtain a second gas mixture comprising methane and nitrogen and less amount of ethane and ethylene.
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