发明名称 |
Catalytic cracking process. |
摘要 |
<p>A hydrocarbon stream is cracked in Plant A to produce a hot gaseous stream which is separated in a fractionator B. A gaseous stream containing hydrogen and C1-C4 hydrocarbons is taken from the fractionator B, is raised in pressure in compressor C and is cooled in a heat exchanger D. The cooled gaseous stream is separated in a demethaniser E, and an off-gas comprising hydrogen and C1 to C3 hydrocarbons is withdrawn from the demethaniser E. The off-gas is subjected to separation by pressure swing adsorption or temperature swing adsorption at an adsorption temperature of about 0 to about 250 DEG C in a bed of adsorbent which selectively adsorbs ethylene and propylene, thereby adsorbing substantially all of the ethylene and propylene from the gas stream. The ethylene and/or propylene is recovered upon bed regeneration. <IMAGE></p> |
申请公布号 |
EP0655492(A2) |
申请公布日期 |
1995.05.31 |
申请号 |
EP19940308703 |
申请日期 |
1994.11.24 |
申请人 |
THE BOC GROUP, INC. |
发明人 |
RAMACHANDRAN, RAMAKRISHNAN;DAO, LOC H. |
分类号 |
B01D53/72;B01D53/04;C07C7/13;C07C11/04;C07C11/06;C10G5/02;C10G70/04;(IPC1-7):C10G70/04 |
主分类号 |
B01D53/72 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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