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Process for production of para-xylene incorporating pressure swing adsorption and simulated moving bed adsorption
Process for production of para-xylene incorporating pressure swing adsorption and simulated moving bed adsorption
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机译:变压吸附与模拟移动床吸附相结合的对二甲苯生产工艺
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摘要
A pressure swing adsorption process to separate para-xylene and ethylbenzene from C8 aromatics which uses a para-selective, non-acidic, medium pore molecular sieve of the MFI structure type and is operated isothermally in the vapor phase at elevated temperatures and pressures is integrated with simulated moving bed adsorption (SiMBAC) to produce para-xylene product. A fixed bed of adsorbent is saturated with pX and EB, which are preferentially adsorbed, the feed is stopped, and lowering the partial pressure desorbs the pX and EB. The process effluent, which is rich in pX and EB, is subjected to SiMBAC to obtain para-xylene product.
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