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A METHOD FOR THE REMOVAL AND RECOVERY OF MONONUCLEAR AND POLYNUCLEAR AROMATIC CO-PRODUCTS PRODUCED IN A HYDROCARBON DEHYDROGENATION REACTION ZONE
A METHOD FOR THE REMOVAL AND RECOVERY OF MONONUCLEAR AND POLYNUCLEAR AROMATIC CO-PRODUCTS PRODUCED IN A HYDROCARBON DEHYDROGENATION REACTION ZONE
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机译:油气脱氢反应区单核和多核芳族副产物的去除和回收方法
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摘要
Polynuclear aromatic compounds (PNA's) produced as a by-product in a hydrocarbon dehydrogenation zone are removed and recovered by admixing the effluent from the dehydrogenation zone with a recycle stream containing mononuclear aromatic compounds (MNA's) and the resulting admixture is contacted with an adsorbent to reduce the concentration of MNA's and PNA's and to produce a stream comprising dehydrogenated hydrocarbons and dehydrogenatable hydrocarbons. The spent adsorbent recovered from the adsorption step containing MNA's and PNA's is regenerated by contacting with a hot hydrogen-rich gas to recover at least a portion of the MNA's and PNA's and to thereby regenerate the spent adsorbent. The hydrocarbon-containing effluent from the regeneration step is then separated into a MNA's -containing stream and a PNA's-containing stream and at least a portion of the MNA's-containing stream is recycled to the mixing step.
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