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METHOD FOR EFFICIENT USE OF HYDROGEN IN AROMATICS PRODUCTION FROM HEAVY AROMATICS

  • US 20100160699A1
  • Filed: 12/23/2008
  • Published: 06/24/2010
  • Est. Priority Date: 12/23/2008
  • Status: Abandoned Application
First Claim
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1. A method for integrating the hydrogen flow in a product-producing reaction system having at least one first reaction unit that consumes a large quantity of hydrogen at high purity and at least one second reaction unit that does not consume a large quantity of hydrogen, but which requires the presence of hydrogen and can tolerate the presence of hydrogen at low purity, said method comprising:

  • (a) reacting a first reactant and an essentially pure hydrogen stream in the at least one first reaction unit to produce a first effluent stream;

    (b) fractionating the first effluent stream to recover at least one first product stream;

    (c) introducing a low-purity hydrogen-containing stream to the at least one first product stream from step (b) to form a combined stream;

    (d) reacting the combined stream to form a second product stream comprising hydrogen, volatile compounds, and a product;

    (e) separating the hydrogen and volatile components from the product to form a gaseous stream and a product-containing stream;

    (f) purifying the gaseous stream to provide an essentially pure hydrogen-containing stream;

    (g) increasing the pressure on the essentially pure hydrogen-containing stream and introducing it to the at least one first reaction unit of step (a); and

    (h) recovering the product.

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