Method for increasing light olefine yield by conversion of heavy hydrocarbon fraction of product to light olefines

Method for increasing light olefine yield by conversion of heavy hydrocarbon fraction of product to light olefines

  • CN 1,138,731 C
  • Filed: 09/25/1998
  • Issued: 02/18/2004
  • Est. Priority Date: 10/03/1997
  • Status: Active Grant
First Claim
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1. method that in oxygenatedchemicals production conversion of olefines method, improves ethylene yield, this method comprises:

  • under 250-600 ℃

    , oxygenate feedstock contacts in first conversion zone with the catalyzer of phosphorous aluminosilicate molecular sieves, contains the ethene cut and contains C thereby generate 4+The product of hydrocarbon fraction;

    From contain the ethene cut, isolate and contain C 4+Hydrocarbon fraction;

    And the separated C that contains of at least a portion 4+The cut of hydro carbons contacts in first conversion zone with catalyzer.

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