Ethylene production by steam cracking of normal paraffins

Ethylene production by steam cracking of normal paraffins

  • CN 102,811,984 A
  • Filed: 03/18/2011
  • Published: 12/05/2012
  • Est. Priority Date: 03/30/2010
  • Status: Active Application
First Claim
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1. method that is used to prepare the incoming flow that is fed to the steamed cracking unit of producing ethene, this method comprises:

  • (a) will comprise and comprise C 5-C 9The C of n-paraffin 5-C 9The process feeds stream of hydrocarbon is fed in the adsorption zone of A/Fn for the simulated moving bed adsorption disengaging zone of the about 0.92 time operation of about 0.90-, and is being positioned at selective retention n-paraffin on the sorbent material of adsorption zone, contains non-positive structure C with generation 5-C 9The raffinate stream of hydrocarbon;

    (b) strippant is sent in the desorption zone in the simulated moving bed adsorption disengaging zone as part strippant logistics at least, and taken out n-paraffin the sorbent material in being present in desorption zone, comprise C with generation 5-C 9The extract flow of n-paraffin and strippant;

    (c) in the extract fractionation zone, extract flow is separated into second process-stream that comprises strippant and comprises C 5-C 9The 3rd process-stream of n-paraffin;

    With (d) the 3rd process-stream is sent into the zone of cracking and produced ethene.

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