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Waste processing

  • US 5,821,395 A
  • Filed: 06/05/1995
  • Issued: 10/13/1998
  • Est. Priority Date: 06/16/1994
  • Status: Expired due to Fees
First Claim
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1. A process for preparing a mixed vapor of lower hydrocarbons having a chlorine content of less than 50 ppm which comprises thermally cracking at a temperature of from 350°

  • -600°

    C. waste polymers containing chlorinated polymers in a reactor in the presence of a fluidizing gas and a fluidized bed of solid particulate fluidizable materials, and passing at a temperature of from 400°

    -600°

    C. the cracked products emerging from the fluidized bed through one or more guard beds comprising calcium oxide or a compound capable of giving rise to calcium oxide under the reaction conditions, the calcium oxide being of medium to high reactivity defined as >

    40°

    C. at 2 mins by BSS 6463;

    Part 3 (1987), Method 4;

    wherein the residence time of the cracked products in the guard beds is at least 0.3 seconds calculated on the basis of the volume of the calcium oxide reactor divided by the total gaseous flow through the reactor.

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