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Method for the Degrading of Synthetic Polymers and Device for Carrying Out Said Method

  • US 20160040074A1
  • Filed: 03/27/2014
  • Published: 02/11/2016
  • Est. Priority Date: 04/04/2013
  • Status: Active Grant
First Claim
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1. A method for breaking down synthetic polymers comprising the steps ofa) producing a melt of synthetic polymers,b) purifying the polymer melt by passing the polymer melt through at least one melt filter,c) transferring the purified polymer melt into at least one first reactor, wherein the purified polymer melt in the at least one first reactor is conducted from a lower region (sump region) to an upper region (head region) of the at least one first reactor with heating to temperatures between 300°

  • C. and 370°

    C., wherein the polymers in the at least one first reactor are cleaved into oligomers,d) transferring the oligomer mixture formed in the at least one first reactor to at least one second reactor, wherein the oligomer mixture in the at least one second reactor is conducted from a lower region (sump region) to an upper region (head region) of the at least one second reactor with heating to 380°

    C. to 450°

    C., wherein the oligomers in the at least one second reactor are broken down to short-chain hydrocarbons in the presence of at least one clay mineral as depolymerization catalyst,e) removing the short-chain hydrocarbons having C3-C22 that are formed in the at least one second reactor to at least one precondenser, wherein the short-chain hydrocarbons exiting from the at least one second reactor are cooled in the at least one precondenser; and

    f) introducing the short-chain hydrocarbons that are cooled in the at least one precondenser into at least one main condenser, wherein the short-chain hydrocarbons exiting from the at least one precondenser are liquefied in the at least one main condenser.

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