C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 11/02 (2006.01) C07C 15/46 (2006.01) C08F 6/28 (2006.01) C10B 53/00 (2006.01)
Patent
CA 2088585
A method is described for the recovery of high yields of monomers from waste and scrape polymeric materials with mini- mal amounts of char and tar. The process involves pyrolysis in a circulating fluid bed (CFB). The polymer is heated to a tempera- ture of about 650 °C to about 1000 °C at a rate of more than 500 °C/sec in less than two seconds. Heat is supplied to the CFB by a stream of hot sand heated in a separate combustor. The sand is also used as the circulating fluid bed material of the CFB. The process is essentially devoid of solid carbon char and non-monomeric liquid products.
Litt Robert D.
Paisley Mark A.
Akzo Nobel Chemicals Bv
Battelle Memorial Institute Pacific Northwest Division
Fetherstonhaugh & Co.
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