Pyrolysis method for increasing limonene production and novel oven to facilitate such method
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United States of America Patent
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Nov 2, 1999
Grant Date -
N/A
app pub date -
Sep 3, 1997
filing date -
Sep 3, 1997
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Expired
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Abstract
The amount of limonene produced during pyrolysis of scrap tire carcass or polyisoprene rubber can be increased by decreasing residence time of the isoprene gas produced during the thermal degradation of polyisoprene rubber in the high temperature reactor region of an oven. This is achieved by using a novel oven design which permits rapid expansion of the isoprene gas away from the high temperature reactor region of the oven to a cooler region where the gas forms limonene and condenses. This pyrolysis method also decreases the amount of soot produced while increasing the amount of limonene produced. Furthermore, this system readily enables separation of the solid, liquid and gas phases produced during pyrolysis.
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