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Thermolysis and hydrogenolysis of polyethylene under steam pressure

✍ Scribed by Toshiaki Okui; Yoshiaki Ogo

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
575 KB
Volume
25
Category
Article
ISSN
0021-8995

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✦ Synopsis

Abstract

Thermolysis and hydrogenolysis of polyethylene under steam pressure were carried out by batchwise autoclave in the recovery of liquid petrochemical resources from waste polymers. Thermolysis of polyethylene under steam pressure occurred in the temperature range 400–475Β°C and reaction pressures up to 213 bar. The presence of steam is advantageous for an increase in liquid products and 450Β°C is an appropriate temperature for the formation of low molecular aromatic compounds. Hydrogenolysis of polyethylene was studied at 450Β°C and initial hydrogen pressure range of 10–100 bar under steam pressure. Over 80 wt % of the low‐boiling product was converted to saturated hydrocarbons at 40 bar hydrogen pressure, which corresponds to 1 mole hydrogen to 1 mole monomeric unit of polyethylene. The schemes for the thermolysis and the hydrogenolysis, especially the aromatization, are discussed.

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