PYROLYSIS OF POLYCARBONATE-CONTAINING MATERIAL IN COMBINATION WITH PHOSPHORUS-CONTAINING ORGANIC COMPOUND FOR THE RECOVERY OF RAW MATERIALS
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United States of America
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Feb 13, 2025
app pub date -
Dec 20, 2022
filing date -
Dec 20, 2022
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Abstract
The invention relates to a method for pyrolysis of polycarbonate-containing material in order to recover raw materials. The method comprises: (a) introducing material intended for the pyrolysis, at least comprising a polycarbonate-containing compound and an entire amount of phosphorous, organic compound, into a reactor, the entire amount relative to the entire weight of the material intended for pyrolysis having a ratio of at least 0.01 wt. % phosphor with a formal oxidation number of +5; (b) decomposing, at a temperature of 300° C. to 700° C., at least the material intended for pyrolysis introduced into the reactor in step (a) and obtaining a product that is present in the gaseous phase as the pyrolysate and of pyrolysis residues that are present in a non-gaseous phase; (c) cooling the removed pyrolysate to a temperature of less than 300° C. while obtaining a pyrolysis product, selected from pyrolysis condensate, pyrolysis sublimate or a mixture thereof.
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