Process for recovering phthalic anhydride and hydrogen chloride from plastic materials
AssigneeMazda Motor Corporation
InventorsToshiki Takahashi, Tatsuto Fukushima, Yoshio Tanimoto, Akemi Muraoka
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Abstract
There is provided a process to recover phthalic anhydride from a plastic material which contains a phthalate ester as a plasticizer comprising the steps of: (a) heating the plastic material so that the plastic material is gasified to produce a first product, (b) contacting the first product with alumina catalyst so that the product is catalytically cracked to produce a first catalytically cracked product comprising phthalic anhydride; and (c) recovering phthalic anhydride from the first catalytically cracked product.
Claims9
A process to recover phthalic anhydride from a plastic material which contains a plasticizer comprising a phthalate ester comprising the steps of:
- (a) heating the plastic material so that the plastic material is gasified to produce a gaseous first product,
- (b) contacting the gaseous first product with alumina catalyst so that the gaseous first product is catalytically cracked to produce a first catalytically cracked product comprising phthalic anhydride;
- and
- (c) recovering phthalic anhydride from the first catalytically cracked product.
Dependencies are inferred from the claim text.