The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 2022
Filed:
Jul. 06, 2020
Borealis Ag, Vienna, AT;
Sameer Vijay, Linz, AT;
Borealis AG, Vienna, AT;
Abstract
Disclosed is a process for treating plastic waste chips containing a blend of polypropylene and polyethylene in an amount of at least 83.0 wt.-% to less than 100 wt.-% and further containing C7 to C11 aldehydes in an amount of 8000 ppb to 20000 ppb and limonene in an amount of 5 ppm to 500 ppm, the process comprising subjecting said plastic waste chips, in a fixed bed without stirring under standard pressure or reduced pressure, to a gas flow for achieving a Reynolds number in the range of 35 to 1200 at a temperature in the range of 20° C. to a point 10° C. below the Vicat softening point (10N, ISO 306) of said plastic waste and recovering the treated plastic waste chips containing C7 to C11 aldehydes in a total amount of 50 ppb to less than 5000 ppb limonene in an amount of 0.5 to 5 ppm.