Patent · US Active

Method for direct ammonolysis of polycarbonate-containing materials and products

US9328046B2 · kind B2 · utility

0Cited by

8References

19Claims

0Family size

Assignee

SAUDI BASIC INDUSTRIES CORPORATION · SA

Inventors

Alexander Stanislaus · Kanchinakote, IN
Venkata Ramanarayanan Ganapathy Bhotla · Bengaluru, IN
P S Sreenivasan · Bengaluru, IN
Philip Wesley Bell · Mount Vernon, US

Key dates

Filing date	Oct 15, 2013
Grant date	May 3, 2016
Priority date	—
Expiry date	Dec 29, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/62
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A method for recovering a dihydroxy aromatic compound and urea from a polycarbonate-containing composition comprising a polycarbonate and a phosphorus-containing flame retardant, comprising contacting the composition with ammonia in the presence of a swelling solvent for a time sufficient to depolymerize the polycarbonate producing a dihydroxy aromatic compound and urea.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.