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:
Jul. 21, 2020
Filed:
Feb. 07, 2018
Honeywell International Inc., Morris Plains, NJ (US);
Terris Yang, East Amherst, NY (US);
Hsueh Sung Tung, Getzville, NY (US);
Honeywell International Inc., Morris Plains, NJ (US);
Abstract
A process for the simultaneous removal of iron and phosphate ions from a chlorinated hydrocarbon waste stream, such as a waste stream derived from a process for manufacturing 1,1,1,3,3-pentachloropropane (HCC-240fa) and/or 1,1,1,3-tetrachloropropane (HCC-250fb). The waste stream contains at least one of chlorinated hydrocarbons, tributyl phosphate (TBP) and/or triethyl phosphate (TEP), iron, FeCland/or FeCl, a TBP-FeClcomplex and/or a TBP-FeClcomplex, and a TEP-FeClcomplex and/or a TEP-FeClcomplex, and is subjected to thermal oxidation to generate a second, aqueous waste stream containing at least one of hydrogen chloride (HCl), FeCland/or FeCl, and HPO. The second waste stream is exposed to a base to generate a precipitate including at least one insoluble compound selected from the group consisting of FePO, Fe(OH), and Ca(PO), and the precipitate is separated from the second waste stream to produce a liquid phase including only trace amounts of iron and phosphate ions.