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:
Jan. 17, 2023
Filed:
Oct. 10, 2019
Arkema Inc., King of Prussia, PA (US);
Anne M. Pigamo, Francheville, FR;
Jay F. Miller, Downingtown, PA (US);
Emmanuel D. Boussaire, Decines Charpieu, FR;
Kevin Hisler, Chaponnay, FR;
Arkema Inc., King of Prussia, PA (US);
Abstract
Disclosed is a step in the purification process of hydrochlorofluoroolefin refrigerants that are made from processes wherein 1,1,3,3 tetrachloropropene (R1230za) or 1,1,1,3,3-pentachloropropane (R240fa) is reacted with HF in excess. The purification process employs a cold-temperature reaction with a base to remove the HF and any HCl. The process prevents an increase in unwanted organic side-products, particularly trifluoropropyne (TPS), and simultaneously does not reduce the amount of the desired hydrochlorofluoroolefin refrigerant produced. The process also can have an optional step whereby hydrochlorofluoroolefin refrigerant and other organics are removed from aqueous process stream or streams resulting from the reaction with the base. The organics removed can be recycled. This optional step advantageously can increase the yield of the desired refrigerant, while decreasing the environmental load of the plant, by purifying the resulting aqueous process streams.