US 12,352,479 B2
Method and an apparatus for at least partially draining an operating system
Robert Low, Runcorn (GB)
Assigned to MEXICHEM FLUOR S.A. DE C.V., San Luis Potosi (MX)
Appl. No. 17/630,245
Filed by Mexichem Fluor S.A. de C.V., San Luis Potosi (MX)
PCT Filed Jul. 27, 2020, PCT No. PCT/GB2020/051798
§ 371(c)(1), (2) Date Jan. 26, 2022,
PCT Pub. No. WO2021/019227, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 1910839 (GB), filed on Jul. 30, 2019.
Prior Publication US 2022/0282895 A1, Sep. 8, 2022
Int. Cl. F25B 45/00 (2006.01); F25B 9/00 (2006.01)
CPC F25B 45/00 (2013.01) [F25B 9/008 (2013.01); F25B 2345/002 (2013.01)] 23 Claims
 
1. A method for at least partially draining an operating system, which contains a working fluid composition comprising carbon dioxide (R744) and a halogenated hydrocarbon, the method comprising:
transferring the working fluid from the operating system to a target container; and
contacting the working fluid with an absorptive bed before the working fluid is received by the target container,
wherein a total proportion of the halogenated hydrocarbon in the working fluid is about 10% to 35% by weight of the total working fluid,
wherein the contacting step is performed, at least in part, at a temperature of from about 60° C. to about 200° C.