Method for separating hf from hf/halogenated hydrocarbon mixtures using ionic liquids
AssigneeHoneywell International Inc.
InventorsHaiyou WANG, Hsueh Sung TUNG
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Abstract
The present invention relates to an ionic liquid comprised of a salt, the anion of which is Cl−, F−, and (HF)nF−(n=1.0−4.0), or combination thereof. In another embodiment, the present invention relates to a process of separating HF from a first mixture comprised of at least one halogenated hydrocarbon and HF which comprises contacting the mixture with an ionic liquid comprised of a salt, the anion of which is Cl−, F−, and (HF)nF− where n is a positive number ranging from 1 to 4, inclusive 4.0), to form a second mixture comprised of HF, halogenated hydrocarbon and said ionic liquid, extracting a solution comprising HF therefrom, and recovering HF therefrom.
Claims31
A method for recovering HF from a mixture comprising HF and a halogenated hydrocarbon comprising contacting the mixture with an ionic liquid, wherein the ionic liquid is a salt and wherein the anion of the ionic liquid is Cl−, F−, and (HF)nF−, wherein n is a positive number ranging from 1 to 4, inclusive, or combination thereof to produce a product comprised of HF and said ionic liquid, the weight ratio of the ionic liquid to HF ranging from about 0.1:1 to about 100:1, and extracting therefrom a solution comprised of HF and separating HF from said solution.
Dependencies are inferred from the claim text.