Methods to separate halogentated olefins from 2-chloro-1,1,1,2-tetrafluoropropane using a solid adsorbent
AssigneeHoneywell International Inc.
InventorsDaniel C. Merkel, Konstantin A. Pokrovski, Hsueh Sung Tung
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Abstract
The present invention provides a method for separating halocarbons. In particular, the invention provides a method for separating halogenated olefin impurities from 2-chloro-1,1,1,2-tetrafluoropropane (HCFC-244bb) using a solid adsorbent, particularly activated carbon. More particularly the invention pertains to a method for separating 2-chloro-3,3,3-trifluoro-propene (HCFO-1233xf) from HCFC-244bb, which are useful as intermediates in the production of 2,3,3,3-tetrafluoropropene (HFO-1234yf).
Claims13
A method for separating the component parts of a binary azeotrope consisting of 2 chloro-1,1,1,2-tetra-fluoropropane (HCFC-244bb) and 2-chloro-3,3,3-trifluoro-propene (HCFO-1233xf) using a solid adsorbent that adsorbs the HCFO-1233xf, whereby the HCFC-244bb is separated therefrom and wherein the solid adsorbent comprises activated carbon having a minimum iodine number within the range of 900 to 1200.
A method of separating a mixture of HCFC-244bb and HCFC-1233xf comprising passing the mixture in a liquid or gaseous form through an activated carbon solid adsorbent having a minimum iodine number within the range of 900 to 1200, whereby the activated carbon adsorbs the HCFO-1233xf and then essentially pure HCFC-244bb can be recovered.
Dependencies are inferred from the claim text.