John Z Chodur

US Patent:

6544319, Apr 8, 2003

Filed:

Jan 16, 2002

Appl. No.:

10/050352

Inventors:

Steven Arnold Krouse - Tamaqua PA
John Chodur - Nesquehoning PA

Assignee:

Air Products and Chemicals, Inc. - Allentown PA

International Classification:

B01D 5304

US Classification:

95126, 95131, 95141, 95148, 95902, 570179

Abstract:

An HFBD purification process includes: (a) contacting a composition containing HFBD with an adsorbent to remove from the HFBD at least two impurities selected from the group consisting of water, an alcohol, hydrofluoric acid and a fluorinated olefin, wherein the adsorbent is a solid having an average pore diameter of about 5 and the adsorbent is contacted with the HFBD at a rate of at least 2. 7 kg of the HFBD per hour; and (b) recovering from the adsorbent a purified HFBD product containing at least 99. 9 vol. % HFBD, a reduced amount of the impurities and less than 0. 1 vol. % hexafluoro-2-butyne. Alternatively, the process can be conducted at any contacting rate to produce 99. 96 vol. % HFBD. The process can also be conducted at any contacting rate in a bed within a column having a length of at least 30 cm and an inner diameter of at least 2. 5 cm.