Patent ID: 6544319
Filing Date: 2003-04-08
Classification: B01D,C07C,Y02C,Y02P,Y10S

Abstract:
A process for purifying hexafluoro-1,3-butadiene (HFBD), said process comprising:contacting a composition containing said HFBD with an adsorbent to remove from said HFBD at least two impurities selected from the group consisting of water, an alcohol, hydrofluoric acid and a fluorinated olefin, wherein said adsorbent is a solid having an average pore diameter of about 5 Ã¥ and said adsorbent is contacted with said HFBD at a rate of at least 2.7 kg of said HFBD per hour; and recovering from said adsorbent a purified HFBD product containing at least 99.9 vol. % HFBD, a reduced amount of said impurities and less than 0.1 vol. % hexafluoro-2-butyne.