C - Chemistry – Metallurgy – 01 – G
Patent
C - Chemistry, Metallurgy
01
G
C01G 28/00 (2006.01) C01G 28/02 (2006.01) A62D 3/00 (2006.01)
Patent
CA 2056241
PROCESS FOR CONVERTING HEXAFLUOROARSENIC ACID OR ANY SALT THEREOF TO ARSENIC ACID OR SALT THEREOF WHICH CAN THEN BE RENDERED NONHAZARDOUS ABSTRACT OF THE DISCLOSURE The present invention provides a process for the conversion of hazardous hexafluoroarsenic acid or any salt thereof to arsenic acid or salt thereof which can be rendered nonhazardous. In particular, the hexafluoroarsenic acid or salt is converted to arsenic acid or salt which can be converted to a water insoluble salt. Known insolubilization and stabilization technology then renders the material nonhazardous. The present process involves converting hexafluoroarsenic acid or salt thereof contained in an aqueous mixture to arsenic acid or salt thereof. The process comprises the steps of: (a) adding acid selected from the group consisting of sulfuric acid, arsenic acid, perchloric acid, and mixtures thereof to the aqueous mixture in an amount sufficient to catalyze the hydrolysis of the hexafluoroarsenic acid or salt thereof and raising the temperature of the aqueous mixture before, during, or after the acid addition sufficient to remove substantially all of the hydrogen fluoride in subsequent step (b); (b) passing an inert gas through the heated acid mixture steam in a quantity sufficient to remove substantially all of the hydrogen fluoride in the heated acid mixture from the heated acid mixture; and (c) separating substantially all of the hydrogen fluoride from the heated acid mixture whereupon the hexafluoroarsenic acid or salt thereof converts substantially to arsenic acid or salt thereof. 6878k
Frick Douglas Gene
Redmon Charles Lewis
Smith Robert Andrew
Subbanna Somanahalli Naranappa
Alliedsignal Inc.
Gowling Lafleur Henderson Llp
LandOfFree
Process for converting hexafluoroarsenic acid or any salt... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for converting hexafluoroarsenic acid or any salt..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for converting hexafluoroarsenic acid or any salt... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1408224