Aluminum citrate preparations and methods

Details Aluminum citrate preparations and methods Aluminum citrate preparations and methods

C - Chemistry, Metallurgy

09

K

C09K 3/00 (2006.01) C07C 51/41 (2006.01) C07C 59/265 (2006.01) C07F 5/06 (2006.01) C09K 8/512 (2006.01) E21B 43/22 (2006.01)

Patent

CA 2162936

A method for the preparation, drying and use of a stable aluminum citrate solution is disclosed. The method involves first mixing a solution containing an aluminum-chloride compound having a molar ratio of aluminum to chloride greater than about 1:3 with an aqueous solution comprising citrate. This "starter" solution is agitated at a sufficient rate to keep the slurry moving while the pH of the mixture is adjusted to a level of about 5.0 to about 9Ø The final aluminum citrate product is used to crosslink water-soluble polymer in solution for the purpose of restricting water flow in subterranean formations. The resultant aluminum citrate solution may be used either as a liquid or dried prior to shipping and using at a remote location.

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