Cross-linking titanium and zirconium chelates and their use

Details Cross-linking titanium and zirconium chelates and their use Cross-linking titanium and zirconium chelates and their use

E - Fixed Constructions

21

F

31/13

E21F 15/08 (2006.01) C07F 7/00 (2006.01) C09K 8/512 (2006.01) C09K 8/68 (2006.01)

Patent

CA 1281174

Title CROSS-LINKING TITANIUM & ZIRCONIUM CHELATES & THEIR USE Abstract of the Disclosure Water-soluble N,N-bis-(2-hydroxyethyl)- glycine/metal chelates represented by the formula: Image wherein R is H or alkyl (1-12C); M is Ti or Zr; k is a number in the range between 0 and 1, p is a number in the range between 1 and 2, and k + p = 2 (in particular embodiments: k = 1 and p = 1; k = 0 and p = 2; and k = 0.5 and p = 1.5). The chelates can be used as cross- linking agents in hydraulic fracturing fluids and in gels that are used for selectively plugging permeable zones in subterranean formations or for plugging subterranean leaks.

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