Cross-linking titanium & zirconium chelates & their use

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

1987-03-10

1989-02-28

Shippen, Michael L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

166308, C07F 306, C07F 728

Patent

active

048087394

ABSTRACT:
Water-soluble N,N-bis-(2-hydroxyethyl)glycine/metal chelates represented by the formula: ##STR1## 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 crosslinking agents in hydraulic fracturing fluids and in gels that are used for selectively plugging permeable zones in subterranean formations or for plugging subterranean leaks.

REFERENCES:
patent: 2824114 (1958-02-01), Bostwick
patent: 2824115 (1958-02-01), Beacham et al.
patent: 3457208 (1969-07-01), Sullivan
patent: 3888312 (1975-06-01), Tiner
patent: 4077941 (1978-03-01), Stephen
patent: 4460751 (1984-07-01), Hanlon et al.
Yoshino et al., Bulletin of the Chemical Society of Japan, vol. 46, p. 2899 (1973).

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