Organo-metallic compounds
US5089149A · kind A · utility
15Cited by
11References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1989 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Dec 1, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/922
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An organometallic compound which is the reaction product of (a) a zirconium halide or oxyhalide, (b) a polyol and (c) an alpha-hydroxy acid is claimed. The preferred polyol is sorbitol and preferred alphahydroxy acids are citric, malic or lactic acid. The compounds find use as cross-linking agents in fracturing fluids employed in the hydraulic fracturing of oil or gas-containing subterranean strata. The claimed compounds can be used to produce a slow or delayed gel formation in such fluids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.