Reduced biodegradability in a polymer flood process
US4517101A · kind A · utility
5Cited by
3References
5Claims
0Family size
Inventors
Key dates
| Filing date | Aug 22, 1983 |
| Grant date | May 14, 1985 |
| Priority date | — |
| Expiry date | Aug 22, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/936
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In a polymer flood, where bacterial contamination frequently causes a loss in viscosity of the polymer, the viscosity of the polymer solution is maintained by the use of a xanthan polymer modified by methylation of a portion of the subunit sugar residues of the xanthan base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.