Method for preparing dilute polymer solutions
US4603154A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1985 |
| Grant date | Jul 29, 1986 |
| Priority date | — |
| Expiry date | Jun 19, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2300/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for preparing dilute aqueous polymer solutions, especially dilute aqueous partially hydrolyzed polyacrylamide solutions, for use in secondary and tertiary oil recovery processes. The method comprises producing a concentrated polymer solution in a polymerization reactor and diluting the resulting gel-like, relatively high concentration polymer solution to obtain a free-flowing, relatively low concentration polymer solution by means of a staged dilution process. In each stage, an aqueous diluent is combined with the polymer solution to produce a nonuniform mixture which is maintained in a vessel in a quiescent state until the mixture becomes uniform. The stages are repeated as many times as necessary until the free-flowing, relatively low concentration polymer solution is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.