Process for the production of SAP
US7398606B2 · kind B2 · utility
1Cited by
3References
19Claims
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Key dates
| Filing date | Sep 4, 2002 |
| Grant date | Jul 15, 2008 |
| Priority date | — |
| Expiry date | Sep 4, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A continuous process for the production of dried superabsorbent polymers (SAPs) the polymerization reaction is carried out either in an initially homogenous aqueous monomer solution (bulk aqueous solution polymerization) or in a heterogeneous water-in-oil reactant mixture (reverse phase suspension or emulsion polymerization) within a continuous closed polymerization reactor, then the resulting polymer gel is dried within a continuous moved bed in a closed dryer, avoiding the needs of standard intermediate maturity tank(s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.