Polymer-containing solvent purifying process
US8083947B2 · kind B2 · utility
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19References
15Claims
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Key dates
| Filing date | Feb 24, 2009 |
| Grant date | Dec 27, 2011 |
| Priority date | — |
| Expiry date | Sep 28, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/3092
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Polymer-containing solution can be purified and the solvent reused by subjecting the solution to microfiltration using tubular filters having an average pore diameter of less than 1 μm and a filtration pressure of at least 0.35 MPa. This method is particularly useful for reclaiming and reusing solvents that are used in the development or chemical washout of flexographic printing plates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.