Method of filtering cellulose acetate solutions as well as a plant for carrying out the method
US5330642A · kind A · utility
4Cited by
16References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1992 |
| Grant date | Jul 19, 1994 |
| Priority date | — |
| Expiry date | Mar 11, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/085
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Apparatus for filtering cellulose acetate solutions, including a backflush filter to effect filtration so as to avoid solvent losses and filtering aids that must be dumped, dilution means including solvent supply means for diluting the backflush liquid, separation means for eliminating solid insoluble components, and means for recycling backflush liquid freed from solids to a plant for producing new cellulose acetate spin solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.