Process for filtering a cellulose acetate solution
US4132642A · kind A · utility
3Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1977 |
| Grant date | Jan 2, 1979 |
| Priority date | — |
| Expiry date | Sep 6, 1997 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01D1/106
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for filtering a cellulose acetate solution comprises the steps of providing a solution of cellulose acetate which is dissolved in an organic solvent; adding to the solution a quantity of loose particulate matter and loose fibers so as to form a mixture; and filtering the solution through pores of a filter medium so as to produce a filtrate of the solution, whereby due to addition of the loose particulate matter and the loose fibers clogging of the pores is reduced relative to the amount of filtrate passing through the pores and the effective filtering time of the filtering medium is thereby increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.