Nitrocellulose purification
US4401809A · kind A · utility
5Cited by
9References
5Claims
0Family size
Inventor
Key dates
| Filing date | Apr 5, 1982 |
| Grant date | Aug 30, 1983 |
| Priority date | — |
| Expiry date | Apr 5, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00177
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There is disclosed a multi-vessel autoclave which is suitable for use in a continuous process for purifying nitrocellulose made by the nitric acid-sulfuric acid nitration of cellulose. The autoclave comprises a plurality of adjacent cylindrical vessels wherein each common wall between the adjacent vessels has an opening for the passage of the nitrocellulose which is in a slurry. The openings are situated so the slurry flows in a serpentine path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.