Use of ultrasonic energy to improve nitrocellulose purification
US4388458A · kind A · utility
1Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 24, 1981 |
| Grant date | Jun 14, 1983 |
| Priority date | — |
| Expiry date | Dec 24, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B5/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The instant invention relates to a process for removing trace sulfuric acid rom nitrocellulose fibers by dispersing the fibers in water and then subjecting them to ultrasonic energy for a time period and at an energy level sufficient to enhance the nitrocellulose fibers contact with water and facilitate sulfuric acid dispersal in the water. The waste water containing the traces of sulfuric acid contaminant from the nitrocellulose fibers is removed and the purified nitrocellulose fibers recovered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.