Process for classifying particulate hydrophilic polymer and sieving device
US6164455A · kind A · utility
23Cited by
10References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 20, 1998 |
| Grant date | Dec 26, 2000 |
| Priority date | — |
| Expiry date | Jan 20, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB07B1/56
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides a process for classifying a particulate hydrophilic polymer and a sieving device, which can carry out a classification in a small separation particle diameter with high efficiency and exhibit classification ability inherent in the sieving device. The process comprises the step of classifying a particulate hydrophilic polymer in dry particle size with a sieving device, wherein the sieving device is used in a heated and/or thermally insulated state. The sieving device comprises a thermally insulating means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.