Apparatus for bleaching high consistency pulp with ozone
US5520783A · kind A · utility
7Cited by
55References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1993 |
| Grant date | May 28, 1996 |
| Priority date | — |
| Expiry date | Jan 25, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F27/1145
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus and method for bleaching high consistency lignocellulosic pulp using ozone supplied in an ozone containing gas. The bleaching reactor apparatus according to the invention is a generally cylindrical vessel itself being rotatable or with a rotatable shaft having radially extending paddles arranged in a configuration to minimize axial dispersion of the pulp and maximize radial dispersion of the pulp to provide a radially dispersed plug flow of pulp through the reactor in the presence of the ozone to provide substantially uniformly bleached pulp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.