Reactor for bleaching high consistency pulp with ozone
US5472572A · kind A · utility
1Cited by
51References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1992 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | Jan 15, 2012 |
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 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.