Procedure for determining and controlling the composition proportions of wood chip mixes in alkaline pulp digestion processes
US5032223A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1989 |
| Grant date | Jul 16, 1991 |
| Priority date | — |
| Expiry date | Oct 4, 2009 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C7/12
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A procedure for determining the composition of a wood chip mix dispensed in alkaline delignifying processes, particularly in sulphate and soda/anthraquinone cooking, with the aid of the monomeric compounds produced in connection with the cooking and dissolved in the waste liquor. As taught by the procedure, a cooking liquor sample is taken in the cooking process, this sample being chromatographically analyzed. On the basis of the content proportions of certain compounds analyzed by substance groups, the composition of the dispensed wood chip mix is determined, and at the same time information is gained for optimating the conditions applied in the cooking process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.