| Patent Number |
Title Of Patent |
Date Issued |
| 7351306 |
Cooking of cellulose pulp in a cooking liquor containing pre-evaporated black liquor |
April 1, 2008 |
| The method is for cooking of cellulose pulp in which the raw material, preferably in the form of chips, undergoes a successive elevation of temperature towards the cooking temperature while the chips are first impregnated with an impregnation liquor followed by cooking in a cooking l |
| 7285179 |
Continuous digester for cellulose pulp including method and recirculation system for such digest |
October 23, 2007 |
| The continuous digester is for producing chemical pulp to a process for operating this digester and to a feedback system for the cooking liquid. By means of implementing cooking zones 1st, 2nd, 3rd, 4th and 5th down through the digester, that have a successively decreasing liquid-to-wood |
| 7270725 |
Pretreatment of chips with white liquor prior to a treatment with black liquor |
September 18, 2007 |
| The method is for the manufacture of cooked cellulose pulp in which the starting material, preferably chips, undergoes a successive increase in temperature towards cooking temperature. This is done while the chips are first treated in a pre-treatment zone in which the main part, greater |
| 7217338 |
Process for continuously cooking chemical cellulose pulp |
May 15, 2007 |
| The process is for continuously cooking chemical pulp in a digester system consisting of at least one vessel for impregnating and cooking comprising an inlet into which a mixture of chips and process liquid is fed. The chips are impregnated at a predetermined impregnation temperature, |
| 6203662 |
Method for the continuous cooking of pulp in a digester system having a top separator |
March 20, 2001 |
| This invention relates to a new and improved way of continuously cooking fiber material, wherein temperatures and alkaline levels are controlled to be maintained within specific levels in different zones of the digesting process in order to optimize chemical consumption and heat-economy, |
| 6159336 |
Method and device for the continuous cooking of pulp |
December 12, 2000 |
| This invention relates to a new and improved way of continuously cooking fiber material, wherein temperatures and alkaline levels are controlled to be maintained within specific levels in different zones of the digesting process in order to optimize chemical consumption and heat-economy, |
| 6123807 |
Method for the continuous cooking of pulp |
September 26, 2000 |
| This invention relates to a new and improved way of continuously cooking fiber material, wherein temperatures and alkaline levels are controlled to be maintained within specific levels in different zones of the digesting process in order to optimize chemical consumption and heat-economy |
| 5885414 |
Method of producing pulp with high alkali cooking in the last cooking stage |
March 23, 1999 |
| A method and device for cooking pulp by increasing the effective alkali concentration in the residual phase of the cooking process to substantially improve the residual delignification rate and thus improving the pulp properties such as the pulp strength and pulp yield at a given lig |
