| Patents for D21C 7 - Digesters (1,988) |
|---|
| 05/23/2002 | US20020060024 Feeding comminuted fibrous material |
| 05/23/2002 | US20020059997 Compression rings for column relief in continuous cooking vessels |
| 05/23/2002 | US20020059992 Water purification |
| 05/23/2002 | US20020059991 Volume of liquid that is transferred to the High-pressure Feeder is reduced so that more wood chips can be introduced and processed in the digester system being fed per revolution |
| 05/15/2002 | EP1205597A1 Process for continuous cooking of pulp |
| 05/08/2002 | EP1203841A1 Process for continuous cooking of pulp |
| 05/03/2002 | CA2357393A1 Process for continuous cooking of pulp |
| 04/23/2002 | US6375796 Method of treating material in a continuous digester |
| 04/23/2002 | US6375795 Minimization of malodorous gas release from a cellulose pulp mill feed system |
| 04/23/2002 | CA2230266C Determination of sodium sulfide and sulfidity in green liquors and smelt solutions |
| 04/10/2002 | EP0834051B1 Method and apparatus for treating material which conducts heat poorly |
| 04/09/2002 | US6368453 Chip feeding to a comminuted cellulosic fibrous material treatment vessel |
| 04/02/2002 | US6365732 Process for obtaining stereoisomers from biomass |
| 03/26/2002 | US6361649 Method for the continuous cooking of chemical pulp |
| 03/13/2002 | EP0946820B1 Method and device for conducting a process in the production of paper |
| 03/07/2002 | US20020026991 Impregnating the material with a solution containing yield or strength-enhancing additive so that no degradation or hydrolysis occurs; treating material with an alkaline cooking liquor produce a chemical cellulose pulp |
| 02/12/2002 | US6346167 Kraft cooking communited cellulose fibers at high rate by controlling effective dissolved lignin concentration of the cooking liquor; kraft pulp of increased strength, bleachability that uses less effective alkali |
| 02/07/2002 | WO2001088257A8 Methods for analyzing boron-containing alkaline pulping liquors |
| 02/05/2002 | US6344112 Screen having inclined slots for a digester |
| 01/30/2002 | CN1333403A Dogstail pulp large liquor ratio circular heating replacing digestion technology and digestion equipment thereof |
| 01/29/2002 | CA2202250C Black liquor impregnation in single-vessel hydraulic digester |
| 01/17/2002 | WO2002004084A2 Process for obtaining bio-functional fractions from biomass |
| 01/16/2002 | EP0792394B1 Black liquor impregnation in single-vessel hydraulic digester |
| 01/16/2002 | CN2471814Y Quick acting ball loader |
| 01/08/2002 | US6336993 Metal removal from comminuted fibrous material during feeding |
| 01/02/2002 | EP1165879A1 Method and apparatus for treating pulp |
| 12/25/2001 | US6332954 Continuous digester system having a top separator |
| 12/25/2001 | US6332542 Tramp material removal from pulp feed system |
| 12/13/2001 | WO2001094691A1 Method for batch cooking |
| 12/12/2001 | EP0912796B1 Method and apparatus for filling a pulp tower |
| 12/06/2001 | US20010047854 Frusto-conical outlet for a cellulose material treatment vessel |
| 12/06/2001 | US20010047853 Materials handling, storage |
| 12/04/2001 | US6325890 Steaming cellulosic material to heat and to remove air, slurrying with cooking liquor, pressurizing with two or more high pressure slurry pumps at location at least thirty feet below top of treatment vessel, transferring to top of vessel |
| 12/04/2001 | US6325889 Producing pulp (cellulose sulfate) with continuous digester system, controlling temperature and alkaline levels |
| 11/22/2001 | WO2001088257A1 Methods for analyzing boron-containing alkaline pulping liquors |
| 11/20/2001 | CA2174873C Chip pumping to a continuous digester |
| 11/18/2001 | CA2344845A1 Feeding cellulose material to a treatment vessel |
| 11/14/2001 | CN2459337Y Pulp squeezer in digester ball |
| 11/14/2001 | CA2316169A1 Methods for analyzing boron-containing alkaline pulping liquors |
| 11/13/2001 | US6315128 Tramp material removal from pulp feed systems |
| 11/13/2001 | CA2266822C Screen plate in a cellulose pulping vessel |
| 11/11/2001 | CA2345762A1 Feeding comminuted fibrous material |
| 11/11/2001 | CA2345759A1 Metal removal from comminuted fibrous material during feeding |
| 11/08/2001 | US20010037865 Producing pulp (cellulose sulfate) with continuous digester system, controlling temperature and alkaline levels |
| 10/25/2001 | US20010032711 Pulp cooking with particular alkali profiles |
| 10/23/2001 | US6306252 Passing hot black liquor including sulphur compounds from digester through heat exchanger; passing evaporable liquid to be evaporated through heat exchanger into heat exchange contact with hot black liquor to produce steam |
| 10/11/2001 | US20010027849 A pressure vessel having a lengthwise axis, a rear upstream inlet end having a wood chip intake means, and a front outlet having a pulp outlet means |
| 10/04/2001 | US20010025694 Simplification of system combining functions of controlling liquid level in slurrying conduit and storing and supplying liquid to pump connected to digester |
| 09/27/2001 | US20010023748 Feeding liquid slurry into top of vessel; withdrawal from bottom creating downward flow; horizontal flow of treating liquid |
| 09/20/2001 | US20010022283 Tramp material removal from pulp feed system |
| 09/04/2001 | US6284095 Minimization of malodorous gas release from a cellulose pulp mill feed system |
| 08/28/2001 | US6280575 Frusto-conical outlet for a cellulose material treatment vessel |
| 08/28/2001 | US6280569 Compression rings for column relief in continuous cooking vessels |
| 08/28/2001 | US6280568 For producing kraft pulp of increased strength and bleachability |
| 08/22/2001 | EP1126075A2 Dissolved solids control in pulp production |
| 08/22/2001 | EP0669998B2 Digester for continuous cooking of fibre material |
| 08/22/2001 | CN2443984Y Mixing device for steaming ball of making paper pulp |
| 08/21/2001 | US6277240 Method for continuously pulping cellulosic fibrous material |
| 07/26/2001 | WO2001053810A1 Method and measurement device for measuring suspension |
| 07/24/2001 | CA2181892C Chip bin assembly including a hollow transition with one dimensional convergence and side relief |
| 07/24/2001 | CA2181786C Improved chip feed system and method for a digester |
| 07/19/2001 | US20010008177 Minimization of malodorous gas release from a cellulose pulp mill feed system |
| 07/17/2001 | US6261413 Continuously guiding liquids in a digester during pulp digestion |
| 07/12/2001 | WO2001049927A1 Method for controlling the cooking temperature in a continuous vapour phase digester |
| 07/04/2001 | EP0891438B1 Process for continuously guiding liquids when digesting pulp in a digester |
| 07/03/2001 | US6254729 Pulper with extraction plate assembly having removable inserts and method of manufacturing same |
| 07/03/2001 | US6254723 Method for continuous cooking in a single-vessel digester |
| 06/27/2001 | CN2436539Y Impeller of ball feeder of ball digester |
| 06/13/2001 | EP0815315B1 Method and device for process control in cellulose and paper manufacture |
| 06/05/2001 | US6241851 Treatment of cellulose material with additives while producing cellulose pulp |
| 05/31/2001 | US20010001977 Kraft cooking communited cellulose fibers at high rate by controlling effective dissolved lignin concentration of the cooking liquor; kraft pulp of increased strength, bleachability that uses less effective alkali |
| 05/29/2001 | CA2113450C Method and apparatus for separating gas from a gaseous material |
| 05/03/2001 | WO2001031117A1 Bar screen |
| 05/03/2001 | US20010000588 Improved separator system for producing pulp with the aid of continuous digester systems |
| 04/10/2001 | US6214171 Top separator in a continuous digester system |
| 04/04/2001 | EP0850415B1 Determination of sodium sulfide and sulfidity in green liquors and smelt solutions |
| 04/04/2001 | CN2425944Y High-pressure digesting hot spraying tank for ultra-short cycle hot-spraying wood-grinding pulping paper-making using poplar and dahurian larch |
| 04/04/2001 | CN1064096C System for controlling temperature in steaming and boiling pot |
| 04/03/2001 | US6210532 Means for conveying pulp having differential pressure control |
| 03/21/2001 | EP0782642B1 Method and apparatus for the continuous production of cellulosic pulp |
| 03/20/2001 | US6203662 Transporting fiber material and transport liquid to impregnation zone; heating; separating, withdrawing transport liquid; supplying cooking liquor; cooking; withdrawing hot black liquor; transferring; separating; recovering |
| 03/13/2001 | US6199299 Feeding of comminuted fibrous material to a pulping process |
| 03/13/2001 | CA2189296C Method and apparatus for improving a batch cooking process |
| 02/05/2001 | WO2001059437A1 Determination of the properties of a solution or solid using raman ratios |
| 01/23/2001 | US6176971 Passing hot spent chemical cellulose pulping treatment liquor to a reboiler, then pressurization of the resulting steam for subsequently steaming chips to be pulped |
| 01/16/2001 | US6174411 Has an inverted top separator and is hydraulically filled to above the level of the inverted top separator, and may be substantially completely hydraulically full. |
| 01/10/2001 | EP1066109A1 Device, method and pressurized reactor for the treatment of solids with liquefied gases under pressure |
| 01/09/2001 | US6171494 Hydraulic vessel system having a downwardly feeding separator |
| 12/26/2000 | US6165323 Screen plate having a plurality of inclined slots in a digester |
| 12/12/2000 | US6159337 Dissolved organic materials control in cellulose pulp production |
| 12/12/2000 | US6159336 Method and device for the continuous cooking of pulp |
| 12/07/2000 | WO2000073575A1 Method for avoiding mechanical damage of pulp |
| 12/07/2000 | WO2000073572A1 Process for digesting lignocellulose material |
| 12/06/2000 | EP1056903A1 Feeding system in connection with the continuous cooking of cellulose containing material |
| 11/07/2000 | US6143134 Chip spreader for air-lock feeder |
| 10/31/2000 | US6139689 Apparatus for digesting pulp in a displacement batch digester that uses displacement liquor having a sufficient hydrostatic head |
| 10/24/2000 | US6136145 Method for treating pulp in an indirect heat exchanger in connection with bleaching |
| 10/17/2000 | US6132556 Varying the flow rate of liquor extracted from the pressure-control extraction to maintain the pressure in the digester at a desired superatmospheric level while maintaining a uniform and stable material movement in the counter-current |
| 10/17/2000 | CA2213475C A screen having inclined slots for use in a continuous digester |
| 10/10/2000 | US6129816 Tapered screen assembly for a cellulose pulp digester |