| Patents for D21C 7 - Digesters (1,988) |
|---|
| 09/27/2000 | CN2398311Y Rotary spherical digester |
| 09/26/2000 | US6123808 Distribution of dilution liquor to the discharge of a cellulose pulp digester |
| 09/26/2000 | US6123807 Method for the continuous cooking of pulp |
| 09/26/2000 | US6123121 Distributing device for paper pulp |
| 09/20/2000 | EP1036236A1 Pulp production method and apparatus |
| 09/19/2000 | US6120647 Simplified liquid removal system for a cellulose pulp digester |
| 09/19/2000 | US6120646 High pressure feeder lacking a screen and having rotating pockets which can be filled efficiently to maximum capacity for feeding comminuted cellulose and liquid to continuosly operating digester |
| 09/18/2000 | CA2300832A1 Chip feeding to a comminuted cellulosic fibrous material treatment vessel |
| 09/05/2000 | US6113742 Digester having screening arrangement for isothermal cooking of fibrous material |
| 09/05/2000 | CA2128241C Pulp bleaching apparatus and method |
| 08/30/2000 | EP0811088B1 A screen having inclined slots for use in a continuous digester |
| 08/29/2000 | US6109312 Air evacuation insert for wood chip digester |
| 08/24/2000 | WO2000049222A1 Method and apparatus for treating pulp |
| 08/22/2000 | US6106668 Steaming, slurrying, pressurization |
| 08/15/2000 | US6103058 Controlling temperature and alkalinity |
| 08/08/2000 | US6098658 Method and apparatus for filling a pulp tower |
| 08/04/2000 | CA2297222A1 Minimization of malodorous gas release for a cellulose pulp mill feed system |
| 07/18/2000 | CA2144422C Continuous elemental analysis of process flows |
| 07/12/2000 | EP0824616B1 A process for rapid acid hydrolysis of lignocellulosic material and hydrolysis reactor |
| 07/11/2000 | US6086717 Separator having a screen basket disposed in a digester |
| 07/11/2000 | US6086712 DOM control in cellulose pulp production |
| 06/20/2000 | US6076956 Device for distributing suspensions in a container |
| 06/06/2000 | US6071331 Method and apparatus for separating gas from a gaseous material |
| 05/30/2000 | US6069688 Method for producing continuous in-like kappa measurements for papermaking pulps |
| 05/18/2000 | WO2000011259A3 Device for making cellulose |
| 05/18/2000 | CA2289325A1 Heat economy enhancements for the recovery and use of energy obtained from spent cooking liquors |
| 05/16/2000 | US6063238 Black liquor impregnation in digester |
| 05/06/2000 | CA2288562A1 Chip spreader for air-lock feeder |
| 04/26/2000 | CA2282094A1 Pulp cooking with particular alkali profiles |
| 04/18/2000 | CA2138048C Determination and control of effective alkali in kraft liquors by ir spectroscopy |
| 04/15/2000 | CA2286266A1 Compression rings for column relief in continuous cooking vessels |
| 04/02/2000 | CA2282065A1 Method and apparatus for continuously pulping cellulosic fibrous material |
| 03/29/2000 | EP0988414A1 Method for continuous cooking in a single-vessel digester |
| 03/21/2000 | US6039841 Screen having inclined slots for use in a continuous digester |
| 03/08/2000 | CN1050164C Manufacture technology of sea-weed fibre |
| 03/07/2000 | US6032885 Control system for a repulping apparatus |
| 03/02/2000 | WO2000011259A2 Device for making cellulose |
| 02/15/2000 | US6024837 Low temperature gas phase continuous digester |
| 02/15/2000 | US6024227 Tramp material removal from pulp feed systems |
| 02/09/2000 | EP0854953B1 Process for determining the final point of pulp cooking and an arrangement for controlling the pulp cooking time in a reactor |
| 01/26/2000 | CN1048778C Chip packer, and system for producing chemical pulp using crushed chip and utilizing such chip packer |
| 01/25/2000 | US6017420 Apparatus for automated monitoring of pulp retention time using an iodine salt tracer |
| 01/18/2000 | CA2122533C Digester temperature distribution control system |
| 01/05/2000 | EP0627029B1 Pulp bleaching apparatus and method |
| 12/22/1999 | CN1047640C Method of producing sulphate pulp through steamed and pulverized cellulose fiber |
| 12/15/1999 | EP0963480A1 Method and device for the continuous cooking of chemical pulp |
| 12/08/1999 | EP0731857B1 Reducing gaseous emissions from a chip bin |
| 11/29/1999 | CA2273379A1 Frusto-conical outlet for a cellulose material treatment vessel |
| 11/17/1999 | CN2349242Y Bidirection flow gap screw pulp squeezer |
| 11/16/1999 | US5985096 Reduces cost of manufacture of digester shell by making external step increases unnecessary; minimizes channeling, enhances uniform treatment of cellulosic material |
| 11/11/1999 | WO1999045191A9 Treatment of cellulose material with additives while producing cellulose pulp |
| 11/03/1999 | EP0776394B1 Enhancements in pulping with dissolved solids control |
| 10/19/1999 | US5968314 Comminution of cellulose fibers, slurrying and digestion of fibers, purging with air |
| 10/07/1999 | DE19814385C1 Verfahren und Vorrichtung zur Prozeßführung und zur Prozeßoptimierung der Chemikalienrückgewinnung bei der Herstellung von Zellstoff Method and apparatus for process management and for process optimization of the recovery of chemicals in the production of pulp |
| 10/06/1999 | EP0947625A1 Process and apparatus for controlling and optimizing the process of chemical recovery during cellulose production |
| 10/06/1999 | EP0946820A1 Method and device for conducting a process in the production of paper |
| 10/06/1999 | EP0946816A1 Method and device for conducting a process in the production of cellulose |
| 10/06/1999 | CA2268338A1 Feeding of comminuted fibrous material to a pulping process |
| 10/05/1999 | CA2022760C Process for the comminution of materials |
| 09/23/1999 | WO1999047250A1 Device, method and pressurized reactor for the treatment of solids with liquefied gases under pressure |
| 09/16/1999 | DE19910562A1 Treating solid materials with a liquid gas |
| 09/10/1999 | WO1999045191A1 Treatment of cellulose material with additives while producing cellulose pulp |
| 09/10/1999 | CA2320131A1 Treatment of cellulose material with additives while producing cellulose pulp |
| 08/26/1999 | WO1999042653A1 Feeding system in connection with the continuous cooking of cellulose containing material |
| 08/25/1999 | EP0937813A2 Enhancement in pulping with dissolved solids control |
| 08/25/1999 | EP0738342B1 Method for controlling a process by measurement of wood chips |
| 08/10/1999 | CA2007986C Apparatus and process for the delignification of cellulose pulp |
| 07/28/1999 | CN2330688Y Oil-inducing rotary spherical digester |
| 07/26/1999 | CA2255517A1 Simplified liquid removal system for a cellulose pulp digester |
| 07/21/1999 | CN1223317A Pollution-free ecological equilibrium paper-making process |
| 07/20/1999 | US5925216 Method of continuous pulping in a digester with high black liquor usage in the impregnation stage |
| 07/14/1999 | CN2328687Y Reclaiming equipment for waste heat of paper-making digestion |
| 07/07/1999 | CN1222208A Method and appts.for filling pulp tower |
| 07/06/1999 | US5919337 Method of continuously isothermally cooking of pulp |
| 06/09/1999 | CA2251483A1 Improved distribution of dilution liquor to the discharge of a cellulose pulp digester |
| 05/26/1999 | CN2320649Y Vertical digester for paper-making pulping |
| 05/12/1999 | CN1216591A System for feeding a suspension to a pressurized vessel |
| 05/12/1999 | CN1043370C Two-purpose machine for steaming and washing paper pulp |
| 05/06/1999 | EP0912796A1 Method and apparatus for filling a pulp tower |
| 04/30/1999 | CA2252148A1 Control system for repulping apparatus |
| 04/21/1999 | CN1214747A Process for continuously guiding liquids |
| 04/14/1999 | EP0907787A1 Distributing device for paper pulp |
| 03/25/1999 | WO1999014424A1 Pulp production method and apparatus |
| 03/25/1999 | CA2304027A1 Pulp production method and apparatus |
| 03/16/1999 | US5882477 Continuous digester with a low temperature gas-phase |
| 03/09/1999 | US5879463 Simultaneous delignification and saccharification |
| 02/04/1999 | CA2243374A1 Tramp material removal from pulp feed systems |
| 02/03/1999 | EP0894161A1 System for feeding a suspension to a pressurized vessel |
| 02/03/1999 | CN1206762A Dissolved solids control in pulp production |
| 02/02/1999 | US5865948 Oxygen-free solvent pulping |
| 01/26/1999 | CA2097473C Reactor system for treating cellulosic pulp |
| 01/20/1999 | EP0891438A1 Process for continuously guiding liquids when digesting pulp in a digester |
| 01/12/1999 | USRE36033 Treatment of fibers |
| 12/22/1998 | US5851350 Method and apparatus for pumping cellulose pulp |
| 12/17/1998 | WO1998056980A1 Improved displacement batch digester cooking system |
| 12/17/1998 | WO1998056979A1 Method for continuous cooking in a single-vessel digester |
| 12/15/1998 | US5849151 Continuous digester having means for implementing low dissolved solids profiling |
| 12/15/1998 | US5849150 Low dissolved solids control in pulp production |
| 10/27/1998 | US5827401 Screen system for a continuous digester |
| 10/20/1998 | US5824188 Method of controlling the pressure of a continuous digester using an extraction-dilution |