| Patents for D21C 7 - Digesters (1,988) |
|---|
| 08/22/1995 | US5443162 High capacity high pressure feeding |
| 08/10/1995 | WO1995021287A1 Chip bin assembly including a hollow transition with one dimensional convergence and side relief |
| 08/09/1995 | EP0665911A1 Completely countercurrent cook continuous digester |
| 07/06/1995 | WO1995018261A1 Method and device for the continuous cooking of pulp |
| 06/22/1995 | WO1995016817A1 Screen device |
| 06/14/1995 | CN1103685A High-concentration de-inking method for waste paper |
| 05/31/1995 | CN1103124A Bamboo material fibre fluff pulp and making method |
| 05/18/1995 | WO1995013419A1 Implementation of dissolved solids profiling |
| 05/09/1995 | US5413677 Method for producing chemical pulp from hardwood chips |
| 04/26/1995 | EP0649531A1 Determination and control of effective alkali in kraft liquors by ir spectroscopy. |
| 03/28/1995 | US5401361 Completely coutercurrent cook continuous digester |
| 03/23/1995 | WO1995008020A1 Arrangement for spreading paper pulp in a container |
| 03/14/1995 | US5397434 Method for distributing cellulosic pulp through a reactor at a constant upward velocity |
| 03/02/1995 | DE4343730C1 Charging valve unit for cellulose digester installations and its use |
| 03/01/1995 | CN1099444A Dissolved solids control in pulp production |
| 01/03/1995 | US5378320 Control of recausticizing system operation by IR spectroscopys |
| 12/13/1994 | US5372679 Reactor system for treating cellulosic pulp at a constant upward flow velocity |
| 12/07/1994 | EP0627030A1 Modified digestion of paper pulp followed by ozone bleaching |
| 12/07/1994 | EP0627029A1 Pulp bleaching apparatus and method |
| 11/30/1994 | CN1095779A Non-alkali paper making process |
| 11/22/1994 | US5366592 Digester sampling device |
| 11/15/1994 | US5364502 Kraft pulp, measuring sulfate and thiosulfate concentration |
| 11/10/1994 | WO1994025668A1 Dissolved solids control in pulp production |
| 11/10/1994 | CA2424682A1 Dissolved solids control in pulp production |
| 10/27/1994 | WO1994024363A1 Scraper device |
| 10/27/1994 | WO1994024362A1 Method of continuously cooking pulp |
| 10/13/1994 | WO1994023120A1 Cooking system for hardwood |
| 10/13/1994 | WO1994023119A1 Reciprocal movable screens in a vertically elongated vessel |
| 10/13/1994 | CA2159999A1 Cooking system for hardwood |
| 09/29/1994 | WO1994021855A1 Process and apparatus for high capacity and high pressure feeding |
| 09/15/1994 | WO1994020671A1 Method for controlling a process by measurement of wood chips |
| 09/15/1994 | CA2156819A1 Method for controlling a process by measurement of wood chips |
| 09/07/1994 | CN1091792A Process for continuous cooking of pulp |
| 09/01/1994 | WO1994019533A1 Straining device |
| 08/24/1994 | EP0611436A1 Heating arrangement. |
| 08/10/1994 | EP0609377A1 Method and apparatus for controlling liquid level in a knot drainer |
| 08/10/1994 | CN1090616A Pulping method |
| 07/19/1994 | US5330621 Continuous elemental analysis of process flows |
| 07/13/1994 | CN1089320A Continuous elemental analysis of process flows |
| 07/12/1994 | US5328564 Eliminates use of chlorinated solvents |
| 06/01/1994 | CN2167117Y Separation and extraction equipment for pulping black liquor |
| 05/31/1994 | CA2110190A1 Control of treatment dosage to papermill broke |
| 05/26/1994 | WO1994011567A1 Method of continuously cooking pulp |
| 05/26/1994 | WO1994011566A1 Process for continuous cooking of pulp |
| 05/26/1994 | WO1994011565A1 Digester for continuous cooking of fibre material |
| 05/26/1994 | WO1994011564A1 Digester for continuous cooking of fibre material |
| 05/26/1994 | CA2149524A1 Method of continuously cooking pulp |
| 05/24/1994 | US5314583 Process for the comminution of materials and plant for carrying out the process |
| 05/11/1994 | WO1994010372A1 Top circulation line cooling for a modified cook digester |
| 05/11/1994 | CA2145529A1 Top circulation line cooling for a modified cook digester |
| 05/04/1994 | EP0594740A1 Method and apparatus for separating gas from a gaseous material |
| 04/28/1994 | WO1994009203A1 Completely countercurrent cook continuous digester |
| 04/28/1994 | CA2144078A1 Completely concurrent cook continuous digester |
| 04/26/1994 | US5306391 Measuring pulp temperature after steam addition, calculating pulp flow rate by heat balance, adjusting chemical flow rate to maintain consistency |
| 04/12/1994 | US5302247 Top circulation line cooling for a modified cook digester |
| 04/06/1994 | EP0590433A2 Control process for the production of pulp by control of pressure and temperature |
| 04/05/1994 | US5300195 Continuous vertical digester apparatus |
| 03/31/1994 | WO1994006963A1 Continuous elemental analysis of process flows |
| 03/29/1994 | CA1328034C High sulfidity cook for paper pulp using black liquor for sulfonization of steamed chips |
| 03/23/1994 | EP0587826A1 Method of feeding bulk materials. |
| 03/08/1994 | CA1327474C Extended delignification in pressure diffusers |
| 02/03/1994 | WO1994002680A1 Hydrocyclone photo-reactor |
| 02/02/1994 | CN2154869Y Ball inside automatic extracting device for steaming black liquid |
| 02/01/1994 | US5282931 Determination and control of effective alkali in kraft liquors by IR spectroscopy |
| 01/26/1994 | CN2154283Y Pulp spraying apparatus |
| 01/25/1994 | US5282131 Control system for controlling a pulp washing system using a neural network controller |
| 01/20/1994 | WO1994001769A1 Determination and control of effective alkali in kraft liquors by ir spectroscopy |
| 01/12/1994 | CN2152825Y Treater for waste gas of papermaking |
| 01/11/1994 | CA1325869C Apparatus and method for measuring vent gas flow rates and parameters in pulp and paper processing |
| 12/22/1993 | CN1079789A Manufacture technology of sea-weed fibre |
| 12/21/1993 | US5271672 Apparatus having rotating arms and fluid outlet for treating and discharging a medium |
| 12/15/1993 | EP0573892A1 Reactor system for treating cellulosic pulp |
| 12/15/1993 | EP0493422B1 Improved plug screw feeder |
| 12/14/1993 | CA2025454C Process and mechanism to empty pulping digester |
| 11/30/1993 | US5266159 Paper pulp |
| 11/10/1993 | CN1078276A Method for prodn. of printing paper pulp made from all cotton stalk by hot mechanical grinding |
| 11/03/1993 | EP0502852B1 Displacement heating in continuous digesters |
| 11/02/1993 | CA1323790C Continuous cooking pulp quality enhancements |
| 10/28/1993 | CA2067326A1 Digester ventilation and utility module |
| 10/26/1993 | US5256255 Displacement heating in continuous digesters |
| 10/20/1993 | CN1022499C Method and apparatus to displace digester from both end |
| 10/20/1993 | CN1022498C Process for mechanism to empty pulping digester |
| 09/29/1993 | CN1076743A Method for making pulp of newsprint and book paper by shattering cotton-rod, removing black bark and pith |
| 09/01/1993 | CN1075761A Application of magesium oxide as buffer solution in ammonium sulfite straw pulping process |
| 09/01/1993 | CN1021980C Displacement heating in continuous digesters |
| 08/19/1993 | WO1993016227A1 Modified digestion of paper pulp followed by ozone bleaching |
| 08/19/1993 | CA2130180A1 Modified digestion of paper pulp followed by ozone bleaching |
| 08/17/1993 | US5236554 Digester having plural screens with means for controlling liquid injection and withdrawal |
| 08/17/1993 | US5236553 Continuous cooking with reduced horsepower and pulp degradation |
| 08/17/1993 | US5236286 High pressure feeder split outflow for enhanced feeder efficiency |
| 08/17/1993 | US5236285 High pressure feeder |
| 08/05/1993 | WO1993015262A1 Method of feeding bulk materials |
| 08/05/1993 | WO1993015261A1 Pulping of fibrous plant materials and recovery of resultant by-products |
| 08/05/1993 | CA2116544A1 Pulping of fibrous plant materials and recovery of resultant by-products |
| 08/04/1993 | EP0498821B1 Method and apparatus to displace spent liquors in a digester |
| 08/03/1993 | CA1320865C Method and apparatus for evaporating waste liquor produced when cooking fibrous material containing cellulose |
| 07/22/1993 | WO1993014260A1 Pulp bleaching apparatus and method |
| 07/20/1993 | US5229294 Solution of refined lignin and organic solvent having lignin index value stabilized with respect to time |
| 06/23/1993 | CN2136852Y Mixer |
| 06/16/1993 | CN2136264Y Straw grab for straw digesting pool in paper mill |