| Patents for D21C 7 - Digesters (1,988) |
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| 02/13/1997 | WO1997005326A2 A feeding device for high pressure digestors |
| 02/13/1997 | CA2228307A1 A feeding device for high pressure digestors |
| 01/28/1997 | US5597446 Feeding wood chips to a pulping digester, electric motor moves rotor shaft in response to signal from controller |
| 01/16/1997 | WO1997001666A1 Continuous digester |
| 01/09/1997 | WO1997001074A1 Method and apparatus for treating material which conducts heat poorly |
| 01/09/1997 | WO1997000998A1 Method and apparatus for treating pulp in an indirect heat exchanger in connection with bleaching |
| 01/09/1997 | WO1997000997A1 Method and apparatus for treating pulp in an indirect heat exchanger after pulping |
| 01/08/1997 | CN1139968A Chip bin assembly including a hollow transition with one dimension covergence and side relief |
| 01/08/1997 | CN1139716A Cylinder external burning type digesting drier for paper making |
| 01/07/1997 | US5591303 Process for operating a digester |
| 12/31/1996 | US5589036 Controlling pulp flow in an upflow pulp treatment tower |
| 12/24/1996 | CA2067572C Method and apparatus to displace spent liquors in a digester |
| 12/18/1996 | CN2242908Y Steam-inletting stirring-type steaming ball for pulp-layer |
| 12/11/1996 | EP0746650A1 Pulping of fibrous plant materials and recovery of resultant by-products |
| 11/20/1996 | EP0742854A1 Chip bin assembly including a hollow transition with one dimensional convergence and side relief |
| 11/19/1996 | US5575890 Method for selectively increasing the sulfide ion concentration and sulfidity of kraft cooking liquor during kraft cooking of wood |
| 10/31/1996 | WO1996034144A1 Feeding and discharge of comminuted fibrous material |
| 10/23/1996 | EP0738342A1 Method for controlling a process by measurement of wood chips |
| 10/22/1996 | US5567280 Digester for cooking pulp having staggered circular screens for isothermal cooking |
| 10/22/1996 | US5567279 Variable stage pressure diffuser |
| 10/22/1996 | US5567262 Two stage pressure diffuser |
| 10/17/1996 | WO1996032531A1 Heat recovery from spent digester cooking liquor |
| 10/17/1996 | WO1996029465A3 Method and device for process control in cellulose and paper manufacture |
| 10/15/1996 | US5565061 Method and apparatus for removing scales deposited on the strainer of a pulp digester |
| 10/02/1996 | EP0734469A1 Implementation of dissolved solids profiling |
| 10/02/1996 | EP0649531B1 Determination and control of effective alkali in kraft liquors by ir spectroscopy |
| 09/26/1996 | WO1996029465A2 Method and device for process control in cellulose and paper manufacture |
| 09/26/1996 | DE19510008A1 Verfahren und Vorrichtung zur Prozeßführung bei der Zellstoff- und/oder Papierherstellung Method and apparatus for process control in pulp and / or paper-making |
| 09/26/1996 | CA2215956A1 Method and device for process management in the production of pulp and/or paper |
| 09/25/1996 | CN1131713A Production of high-strength corrugated base paper with straw pulp by neutral ammonium sulfite process |
| 09/18/1996 | EP0731857A1 Reducing gaseous emissions from a chip bin |
| 09/18/1996 | CA2171595A1 Use of acid-stage filtrate in cooking liquor preparation |
| 08/29/1996 | WO1996026315A1 A screen having inclined slots for use in a continuous digester |
| 08/27/1996 | CA2080677C Continuous treatment of small chips |
| 08/20/1996 | US5547546 Chip bin with steaming control and a gas vent containing a vacuum and pressure relief device |
| 08/20/1996 | US5547545 Digester temperature distribution control system |
| 08/20/1996 | US5547012 Dissolved solids control in pulp production |
| 07/31/1996 | CN2232050Y Digesting and washing dual-purpose machine for pulp |
| 07/23/1996 | US5538597 Apparatus for the discharge of a mass tower |
| 07/17/1996 | CN1032322C Method for making artificial fibre pulp and xylitol using corn stalk |
| 07/16/1996 | US5536367 Pulp digester cleaning system |
| 07/16/1996 | US5536366 Digester system for implementing low dissolved solids profiling |
| 06/13/1996 | WO1996017995A1 Improved chip feed system and method for a digester |
| 06/06/1996 | WO1996017124A1 Method and apparatus for controlling and directing the flow of chips into a chip bin |
| 06/05/1996 | DE4443073A1 Feed system with a lignocellulose content |
| 05/23/1996 | WO1996015316A1 Reactor for treating a pulp with a gas comprising a degassing outlet member |
| 05/23/1996 | WO1996015313A1 Black liquor impregnation in single-vessel hydraulic digester |
| 05/15/1996 | EP0611436B1 Heating arrangement |
| 05/01/1996 | EP0587826B1 Method of feeding bulk materials |
| 04/17/1996 | EP0570385B1 Method for supplying pressurized continuous digesters to obtain cellulose pulp |
| 04/11/1996 | WO1996010674A1 Reducing gaseous emissions from a chip bin |
| 04/10/1996 | EP0705359A1 Continuous elemental analysis of process flows |
| 04/10/1996 | CN1120097A Double spherical cooking digester black liquor extracted from sphere |
| 04/02/1996 | US5503711 Method of rehabilitating a wood pulp digester |
| 03/28/1996 | WO1996009432A1 Method and apparatus for the continuous production of cellulosic pulp |
| 03/28/1996 | CA2208264A1 Method and apparatus for the continuous production of cellulosic pulp |
| 03/19/1996 | US5500084 Method and apparatus for pulping cellulosic material using a vessel with an impergnation zone and an attrition zone |
| 03/19/1996 | US5500083 Method of feeding cellulosic material to a digester using a chip bin with one dimensional convergence and side relief |
| 03/14/1996 | WO1996007787A1 Cooking with spent liquor pretreatment of cellulose material |
| 03/14/1996 | WO1996007786A1 Continuous kraft cooking with black liquor pretreatment |
| 03/05/1996 | CA2037717C Extended kraft cooking with white liquor added to wash circulation |
| 02/29/1996 | WO1996006217A1 Enhancements in pulping with dissolved solids control |
| 02/28/1996 | EP0698139A1 Dissolved solids control in pulp production |
| 02/28/1996 | CN1117746A Straining device |
| 02/22/1996 | WO1996005365A1 Means for gas-sealingly conveying shredded pulp |
| 02/22/1996 | CA2197190A1 Means for gas-sealingly conveying shredded pulp |
| 02/20/1996 | CA2054490C Particle level sensor |
| 02/06/1996 | US5489363 Pulping with low dissolved solids for improved pulp strength |
| 01/31/1996 | EP0694097A1 Reciprocal movable screens in a vertically elongated vessel |
| 01/24/1996 | EP0693143A1 Cooking system for hardwood |
| 01/23/1996 | US5486915 On-line measurement of lignin in wood pulp by color shift of fluorescence |
| 01/02/1996 | US5479792 Heating arrangement |
| 12/26/1995 | US5478439 Method for feeding cellulose pulp mixture to a pressurized continuous digester |
| 12/21/1995 | WO1995034712A1 Improved chip feeding for a continuous digester |
| 12/21/1995 | DE4420976A1 High pressure lumpy fibre pulp is cheaply, evenly and reliably extruded |
| 12/19/1995 | US5476572 Chip feeding for a continuous digester |
| 12/13/1995 | EP0686578A1 High consistency pulp tower |
| 12/07/1995 | DE4419733A1 Feeding solid lignocellulose materials into high pressure reactor |
| 12/06/1995 | EP0685015A1 Straining device. |
| 12/06/1995 | EP0627029A4 Pulp bleaching apparatus and method. |
| 12/06/1995 | CN1030474C Method for paper making using no alkali |
| 12/05/1995 | US5472572 Reactor for bleaching high consistency pulp with ozone |
| 11/28/1995 | US5470437 Digester for cooking pulp having staggered screens |
| 10/31/1995 | US5462585 Method and apparatus for separating gas from a gaseous material |
| 10/25/1995 | CN1110733A System for controlling temperature in steaming and boiling pot |
| 10/12/1995 | WO1995027099A1 Nonwooden fiber digesting method and digesting apparatus for the same |
| 10/11/1995 | CN2209691Y Digesting ball with stainless steel lining |
| 09/27/1995 | EP0673453A1 Process for continuous cooking of pulp |
| 09/27/1995 | EP0673452A1 Digester for continuous cooking of fibre material. |
| 09/27/1995 | CN2208589Y Digester for vegetable cellulose |
| 09/26/1995 | CA2066181C Displacement heating in continuous digesters |
| 09/20/1995 | CN1108713A Two-purpose machine for steaming and washing paper pulp |
| 09/13/1995 | EP0670925A1 Top circulation line cooling for a modified cook digester. |
| 09/13/1995 | EP0670924A1 Method of continuously cooking pulp. |
| 09/06/1995 | EP0669998A1 Digester for continuous cooking of fibre material. |
| 09/05/1995 | USH1479 Liquid composition analyzer and method |
| 08/31/1995 | WO1995023257A1 Recycling of knots in a continuous process for cooking chemical pulp |
| 08/30/1995 | CN1107529A Pulping method for paper-making |
| 08/24/1995 | WO1995022708A1 Valve arrangement and a method for use in a removal system comprising screens, preferably digester screens |
| 08/24/1995 | CA2182893A1 Valve arrangement and a method for use in a removal system comprising screens, preferably digester screens |