| Patents for D21C 7 - Digesters (1,988) |
|---|
| 07/16/2003 | EP1036236B1 Pulp production method |
| 07/16/2003 | CA2414070A1 Continuous pulping processes and systems |
| 07/08/2003 | US6589391 Top separator with intraseal for digester vessel in a pulp or fiber processing system |
| 06/24/2003 | US6582554 Continuous digester having a sectioned top separator with multiple liquor extraction ports |
| 06/19/2003 | US20030111200 System and method for improving the movement and discharge of material from vessels |
| 06/12/2003 | WO2003048448A1 Method and system for the treatment of pulp prior to ozone bleaching |
| 06/10/2003 | US6576084 Method of pretreating pulp with yield or strength-enhancing additive |
| 06/10/2003 | CA2156175C Straining device |
| 06/05/2003 | US20030102093 Processes and systems for handling knots in a chemical pulping process |
| 06/05/2003 | US20030102092 Processes and systems for handling knots in a chemical pulping process |
| 06/04/2003 | EP1316638A1 Arrangement for mounting a screen |
| 06/04/2003 | CN1110602C Paper pulp tower and its filling method |
| 06/04/2003 | CA2413386A1 Processes and systems for handling knots in a chemical pulping process |
| 06/03/2003 | US6572734 Method for treatment of loose material |
| 05/27/2003 | US6569289 Cellulose slurry treating systems for adding AQ to a cellulose slurry in the substantial absence of alkali |
| 05/22/2003 | US20030095901 For removal of cooking and circulation liquid from a vessel of a reactor when chemical pulp or paper pulp is made with a continuous reactor. |
| 05/20/2003 | CA2224685C Method and apparatus for treating pulp in an indirect heat exchanger after pulping |
| 05/15/2003 | US20030089470 Digester wherein the need for separate liquor storage vessel/tank is eliminated to improve efficiency |
| 05/15/2003 | US20030089469 Chip feeding to a comminuted cellulosic fibrous material treatment vessel |
| 05/15/2003 | US20030089468 Digester wherein the need for separate liquor storage vessel/tank is eliminated to improve efficiency |
| 05/15/2003 | US20030089467 Chip feeding to a comminuted cellulosic fibrous material treatment vessel |
| 05/15/2003 | US20030089466 Chip feeding to a comminuted cellulosic fibrous material treatment vessel |
| 05/13/2003 | CA2088026C Apparatus and method of controlling a position of rotor in a high pressure feeder |
| 05/07/2003 | EP1308555A2 Dissolved solids control in pulp production |
| 05/07/2003 | EP1308554A2 Dissolved solids control in pulp production |
| 05/07/2003 | EP0862669B1 Continuous digester |
| 05/06/2003 | CA2220335C A process for rapid acid hydrolisis of lignocellulosic material and hydrolisis reactor |
| 05/01/2003 | WO2003035971A1 Container with discharging device |
| 04/23/2003 | EP1165879B1 Method and apparatus for treating pulp |
| 04/22/2003 | US6551462 System for feeding comminuted fibrous material |
| 04/16/2003 | EP1301542A2 Process for obtaining bio-functional fractions from biomass |
| 04/16/2003 | EP0698139B1 Dissolved solids control in pulp production |
| 04/08/2003 | US6544385 Channel pulper |
| 04/03/2003 | US20030062139 Rotatable packed shaft for the top separator; and a sealing ring operatively mounted to the shaft so that up lifting of said shaft provides a fluid tight seal between said pack box and a side of said ring opposite the pack box. |
| 04/02/2003 | CN1104524C Dissovlved solids control in pulp production |
| 03/26/2003 | CN2541502Y Vertical steamer for paper making pulp |
| 03/13/2003 | WO2003020481A2 Apparatus and method for pre-treatment of wood chips |
| 03/13/2003 | US20030047297 Pretreatment device for wood chips for pulping comprising a tubethrough which the wood chips fall into a digester. Steam is injected into the tube through rings of nozzles, which are angled circumferentially to impart a rotary and turbulent |
| 03/13/2003 | CA2431555A1 Apparatus and method for treatment of loose material |
| 02/26/2003 | EP1285114A1 Methods for analyzing boron-containing alkaline pulping liquors |
| 02/20/2003 | WO2003014467A2 Production of pulp from cellulosic fibrous raw materials and recovery of chemicals and energy from pulp liquors |
| 02/20/2003 | CA2455187A1 Paper plant - method and apparatus for producing pulp from cellulosic fibrous raw materials and recovering chemicals and energy from pulp liquors |
| 02/19/2003 | CN2536636Y Vaccum pressure digesters |
| 02/13/2003 | US20030030005 Method and measurement device for measuring suspension |
| 02/02/2003 | CA2396411A1 System and method for improving the movement and discharge of material from vessels |
| 01/28/2003 | CA2225023C Method and apparatus for treating pulp in an indirect heat exchanger in connection with bleaching |
| 01/23/2003 | US20030015303 In a stock preparation system that includes a housing with a fiber and water inlets, outlet(s), and with rotatable augers extending into an inner chamber; papermaking; high input consistency, and high throughput rate |
| 01/09/2003 | WO2002083578A3 Process and apparatus for the removal of scale build-up |
| 01/08/2003 | EP1272705A1 Method for controlling the cooking temperature in a continuous vapour phase digester |
| 01/02/2003 | US20030000660 Method for controlling the cooking temperature in a continuous vapour phase digester |
| 01/02/2003 | EP1270256A2 Heat transfer recording medium and printed product |
| 01/02/2003 | EP1268924A1 Method for avoiding mechanical damage of pulp |
| 12/24/2002 | US6497791 Apparatus for pre-treatment of wood chips |
| 12/12/2002 | US20020185176 Pressure vessel for a pulp mill having overflow chute |
| 12/05/2002 | US20020179263 Covering interior of vessel overcoating screen; supplying cleaning compound |
| 11/18/2002 | CA2385394A1 Pressure vessel for a pulp mill having overflow chute |
| 11/14/2002 | WO2002090648A1 Feeding arrangement for feeding of chips to chip bins |
| 11/07/2002 | WO2002088461A1 Method for supplying washing liquid to a process for cooking cellulose pulp |
| 11/06/2002 | EP1254363A1 Determination of the properties of a solution or solid using raman ratios |
| 10/30/2002 | EP1252502A1 Method and measurement device for measuring suspension |
| 10/24/2002 | WO2002083578A2 Process and apparatus for the removal of scale build-up |
| 10/24/2002 | DE10119182A1 Continually-operated cellulose digester is inclined to the horizontal with lower inlet and upper outlet |
| 10/24/2002 | CA2444853A1 Process and system for the removal of scale build-up |
| 09/26/2002 | WO2002075044A1 Continuous digester for cellulose pulp including method and recirculation system for such digester |
| 09/19/2002 | US20020129911 Process and configuration for providing external upflow/internal downflow in a continuous digester |
| 09/18/2002 | EP0742854B1 Chip bin assembly |
| 09/17/2002 | US6451172 In-line drainer enhancements |
| 09/17/2002 | US6451165 Rotation auger; fiber suspension |
| 09/17/2002 | US6451163 Materials handling, storage |
| 09/11/2002 | EP0946816B1 Method and device for conducting a process in the production of cellulose |
| 09/10/2002 | US6447645 Feeding cellulose material to a treatment vessel |
| 09/10/2002 | US6447639 Process for controlling a digester using real time measurement of moisture content and species of wood |
| 09/10/2002 | CA2218670C Method and apparatus for feeding multiple digesters |
| 09/10/2002 | CA2197312C Enhancements in pulping with dissolved solids control |
| 09/05/2002 | US20020121745 Outlet device with an intraseal for a pressurized vessel |
| 09/05/2002 | US20020121349 Process for controlling a digester using real time measurement of moisture content and species of wood |
| 09/01/2002 | CA2373383A1 Outlet device with an intraseal for a pressurized vessel |
| 08/29/2002 | US20020119258 System and method for distributing chemicals through a fibrous material using low-headspace dielectric heating |
| 08/20/2002 | US6436486 Method for distributing chemicals through a fibrous material using low-headspace dielectric heating |
| 08/20/2002 | US6436233 Transferring concentrated pulp at reduced liquid to wood ratio; low temperature minimizing flashing to steam; recycling removed liquid |
| 08/15/2002 | US20020108728 Continuous digester |
| 08/13/2002 | US6432264 Method of making a vessel assembly for handling comminuted cellulosic fibrous material |
| 08/07/2002 | CN2504306Y Grass steaming pot |
| 07/31/2002 | CN2503105Y Recoverer for waste gas residual heat of paper-making digesting |
| 07/16/2002 | CA2189899C Cooking cellulose material using high alkali concentrations and/or high ph near the end of the cook |
| 07/09/2002 | US6416621 Apparatus, process and pressure reactor for the treatment of solids with pressurized liquid gases |
| 07/09/2002 | CA2191207C Improved chip feeding for a continuous digester |
| 07/02/2002 | CA2050818C Impregnation with black liquor prior to white liquor introduction |
| 06/27/2002 | US20020079071 Process for continuous cooking of pulp |
| 06/27/2002 | US20020079070 Process for continuous cooking of pulp |
| 06/20/2002 | WO2002048451A1 Arrangement for feeding pulp to a bleaching tower |
| 06/20/2002 | WO2002004084A3 Process for obtaining bio-functional fractions from biomass |
| 06/20/2002 | US20020074101 Top separator with intraseal for digester vessel in a pulp or fiber processing system |
| 06/20/2002 | CA2432045A1 Arrangement for feeding pulp to a bleaching tower |
| 06/19/2002 | CA2364791A1 Top separator with intraseal for digester vessel in a pulp or fiber processing system |
| 06/13/2002 | US20020069992 Compression rings for column relief in continuous cooking vessels |
| 06/13/2002 | US20020069986 For producing uniform filtrate distribution in the blow dilution zone of the digester; for use in digestors that digest cellulosic fibrous material and produce cellulosic pulp |
| 06/04/2002 | US6398914 Measuring spectral intensities |
| 05/30/2002 | WO2002042550A1 Method for alkaline cooking of fiber material |
| 05/23/2002 | US20020060025 Pulper with extraction plate assembly having removable inserts and method of manufacturing same |