| Patents for D21C 7 - Digesters (1,988) |
|---|
| 01/11/2005 | US6841042 Feeding comminuted fibrous material using high pressure screw and centrifugal pumps |
| 01/04/2005 | CA2265872C Method and apparatus for pulping with controlled heating to improve delignification and pulp strength |
| 12/30/2004 | US20040261960 Mixture of chips and process liquid is fed to inlet of digester system velssel; chips are impregnated and cooked; dissolved pulp is fed out of the digester system; liquid which is continually extracted is retained outside the digester system during a dwell time without any heating above 140 degrees |
| 12/23/2004 | US20040256065 Method for producing corn stalk pulp and paper products from corn stalk pulp |
| 12/22/2004 | EP1488038A1 Method for the feed of cellulose chips during the continuous cooking of cellulose |
| 12/18/2004 | WO2005001195A1 Method for producing corn stalk pulp and paper products from corn stalk pulp |
| 12/18/2004 | CA2485520A1 Method for producing corn stalk pulp and paper products from corn stalk pulp |
| 12/14/2004 | CA2222664C Dissolved solids control in pulp production |
| 12/09/2004 | US20040244932 Container with discharging device |
| 12/02/2004 | US20040238133 Energy efficiency; compaction of wood chips using plug screw |
| 11/18/2004 | US20040226670 Top separator for gas phase and hydraulic phase continuous digesters and method for converting digester |
| 11/17/2004 | CN1546788A Pulp and paper making process of vert material continuous and intermittent steaming and cooking |
| 10/27/2004 | EP1470288A1 Continuous cooking of cellulose pulp with improved heat economy |
| 10/20/2004 | EP1285114A4 Methods for analyzing boron-containing alkaline pulping liquors |
| 09/23/2004 | DE102004010196A1 Verfahren und Vorrichtung zum Austragen von lignozellulosem Rohmaterial aus einem Kocher und zur Förderung des Rohmaterials zu einem Refiner Method and apparatus for discharging a digester from lignocellulosic raw material and for the promotion of the raw material to a refiner |
| 09/22/2004 | EP1458926A1 Method and arrangement for impregnating chips |
| 09/22/2004 | CN1531615A Process and apparatus for removal of scale build-up |
| 09/21/2004 | CA2285714C Continuous digester with inverted top separator |
| 09/16/2004 | WO2004079086A1 An arrangement for adjusting rotor position in a roting sluice |
| 09/08/2004 | EP1454010A1 Method and system for the treatment of pulp prior to ozone bleaching |
| 09/08/2004 | EP1454009A1 Process for continuously cooking chemical cellulose pulp |
| 09/08/2004 | EP0894161B1 System for feeding a suspension to a pressurized vessel |
| 09/07/2004 | CA2404796C Low temperature gas phase continuous digester |
| 09/01/2004 | CN2637536Y Paper pulp erupled energy recovery device |
| 08/26/2004 | WO2004072363A1 An arrangement for and a method of treating pulp, and a method of modernizing a pulp tower |
| 08/26/2004 | CA2515693A1 An arrangement for and a method of treating pulp, and a method of modernizing a pulp tower |
| 08/25/2004 | EP1448845A2 Production of pulp from cellulosic fibrous raw materials and recovery of chemicals and energy from pulp liquors |
| 08/12/2004 | US20040154760 Extraction, crushing, splitting; multistage process; contorlling temperature |
| 07/22/2004 | US20040140068 Feeding arrangement for feeding of chips to chip bins |
| 07/15/2004 | US20040138445 Using combination of high frequency rotation, pressurization and digestion to extract lignins, hemicellulose and cellulose from biomass; enantiomers and drug design |
| 07/13/2004 | CA2149434C Digester for continuous cooking of fibre material |
| 07/08/2004 | US20040129630 Slotted screen for digester |
| 07/07/2004 | EP0870083B1 Pumping of medium consistency, high temperature pulps from stand pipes |
| 07/06/2004 | CA2149535C Digester for continuous cooking of fibre material |
| 06/30/2004 | CN2622236Y Cone-pipe of material feeding screw |
| 06/30/2004 | CN2622235Y Screw for returning material |
| 06/22/2004 | CA2246024C Tapered screen assembly for a cellulose pulp digester |
| 06/22/2004 | CA2158957C Scraper device |
| 06/17/2004 | US20040112554 Cooking; reducing wood to liquid ratios; multistage; adjusting alakli concentration; extraction cycles |
| 06/10/2004 | US20040108084 Method for supplying washing liquid to a process for cooking cellulose pulp |
| 05/26/2004 | CN1151328C Dogstail pulp large liquor ratio circular heating replacing degestion technology |
| 05/13/2004 | US20040089430 Continuous production of pulp from wood chips; preheating chips; impregnating with liquor; high speed heating; cooling, pulping |
| 04/27/2004 | CA2228984C Low temperature gas phase continuous digester |
| 04/22/2004 | WO2003014467A3 Production of pulp from cellulosic fibrous raw materials and recovery of chemicals and energy from pulp liquors |
| 04/20/2004 | CA2398488C Enhancements in pulping with dissolved solids control |
| 04/13/2004 | US6719878 Method for avoiding mechanical damage of pulp |
| 04/06/2004 | US6716307 Process and system for the removal of scale build-up |
| 04/01/2004 | US20040060674 Method for measuring the percent consistency of pulp leaving a blow tank |
| 04/01/2004 | US20040060672 Continuous cooking of cellulose pulp with improved heat economy |
| 03/25/2004 | US20040055718 Methods for analyzing boron-containing alkaline pulping liquors |
| 03/17/2004 | EP1397550A1 Method for supplying washing liquid to a process for cooking cellulose pulp |
| 03/16/2004 | CA2198719C Cooking with spent liquor pretreatment of cellulose material |
| 03/16/2004 | CA2149423C Process for continuous cooking of pulp |
| 03/09/2004 | US6703618 Method and measurement device for measuring suspension |
| 03/04/2004 | US20040040684 Arrangement for feeding pulp to a bleaching tower |
| 03/02/2004 | US6699357 Fiber material and cooking liquor are introduced at top of digester and pulp is discharged from bottom via line in which pulp is maintained at same pressure level to pressurized wash; increased production in overloaded digesters |
| 03/02/2004 | CA2175666C Implementation of dissolved solids profiling |
| 02/10/2004 | CA2266987C Method and system for feeding comminuted fibrous material |
| 01/28/2004 | EP1383955A1 Continuous digester for cellulose pulp including method and recirculation system for such digester |
| 01/22/2004 | WO2004007834A1 A continuous process for the cooking of cellulose-besed pulp and a pulp digester applicable for the same |
| 01/15/2004 | WO2004005609A1 A method and a digester for the continuous cooking of wood raw material to cellulose pulp |
| 01/15/2004 | US20040007343 Slotted screen for digester |
| 01/15/2004 | US20040007142 Apparatus for treating lignocellulose material and method associated thereto |
| 01/14/2004 | EP1379474A2 Process and apparatus for the removal of scale build-up |
| 01/07/2004 | EP1378370A2 Heat transfer recording medium and printed product |
| 01/06/2004 | US6673201 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. |
| 12/30/2003 | CA2273146C Dissolved solids control in pulp production |
| 12/30/2003 | CA2159998C Dissolved solids control in pulp production |
| 12/24/2003 | WO2003106765A1 Method and arrangement for impregnating chips |
| 12/02/2003 | CA2251956C Method and apparatus for filling a pulp tower |
| 11/27/2003 | WO2003097931A1 A method for the continuous cooking of wood raw material for cellulose pulp |
| 11/20/2003 | WO2003095142A1 Working device for inner wall surface of tower tank, and inner wall surface working method using the same |
| 11/20/2003 | CA2473926A1 Working device for inner wall surface of tower tank, and inner wall surface working method using the same |
| 11/18/2003 | CA2192406C Method and apparatus for automated monitoring of pulp retention time |
| 11/13/2003 | WO2003093572A1 Apparatus for treating lignocellulose material and method associated thereto |
| 11/13/2003 | US20030209335 Extraction liquids from cellulose slurry |
| 11/13/2003 | CA2484850A1 Apparatus for treating lignocellulose material and method associated thereto |
| 11/06/2003 | US20030205343 Continuous digester |
| 11/04/2003 | US6641336 High pressure feeder rotor having conduits for pressure equalization |
| 10/30/2003 | US20030201213 Combined sand and liquor separation for chip transport in pulp processing |
| 10/30/2003 | US20030201080 Compression rings for column relief in continuous cooking vessels |
| 10/21/2003 | US6635147 Method for analyzing boron-containing alkaline pulping liquors |
| 10/14/2003 | CA2213946C Handling fibrous material used to produce cellulose pulp |
| 10/02/2003 | US20030186031 Heat transfer recording medium and printed product |
| 10/01/2003 | CN1445412A Pulping method of non-wood fibers with no black liquor drained off as well as its boiler |
| 09/25/2003 | WO2003078727A1 Method for the feed of cellulose chips during the continuous cooking of cellulose |
| 09/24/2003 | EP1346103A1 Method for alkaline cooking of fiber material |
| 09/23/2003 | US6623572 Pulper with extraction plate assembly having removable inserts and method of manufacturing same |
| 09/18/2003 | US20030176669 Process for obtaining bio-functional fractions from biomass |
| 09/18/2003 | US20030173047 Feeding comminuted fibrous material using high pressure screw and centrifugal pumps |
| 09/17/2003 | EP0907787B1 Distributing device for paper pulp |
| 08/26/2003 | CA2217694C Heat recovery from spent digester cooking liquor |
| 08/12/2003 | US6605180 Fiber material and cooking liquor are introduced at top of digester and pulp is discharged from bottom via line in which pulp is maintained at same pressure level to pressurized wash; increased production in overloaded digesters |
| 08/07/2003 | US20030145963 Gas phase continuous digester having an inverted top separator with liquor injection |
| 08/07/2003 | US20030145962 System and for improving the movement and discharge of material from vessels |
| 07/31/2003 | WO2003062525A1 Continuous cooking of cellulose pulp with improved heat economy |
| 07/30/2003 | EP0988414B1 Method for continuous cooking in a single-vessel digester |
| 07/24/2003 | WO2003060229A1 Process for continuously cooking chemical cellulose pulp |
| 07/17/2003 | WO2003020481A3 Apparatus and method for pre-treatment of wood chips |
| 07/17/2003 | US20030131956 Well suited for modifying existing pulp digesters without the need for incorporating additional liquor extraction screens. |