| Patents for D21C 7 - Digesters (1,988) |
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| 10/31/2012 | EP2516731A2 Method and process for dry discharge in a pressurized pretreatment reactor |
| 10/25/2012 | US20120267064 Lignosulfonate of a certain quality and method of preparation of lignosulfonate of a certain quality |
| 10/24/2012 | CN202500052U Automatic control system of cooking process for papermaking |
| 10/24/2012 | CN102747640A Method for recycling raffinate and sewage caused by papermaking and pulping |
| 10/24/2012 | CN102747639A Device and method for controlling flow reactor used for processing lignocellulose biomass |
| 10/18/2012 | US20120261084 System and method for the pumped feed of chips to a continuous digester |
| 10/17/2012 | CN102733227A Heat energy recovery device |
| 10/10/2012 | CN202482687U Overhead valve of pulp digester |
| 10/10/2012 | CN202482686U Pulping cooking device with inner-outer circulation function |
| 10/09/2012 | US8282780 Method and apparatus for pre-treatment of fibre material to be used in the manufacture of paper, board or the like |
| 10/04/2012 | WO2012134791A1 Reactor vessel having single convergence sidewall plates |
| 10/04/2012 | WO2012134358A1 Method and arrangement for adding treatment liquors to cellulose material in a down flow vessel |
| 10/03/2012 | EP2504486A1 Method and system for thin chip digester cooking |
| 10/03/2012 | CN202466273U Stainless steel composite spherical digester |
| 10/03/2012 | CN102713054A Method and arrangement for improving a washing step after completed cooking in continuous digester |
| 10/03/2012 | CN102704308A Artificial board fiber separation process capable of prolonging service lives of abrasive discs |
| 10/03/2012 | CN101760974B Process for performing ammonium sulfite pulping by using sulfur-containing flue gas absorber |
| 10/03/2012 | CN101654882B Pulping process of grass fibers |
| 10/03/2012 | CN101649567B Grass fiber pulping process |
| 10/03/2012 | CN101613970B Method for preparing bagasse dissolving pulp and pre-extracting hemicellulose and product thereof |
| 10/03/2012 | CN101565907B Bagasse alkaline pulping method by pre-extracting hemicellulose and product thereof |
| 09/27/2012 | US20120241112 Method and arrangement for improving a washing step after completed cooking in a continuous digester |
| 09/26/2012 | CN202450365U Grass raw material replacement cooker |
| 09/26/2012 | CN102695830A System and method for the pumped feed of chips to a continuous digester |
| 09/20/2012 | US20120234511 Vapor phase hydrolysis vessel and methods related thereto |
| 09/19/2012 | EP2500466A1 Method and process for the pretreatment of lignocellulosic biomass |
| 09/19/2012 | CN102677516A Cold blow method for pulping in papermaking |
| 09/12/2012 | EP2496757A1 System and method for the pumped feed of chips to a continuous digester |
| 09/12/2012 | CN102666975A Method and process for dry discharge in a pressurized pretreatment reactor |
| 09/12/2012 | CN102666974A Method and system for thin chip digester cooking |
| 08/30/2012 | US20120216971 Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels |
| 08/29/2012 | CN102212978B High-concentration digesting, bleaching and pulping integrated machine |
| 08/29/2012 | CN102182092B Continuous cooking anti-reverse spraying device |
| 08/29/2012 | CN102108648B Cooking and blowing equipment |
| 08/23/2012 | US20120211183 Method and apparatus to produce pulp using pre-hydrolysis and kraft cooking |
| 08/15/2012 | CN102639785A Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels |
| 08/08/2012 | CN202369849U Special connecting pipe for connecting bamboo chip double helixes |
| 08/08/2012 | CN101760975B Circulation process for performing ammonium sulfite pulping by using sulfur-containing flue gas absorber |
| 08/02/2012 | WO2012102650A1 Continuous digester with a bottom scraper equipped with draining apertures |
| 08/02/2012 | US20120193050 Method and assembly for processing cellulose pulp of wood processing industry |
| 08/01/2012 | CN202359439U Pouring hopper device |
| 08/01/2012 | CN102619122A Upper circulation device of vertical continuous digester |
| 07/25/2012 | CN102605663A Wood chip flow monitoring system and stable pulping continuous digesting method |
| 07/18/2012 | CN101451322B Grass type un-bleaching pulp, preparation method and use thereof |
| 07/18/2012 | CN101440582B Treatment vessel for straw or other light bulky material |
| 07/17/2012 | US8221584 Method and apparatus for removing sheets of fibres from banana plants for the production of paper products |
| 07/17/2012 | CA2508087C Method and system for feeding cellulose chips to a high pressure continuous cooking system |
| 07/11/2012 | CN102575422A High temperature lignin separation process |
| 07/10/2012 | US8216426 Extraction bedplate and method for manufacturing an extraction bedplate |
| 07/10/2012 | CA2517612C An arrangement for adjusting rotor position in a rotating sluice |
| 07/05/2012 | US20120168102 Pulping process for quality protection including methods for hemicellulose extraction and treatment of hemicellulose-extracted lignocellulosic materials |
| 07/04/2012 | CN202298329U 进料器可替换内衬式压缩管 Feeder can replace the lining compression tube |
| 07/04/2012 | CN202298328U 一体式涡流制浆设备 One-vortex pulping equipment |
| 07/04/2012 | CN102037182B Feeding system comprising parallel pumps for a continuous digester |
| 07/04/2012 | CN102037181B Feeding system comprising pumps in parallel for a continuous digester |
| 07/04/2012 | CN101899794B Green process for extracting fibers from plants |
| 07/04/2012 | CN101748633B Novel cellulose extraction process |
| 06/28/2012 | WO2012087228A1 A method of controlling a pulping process in a feed-forward manner |
| 06/27/2012 | EP2467533A1 Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels |
| 06/27/2012 | CN102517951A Heating device for cooking boiler |
| 06/27/2012 | CN101638865B Natural color copy paper and preparation method thereof |
| 06/27/2012 | CN101638863B Natural color food wrapper and preparation method thereof |
| 06/27/2012 | CN101451323B Un-bleaching pulp prepared by alkaline steam cooking wheat straw raw material, preparation method and use thereof |
| 06/26/2012 | CA2526406C Chemimechanical desilication of nonwood plant materials |
| 06/20/2012 | CN202279988U 用于浆粥加热的蒸汽加热罐 Pulp porridge for heating steam heating tank |
| 06/20/2012 | CN101809227B An apparatus for discharging pulp from a vessel, method of discharging pulp form a vessel and method of upgrading a pulp vessel |
| 06/20/2012 | CN101451321B Low brightness pulp prepared by ammonium sulfite steam cooking wheat straw raw material, preparation method and use thereof |
| 06/13/2012 | CN102086609B Sulfate pulping process by mixing soft wood with hard wood |
| 06/13/2012 | CN101949104B Pulp batch cooking parameter optimization method |
| 06/12/2012 | US8197639 Vapour phase digester and a method for continuous cooking |
| 05/30/2012 | CN202247506U Novel ramulus mori continuous digestion and pulping device |
| 05/30/2012 | CN101638864B Natural color bento box and preparation method thereof |
| 05/30/2012 | CN101638862B Natural color offset plate printing paper and preparation method thereof |
| 05/30/2012 | CN101617081B Vapour phase digester and a method for continuous cooking |
| 05/30/2012 | CN101451320B Grass type low brightness pulp, preparation method and use thereof |
| 05/23/2012 | EP2454409A1 High temperature lignin separation process |
| 05/23/2012 | CN102154899B Base paper of sandpaper and production method thereof |
| 05/22/2012 | US8181570 Plug screw feeder for feeding cellulose pulp/chips |
| 05/17/2012 | US20120118517 Solid/fluid separation device and method for treating biomass including solid/fluid separation |
| 05/15/2012 | US8177937 Method and an apparatus for controlling a flow of pulp suspension |
| 05/10/2012 | WO2012060749A1 Top separator for steam/liquid digester |
| 05/10/2012 | US20120111513 Arrangement and method for the continuous steam pre-treatment of chips during the production of cellulose pulp |
| 05/09/2012 | CN102449233A System and method for the regulation of a continuous vapour phase digester |
| 05/09/2012 | CN102444044A Retinervus luffae fructus pulp for manufacturing viscose fiber and preparation method thereof |
| 05/09/2012 | CN101883892B Digester screen for a continuous cellulose pulp digester |
| 05/08/2012 | US8172984 Digester with improved space utilization and/or sample holder |
| 05/02/2012 | CN101451312B Method for preparing bleached chemical pulp by using grass type plants as raw materials |
| 04/17/2012 | US8157964 Installation for implementing a method for producing paper pulp, lignins and sugars and production method using such an installation |
| 04/11/2012 | EP1769118B1 Screen device for a digester for producing pulp |
| 04/10/2012 | US8152965 Method and device for emptying the floor of a soda recovery boiler |
| 04/10/2012 | CA2827665A1 Reactor vessel having single convergence sidewall plates |
| 04/04/2012 | CN202181476U 蒸煮循环系统 Cooking circulatory system |
| 04/04/2012 | CN102405318A 用于运输纤维素原料的方法和装置 Method and apparatus for transporting the raw cellulose material |
| 04/04/2012 | CN101634117B 一种以芦苇为原料制备纸浆板的方法 A kind of reed pulp was prepared from the plate method |
| 03/28/2012 | CN102395927A A system and a method for optimization of continuous digestion process |
| 03/21/2012 | CN101451314B Method for preparing high-hardness pulp by using grass type plants as raw materials |
| 03/21/2012 | CN101353868B Alkaline process cooking method for preparing high-hardness pulp from gramineae plants |
| 03/14/2012 | EP1592838B1 An arrangement for and a method of treating pulp, and a method of modernizing a pulp tower |
| 03/14/2012 | CN202164498U 快速制浆机 Quick pulper |
| 03/08/2012 | US20120058534 Optimized biogas (biomethane) production process |