| Patents for D21C 7 - Digesters (1,988) |
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| 10/15/2013 | CA2650913C Method and apparatus for conveying a cellulosic feedstock |
| 10/09/2013 | EP2647987A1 Electrode for the analysis of liquors during paper production, and method of using it |
| 10/02/2013 | CN103334335A Preparation method of pollution-free high-whiteness palm silk paper pulp and application of paper pulp in paper product |
| 10/02/2013 | CN103334331A TCE bleaching technology for sulfate pulp of growing poplar by biological chemical method |
| 09/25/2013 | CN203212924U Black liquor tank suitable for replacing cooking |
| 09/25/2013 | CN203212923U Cellulosic biomass ethanol horizontal tube continuous digester steam explosion device |
| 09/24/2013 | US8540845 Method and system for stabilizing dry-based density of wood chips to be fed to a chip refining process |
| 09/22/2013 | CA2773010A1 Method and arrangement for measuring and controlling chip and/or liquor level |
| 08/29/2013 | WO2013126007A1 Arrangement, system and method for handling non-wood plant material |
| 08/28/2013 | CN103270214A A method of controlling a pulping process in a feed-forward manner |
| 08/14/2013 | EP2626462A1 Flash tank with adjustable inlet and method for adjusting inlet flow to a flash tank |
| 08/14/2013 | CN101275374B Pulp cleaning agent, pulp manufacturing method and pulp cleaning method |
| 07/31/2013 | CN203096499U Liquid displacement system for grass raw material displacement digester |
| 07/31/2013 | CN203096498U Feeding device for grass raw material digester |
| 07/31/2013 | CN203096497U Steam/liquid charger |
| 07/24/2013 | CN203080351U Simple and easy spherical digester charger |
| 07/24/2013 | CN203080350U End cap structure of boiling pipe |
| 07/18/2013 | WO2013105888A1 Profile bar screen for digester vessels |
| 07/17/2013 | CN203065882U Papermaking ventilation closed gas hood lift door |
| 07/16/2013 | US8486228 Lignocellulosic biomass saccharification pre-treatment device |
| 07/16/2013 | US8486225 Bleached fiber product production method, apparatus to be used therefor, and bleached fiber product produced thereby |
| 07/10/2013 | CN203049363U Liquid circulation system of grass material displacement digester |
| 07/10/2013 | CN203049362U Grass material displacement digester |
| 07/10/2013 | CN203049361U Pulp intermittent replacement cooking production system |
| 07/09/2013 | US8480855 Method and apparatus for pre-treatment of fibre material to be used in the manufacture of paper, board or the like |
| 07/03/2013 | CN103184702A Papermaking pulping reactor |
| 07/02/2013 | CA2567046C Central screen |
| 06/26/2013 | EP2607547A1 Screen basket having diagonal slots for top separator of a digester |
| 06/26/2013 | CN203021853U Vertical digester temperature control device |
| 06/25/2013 | CA2602580C Arrangement for feeding a slurry of chips and liquid |
| 06/19/2013 | CN203007716U Digester for pulping through pre-hydrolytic sulfate process |
| 06/19/2013 | CN203007715U Vertical type boiling pan |
| 06/12/2013 | EP2602419A1 Window guard device |
| 06/12/2013 | CN202989651U Piston type spiral feeder in plant fiber continuous stewing process |
| 06/12/2013 | CN103147336A Screen basket having diagonal slots for top separator of a digester |
| 06/05/2013 | CN103132359A Transverse tube continuous cooking and steam explosion apparatus for biomass cellulosic ethanol |
| 06/05/2013 | CN102016164B Feeding system comprising pumps in parallel for a continuous digester |
| 05/29/2013 | CN202954258U Liquid filling device |
| 05/29/2013 | CN101532262B Screen plates having diagonal slots with curved inlets for a digester |
| 05/22/2013 | CN103114484A Recovery and comprehensive utilization method of waste heat of rotary spherical digester |
| 05/15/2013 | EP2591165A1 Method and system for impregnating chips |
| 05/15/2013 | CN202936665U Combined charging cover of cooking boiler for papermaking |
| 05/15/2013 | CN101387087B Method and system for semi-chemical pulping |
| 05/08/2013 | EP2588664A1 Organosolv process |
| 05/08/2013 | CN103097606A Method and system for impregnating chips |
| 05/02/2013 | US20130105098 Method and system for impregnating chips |
| 04/30/2013 | CA2741602C Biomass hydrothermal decomposition apparatus, temperature control method thereof, and organic raw material production system using biomass material |
| 04/30/2013 | CA2741598C Biomass hydrothermal decomposition apparatus, temperature control method thereof, and organic raw material production system using biomass material |
| 04/25/2013 | US20130098569 Method and system for efficient production of dissolving pulp in a kraft mill producing paper grade pulp with a continuous type digester |
| 04/24/2013 | CN202898873U Water hammer type unplugging device at discharge port of cooking boiler |
| 04/24/2013 | CN101760988B Mixed pulp material and cultural paper prepared from the same |
| 04/23/2013 | US8424451 Automatically controlled steam flaking systems and methods |
| 04/17/2013 | EP2580390A1 Method for contaminant removal in paper production |
| 04/16/2013 | US8419900 Apparatus for pretreatment for saccharification of lignocellulose biomass |
| 04/10/2013 | CN102226319B Batch cooking cold blow device and cold blow method |
| 04/03/2013 | CN202849862U Two-section type self-heating cooking separator with spiral structure |
| 04/03/2013 | CN103015245A Plant fiber continuous evaporation piston-type screw feeder |
| 04/02/2013 | US8409402 Method and apparatus for filling and cleaning a pulp tower |
| 03/28/2013 | WO2013041207A1 Device and method for hydrothermally pulping dried, lignified lignocellulosic biomass |
| 03/27/2013 | CN101451324B Pulp and black liquor prepared by grass type raw material, preparation method and use thereof |
| 03/20/2013 | CN102978987A Vertical cooker |
| 03/19/2013 | CA2571408C Screen assembly for a pulp digester |
| 03/14/2013 | US20130062031 Digester and digestion process |
| 03/06/2013 | CN102953287A Preparation method for rape stem paper pulp |
| 02/20/2013 | CN102936862A System for producing pulp through intermittent replacement and stewing |
| 02/19/2013 | US8377261 High pressure sluice feeder |
| 02/13/2013 | CN102926260A Liquid replacing system of replacing and cooking pot |
| 02/12/2013 | CA2592887C Method for controlling a pulping process |
| 02/05/2013 | US8366876 Method and arrangement for improving a washing step after completed cooking in a continuous digester |
| 02/05/2013 | US8366875 Method and arrangement for wash after completed digestion in a continuous digester for the production of cellulose pulp |
| 01/30/2013 | CN202705774U Device for catalytic pulping of low-boiling point solvent |
| 01/29/2013 | US8361279 Extraction bedplate and method for manufacturing an extraction bedplate |
| 01/23/2013 | CN202688755U Energy storage type valve-opening device in steam explosion machine |
| 01/23/2013 | CN101982607B Cooking agent for papermaking and pulping and preparation method thereof |
| 01/23/2013 | CN101906730B Non-wood fiber continuous cooking method and device |
| 01/16/2013 | CN202671952U Novel steaming/boiling container |
| 01/08/2013 | CA2537087C Screen device for a digester for producing pulp |
| 12/26/2012 | CN202626735U Digester charging structure |
| 12/26/2012 | CN202626734U Device applied to alkaline cooking and pretreating of straw raw materials |
| 12/26/2012 | CN101680551B Mechanical seal device |
| 12/20/2012 | WO2012061085A3 Hydrolysis systems and methods |
| 12/19/2012 | CN202610638U Digesting device capable of extracting black liquor in digesting insulating process |
| 12/19/2012 | CN202610637U Digesting device capable of extracting black liquor in digesting heating process |
| 12/19/2012 | CN202610636U Spouting storage device with windows |
| 12/19/2012 | CN202610635U Cold spraying device |
| 12/12/2012 | CN102251426B Head pressure flow adjusting device for screw extruder |
| 12/06/2012 | US20120305209 Hardwood alkaline pulping processes and systems |
| 12/05/2012 | CN202577022U Steam discharge pipe for rotary spherical digester |
| 12/05/2012 | CN202577021U Steam inlet pipe for spherical digesters |
| 12/05/2012 | CN202577020U Anti-skid nail for globe digester |
| 12/05/2012 | CN102806591A Manufacturing process for ultra light fiber board |
| 11/28/2012 | CN102803604A Compact feed system and method for comminuted cellulosic material |
| 11/28/2012 | CN102797189A Two-section self-heating helical-structure boiling separator |
| 11/28/2012 | CN102797188A Numerical control continuous steam explosion machine |
| 11/21/2012 | CN102787521A Cooking liquid compensation technology used for intermittent cooking |
| 11/08/2012 | US20120279669 Method of treating liquid flows at a chemical pulp mill |
| 11/07/2012 | CN102767105A Energy-storing valve opening device of steam explosion machine |
| 11/06/2012 | US8303768 Method of monitoring and inhibiting scale deposition in pulp mill evaporators and concentrators |
| 11/06/2012 | CA2604782C An apparatus for distributing a pulp flow |
| 10/31/2012 | EP2516732A1 Method and arrangement for improving a washing step after completed cooking in a continuous digester |