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Class Information
Number: 162/18
Name: Paper making and fiber liberation > Processes of chemical liberation, recovery or purification of natural cellulose or fibrous material > Continuous chemical treatment or continuous charging or discharging > With compression, squeezing or compacting of fibrous material during charging
Description: Processes in which the raw fibrous material is subjected to compression at the point of entrance to the treating zone so as to form a plug sealing off the zone from the exterior thereof.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7445691 |
Impregnation of chips with an acid liquid prior to a sulphate pulping process |
Nov. 4, 2008 |
| 7384502 |
Process for impregnating, refining, and bleaching wood chips having low bleachability to prepare mechanical pulps having high brightness |
Jun. 10, 2008 |
| 7303649 |
Removal of inorganic elements from wood chips |
Dec. 4, 2007 |
| 7300540 |
Energy efficient TMP refining of destructured chips |
Nov. 27, 2007 |
| 7252739 |
Method for distributing cellulose pulp of low and medium consistency in order to form a uniform pulp web |
Aug. 7, 2007 |
| 7229524 |
Feeding arrangement for feeding of chips to chip bins |
Jun. 12, 2007 |
| 7147750 |
Extraction with compaction and springback considerations |
Dec. 12, 2006 |
| 6986829 |
Process and container for stacking high-consistency stock |
Jan. 17, 2006 |
| 6986828 |
Process for producing low DP microcrystalline cellulose |
Jan. 17, 2006 |
| 6946072 |
Method and apparatus for washing a fibre suspension |
Sep. 20, 2005 |
| 6841042 |
Feeding comminuted fibrous material using high pressure screw and centrifugal pumps |
Jan. 11, 2005 |
| 6544385 |
Channel pulper |
Apr. 8, 2003 |
| 6451163 |
Method of handling comminuted cellulosic fibrous slurry in a cylindrical vessel |
Sep. 17, 2002 |
| 6447645 |
Feeding cellulose material to a treatment vessel |
Sep. 10, 2002 |
| 6436233 |
Feeding cellulose material to a treatment vessel |
Aug. 20, 2002 |
| 6432264 |
Method of making a vessel assembly for handling comminuted cellulosic fibrous material |
Aug. 13, 2002 |
| 6419788 |
Method of treating lignocellulosic biomass to produce cellulose |
Jul. 16, 2002 |
| 6419786 |
Method for bleaching wood pulp containing recycled paper |
Jul. 16, 2002 |
| 6416621 |
Apparatus, process and pressure reactor for the treatment of solids with pressurized liquid gases |
Jul. 9, 2002 |
| 6409883 |
Methods of making fiber bundles and fibrous structures |
Jun. 25, 2002 |
| 6348127 |
Process for production of chemical pulp from herbaceous plants |
Feb. 19, 2002 |
| 6280567 |
System and method for treatment of cellulose-containing material prior to pulp digestion |
Aug. 28, 2001 |
| 6228213 |
Production of microcrystalline cellulose by reactive extrusion |
May. 8, 2001 |
| 6123808 |
Distribution of dilution liquor to the discharge of a cellulose pulp digester |
Sep. 26, 2000 |
| 5478439 |
Method for feeding cellulose pulp mixture to a pressurized continuous digester |
Dec. 26, 1995 |
| 5466334 |
Method and apparatus for mixing a treatment agent with a pulp suspension |
Nov. 14, 1995 |
| 5451296 |
Two stage pulp bleaching reactor |
Sep. 19, 1995 |
| 5319902 |
Mass tower and method of making the same |
Jun. 14, 1994 |
| 5296097 |
Method for reducing contaminants in pulp prior to ozone bleaching |
Mar. 22, 1994 |
| 5262003 |
Method and system for defibering paper making materials |
Nov. 16, 1993 |
| 5192396 |
Process for the continuous digestion of cellulosic fiber material |
Mar. 9, 1993 |
| 5183578 |
Process for the extraction or flushing out of a substance from a heterogenous system, and installation for carrying out the process |
Feb. 2, 1993 |
| 5120398 |
Arrangement for discharging pulp from a pulp treatment apparatus |
Jun. 9, 1992 |
| 4997578 |
Method and apparatus for dewatering and squeezing material |
Mar. 5, 1991 |
| 4997488 |
Combined physical and chemical treatment to improve lignocellulose digestibility |
Mar. 5, 1991 |
| 4983256 |
Method for the manufacture of a paper pulp for currency use |
Jan. 8, 1991 |
| 4968385 |
Method of preparing a plup using a fluidizing centrifugal pump during impregnation |
Nov. 6, 1990 |
| 4963270 |
Decker with partitions for filtrate fractions |
Oct. 16, 1990 |
| 4954221 |
Apparatus for feeding lignocellulose-containing material through a steam screen into a refiner |
Sep. 4, 1990 |
| 4915830 |
Pulp wash press |
Apr. 10, 1990 |
| 4897155 |
Method for producing low fines content pulp by subjecting cellulosic chips to low frequency compression-relaxation cycles |
Jan. 30, 1990 |
| 4869783 |
High-yield chemical pulping |
Sep. 26, 1989 |
| 4867846 |
Apparatus for feeding wood chips to a treatment bin |
Sep. 19, 1989 |
| 4838995 |
Process for bleaching cellulose pulp, a plant for preforming said process, and a screw press for use with said process and plant |
Jun. 13, 1989 |
| 4632729 |
Chip presteaming and air washing |
Dec. 30, 1986 |
| 4563243 |
Apparatus and a method for producing wood pulp in a hollow cylinder containing a rotatable screw |
Jan. 7, 1986 |
| 4451331 |
Process and apparatus for producing pulp |
May. 29, 1984 |
| 4350499 |
Vapor separating method and apparatus |
Sep. 21, 1982 |
| 4298425 |
Method and apparatus for refining lignocellulose-containing material to produce fiber pulp |
Nov. 3, 1981 |
| 4274786 |
Process and apparatus for continuously conveying particulate compressible fibrous material from a zone at a first gas pressure to a zone at a second gas pressure |
Jun. 23, 1981 |
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