| Patent Number |
Title Of Patent |
Date Issued |
| 7390669 |
Simultaneous and rapid determination of multiple component concentrations in a Kraft liquor process stream |
Jun. 24, 2008 |
| 7204914 |
System and method for controlling a processor including a digester utilizing time-based assessments |
Apr. 17, 2007 |
| 7074299 |
Process for using a phloroglucinol color delta to control blending, deinking and bleaching of groundwood-containing secondary pulp |
Jul. 11, 2006 |
| 6833054 |
Method and apparatus for adjusting chemical dosage of pulp processing stage |
Dec. 21, 2004 |
| 6524437 |
Process for peroxide bleaching wherein the concentrations of Mn and Fe are monitored and maintained |
Feb. 25, 2003 |
| 6447639 |
Process for controlling a digester using real time measurement of moisture content and species of wood |
Sep. 10, 2002 |
| 6361649 |
Method for the continuous cooking of chemical pulp |
Mar. 26, 2002 |
| 6340410 |
Method for delivering a variable flow of hydrogen peroxide to a bleaching vessel |
Jan. 22, 2002 |
| 6245196 |
Method and apparatus for pulp yield enhancement |
Jun. 12, 2001 |
| 6238517 |
Method for controlling oxygen delignification of pulp |
May. 29, 2001 |
| 6174409 |
Method to improve final bleached pulp strength properties by adjusting the CI02:03 ration within a single (D/Z) stage of the bleaching process |
Jan. 16, 2001 |
| 6153050 |
Method and system for controlling the addition of bleaching reagents to obtain a substantially constant percentage of pulp delignification across the first bleaching/delignifying stage |
Nov. 28, 2000 |
| 6123807 |
Method for the continuous cooking of pulp |
Sep. 26, 2000 |
| 6054019 |
Impregnation of fiber material in two subsequent concurrent impregnation zones |
Apr. 25, 2000 |
| 5985097 |
Method for suppressing undesired effects of transition and alkaline metal compounds during bleaching |
Nov. 16, 1999 |
| 5958181 |
Continuous cooking with a two-stage cool impregnation |
Sep. 28, 1999 |
| 5820830 |
Waste recovery and utilization in the kraft recovery process |
Oct. 13, 1998 |
| 5820729 |
Device and process for dissolving smelt from recovery boilers |
Oct. 13, 1998 |
| 5688367 |
Method of monitoring and recovering oxygen-rich gas from ozone bleaching |
Nov. 18, 1997 |
| 5674359 |
Continuous cooking of cellulosic fibrous material with cold alkali impregnation |
Oct. 7, 1997 |
| 5632859 |
Intergral pulp mill and method of constructing an integral mill |
May. 27, 1997 |
| 5582684 |
Method of determining degree of reduction in a sulfate liquor using IR and UV spectroscopy |
Dec. 10, 1996 |
| 5567274 |
Method of controlling pressurized ozone to a pulp delignification reactor |
Oct. 22, 1996 |
| 5456799 |
Method for controlling activation of lignocellulosic material in the presence of a nitrate containing liquid |
Oct. 10, 1995 |
| 5403441 |
Method for controlling an ozone bleaching process |
Apr. 4, 1995 |
| 5364505 |
Pressurized ozone pulp delignification reactor and a compressor for supplying ozone to the reactor |
Nov. 15, 1994 |
| 5306391 |
Control of chemical dosage to a pulp slurry |
Apr. 26, 1994 |
| 5282931 |
Determination and control of effective alkali in kraft liquors by IR spectroscopy |
Feb. 1, 1994 |
| 5207870 |
Process and equipment for pretreatment of cellulosic raw material |
May. 4, 1993 |
| 5203964 |
Process for producing cellulose from lignin containing raw materials using an enzyme or microorganism while monitoring and maintaining the redox potential |
Apr. 20, 1993 |
| 5192396 |
Process for the continuous digestion of cellulosic fiber material |
Mar. 9, 1993 |
| 5108655 |
Foam monitoring control system |
Apr. 28, 1992 |
| 5080755 |
Process for the continuous digestion of cellulosic fiber material |
Jan. 14, 1992 |
| 5066362 |
Extended delignification in pressure diffusers |
Nov. 19, 1991 |
| 5032223 |
Procedure for determining and controlling the composition proportions of wood chip mixes in alkaline pulp digestion processes |
Jul. 16, 1991 |
| 4952276 |
Method for measuring the bleaching content of pulp bleaching liquor using a chemiluminescent reagent |
Aug. 28, 1990 |
| 4895618 |
Method of controlling alkaline pulping process |
Jan. 23, 1990 |
| 4878998 |
Method for controlling peroxide bleaching in a plurality of bleaching stages |
Nov. 7, 1989 |
| 4849052 |
Batch digester multi-stage pulping process |
Jul. 18, 1989 |
| 4840703 |
Method for controlling an oxygen bleaching |
Jun. 20, 1989 |
| 4764251 |
Method for the impregnation and cooking of lignocellulosic material by a batch cooking using spent impregnation liquor from a previous batch |
Aug. 16, 1988 |
| 4735684 |
Multistage pulp bleaching control process |
Apr. 5, 1988 |
| 4601787 |
Method of bringing a digester up to cooking temperature |
Jul. 22, 1986 |
| 4595455 |
Method for controlling batch alkaline pulp digestion in combination with continuous alkaline oxygen delignification |
Jun. 17, 1986 |
| 4536253 |
Process for controlling the properties of white liquor |
Aug. 20, 1985 |
| 4498955 |
Control of active alkali in black liquor |
Feb. 12, 1985 |
| 4451331 |
Process and apparatus for producing pulp |
May. 29, 1984 |
| 4419184 |
Method for control of chemicals during gas treatment of suspensions |
Dec. 6, 1983 |
| 4345913 |
Method and apparatus for determining the lignin content in pulp |
Aug. 24, 1982 |
| 4220498 |
Oxygen reactor systems pulp reject treatment |
Sep. 2, 1980 |
