1
Jean Fran cedilla ois Revol, Donat L Godbout, Derek G Gray: Solidified liquid crystals of cellulose with optically variable properties. Pulp and Paper Research Institute of Canada, Swabey Ogilvy Renault, May 13, 1997: US05629055 (107 worldwide citation)

Solid films with novel optical properties are produced from colloidal suspensions of cellulose crystallites; the colloidal suspensions are prepared by acid hydrolysis of crystalline cellulose under carefully controlled conditions; the solid materials possess a helicoidal arrangement of the constitue ...


2
James Gareth Owen: Automatic control loop monitoring and diagnostics. Pulp and Paper Research Institute of Canada, E E Pascal, R A Wilkes, November 17, 1998: US05838561 (64 worldwide citation)

A method of diagnosing a malfunction of a process control system which includes at least one closed loop control loop comprising measuring a histogram of tracking error of the control loop, determining distortion of the tracking error relative to a Gaussian distribution, and indicating a malfunction ...


3
Harold V Green, Thomas J Fox, Anthony M Scallan: Lumen-loaded paper pulp, its production and use. Pulp and Paper Research Institute of Canada, Millen & White, April 9, 1985: US04510020 (45 worldwide citation)

Paper of improved properties is produced from pulp in which filler is selectively loaded within the fiber lumens by agitating a suspension of pulp and filler until the fiber lumens become loaded with filler, separating the residual suspended filler from the loaded fibers and vigorously washing the p ...


4
James Olson, Andrew G Robertson, Timothy D Finnigan: Imaging apparatus and method of fiber analysis. Pulp and Paper Research Institute of Canada, University of British Columbia, May 10, 1994: US05311290 (38 worldwide citation)

A method and apparatus for positioning, aligning and orienting fibers in flowing fluids, to permit fibers such as wood pulp fibers to be accurately imaged and rapidly measured with little operator involvement, utilizing a plugging resistant and fouling resistant sheath flow cell, is described. An em ...


5
Gilles Dorris: Process of producing kraft pulping liquor by the oxidation of white liquor in the presence of lime mud. Pulp and Paper Research Institute of Canada, Lawrence I Field, January 21, 1992: US05082526 (29 worldwide citation)

Sodium sulfide or hydrosulfide is oxidized to produce sodium polysulfide and sodium hydroxide. Under appropriate conditions, the oxidation may be pursued further to convert all the sodium sulfide into sodium thiosulfate. The oxidation is carried out at or above atmospheric pressure in a mixed reacto ...


6
Liebergott Norman: Bleaching of mechanical cellulosic pulp with ozone in the presence of a peroxygen compound. Pulp and Paper Research Institute of Canada, May 16, 1972: US3663357 (27 worldwide citation)

Bleaching of mechanical pulp in the form of fibers and fiber aggregates by adding a peroxygen compound to moist pulp to provide a mixture of pulp and peroxygen compound and thereafter treating said mixture with an ozone containing gaseous mixture.


7
Liebergott Norman, Yorston Frederic H, De Montigny Raimbault M A T, Tasman John E: Bleaching of a low-density, substantially uncompacted, porous fluffed cellulosic pulp. Pulp and Paper Research Institute of Canada, December 28, 1971: US3630828 (25 worldwide citation)

The bleaching of chemical wood pulp at high consistencies with gaseous bleaching agents is performed by repeatedly contacting the pulp, at a consistency above 15 percent and while unsupported, with radial spaced breaker arms extending from a rotating shaft thereby producing a comminuted pulp of low ...


8
Joseph G Dorica, Allan R Elliott: Process for reducing production of biomass during activated sludge treatment of pulp and paper mill effluents. Pulp and Paper Research Institute of Canada, Swabey Ogilvy Renault, November 2, 1999: US05976375 (22 worldwide citation)

A process for reducing the production of biomass during activated sludge treatment of pulp and paper mill effluents, involving a conditioning of the recycled activated sludge (RAS) prior to its return into the aeration tank is described. The conditioning is typically performed within the sludge retu ...


9
Alfred Wong, Steven Prahacs, Joseph Dorica: Treatment of pulp mill effluents. Pulp and Paper Research Institute of Canada, Millen & White, February 15, 1977: US04008161 (22 worldwide citation)

A multi-step method is provided for the purification of waste water, especially pulp mill effluents. It comprises a number of steps carried out in a specific sequence. The first step involves passing an oxygen-containing gas through the waste water while the waste water is in intimate contact with a ...


10
Mahmoud K Azarniouch, Steven Prahacs: Recovery of NaOH and other values from spent liquors and bleach plant effluents. Pulp and Paper Research Institute of Canada, Swabey O Renault, October 29, 1991: US05061343 (22 worldwide citation)

Oxidized weak black liquor or effluents from alkaline bleaching stages, particularly oxygen delignification and/or ozone and/or hydrogen peroxide bleaching effluents are treated in process stages which include an electrolytic cell to recover NaOH, lignin, O.sub.2, H.sub.2 and to achieve other import ...



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