| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 02/16/1994 | EP0420860B1 Process and apparatus for the manufacture of pulp for paper, board, fiberboard and similar products |
| 02/15/1994 | US5286347 Melamine formaldehyde polymer for pitch control method |
| 02/15/1994 | CA1326942C Ozone treatment of cellulose pulp |
| 02/09/1994 | EP0582042A1 Process for modifying the properties of deinked waste paper pulps, especially the fiber classification and installation for carrying out the process |
| 02/09/1994 | EP0396721B1 Method of and device for fractionating suspensions |
| 02/03/1994 | WO1994002680A1 Hydrocyclone photo-reactor |
| 02/02/1994 | EP0581631A1 Selective treatment of pulp with ozone |
| 02/02/1994 | EP0581446A1 Method for the treatment of mechanical pulps |
| 02/02/1994 | EP0580710A1 Novel microorganisms and novel enzymes |
| 02/01/1994 | US5282932 Process for pH and fire control in pulp balers |
| 02/01/1994 | CA2101188A1 Selective treatment of pulp with ozone |
| 01/27/1994 | DE4224607A1 New biodegradable ether carboxylate stabilising agent - useful for oxidative or reductive bleaching of TMP, CTMP, mechanical wood pulp or chemical pulp and for de-inking waste paper |
| 01/26/1994 | EP0579744A1 Method for reducing colored matter from bleach effluent using a dzd bleach sequence |
| 01/26/1994 | EP0579708A1 Lipase-catalyzed ester hydrolysis |
| 01/26/1994 | EP0579672A1 Xylanase, corresponding recombinant dna sequence, xylanase containing agent, and use of the agent |
| 01/25/1994 | US5282131 Control system for controlling a pulp washing system using a neural network controller |
| 01/20/1994 | WO1994001616A1 White liquor oxidation for bleach plant use |
| 01/20/1994 | WO1994001615A1 Process for bleaching pulp in conjunction with adsorption of metals |
| 01/20/1994 | WO1994001541A1 C. antarctica lipase and lipase variants |
| 01/20/1994 | WO1994001538A1 A novel cellobiose oxidase, an enzymatic agent and a process for treating paper pulp |
| 01/20/1994 | WO1994001532A1 ALKALOPHILIC BACILLUS sp. AC13 AND PROTEASE, XYLANASE, CELLULASE OBTAINABLE THEREFROM |
| 01/20/1994 | CA2139492A1 A novel cellobiose oxidase, an enzymatic agent and a process for treating paper pulp |
| 01/19/1994 | EP0578987A1 Process for the preparation of a mixture of sodium silicate and another salt and use of this mixture |
| 01/18/1994 | US5279709 Method and apparatus for improving the control and treatment of fiber suspension flow |
| 01/18/1994 | CA1326112C Chlorine dioxide oxidation of mill effluent color |
| 01/16/1994 | CA2100374A1 Pitch control treatment |
| 01/12/1994 | EP0578305A1 Process of delignification of a chemical pulp |
| 01/12/1994 | EP0578304A1 Process for bleaching a chemical paper pulp |
| 01/12/1994 | EP0578303A1 Process for the delignification of a chemical paper pulp |
| 01/12/1994 | EP0578284A2 Mixing apparatus for improving the treatment of fibre suspension |
| 01/12/1994 | CN1023502C Process and apparatus for mannfacture of pulp for paper, board, fiberboard and similar products |
| 01/11/1994 | US5277760 Process for the manufacture of pulp for paper, and fiberboard products using alkaline cooking chemical and oxygen in a closed, continuous and pressurized tube system |
| 01/11/1994 | CA1325868C Process for bleaching mechanical wood pulp |
| 01/07/1994 | CA2099828A1 Delignification process for chemical pulp |
| 01/07/1994 | CA2099827A1 Bleaching process for chemical pulp |
| 01/07/1994 | CA2099513A1 Delignification process for chemical pulp |
| 01/06/1994 | WO1994000234A1 Method for delignifying and bleaching a lignocellulose material |
| 01/06/1994 | WO1994000227A1 Device for admixing a processing agent to a pulp suspension |
| 01/06/1994 | CA2138797A1 Method for delignifying and bleaching a lignocellulose material |
| 01/06/1994 | CA2135900A1 Device for admixing a processing agent to a pulp suspension |
| 01/05/1994 | EP0577396A1 Process for de-inking recycled paper pulp |
| 01/05/1994 | EP0577157A2 Peroxide bleaching process |
| 01/05/1994 | EP0576541A1 High efficiency chlorine dioxide pulp bleaching process |
| 01/05/1994 | EP0576470A1 A method for reducing pitch trouble in mechanical pulp. |
| 01/05/1994 | EP0576454A1 Apparatus for mixing a suspension of cellulosic fibrous material and fluid. |
| 01/05/1994 | CN1080343A Wash press modification for oxygen delignification process |
| 01/04/1994 | US5275024 Paper pulp washing |
| 12/29/1993 | EP0575374A1 Method for bleaching a chemical pulp and application of such method to the bleaching of a kraft pulp |
| 12/29/1993 | CN2151167Y Chlorinating apparatus for paper pulp bleaching |
| 12/28/1993 | US5273625 Ion exchanging by applying calcium cations in an aqueous solution as a spray |
| 12/23/1993 | WO1993025693A1 Recombinant xylanases |
| 12/23/1993 | WO1993025522A1 Process for producing thiourea dioxide and bleaching of papermaking pulp with thiourea dioxide produced thereby |
| 12/23/1993 | CA2138383A1 Recombinant xylanases |
| 12/22/1993 | EP0484342B1 Filter cylinder |
| 12/22/1993 | CN1079789A Manufacture technology of sea-weed fibre |
| 12/21/1993 | US5271672 Apparatus having rotating arms and fluid outlet for treating and discharging a medium |
| 12/21/1993 | CA1325360C Method and apparatus for pumping high consistency pulp |
| 12/21/1993 | CA1325352C Method and apparatus for treating pulp |
| 12/16/1993 | CA2098144A1 Method for improving quality of deinked high grade waste paper |
| 12/15/1993 | EP0573892A1 Reactor system for treating cellulosic pulp |
| 12/15/1993 | EP0573536A1 Xylanase, xylanase-producing bacillus and applications thereof. |
| 12/15/1993 | EP0489104B1 Process for treatment of lignocellulosic pulp |
| 12/15/1993 | CN2149415Y Polyester spiral net belt for hydro-extracting |
| 12/11/1993 | CA2098062A1 Production of cellulose pulp bleaching chemicals |
| 12/09/1993 | WO1993024621A1 Novel enzyme preparations and methods for their production |
| 12/08/1993 | EP0572388A1 Ctmp-process. |
| 12/07/1993 | US5268075 Aqueous suspension of chlorine dioxide |
| 12/07/1993 | CA1324908C Paper-making material deposition apparatus |
| 12/01/1993 | EP0571513A1 Method of microencapsulation of hyperbaric gas. |
| 12/01/1993 | EP0571433A1 Bleaching of lignocellulosic material with activated oxygen. |
| 11/30/1993 | US5266168 Gravity type pulp washer or thickener with rotating disrupters |
| 11/30/1993 | US5266166 Methods for controlling the deposition of organic contaminants in pulp and papermaking processes using a polyalkylene oxide/vinyl acetate graft copolymer |
| 11/30/1993 | US5266160 Environmentally acceptable separation of gases from fiber suspension after bleaching |
| 11/30/1993 | US5266158 Monoperoxysulfuric acid, halide ion |
| 11/30/1993 | US5265447 Drum washer sealing |
| 11/25/1993 | WO1993023608A1 A method of bleaching cellulosic fibre material with ozone |
| 11/25/1993 | WO1993023607A1 A process for bleaching pulp without using chlorine-containing chemicals |
| 11/25/1993 | WO1993023606A1 Process for producing paper or paperboard with increased strength from mechanical pulp |
| 11/25/1993 | CA2118316A1 A process for bleaching pulp without using chlorine-containing chemicals |
| 11/24/1993 | EP0571144A1 Control of deposition of organic contaminants |
| 11/23/1993 | US5264138 Method and apparatus for treating a fiber suspension |
| 11/23/1993 | US5263774 Rotor for increasing mixing efficiency in a medium consistency mixer |
| 11/18/1993 | EP0569555A1 Solid state culture of white rot fungi |
| 11/18/1993 | EP0569526A1 Pulping of lignocellulosic materials and recovery of resultant by-products |
| 11/18/1993 | EP0483170B1 Stabilized aqueous solution of hydrogen peroxide and preparation method |
| 11/16/1993 | US5261875 Method and apparatus for injection of gas hydrates |
| 11/16/1993 | CA1324344C Screen segment for filters for thickening fiber suspensions |
| 11/16/1993 | CA1324283C Acid purification of product from alkaline peroxide processing of nonwoody lignocellulosic substrates |
| 11/16/1993 | CA1324281C Endless wire for pulp thickener |
| 11/11/1993 | WO1993022499A1 Wood-free pulp and white paper product |
| 11/11/1993 | WO1993022028A1 Paper pulp washing apparatus and process |
| 11/11/1993 | CA2133406A1 Wood-free pulp and white paper product |
| 11/10/1993 | EP0569085A1 Pitch or stickies control agent |
| 11/10/1993 | EP0568599A1 Method for avoiding pitch troubles by use of thermostable lipase. |
| 11/10/1993 | CN1078276A Method for prodn. of printing paper pulp made from all cotton stalk by hot mechanical grinding |
| 11/09/1993 | CA1324033C Method and apparatus for pumping high-consistency fiber suspension |
| 11/03/1993 | EP0568229A1 Control of deposition of organic contaminants in pulp and papermaking systems |
| 11/03/1993 | CN1078006A Pulp bleaching reactor and method |
| 11/02/1993 | US5258100 Minimizing gas separation in a mixer outlet |
| 11/02/1993 | CA1323791C Controlling water input to pulp washing system based on measurements on reduced dimension stream |