| Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265) |
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| 06/23/1994 | WO1994013879A1 Method and apparatus for bleaching pulp |
| 06/23/1994 | WO1994013393A1 Control of pressurized ozone flow to a pulp delignification reactor |
| 06/23/1994 | CA2149404A1 Control of pressurized ozone flow to a pulp delignification reactor |
| 06/22/1994 | CN2169646Y Rotary mixer for liquid and chloride gas |
| 06/22/1994 | CN1088277A Process for making highly finished kraft paper |
| 06/21/1994 | US5322647 Oxygen bleaching of cotton linters by disproportionation of hydrogen peroxide |
| 06/15/1994 | CN1087960A Centrifugal reversely-flushing pulp washing engine |
| 06/15/1994 | CA2111261A1 Elimination of sulfur dioxide formation in refiner bleaching |
| 06/14/1994 | US5320757 Method of inhibiting calcium oxalate scale deposition |
| 06/14/1994 | US5319902 Mass tower and method of making the same |
| 06/14/1994 | CA1330174C Method and apparatus for thickening fiber suspension |
| 06/09/1994 | WO1994012722A1 Process for bleaching of lignocellulose-containing pulp |
| 06/09/1994 | WO1994012721A1 Process for delignification of lignocellulose-containing pulp |
| 06/09/1994 | WO1994012720A1 Method of bleaching pulp without using chlorine-containing chemicals |
| 06/09/1994 | WO1994012621A1 Enhancement of enzyme reactions |
| 06/09/1994 | DE4241040A1 Appts. for suspension water removal - has rotating sieve cylinder within suspension chamber with first fourdrinier passing round its lower section |
| 06/09/1994 | CA2150562A1 Enhancement of enzyme reactions |
| 06/08/1994 | EP0527808B1 Bleaching of chemical pulp |
| 06/08/1994 | EP0464110B1 Bleaching process for the production of high bright pulps |
| 06/01/1994 | EP0599440A1 Pitch reduction on paper machine surfaces |
| 05/31/1994 | US5316675 Rotatable annular hollow disc for filtering liquids |
| 05/28/1994 | CA2109749A1 Method of controlling biotechnological pulp and paper processing using noble gases |
| 05/26/1994 | WO1994011570A1 Method for controlling an ozone bleaching process |
| 05/26/1994 | WO1994011569A1 A method in delignifying and/or bleaching of cellulose pulp |
| 05/26/1994 | WO1994011568A1 Method of bleaching pulp |
| 05/26/1994 | WO1994011567A1 Method of continuously cooking pulp |
| 05/26/1994 | CA2149524A1 Method of continuously cooking pulp |
| 05/26/1994 | CA2149332A1 Method of bleaching pulp |
| 05/26/1994 | CA2148614A1 Method for controlling an ozone bleaching process |
| 05/26/1994 | CA2109866A1 Pitch reduction on paper machine surfaces |
| 05/24/1994 | US5314583 Process for the comminution of materials and plant for carrying out the process |
| 05/24/1994 | US5314582 Cellulosic fiber of improved wettability |
| 05/11/1994 | WO1994010378A1 Bleaching method for alkaline sulphate pulp |
| 05/11/1994 | WO1994010377A1 Improved ozone bleaching |
| 05/11/1994 | WO1994010376A1 Low temperature bleaching |
| 05/11/1994 | WO1994010375A1 Displacement chelate treatment of pulp |
| 05/11/1994 | WO1994010374A1 Method for peroxide bleaching of sulphate pulp |
| 05/11/1994 | WO1994010373A1 Method and pulp washing machine for washing of pulp or similar material |
| 05/11/1994 | EP0515362B1 Bleaching of lignocellulosic material with dioxiranes |
| 05/11/1994 | CA2147244A1 Improved ozone bleaching |
| 05/10/1994 | US5310460 Adding water soluble cationic polymer to wash water to react with lignin solution present in large channels; efficiency |
| 05/10/1994 | US5310458 Complexing trace metals with nitrogenous polycarboxylic acid and removal by washing |
| 05/04/1994 | EP0595674A1 Process for pH and fire control in pulp balers |
| 05/04/1994 | EP0595386A1 Process for bleaching of lignocellulose-containing pulp |
| 05/04/1994 | EP0489738B1 Method and apparatus for treating fiber suspension |
| 05/03/1994 | US5308449 Method for treating a paper pulp with an enzyme solution |
| 04/30/1994 | CA2109179A1 Process for bleaching of lignocellulose-containing pulp |
| 04/29/1994 | CA2081387A1 Variable stage pressure diffuser |
| 04/26/1994 | US5306391 Measuring pulp temperature after steam addition, calculating pulp flow rate by heat balance, adjusting chemical flow rate to maintain consistency |
| 04/26/1994 | CA1328714C Peroxide bleaching of mechanical pulps |
| 04/20/1994 | CN2162478Y Centrifugal recoil washing machine for paper pulp |
| 04/20/1994 | CN1085618A Device for admixing a processing agent to a pulp suspension |
| 04/20/1994 | CA2108311A1 Process for ph and fire control in pulp balers |
| 04/19/1994 | CA1328546C Process for controlling pitch deposits in the pulp and papermaking processes |
| 04/14/1994 | WO1994008088A1 New method of liquor removal from particulate solids |
| 04/14/1994 | WO1994008087A1 Improved bleaching of high consistency lignocellulosic pulp |
| 04/14/1994 | CA2146241A1 New method of liquor removal from particulate solids |
| 04/14/1994 | CA2144433A1 Improved bleaching of high consistency lignocellulosic pulp |
| 04/12/1994 | US5302248 Delignification of wood pulp by vanadium-substituted polyoxometalates |
| 04/12/1994 | US5302244 Oxygen delignification of waste cellulosic paper products |
| 04/05/1994 | US5300194 Pitch control |
| 04/05/1994 | US5300191 Concentrating liquid effluents, incinerating to produce ash, chemically reacting to produce chlorate, reacting to form chlorine dioxide |
| 04/05/1994 | CA1328185C Method and means for facilitating the discharge of a drop leg or the like and treating pulp in said space |
| 03/31/1994 | WO1994006964A1 Method of producing a mixed peracid oxidizing solution and methods for treating substrates therewith |
| 03/31/1994 | CA2141807A1 Method of producing a mixed peracid oxidizing solution and methods for treating substrates therewith |
| 03/29/1994 | US5298118 Preparation of bleached chemithermomechanical pulp |
| 03/23/1994 | EP0588767A1 Process for improving the brightness, the clearness and the colour of wooden fibrous material |
| 03/23/1994 | EP0588704A2 Recovery of oxygen-rich gas from ozone bleaching processes |
| 03/23/1994 | EP0587822A1 Process for bleaching and delignifying chemical paper pulp. |
| 03/22/1994 | US5296152 Apparatus for filtering suspensions and a method of operating the apparatus |
| 03/22/1994 | US5296143 Apparatus for filtering liquids |
| 03/22/1994 | US5296100 Precomplexing of metal impurities |
| 03/22/1994 | US5296099 Pulping, washing, partially delignifying with oxygen, further delignifying with ozone, adding aqueous alkaline solution, extracting lignin, washing, bleaching with chlorine dioxide, recycling wash water |
| 03/22/1994 | US5296098 Method and device for separating a fibre suspension |
| 03/22/1994 | US5296097 Method for reducing contaminants in pulp prior to ozone bleaching |
| 03/17/1994 | WO1994005851A1 Novel method of bleaching of lignocellulosic pulp using persulphate |
| 03/17/1994 | WO1994005850A1 Method of treating process water |
| 03/17/1994 | WO1994005849A1 Oxidative bleaching of wood pulp by vanadium-substituted polyoxometalates |
| 03/17/1994 | CA2143824A1 Oxidative bleaching of wood pulp by vanadium-substituted polyoxometalates |
| 03/17/1994 | CA2139566A1 Method of treating process water |
| 03/16/1994 | EP0587270A1 Method of bleaching paper pulp |
| 03/16/1994 | EP0586755A1 A process for controlling the deposition of pitch in paper making |
| 03/16/1994 | CN1083882A Delignification of non-woody biomass |
| 03/15/1994 | CA2105922A1 Process for enhancing the whiteness, brightness and chromaticity of paper making fibres |
| 03/15/1994 | CA2062957C Method and apparatus for treating fibre suspension |
| 03/10/1994 | CA2080026A1 Novel method of bleaching of lignocelulosic pulp using persulphate |
| 03/09/1994 | CN1083555A Cleaning mixture distributing device for washing equipment |
| 03/08/1994 | US5292403 Detackifying composition of anionic polymer and cationic surfactant |
| 03/03/1994 | WO1994004746A1 Dewatering arrangement |
| 03/03/1994 | WO1994004664A1 New xylanases having high activity and stability at alkaline conditions and high temperatures |
| 03/03/1994 | WO1994002549A1 LOWERING THE pH OF TEXTILE PROCESSING SOLUTION WITH AN ACID/BASE SALT AS A pH ADJUSTING AGENT |
| 03/03/1994 | CA2142818A1 New xylanases having high activity and stability at alkaline conditions and high temperatures |
| 03/02/1994 | EP0584513A1 Pitch control treatment |
| 03/02/1994 | EP0584176A1 Process, using enhanced-action laccase enzymes, for the delignification or bleaching of lignocellulose-containing material or for the treatment of waste water |
| 02/23/1994 | EP0583319A1 Lipase-catalyzed ester hydrolysis. |
| 02/23/1994 | EP0583310A1 Use of cellulase for pulp treatment. |
| 02/22/1994 | CA1327102C Process for bleaching cellulose pulp or a fraction thereof, a plant for use in carrying out said process, and a screw press, especially for use with said process and plant, resp. |
| 02/17/1994 | WO1994003673A1 Zero discharge pulp mill |
| 02/17/1994 | WO1994003592A1 Stabilized aqueous solutions of lipases |
| 02/17/1994 | CA2139842A1 Zero discharge pulp mill |