Patents
Sitemap › D21 - Paper-making; Production of cellulose › D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materials; Regeneration of pulping liquors; Apparatus therefor › D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters
Patents for D21C 9 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters (10,265)
10/1995
10/05/1995CA2187370A1 Polyoxometalate delignification and bleaching
10/04/1995EP0674731A1 Method and apparatus for regulating wood pulp bleaching
10/04/1995EP0674730A1 Pulp and bleaching reagent mixer and method
10/04/1995EP0674729A1 Improved pulp bleaching apparatus and method
10/03/1995US5454909 Low-density hot melt adhesive
10/03/1995US5454907 Method of refining woodchips or beating wood pulp with a selectively sulfonated chitosan
09/1995
09/28/1995WO1995025844A1 Heat treated high lignin content cellulosic fibers
09/28/1995WO1995025837A1 Preparing individualized polycarboxylic acid crosslinked cellulosic fibers
09/28/1995DE19510278A1 Bleaching agent, useful esp. for recycled waste paper pulp prodn.
09/27/1995EP0705361A4 Gas phase delignification of lignocellulosic material
09/27/1995EP0673454A1 Apparatus for filtering suspensions
09/27/1995EP0513140B1 A process for the bleaching of chemical pulp
09/27/1995CA2145439A1 Process and agent for the oxidative bleaching of wood pulp and for deinking waste paper
09/20/1995EP0672210A1 Method for controlling an ozone bleaching process
09/20/1995EP0672209A1 Method and apparatus for bleaching pulp
09/20/1995EP0672208A1 Method of bleaching pulp without using chlorine-containing chemicals
09/20/1995EP0672126A1 Stabilized aqueous solutions of lipases
09/20/1995EP0671972A1 Control of pressurized ozone flow to a pulp delignification reactor
09/20/1995CN1108713A Two-purpose machine for steaming and washing paper pulp
09/19/1995US5451296 Two stage pulp bleaching reactor
09/17/1995CA2144825A1 Method of bleaching cellulose pulp
09/17/1995CA2144677A1 Method of tcf or ecf bleaching of cellulose pulp
09/14/1995WO1995024527A1 Method and apparatus for treating solid, fluid or gaseous material of combinations thereof, especially pulp suspensions, on a screen or filter surface
09/13/1995EP0671507A2 Cationic and anionic polyelectrolytes for enhancing the freeness of paper pulp
09/13/1995EP0671503A2 Apparatus and method for dehumidifying products in pulp form by intensive evaporation
09/13/1995EP0670929A1 Process for bleaching of lignocellulose-containing pulp.
09/13/1995EP0670928A1 Process for delignification of lignocellulose-containing pulp.
09/13/1995EP0670927A1 Method and pulp washing machine for washing of pulp or similar material
09/13/1995EP0670926A1 Papermaking process.
09/13/1995EP0670924A1 Method of continuously cooking pulp.
09/13/1995EP0670893A1 Novel enzyme preparations and methods for their production
09/13/1995EP0464157B1 Ozone treatment of chlorine dioxide/chlorine chlorinated pulp
09/12/1995US5449436 Sulfite, sodium borohydride, hydrogen peroxide
09/08/1995WO1995023892A1 Method in association with the ozone bleaching of sulfite pulp
09/08/1995WO1995023891A1 Impact of temperature and alkali charge on pulp brightness
09/06/1995EP0669999A1 Method of bleaching pulp
09/06/1995CN1029665C Screen with surface having projections or depressions
09/05/1995US5447603 Chelation of metal ions in papermaking water with mixed metal hydroxide
09/05/1995US5447602 Process for repulping wet-strength paper
08/1995
08/31/1995WO1995023257A1 Recycling of knots in a continuous process for cooking chemical pulp
08/30/1995EP0591264B1 Ozone bleaching process
08/30/1995EP0587822B1 Process for bleaching and delignifying chemical paper pulp
08/30/1995EP0519061B1 Split alkali addition for high consistency oxygen delignification
08/30/1995CN1107530A 改进的臭氧漂白 Improved ozone bleaching
08/29/1995US5444884 Controlling screen backflush and wash distribution in a pressure diffuser
08/22/1995US5443634 Method for reducing thermal and light-induced brightness reversion in lignin-containing pulps
08/15/1995US5441603 Method for chelation of pulp prior to ozone delignification
08/10/1995WO1995021292A1 Method and apparatus for treating recycled pulp
08/10/1995WO1995021290A1 Pulp bleaching
08/10/1995WO1995021289A1 Screen drum
08/10/1995WO1995021288A1 Apparatus for washing of pulp
08/10/1995WO1995021016A1 Apparatus for mixing a first fluid into a second fluid
08/10/1995DE4400954A1 Wood pulp bleaching with hydrogen peroxide for increased bleaching
08/10/1995CA2182373A1 Apparatus for mixing a first fluid into a second fluid
08/09/1995EP0665912A1 Improved ozone bleaching
08/09/1995EP0651832A4 Process for gas phase delignifying wood pulp.
08/09/1995EP0466753B1 A process and apparatus for continuous filtering and liquid displacement of a liquid suspension of a fibrous or finely-divided material
08/08/1995US5439555 Minimum adverse environmental pulp with feed to chlorate manufacture
08/03/1995WO1995006095A3 Phenolic complexing agents
08/01/1995US5437992 Five thermostable xylanases from microtetraspora flexuosa for use in delignification and/or bleaching of pulp
08/01/1995US5437418 Apparatus for crosslinking individualized cellulose fibers
08/01/1995US5437170 Washing apparatus
07/1995
07/27/1995WO1995020067A1 Diffuser
07/27/1995WO1995020066A1 Cold caustic extraction of pulps for absorbent products
07/26/1995EP0664150A1 Method and apparatus for mixing gaseous chemical to fibre suspension
07/26/1995EP0663949A1 New xylanases having high activity and stability at alkaline conditions and high temperatures
07/19/1995EP0663030A1 Improved bleaching of high consistency lignocellulosic pulp
07/18/1995US5433858 Treatment of hazardous waste water
07/18/1995US5433824 Antideposit agents
07/12/1995EP0662170A1 Liquid removal apparatus and method for wood pulp
07/12/1995EP0583319B1 Lipase-catalyzed ester hydrolysis
07/11/1995US5431820 Method for treating liquid waste after pulp bleaching
07/11/1995US5431781 Process for the delignification of a chemical paper pulp with organic peroxy acid
07/06/1995WO1995018219A1 Alkali-tolerant xylanases
07/05/1995EP0661403A1 Method of inactivating catalase enzyme
07/05/1995EP0660895A1 Method of producing a mixed peracid oxidizing solution and methods for treating substrates therewith
07/04/1995US5429717 Method of washing of alkaline pulp by adding carbon dioxide to the pulp
07/04/1995US5429716 Newsprint, sodium bisulfite and sodium borohydride
06/1995
06/30/1995CA2139145A1 Method of inactivating catalase enzyme
06/29/1995WO1995017546A1 Inhibition of hydrogen peroxide decomposing enzymes, e.g. catalase and peroxidase during bleaching of cellulose fibers
06/28/1995EP0659222A1 Oxidative bleaching of wood pulp by vanadium-substituted polyoxometalates
06/28/1995CN1104274A Improved bleaching of high consistency lignocellulosic pulp
06/27/1995US5427651 Method for producing bleached sulfate pulp having a long fiber fraction and a short fiber fraction
06/22/1995WO1995016818A1 Method for the manufacture of bleached cellulose pulp
06/22/1995WO1995016431A1 Cosmetic
06/22/1995CA2178509A1 Method for the manufacture of bleached cellulose pulp
06/22/1995CA2155181A1 Cosmetic
06/20/1995US5426043 Cloning and expression of acetyl xylan esterases from fungal origin
06/14/1995EP0656966A1 Method of treating process water.
06/14/1995EP0363379B1 Porphyrins, their syntheses and uses thereof
06/14/1995CN1103685A High-concentration de-inking method for waste paper
06/13/1995US5423946 Adding cellulolytic enzyme and water soluble cationic polymer and water soluble anionic polymer
06/08/1995DE4435631A1 Manganese exclusion from process water in paper or cellulose industry
06/07/1995EP0515502B1 Apparatus for filtering liquids
06/06/1995US5421176 Drum washer
06/01/1995WO1995014810A1 Method and device for feeding out fibre pulp
06/01/1995WO1995014808A1 Use of nitrogen-containing complexing agents in the bleaching of wood pulp
05/1995
05/31/1995CN1103124A Bamboo material fibre fluff pulp and making method
05/26/1995WO1995013843A1 Method and apparatus for delivering oxygen into blood
05/26/1995CA2176601A1 Method and apparatus for delivering oxygen into blood
1 ... 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 ... 103