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)
07/1982
07/20/1982CA1127898A1 Means for washing cellulose pulp
07/13/1982US4339206 Mixing apparatus for mixing a fluid fiber suspension with a treatment fluid suspension
07/07/1982EP0055701A1 A method of controlling a pressure-tight vessel for treating cellulosic pulp
07/06/1982US4338158 Pulping in the presence of a protector
06/1982
06/29/1982US4337060 Cellulose, hydrogen peroxide, potassium orthosilicate
06/29/1982CA1126691A1 Monitor assembly for electrochemical corrosion protection of stainless steel bleach plant washers
06/22/1982CA1125955A1 Use of thiourea dioxide in pulp bleaching processes to preserve pulp strength and aid in brightness
06/15/1982US4334957 Microbicidal compositions for industrial use
05/1982
05/26/1982EP0052382A1 Diffuser arrangements
05/25/1982US4331534 Method of and arrangement for the de-inking of pulp suspensions
05/25/1982CA1124015A1 Diffuser oxygen bleaching
05/12/1982EP0051230A1 Suspensions containing microfibrillated cullulose, and process for their preparation
05/11/1982CA1123249A1 Reducing chemical transfer between treatment stages
05/04/1982CA1122756A1 Oxygen delignification of wood pulp
04/1982
04/27/1982CA1122540A1 Device at rotary filter
04/27/1982CA1122358A1 Process for the full bleaching of pulp
04/20/1982US4325783 Bleaching procedure using chlorine dioxide and chlorine solutions
04/20/1982CA1122001A1 Method for drying chemical or semi-chemical pulp
04/13/1982US4324116 Twin belt vacuum washer
04/13/1982CA1121638A1 Diffuser arrangements
04/06/1982CA1121110A1 Low-consistency ozone delignification
04/01/1982WO1982001019A1 Process to produce pulps
03/1982
03/30/1982CA1120662A1 Procedure and apparatus for cellulose washing
03/30/1982CA1120660A1 Bleaching sequence
03/30/1982CA1120659A1 Degassing of pulp
03/23/1982CA1120408A1 Apparatus for clarifying waste water
03/23/1982CA1120211A1 Process for the inhibition of the formation of deposits in cellulose pulping and cellulose pulp treating processes
03/23/1982CA1120210A1 Bleaching of pulp
03/17/1982EP0047656A1 Process and apparatus for the oxygen delignification of pulp
03/09/1982CA1119360A1 Method for bleaching oxygen delignified cellulose-containing pulp with ozone
02/1982
02/16/1982CA1118161A1 Method for treatment of lignocellulosic material with chlorine
02/16/1982CA1118160A1 Method of oxygen delignification of digested fibre pulp
01/1982
01/19/1982US4311553 Method for use in the defibration or refining of lignocellulose-containing fibrous materials
01/12/1982US4310384 Pulp fibers
12/1981
12/29/1981CA1115005A1 Process for the chemical refining of cellulose pulp
12/23/1981EP0042234A1 Lumen-loaded paper pulp, its production and use
12/22/1981CA1114664A1 Stock washer
12/22/1981CA1114561A1 Method and apparatus for continuous oxygen bleaching of cellulosic pulp
12/15/1981CA1114213A1 Thickener assembly and the like for vapour phase oxygen technology
12/08/1981US4304050 Method for drying chemical or semichemical wood pulp
12/01/1981US4303471 Method of producing fluffed pulp
12/01/1981US4303470 Method and apparatus for mixing gases with a wood pulp slurry
12/01/1981CA1113205A1 System and method for gas phase pulp bleaching
11/1981
11/24/1981US4302488 Impregnating waste paper particles with a solution of fireproofing and/or pesticidal agents
11/24/1981US4302345 Insulation material
11/24/1981CA1113019A1 Barometric leg for rotary vacuum filter
11/24/1981CA1112816A1 Method of producing peroxide bleached pulp
11/24/1981CA1112813A1 Method for extracting ozone-treated fibrous materials
11/17/1981CA1112494A1 Pulping machine and process
11/10/1981US4299653 Method of bleaching pulp with an aqueous solution of chlorine dioxide and chlorine followed by a chlorine solution
11/03/1981US4298428 Use of additives in pulp bleaching processes to preserve pulp strength
11/03/1981US4298427 Method and apparatus for intimately mixing oxygen and pulp while using an alkali to extract bleaching by-products
11/03/1981US4298426 Method and apparatus for treating pulp with oxygen in a multi-stage bleaching sequence
11/03/1981CA1111607A1 Pulping procedure
10/1981
10/27/1981US4297164 Process for displacement washing of porous media
10/27/1981CA1111297A1 Twin belt vacuum washer
10/20/1981US4295932 Synergistic blend of biocides
10/20/1981US4295928 Sodium or calcium hypochlorite, hydroquinone or thymol
10/20/1981US4295927 Method and apparatus for treating pulp with oxygen and storing the treated pulp
10/20/1981US4295926 Method and apparatus for treating pulp with oxygen
10/20/1981US4295925 Treating pulp with oxygen
10/13/1981US4294654 Delignification and bleaching of lignocellulosic pulp via photo-oxygenation
10/13/1981US4294653 Digestion, delignification, defibering
10/06/1981US4293559 Slime control compositions and methods of using the same
10/06/1981CA1110018A1 Delignification and bleaching process and solution for lignocellulosic pulp with peroxide in the presence of metal additives
09/1981
09/29/1981US4292123 Procedure and apparatus for cellulose washing
09/22/1981US4290846 Applying 3,5-dibromo-4-chlorophenol, 3,5-dichloro-4-bromophenol
09/15/1981US4289581 4,5-dichloro-1,2-dithiol-3-one, nonionic surfactants, hydrophilic solvents; papermaking
09/02/1981EP0034856A1 Process for inhibiting corrosion of apparatuses made of titanium
09/02/1981EP0034684A1 1,3-Diformyloxy-2-bromo-2-nitropropane, its preparation and use in anti-microbial applications
08/1981
08/26/1981EP0034219A1 Process for bleaching cellulose pulps by means of organic peracids
08/25/1981US4285765 Water treatment
08/11/1981US4283251 Gaseous ozone bleaching followed by alkaline treatment
08/05/1981EP0032928A1 Process for the preparation of fibers
08/04/1981US4282101 Filtering apparatus
07/1981
07/28/1981CA1105656A1 No translation available
07/21/1981US4279694 Method for treating refined mechanical pulp and thermo mechanical pulp with ozone
07/21/1981CA1105205A1 Simplified bleaching process
07/14/1981US4278496 Method for bleaching pulp with ozone
07/07/1981CA1104403A1 Process and apparatus for washing fibre stock in the de-inking of paper
06/1981
06/30/1981US4276169 Drainage deck assembly for rotary vacuum drum filter
06/30/1981US4276167 Washer and/or thickener
06/23/1981US4274912 Whitening, pollution control
06/23/1981CA1103504A1 Oxygen reactor systems pulp reject treatment
06/23/1981CA1103413A1 Process for the manufacture of mechanical pulp
06/23/1981CA1103412A1 Kraft mill recycle process
06/23/1981CA1103409A1 Method of bleaching chemical pulp in multiple stages
06/16/1981US4273612 Process and apparatus for continuously washing aqueous fibrous suspensions and controlling the volume of wash liquid
06/16/1981CA1102969A1 Method of treating lignocellulosic or cellulosic pulp to promote the kinking of pulp fibres and/or to improve paper tear strength
06/10/1981EP0030158A1 Apparatus and process for medium consistency oxygen delignification of pulp
06/09/1981CA1102604A1 Method and an apparatus for treating fibre suspensions
06/02/1981US4270976 Defibration in grinding space between rotating disks in pressurized steam
06/02/1981CA1102206A1 Microbicidal compositions for industrial use
05/1981
05/27/1981EP0029076A1 Method of controlling deposition in aqueous systems
05/26/1981US4269656 Wood pulp forming system and method of recovering spent chemicals
05/26/1981CA1101786A1 Thickener apparatus including a shaftless cylinder mold
05/19/1981US4268350 Method of treating pulp bleaching effluents
05/12/1981US4266413 Means for washing cellulose pulp
05/05/1981CA1100416A1 Continuous oscillation of liquid separator
04/1981
04/22/1981EP0027369A1 Stable precursor solution for the generation of hydrosulfite and use thereof in bleaching wood pulp, brightening kaolin clay and reducing vat dyestuffs to their leuco form
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