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 3 - Pulping cellulose-containing materials
Patents for D21C 3 - Pulping cellulose-containing materials (5,020)
12/2003
12/04/2003US20030221805 Improving properties of pulp produced or reducing the digester cycle time in alkaline chemical pulping processes in which an effective amount of at least one selected phosphonate or carboxylate compound or mixtures thereof is admixed with the
12/03/2003EP1366231A2 Method for separating hemicelluloses from a biomass containing hemicelluloses and biomass and hemicelluloses obtained by said method
12/03/2003CN1129680C Process for production of LYOCELL fiber with bamboo material
12/02/2003US6656324 Method for removing wax from a pulp furnish
12/02/2003CA2251956C Method and apparatus for filling a pulp tower
11/2003
11/27/2003WO2003097931A1 A method for the continuous cooking of wood raw material for cellulose pulp
11/27/2003US20030217823 Method for producing pulp and products from high silica content agricultural waste materials
11/27/2003CA2482554A1 Very low cod unbleached pulp
11/26/2003EP1190137B1 Method for separating lignocellulose-containing biomass
11/26/2003EP1068376B1 Compositions for the preparation of lyocell fibers
11/20/2003WO2003095737A1 Method for producing pulp and products from high silica content agricultural waste materials
11/20/2003US20030213569 Very low COD unbleached pulp
11/19/2003EP1362935A1 Lyocell fibers, and compositions for making the same
11/19/2003EP1196641B1 Preparation of chemical pulp and xylose, utilizing a direct acid hydrolysis on the pulp
11/19/2003CN1456745A Chinese alpine rush bamboo calligrphy and painting paper
11/19/2003CN1456744A Chinese alpine rush calligraphy and painting paper
11/19/2003CN1456743A Producing method for Chinese alpine rush calligraphy and painting paper
11/18/2003US6649023 Polyglycoside and polyoxyalkylene glycol
11/13/2003US20030209335 Extraction liquids from cellulose slurry
11/06/2003US20030205343 Continuous digester
11/05/2003EP0896648B1 Hydrogen sulphide pretreatment of lignocellulosic material in continuous pulping processes
11/05/2003CN1454272A Method for preparing pulp from cornstalk
10/2003
10/29/2003EP1356156A2 Heat treatment of polysulphide containing white liquors
10/29/2003CN1451815A Process for high-efficiency clean bio-pulping kenaf bast
10/22/2003CN1450226A Low-cost digesting agent for making paper and use method thereof
10/08/2003EP1180171B1 Method for producing paper pulp, lignins, sugars and acetic acid by fractionation of lignocellulosic vegetable material in formic/acetic acid medium
10/08/2003CN1446977A Enclosed type cycle oxygenolysis pulping method
10/08/2003CN1446955A Method of mfg. Laiosai fiber compsn.
10/08/2003CN1446954A Laiosai fiber
10/08/2003CN1446953A Method of mfg. Laiosai fiber
10/02/2003WO2003080924A1 Method for the modification of cellulose fibres
10/02/2003US20030186055 Reduced bleach stage temperature and chemical dose require-ments
10/02/2003US20030186054 For producing films, fibers, and non-woven webs
10/02/2003US20030186053 Reduce pulp viscosity to very low levels without increasing the copper number of the pulp, reduce the bleach stage temperature and the chemical dose needed in the bleach plant to produce lyocell pulp
10/02/2003US20030183351 Use of thinnings and other low specific gravity wood for lyocell pulps method
10/01/2003CN1445412A Pulping method of non-wood fibers with no black liquor drained off as well as its boiler
09/2003
09/25/2003WO2003078727A1 Method for the feed of cellulose chips during the continuous cooking of cellulose
09/25/2003US20030178164 Method for regulating a process for manufacturing paper pulp by measuring the amount of hexenuronic acid optically
09/24/2003EP1346103A1 Method for alkaline cooking of fiber material
09/24/2003CN1443721A Method for preparing concrete water-reducing agent by utilizing paper-making pulping reaction
09/16/2003US6620292 Cellulose production from lignocellulosic biomass
09/12/2003WO2003074781A1 Process for producing furfural, formic acid and acetic acid from spent pulp-cooking liquor
09/03/2003EP1340814A1 Thermostable xylanases
09/03/2003EP1339913A1 Method for alkaline batch cooking of fiber material
09/03/2003EP1192311B1 Use or a foam-controlling agent
09/03/2003EP1115943B1 Method for precipitating hemicellulose onto fibres for improved yield and beatability
09/02/2003US6613192 Process for producing biokraft pulp from eucalyptus chips
08/2003
08/21/2003US20030157017 Polysulfide measurement methods using colormetric techniques
08/20/2003CN1436893A Naxidongba paper making process
08/20/2003CN1436892A Naxidongba paper making process with papermulberry bark
08/19/2003CA2193169C Method of producing pulp for paper manufacture
08/13/2003CN1435529A Method for preparing high-homogeneous cellulose using overcooled liquid phase N-methylmorpholine-N-oxide hydrate solvent
08/12/2003US6605350 Sawdust alkaline pulp having low average degree of polymerization values and method of producing the same
08/12/2003US6605180 Fiber material and cooking liquor are introduced at top of digester and pulp is discharged from bottom via line in which pulp is maintained at same pressure level to pressurized wash; increased production in overloaded digesters
08/07/2003US20030145963 Gas phase continuous digester having an inverted top separator with liquor injection
08/06/2003CN1434167A Pulping process of straw pulp in papermaking
07/2003
07/31/2003WO2003062525A1 Continuous cooking of cellulose pulp with improved heat economy
07/31/2003WO2003062524A1 Cooking of cellulose pulp in a cooking liquor containing pre-evaporated black liquor
07/30/2003EP1330572A1 A cooking process using hot black liquor
07/30/2003EP0988414B1 Method for continuous cooking in a single-vessel digester
07/30/2003CN1432687A Straw pulping process
07/24/2003WO2003060229A1 Process for continuously cooking chemical cellulose pulp
07/23/2003EP1328679A1 Cellulose production from lignocellulosic biomass
07/23/2003CN1432087A Alkaline pulp having low average degree of polymerization values and method of producing same
07/23/2003CN1115435C Acidifying sulfate pulp-making process
07/22/2003US6596033 Resistant to fibrillation under wet abrasion; low denier; pebbled surface as seen at high magnification and having a variable cross section and diameter along and between fibers
07/17/2003WO2003057980A1 Polysulfide measurement methods using colorimetric techniques
07/17/2003WO2003057979A1 Pretreatment of chips with white liquor prior to a treatment with black liquor
07/17/2003US20030131956 Well suited for modifying existing pulp digesters without the need for incorporating additional liquor extraction screens.
07/17/2003CA2473507A1 Polysulfide measurement methods using colorimetric techniques
07/16/2003EP1036236B1 Pulp production method
07/16/2003CA2414070A1 Continuous pulping processes and systems
07/09/2003CN1114014C Method for raising paper pulp yield and its device
07/02/2003CN1427116A Chemical agent substitute of alkaline pulping in papermaking technology
07/01/2003US6585880 Method for recovering chemicals in a process of producing pulp by kraft process
06/2003
06/24/2003US6582554 Continuous digester having a sectioned top separator with multiple liquor extraction ports
06/19/2003US20030111194 Oxidation analysis without the precipitation of manganese dioxide; papermaking
06/18/2003CN1425090A Method for obtaining/recuperating by extraction carboxylic acids from waste liquors derived from pulp production
06/18/2003CN1424459A Preparation of cellulose and lignin by high boiling alcohol solvent
06/12/2003WO2003048454A2 Papermaking process using enzyme-treated sludge, and products
06/11/2003CN1423012A Pulp-making method of raising fiber-recovering quality
06/11/2003CN1423011A Pollution-free pulping process and apparatus
06/10/2003US6576084 Method of pretreating pulp with yield or strength-enhancing additive
06/10/2003CA2156175C Straining device
06/05/2003US20030102095 Paper sizing
06/05/2003US20030102093 Processes and systems for handling knots in a chemical pulping process
06/05/2003US20030102092 Processes and systems for handling knots in a chemical pulping process
06/04/2003EP1005586B1 Method for the recovery of formic acid
06/04/2003CN1421570A Enzymatic straw material pulping process
06/04/2003CN1110602C Paper pulp tower and its filling method
06/04/2003CN1110601C Method of making pulp using single-step cooking with formic acid and washing with formic acid containing performic acid
06/04/2003CA2413386A1 Processes and systems for handling knots in a chemical pulping process
05/2003
05/28/2003EP0787231B1 Polyoxometalate delignification and bleaching
05/28/2003CN2552996Y Straw pulp drying-separating machine
05/28/2003CN1420229A Pulping Process for papermaking straw pulp
05/27/2003US6569289 Cellulose slurry treating systems for adding AQ to a cellulose slurry in the substantial absence of alkali
05/27/2003CA2187461C Composition for producing paper and process
05/22/2003US20030096394 Laccase activity enhancers
05/21/2003EP1311717A2 Alkaline pulp having low average degree of polymerization values and method of producing the same
05/21/2003EP0928349B1 Sulphur-free process for producing chemical pulp
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