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Patent Searching and Data


Matches 451 - 500 out of 2,186

Document Document Title
WO/2000/005310A1
A process and materials are described in which highly refined cellulose fibers are broken down into microfibers and further processed into compositions, films, coatings and solid materials which are biodegradable and even edible. The pro...  
WO/2000/003083A1
The invention relates to a process for enhancing the concentration of the fibre derived dissolved and colloidal substances in process water that comes from mechanical pulping. According to the invention, process water is treated with enz...  
WO/1999/063152A1
Method and improving causticizing efficiency in the conventional lime recausticization portion of alkaline pulping processes, such as are commonly used in the pulping and bleaching of wood and non-wood cellulose fiber materials. An aqueo...  
WO/1999/063149A1
Disclosed is a method for delignifying lignocellulosic materials by first treating the material with an alkaline solution in the presence or absence of anthraquinone, and then exposing the material to a polyoxometalate. Inclusion of the ...  
WO/1999/063151A1
A method is provided for the use of borates in the recausticization of alkali-containing liquors such as those produced in the chemical and semi-chemical pulping of wood and in the oxidation and bleaching of wood pulp. Sodium hydroxide i...  
WO/1999/057364A1
The invention relates to a process based on formic acid cooking for producing pulp from herbaceous plants and deciduous trees by using acetic acid as an additional cooking chemical. The obtained pulp can be used in fine paper and board p...  
WO/1999/047248A1
Methods for controlling wax and other contaminants by improving the dispersion of these materials through the addition of contaminant dispersants to the process of recycling paper and paperboard are disclosed. A preferred contaminant dis...  
WO/1999/047733A1
The present invention provides compositions, useful for making lyocell fibers, having a high hemicellulose content, a low lignin content and including cellulose that has a low average degree of polymerization (D.P.). Further, the present...  
WO/1999/047250A1
The invention relates to a method for the treatment of solids with liquefied gases, especially liquefied ammonia, under pressure. According to said method the solid to be treated is placed into a pressurized reactor (10) at ambient press...  
WO/1999/045191A1
Chemical cellulose pulp (e.g. kraft pulp) is produced with enhanced strength and/or yield using a strength or yield enhancing additive such as polysulfide or anthraquinone or its equivalents or derivatives, and in a manner that allows ef...  
WO/1999/042652A1
The specification discloses a process for production of chemical fibrous pulp for making paper, paperboard and other fibrous products from herbaceous plants, such as kenaf. Pulp from the herbaceous plant is made by a process which involv...  
WO/1999/042651A1
A method for removing wax from a pulp furnish is disclosed. The method is effective for removing wax from a pulp furnish containing waxed old corrugated containers (OCC). In the method, the pulp furnish containing waxed OCC is treated wi...  
WO/1999/041448A1
A process for producing a pulp suitable for papermaking from a nonwood fiber source material is described. Exemplary nonwood fiber source materials include kenaf and industrial hemp. The process includes the steps of washing the nonwood ...  
WO/1999/040252A1
Enhanced removal of lignin and other extractives in a pulping process is achieved by contacting wood chips and the like with a liquid mixture comprised of white liquor and aminoalkoxylsilane and optionally, one or more nonionic and/or an...  
WO/1999/037834A1
A process for the production of elementary vegetable bast fibres is provided, which process comprises the steps of a) cutting raw vegetable bast fibres to a fibre length of 1 to 400 mm, b) chemically treating the cut fibres to remove lig...  
WO/1999/031315A1
A method for separating cellulosic components from, and determining cellulosic component content of, plant material. Plant material and an electromagnetic active solvent, e.g. ethanol, are heated by means of electromagnetic radiation (e....  
WO/1999/022063A1
The invention is related to the technological production of cellulose by cooking raw plant material - wood by the variable parameter of amount of chemical reagent in the liquor. The process of cooking is carned out with B-constant based ...  
WO/1999/020830A1
The invention concerns chemical paper pulp production method which comprises a continuous cooking process which consists in: treating, in an impregnation zone (a), wood chips with a first alkaline liquor; treating the resulting wood chip...  
WO/1999/020829A1
The invention concerns a method for making chemical paper pulp comprising a batch cooking process including the following steps: (1) treating wood chips using an alkaline solution in a batch reactor (a) so as to transform at least part o...  
WO/1999/020828A1
An improved method for acid sulfite pulping of wood chips in which wood chips are digested in an acid sulfite pulping liquor to produce a wood pulp is disclosed, which improvement includes adding to the chips, prior to mixing with the ac...  
WO/1999/018285A1
The present invention provides a method for pre-processing and processing straw pulp and forming a byproduct suitable for animal consumption. The present invention also provides a paper product comprising straw pulp. According to the pre...  
WO/1999/014423A1
The invention relates to a process for producing pulp from cellulosic fiber material with improved polysulfide regeneration alone or in combination with polysulfide cooking. The cellulosic fiber material is impregnated with polysulfide b...  
WO/1999/014424A1
Apparatus for production of pulp from plant material comprising, in sequence, a first feeder (9) for regulating the input of raw material, a boiler (11) for cooking the material to generate pulp, a second feeder (13) maintained at lower ...  
WO/1999/010384A1
The invention relates to a raw material for use in the preparation of pectin and related compounds, the raw material being pressed, stabilized sugar beet pulp subjected to biotechnical pre-treatment. In accordance with the invention the ...  
WO/1999/010595A1
The invention relates to a method for removing chemically bound formic acid from a material containing the same, in the presence of free formic acid. The method is characterized in that chemically bound formic acid is allowed to react to...  
WO/1999/009243A1
A method and device for cooking pulp by increasing the effective alkali concentration in the residual phase of the cooking process to substantially improve the residual delignification rate and thus improving the pulp properties such as ...  
WO/1999/009244A1
The present invention claims a new method to depolymerize and/or modify lignin or lignin related compounds by using copper, a copper coordination compound and peroxide in an aqueous solution. The copper coordination compound is applied i...  
WO/1999/007936A1
A method of treating wood chips allows chemical pulp (e.g. kraft pulp) to be produced having enhanced fiber strength properties. In a first zone or stage the chips are cool impregnated (e.g. at a temperature of about 60-120 °C) with a f...  
WO/1998/059107A1
A method in connection with the pretreatment of comminuted fibrous material intended for chemical cellulose pulp production, wherein said comminuted fibrous material is fed through a low pressure system comprising a gas phase part follow...  
WO/1998/058119A1
The invention concerns a method for the continuous preparation of paper pulp from a raw material consisting of lignocellulose textile fibres, consisting in cutting the textile fibres, separating the textile fibres from foreign bodies, ca...  
WO/1998/056979A1
A method for continuous cooking of kraft pulp in a single-vessel system (1), with chips and liquor being conveyed from a high-pressure feeder (2) in a transfer line (2A) to a first end (3) of the digester (1), a part of said liquor being...  
WO/1998/056978A1
A method for use in a batch digesting process is provided which includes the removal (76, 92) of a portion of the hot cooking liquor from the digester (10) prior to the cook creating a liquid-vapor interface (90) in the digester followed...  
WO/1998/056981A1
Disclosed are modified cellulosic fibers having a dry zero span tensile index that is substantially less than the dry zero span tensile index of the corresponding unmodified cellulosic fibers. Fibers having reduced dry zero span tensile ...  
WO/1998/056980A1
An apparatus and method for use in a displacement batch digesting process is provided which reduces the amount of equipment required to carry out an efficient displacement batch digestion process. According to the invention, at least one...  
WO/1998/049390A1
The present innovation consists of the use of a reagent solution (FINAL COOKING ACID) where ammonium magnesium bisulphite is the active chemical. This new process is particularly useful to those industrial plants where the cellulose pulp...  
WO/1998/036124A1
A process for treating a cellulose-containing substance (20) includes bringing the cellulose-containing material (20), in particulate form, into contact with an aqueous liquid (19), and thereafter subjecting the cellulose-containing subs...  
WO/1998/035090A1
This invention relates to a new and improved way of continuously cooking fibre material, wherein temperatures and alkaline levels are controlled to be maintained within specific levels in different zones of the digesting process in order...  
WO/1998/035091A1
This invention relates to a new and improved way of continuously cooking fibre material, wherein temperatures and alkaline levels are controlled to be maintained within specific levels in different zones of the digesting process in order...  
WO/1998/033970A1
A process is disclosed for producing fibrous materials for the manufacture of cellulose, paper or wood materials by using at least one dicarboxylic acid dialkyl ester and/or a copolymer of polyester-polyether and/or fatty acid polyol mon...  
WO/1998/032912A1
The present invention relates to a method and apparatus for cooking pulp. Especially, preferably, the invention relates to an alkaline batch cooking process, i.e. to a so-called Batch process. In the method and apparatus for cooking pulp...  
WO/1998/032913A1
The invention concerns a method for making chemical paper pulp comprising: a) a step of kraft cooking lignocellulose materials with anthraquinone (AQ) for reducing the amount of hexeuronic acids in the paper pulp to a minimum; b) a step ...  
WO/1998/031871A1
The invention concerns a method for fractionating cereal straw, in particular wheat and barley which consists in contacting the straws with an aqueous basic solution, then subjecting the resulting mixture simultaneously to compression an...  
WO/1998/020198A1
The invention relates to a method of producing pulp with a high brightness using single-stage cooking with formic acid, washing with performic acid and bleaching with oxidizing bleaching chemicals. In performic acid washing, the rapid fo...  
WO/1998/017857A1
A procedure in the manufacture of lignocellulose to remove non-process elements in the form of incrust forming alkaline earth metals and other metals and transition metals is described, the extraction with a combination of an organophili...  
WO/1998/015687A1
Low temperature steaming and slurrying of wood chips results in significant improvement in treatment, the chips being maintained at a temperature below 110 �C (more desirably at about 105 �C or less, and most desirably at about 100 ...  
WO/1998/014270A1
A multi-function process is described for the hydrolysis and fractionation of lignocellulosic biomass to separate hemicellulosic sugars from other biomass components such as extractives and proteins; a portion of the solubilized lignin; ...  
WO/1998/013547A1
The invention relates to a process for producing chemical pulp from comminuted cellulose-containing material without using sulphur-containing cooking liquids, thereby removing the problems, for example smell problems, which are associate...  
WO/1998/011294A1
This invention relates to an environmentally preferred process for the delignification of a cellulosic biomass comprising pulp. The process uses the oxidative properties of nascent oxygen to complete pulping and bleaching operations. The...  
WO/1998/006857A1
A novel arabinase; a DNA encoding the arabinase; an expression vector containing the DNA; a host cell containing the vector; a process for producing the arabinase; a composition containing the arabinase, a protopectinase, and optionally ...  
WO/1998/004775A1
Ethylene diamine disuccinic acid, ethylene diamine diglutaric acid, hydroxypropylene diamine disuccinic acid, their alkaline metal salts or ammonium salts and mixtures of said compounds are used as complexing agents for alkaline earth me...  

Matches 451 - 500 out of 2,186