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Patent Searching and Data


Matches 901 - 950 out of 2,134

Document Document Title
WO/1988/003190A1
A process and apparatus for transforming and/or extracting lignin or its decomposition products from lignin-cellulosic materials. For this purpose, a redox potential in the 200-500 mV range is set by adding oxidizing and/or reducing agen...  
WO/1987/007314A1
Procedure for prebleaching cellulose pulp obtained by a chemical process. The cellulose pulp is treated with a phenol solution at elevated temperature, whereafter the cellulose pulp is, possibly after washing, bleached by single or multi...  
WO/1987/003022A1
Mechanical pulp intended for coated light weight paper (LWC), magazine paper or the like made as follows. Impregnation and preheating of the material, refining in a double-disc refiner, bleaching, refining in a single-disc refiner and sc...  
WO/1987/002721A1
Method for the separation of gases from the cooking liquor of cellulosic pulp during cooking, in which method cooking liquor and, along with it, gases and extract materials are passed through a screen (4) placed on the wall of the digest...  
WO/1987/001402A1
A method for the production of cellulosic pulp comprises defibration of a fibrous raw material consisting of wood chips, straw, bagasse, reed or the like. The fibrous raw material is impregnated by an aqueous solution of sodium carbonate...  
WO/1986/005529A1
Lignocellulosic raw material is pulped with a cooking liquor containing organic peroxyacids, such as peroxyformic acid or peroxyacetic acid, and the defibred pulp is bleached with an alkaline solution containing hydrogen peroxide, the pH...  
WO/1986/002393A1
A process of manufacturing cellulose pulp from wood by division with sulphite cooking liquor containing additions of sulphide and in the presence of a quinonoide or hydroquinonoide compound. According to the invention, the mole ratio bet...  
WO/1986/001843A1
A method of obtaining cellulase deficient strains which have great ability to degrade lignin at the same time. The method comprises crossing a homokaryotic cellulase deficient mutant of a white-rot fungus having a full sexual cycle with ...  
WO/1985/004409A1
Procedure for recovery of soluble carbohydrates present in wood, in connection with the alkaline cellulose digesting process. According to the invention, recovery of carbohydrates takes place at the initial phase of the cellulose digesti...  
WO/1985/002423A1
Method for the production of cellulose by the batch cooking process, wherein the digester is filled with chips and cooking liquor, and the batch is cooked at elevated temperature and pressure in order to obtain a delignified cellulose pu...  
WO/1985/000133A1
Chemical treatment of bulky organic materials, in particular straw and other biomass, with volatile chemicals, such as NH3, SO2, HF, HCl, which is added to the material before, during or after a (semi)continuous compression, in particula...  
WO/1984/004937A1
A process for the chemical pulping of lignocellulosic material, wherein said lignocellulosic material is subjected to an alkaline nitrate cooking procedure at a pH of 11 to 13,5 in the presence of an aluminium salt.  
WO/1984/003527A1
Preparation of cellulose pulp by treating lignocellulose material such as wood, bagasse, etc. in solid phase after impregnation with a chemical reactant, the quantity of aqueous solution during such treatment being very much reduced, fro...  
WO/1984/003304A1
Comminuted cellulosic or starch containing materials, which may or may not contain lignin, are partially or totally hydrolysed or saccharified by an improved organosolv process using an aqueous acetone solvent mixture containing a small ...  
WO/1984/003286A1
Raw sugar-beet pulp impregnated with acidified water is subjected to a succession of alternated compressions and decompressions. This mechanical stress causes a sort of retting of the pulp fibers, that is to say an effect such that they ...  
WO/1984/002428A1
A battery system (10, 110) wherein an electrolyte solution of lithium hydroxide dissolved in seawater is circulated through a battery cartridge (11, 111). The system is placed under pressure. A portion of the electrolyte mixture is disch...  
WO/1983/003435A1
In a pulping process comprising: a step (2) of digesting a lignocellulosic substance (F) using a digesting liquid; steps (3, 4) of separating the digested product into pulp and a waste digesting liquid; steps (5, 9) of treating the waste...  
WO/1983/002469A1
The process involves selection of a lignin-containing fiber source, having a lignin content of at least about 10 %, and thermomechanically pulping the fiber source under temperature/pressure conditions of 300oF-350oF/ 50 psig- 120 psig a...  
WO/1983/002125A1
A method for delignifying ligno-cellulosic materials and efficiently separate from each other the constituents thereof. Said materials which optionally may be prehydrolized are heated in an aqueous acid medium in the presence of phenol c...  
WO/1983/001469A1
Preparation of polysulphide for treatment of wood chips so that the wood consumption is reduced in kraft digestion of paper pulp. In an impregnation stage the wood chips are caused to react with black liquor, or black liquor components c...  
WO/1983/000816A1
Process and apparatus for mixing a wood pulp slurry with a chemical at the consistency at which the slurry exits a washer or the subsequent stem mixer, 7 to 15%. The chemicals would include non-condensable or unsaturated gases such as ox...  
WO/1982/003409A1
Comminuted cellulosic materials which may or may not contain lignin are partially or totally hydrolyzed or saccharified by an improved organosolv process using an aqueous acetone solvent mixture containing a small amount of an acidic com...  
WO/1982/002414A1
A silicon defoamer comprising silica or silicate made hydrophobic by treatment with a hydrophobic alcohol at a temperature above 100 C until the silica or silicate and the hydrophobic alcohol react, and the use of a defoaming composition...  
WO/1982/001901A1
Oxidized kraft white liquor is used as a pulping liquor, in excess, to give a residual spent liquor pH of more than 12 so that the resulting pulp quality and colour is equivalent to that of NSSC pulps.  
WO/1982/001902A1
Procede de pulpage du bois et de l'ecorce dans de l'acide formique avec une concentration d'au moins 35 , la concentration ideale se situant entre 65 et 90 , avec reflux a la pression atmospherique, pour produire de la pulpe de bois et d...  
WO/1982/001568A1
A method for manufacturing wood pulp which comprises pulping wood with a mixture of ethanol and sodium hydroxide and wood pulp manufactured in accordance with the method.  
WO/1982/001019A1
A process to produce pulp from vegetable, cellulose-containing fibrous material such as coniferous wood, hardwood, straw, bagasse etc., the fibrous material being treated in several stages. In a first stage the fibrous material is impreg...  
WO/1982/000483A1
A high yield of a high quality pulp is obtained by cooking fragmented lignocellulose material at a temperature of 180 to 240 C with a mixture of methanol or ethanol and water containing 80 to 98 percent by volume of the alcohol, the mixt...  
WO/1981/003505A1
Method for selectively defiberizing and delignifying lignocellulose employing a novel alkaline pulping system. The subject pulping system includes a pulping liquor comprising water, a water-miscible organic reagent, and a sulfide or bisu...  
WO/1981/000267A1
A process for making defibered pulp material comprising the steps of treating fibrous ligno-cellulosic material with aqueous nitric acid or nitrate salts having a nitrate ion concentration of about 0.001 to 9.0 wt.% and containing at lea...  
WO/1980/002574A1
A method of utilizing kraft black liquor by converting the black liquor to "green liquor" and then oxidizing the green liquor with air in the presence of a quinone compound or spent liquor from the kraft process, the soda semi-chemical p...  
WO/1980/000159A1
The process comprises the attacking of a cellulosic plant material, by separation of binding substances, such as lignin, by using amino organic compounds. In most of the known processes which use aqueous solutions or dispersions of the a...  
WO/1979/000152A1
Shelf life of silica based defoamer composition is improved by adding oil soluble resins and optionally aliphatic fatty acids to retard separation and to inhibit settling. The composition is useful in preventing foaming or in defoaming a...  
WO/1979/000119A1
Minced lignocellulose, such as wood, straw, bamboos, bagasse or any other structured vegetal material, is treated in a discontinuous or continuous process. The process consists in boiling this material in an acidified mixture of solvents...  
JP2024012073A
The present invention provides a method for producing tea dregs fiber raw material and its use. [Solution] Tea dregs fiber raw material is obtained by sun-drying and pulverizing tea dregs, sequentially treating them with concentrated hyd...  
JP2024005966A
An object of the present invention is to provide a digestion accelerator with further improved cooking efficiency, and a method for producing pulp using this digestion accelerator. [Solution] The digestion accelerator includes a specific...  
JP2024501678A
Disclosed herein is a method of producing pulp or paper products from plant material having bast fibers and wood fibers, such as cannabis plant material. For example, a method for producing pulp or paper products from plant material havi...  
JP2023552954A
A foam control agent, and a method of controlling foam for paper and pulp production using a foam control agent, wherein the agent comprises at least a branched alcohol.  
JP7353188B2
A method of increasing the throughput and/or decreasing the energy usage of a pulping process includes the steps of providing a plurality of lignocellulosic chips, providing a refining composition, applying the refining composition to th...  
JP2023536569A
The present invention discloses a cooking method in which partially digested wood cellulosic feedstock is compacted during cooking to provide high molecular weight xylan, lignin and pulp.  
JP2023532750A
The present invention discloses a cooking method and digesting system that compresses a partially digested cellulosic fiber source during cooking to provide high molecular weight xylan, high molecular weight lignin and pulp.  
JP7300230B1
[Problem] To satisfy all of the following conditions when converting waste paper into pulp: efficiency by shortening the process, resolving concerns about costs and supply, reducing environmental load, and ensuring operational safety. pr...  
JP7292296B2
A process for producing dissolving pulp from comminuted wood-based fibrous material. The process includes the following consecutive stages: cooking comminuted fibrous material with alkaline cooking liquor in a kraft cooking process to pr...  
JP2023523935A
Fragments of natural plant material are subjected to one or more chemical treatments to remove substantially all lignin. This allows the extraction of delignified cellulosic fibers. For example, natural plant material is grass such as ba...  
JP2023077170A
To provide a manufacturing method of a chemical pulp capable of manufacturing low-kappa-value pulp while suppressing yield reduction in one embodiment.One embodiment of the present invention is a manufacturing method of a chemical pulp i...  
JP7270180B2
To provide a method for producing chemical pulp that can improve the yield of carefully selected pulp and can reduce a kappa value, and a pulp digestion aid.A method for producing chemical pulp includes subjecting a lignocellulose materi...  
JP2023516140A
A method of delignification of plant material comprising providing said plant material comprising cellulosic fibers and lignin and exposing said plant material to a composition comprising an alkylsulfonic acid and a peroxide. wherein the...  
JP2023515047A
An aqueous acid composition comprising sulfuric acid; a compound comprising an amine moiety and a sulfonic acid moiety; and optionally a peroxide. Use of the composition in biomass processing is also disclosed. [Selection figure] None  
JP2023515044A
An aqueous composition comprising sulfuric acid, a compound containing an amine moiety, a compound containing a sulfonic acid moiety, and a peroxide. The composition is capable of delignifying biomass. [Selection figure] None  
JP7243009B2
The present invention relates to a method of pulping cotton-based raw material for producing dissolving pulp. More specifically, the invention relates to a process for producing dissolving pulp under alkaline conditions in combination wi...  

Matches 901 - 950 out of 2,134