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JPH06510091A |
(57)【要約】 本公報は電子出願前の出願データであるため
要約のデータは記録されません。
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JPH0672381B2 |
A disk screen or like shaft structure is disclosed in which screen disks, surround disks, and spacers are connected together in modular relation. The surround disks have metallic flanges which shield the plastic spacers which are located...
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JPH06192984A |
PURPOSE: To produce nonwoody pulp by storing a large amount of a raw material plant for producing nonwoody pulp without causing decomposition and using the stored raw material plant. CONSTITUTION: In producing nonwoody pulp, a raw materi...
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JPH06166976A |
PURPOSE: To provide a process for carrying out effective delignification of an unbleached paper pulp by which a pulp exhibiting high specific properties within a wide temp range. CONSTITUTION: The process is to improve the selectivity of...
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JPH06108392A |
PURPOSE: To provide a method for delignifying a chemical pulp capable of effectively delignifying an unbleached chemical pulp and consequently obtaining a pulp showing high characteristic qualities in a wide temperature range. CONSTITUTI...
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JPH0611949B2 |
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JPH065302Y2 |
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JPH05321181A |
PURPOSE: To provide the subject method capable of effectively producing pulp from a dismounted material chip remarkably low in water content and containing many voids in the chip according to the caustic cooking method by using a continu...
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JPH05195462A |
PURPOSE: To provide a method and apparatus for production of low kappa number (for example, below 20) kraft paper pulp, and a low viscosity black liquor, which is easily transported to a recovery or disposal stage. CONSTITUTION: A commin...
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JPH05503965A |
(57)【要約】 本公報は電子出願前の出願データであるため
要約のデータは記録されません。
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JPH05502480A |
PCT No. PCT/EP90/01622 Sec. 371 Date May 18, 1992 Sec. 102(e) Date May 18, 1992 PCT Filed Sep. 25, 1990 PCT Pub. No. WO91/05102 PCT Pub. Date Apr. 18, 1991.In a process for manufacturing chemo-mechanical and/or chemothermal-mechanical wo...
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JPH0551886A |
PURPOSE: To obtain cellulose having very good properties by an organosolve method similar to a sulfate method by impregnating a cellulose plant fiber material with alcohol and thereafter delignificating it under the condition of less alc...
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JPH0513042B2 |
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JPH0454681B2 |
The invention comprises a method for increasing the accessibility of cellulose in lignocellulosic materials to chemical or biochemical reagents. The material is steam cooked for a predetermined time, then rapidly depressurized. A venting...
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JPH04240283A |
PURPOSE: To provide an apparatus and process for the solvent pulping and washing of pulp, facilitating the solvent pulping and washing of the pulp and reducing the loss of an alcohol, by disposing first and second steaming vessels and fi...
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JPH04229169A |
PURPOSE: To obtain new fungi having specific desired properties, and to provide a method for preparing the fungi and using the fungi for reducing the pitch content in a pulp timber. CONSTITUTION: This new fungi for reducing pitch belong ...
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JPH0450428B2 |
A method for producing both kraft pulp and alcohol from hardwood chips or the like. The chips are subjected to mild acid prehydrolysis following by mild caustic pre-extraction. The withdrawn hydrolystate has insufficient furfural to inhi...
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JPH04502790A |
The present invention solves the problem of delignifying technical cellulose pulp in a selective manner which will result in very low residual contents of lignin in the pulp and a correspondingly high quantity of lignin dissolved in spen...
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JPH04501891A |
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JPH03238346A |
PURPOSE: To measure the quantity of pitch in a raw material and a process by performing colorimetry for the pitch in the manufacturing process by using one or more specified wavelengths within a specified range. CONSTITUTION: Light in th...
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JPH0345147B2 |
A wood chip classifier (12) and classification system (10) in which chips are separated into a plurality of fractions according to chip size in an apparatus having an automatically adjustable hole spacing for first removing from a sample...
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JPH0390689A |
PURPOSE: To readily and efficiently obtain the subject pulp, having high opacity and useful as a raw material for papermaking etc., in high yield by holding a water-insoluble solid inorganic substance in intracellular cavities of an unpu...
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JPH0351385A |
PURPOSE: To efficiently obtain the subject product of good quality in which a desired amount of a polymer is held in intracellular cavities without using an organic solvent by holding a polymer raw material in a specific state in the int...
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JPH038881A |
PURPOSE: To efficiently obtain a raw material for a chemical agent from a ligneous vegetable fiber biomass in a system continuously recycling heat without any environmental pollution by hydrolyzing a lignocellulosic material with a satur...
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JPH0258397B2 |
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JPH02503086A |
Disclosed are tetraphenyl porphyrins which are beta-substituted by fluoro or chloro and/or bear electronegative substituents on the phenyl including one or two water solubilizing substituents. The new porphorins are particularly suitable...
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JPH0240380B2 |
An inexpensive cation exchanger useful in purifying waste water is produced by treating comminuted bark in separate steps with an alkali hydroxide solution of at least 5% by weight, preferably 20-40% by weight, and with 30-75% by weight ...
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JPH02502741A |
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JPH02216289A |
PURPOSE: To make a carbohydrate in a pulp not noticeably be destroyed and to facilitate a control by adding black liquor besides white liquor to a countercurrent flow zone in amounts so as to provide a fixed high liquid/wood ratio at the...
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JPH02216290A |
PURPOSE: To suppress the formation of nitrified substance in delignifying and bleaching process by reacting lignocellulosic pulp with a sufficient liquid nitrosating agent in an acidic and oxygen atmosphere under powerful agitating condi...
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JPH02119751A |
PURPOSE: To obtain a cellulose fiber product rich in edible fibers and not practically contg. nutritive substance or ash by carrying out delignification and bleaching with an alkali soln. of a peroxide under specified conditions. CONSTIT...
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JPH02112495A |
PURPOSE: To eliminate the troubles caused by air or gas in the fibrous suspension by using a substitute pump that is equipped with a unit that can remove the gas and air from the fibrous suspension instead of the pulp suspension transpor...
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JPH0214474B2 |
In the continuous manufacture of cellulose pulp it has been found that air often remains in the lignocellulosic material subsequent to steaming the same. These air inclusions cause the lignocellulosic material to float in the cooking liq...
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JPH0280682A |
PURPOSE: To provide a method for sorting wood chips, capable of accurately controlling a pulping process and enhancing the whole capacity of a digester by dividing the flow of the wood chips into four separated flows, independently subje...
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JPH0261190A |
PURPOSE: To improve the physical property and dimensional stability of the subject pulp useful as a paper-making raw material by impregnating a polymer- forming material into the intracellular space of an unfibrillated lignocellulose mat...
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JPH028074B2 |
A process is provided for reducing carbohydrate losses in the sulphate pulping of wood using sodium hydroxide and sodium sulfide, by pretreating the wood in the presence of water with oxygen gas and nitrogen oxide such as NO2 and/or NO a...
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JPH02474B2 |
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JPH0156196B2 |
Apparatus for reacting lignocellulosic material with a gas phase comprising a nitrogen oxide and oxygen under controlled gas pressure in the presence of water, for example, as a pretreatment before an alkaline delignification, comprising...
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JPH01280088A |
PURPOSE: To efficiently obtain modified pulp having excellent sheet forming properties and improved physical properties and dimensional stability by holding, polymerizing and immobilizing a polymer raw material in intracellular cavities ...
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JPH0114355B2 |
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JPS6356359B2 |
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JPS6346198B2 |
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JPS63175188A |
A process for recirculating phenol in a lignocellulosic materials digestion process in which lignocellulosic material is digested with phenol-containing solutions in order to dissolve lignin, characterised in that phenol recirculation is...
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JPS6385194A |
Procedure for the formation of chemical pulp comprising desfibrar (12) partially pieces of wood so that the fiber of such cuts to separate substantially each other, but maintaining a sufficient bond between fiber to preserve the integrit...
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JPS6321993A |
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JPS6262194B2 |
A process is provided for heating up wood chips in one or more stages at progressively higher temperatures prior to steaming and pulping in an economical manner at a considerable cost saving; heating the chips in at least a first preheat...
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JPS6257756B2 |
A two-stage process is provided for the conversion of lignocellulosic material, for instance, wood, to cellulose pulp, first oxidizing the lignocellulosic material to form aldonic acid end groups, preferably bound with 1,4-glycosidic bon...
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JPS6231110B2 |
A process is provided for pretreating particulate lignocellulosic material to remove heavy metals and resin without any delignification or defibration, which comprises washing particulate lignocellulosic material; compressing the washed ...
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JPS61258090A |
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JPS61258089A |
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