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JP2006104631A |
To provide a method for digesting lignocellulose material to give pulp of low kappa number in high yield.The method for digesting lignocellulose material to give pulp of low kappa number in high yield comprises treating the lignocellulos...
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JP2006097199A |
To provide a method for producing kraft pulp, by which the pulp can be obtained in a high yield and in a high pulp strength (especially a tensile index), and to provide an apparatus for producing the same.In this method for producing the...
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JP2005336667A |
To provide a method for digesting lignocellulose material, capable of improving a digestion yield of the material, by using a continuous digester.This method for continuously digesting the lignocellulose material comprises using a two-ve...
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JP3723573B2 |
PCT No. PCT/SE94/01135 Sec. 371 Date Nov. 6, 1995 Sec. 102(e) Date Nov. 6, 1995 PCT Filed Nov. 28, 1994 PCT Pub. No. WO95/23257 PCT Pub. Date Aug. 31, 1995The present invention relates to a process for continuous cooking of chemical pulp...
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JP3691845B2 |
An apparatus and method for bleaching high consistency lignocellulosic pulp using ozone supplied in an ozone containing gas. The bleaching reactor apparatus according to the invention is a generally cylindrical vessel with a rotatable sh...
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JP3682935B2 |
To provide a method for improving the mechanical strength characteristics of chemical cellulose pulp (esp. kraft pulp). The mechanical strength characteristics of chemical cellulose pulp is improved by low-temperature dipping infiltratio...
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JP2005185907A |
To provide the method of practical treatment of lignocellulosic material by lignin decomposition bacteria in advance in an anaerobic condition for saving resources and energy in production of paper pulp, and a practical method for anaero...
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JP3668792B2 |
To obtain an antifoaming agent for a kraft pulp producing process which has improved antifoaming characteristics even under the severe condition of high temperature, high alkali, and high shearing force and in which a pitch is generated ...
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JP2005171397A |
To provide a method for easily and inexpensively producing minute cellulose fiber using a technique different from a conventional one.The method for easily and inexpensively producing minute cellulose fiber comprises pulpifying barked st...
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JP2005133219A |
To prevent chip hanging from occurring in a two-vessel liquid-phase and vapor-phase continuous digester for producing kraft pulp.The two-vessel liquid-phase and vapor-phase continuous digester is equipped with a penetration vessel V1 of ...
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JP2005514311A |
Methods of converting a sulfide in a composition to polysulfide are described, one method comprising the steps of exposing the composition to conditions and for a time sufficient to cause conversion of at least a portion of the sulfide, ...
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JP2005120534A |
To provide a kraft digesting method for improving yield of pulp in which the yield of pulp can be improved without improving the present digesting facility and digesting method by controlling only size and thickness of chips supplied to ...
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JP2005089921A |
To provide a method for producing pulp using a liquid phase continuous digester in which occurrence of tip hanging can be prevented as much as possible in the liquid phase continuous digester for producing kraft pulp.In a liquid phase co...
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JP3621962B2 |
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JP3623469B2 |
To provide a method for the continuous pressure control of a vertical- type boiler for chopped cellulosic fibrous materials, capable of maintaining the pressure inside the boiler at a desired level, and/or maintaining the liquid level in...
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JP3620599B2 |
PCT No. PCT/SE94/00300 Sec. 371 Date Oct. 5, 1995 Sec. 102(e) Date Oct. 5, 1995 PCT Filed Apr. 5, 1994 PCT Pub. No. WO94/24363 PCT Pub. Date Oct. 27, 1994The present invention relates to a scraper device, preferably a bottom scraper arra...
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JP3615767B2 |
PCT No. PCT/BR97/00007 Sec. 371 Date Nov. 10, 1997 Sec. 102(e) Date Nov. 10, 1997 PCT Filed Mar. 5, 1997 PCT Pub. No. WO97/33035 PCT Pub. Date Sep. 12, 1997The present invention relates to a continuous process for acid hydrolysis of lign...
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JP2005002492A |
To provide a method for reducing a digestion white liquor in a continuous digester, comprising using the tower-like vessel type continuous digester to produce pulp, which enables the prevention of chip hanging and the reduction in the am...
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JP2004353108A |
To prevent occurrence of chip hanging (unsmooth drop of raw material chip) during pulp production by a column-like vessel type continuous digester.In the column-like vessel type continuous digester having constitution that in a vessel su...
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JP3600315B2 |
A foam control agent comprising 100 parts by weight of (A) a water-insoluble organic liquid, (B) from 0.1 to 20 parts by weight of a first hydrophobic filler which is insoluble in the organic liquid (A) and (C) 0.1 to 20 parts by weight ...
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JP3592587B2 |
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JP2004285531A |
To provide a technique for further improving a delignification rate in digestion in the case of producing chemical pulp from a lignocellulosic material by either one digestion method selected from kraft pulp digestion, modified kraft pul...
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JP3560162B2 |
Low temperature steaming and slurrying of wood chips results in significant improvement in treatment, the chips being maintained at a temperature below 110 DEG C. (more desirably at about 105 DEG C. or less, and most desirably at about 1...
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JP2004232184A |
To provide a feeder for comminuted cellulose fibrous material simplifying the apparatus, capable of dramatically reducing required numbers of the apparatus elements.The system for producing chemical cellulose pulp from comminuted fibrous...
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JP2004517231A |
Oxidized white liquor is heat treated to increase the concentration of PSUV measured at 285 or 286 nm or PSVIS measured at 416 nm and the PSUV/PSGR or PSVIS/PSGR ratio, whereby the content of active polysulphide in the total polysulphide...
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JP2004156176A |
To provide a method for separating a vegetable fiber, capable of saving energy and being environmentally friendly in order to solve problems in which a conventional separation means for separating a plant body into cellulose and lignin c...
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JP2004514796A |
The invention relates to a process for the production of paper from an aqueous suspen-sion containing cellulosic fibres, and optional fillers, which comprises separately adding to the suspen-sion a cationic organic polymer having one or ...
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JP2004143629A |
To improve yield and quality (especially, a tear index) of a pulp in a method for producing the pulp by using a cooking assistant for a lignocellulose material.The yield and the quality (especially, the tear index) can be improved by usi...
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JP3513619B2 |
PURPOSE: To satisfactorily and easily start a batch digester. CONSTITUTION: A first portion of washing liquid is supplied to the digester in order to displace a first portion of the spent cooking liquor having a temperature and dry solid...
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JP2004506104A |
The invention relates to a process for the production of paper from an aqueous suspen-sion containing cellulosic fibres, and optional fillers, which comprises separately adding to the suspen-sion a cationic organic polymer having one or ...
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JP2004506103A |
The invention relates to a process for the production of paper from an aqueous suspen-sion containing cellulosic fibres, and optional fillers, which comprises separately adding to the suspen-sion a cationic organic polymer having one or ...
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JP2004506105A |
The invention relates to a process for the production of paper from an aqueous suspen-sion containing cellulosic fibres, and optional fillers, which comprises separately adding to the suspen-sion a cationic organic polymer having one or ...
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JP3496872B2 |
To provide a method for supplying a finely crushed fibrous material to the top part of a treating vessel, aiming for the improvement of its simplicity, operation and maintenance by conducting a pressurized transportation by using a slurr...
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JP2004503683A |
Disclosed is a method for preparing paper pulp from cornstalks comprising the steps of cooking, washing, screening, thickening, bleaching, beating and drying performed under moderate conditions which have little noxious effects on the en...
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JP3484382B2 |
To provide a method for improving yield in kraft pulp manufacturing from a cellulose comprising broadleaf tree chips, and further to provide an apparatus therefor. The yield can be improved by at least 1-2% especially when a broadleaf tr...
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JP3467754B2 |
To provide a method for producing a pulp raw material for obtaining good-quality pulp from a plant fiber comprising a non-wood material disposed in large amounts and an apparatus used for the above producing method. A vegetable fiber suc...
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JP2003533602A |
The present invention provides compositions, useful for making lyocell fibers, having a high hemicellulose content, a low copper number and including cellulose that has a low average degree of polymerization (D.P.) and a narrow molecular...
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JP2003532806A |
The invention is lyocell fiber characterized by a pebbled surface as seen at high magnification and having a variable cross section and diameter along and between fibers. The fiber is produced by centrifugal spinning, meltblowing or its ...
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JP3461311B2 |
To provide a method utilizing the outstanding feature of a vapor phase digester having a zone filled with gas on the liquid level while having merit of a flooded-digesting can in a continuous digesting can for cellulose pulp and their ap...
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JP2003293275A |
To provide a method of improving for yield of pulp in a modified continuous cooking method or the whole boiler isothermal cooking method by providing an effective method for using a quinone compound and a polysufude in alkali cooking.The...
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JP2003278088A |
To provide a method for producing an ECF bleached pulp improving the whiteness of unbleached pulp without decreasing the unbleached pulp yield and effective for decreasing the total amount of bleaching chemicals in the ECF bleaching usin...
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JP3447264B2 |
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. a temperature of about 60-120 DEG C.) with a...
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JP2003213581A |
To provide a method for continuously producing kraft pulp, which is especially well suited for modifying existing pulp digesters without the need for incorporating additional liquor extraction screens.This method for continuously produci...
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JP2003522844A |
(57) [Summary] The present invention relates to a method for removing lignin from a lignocellulose-containing material, which comprises treating the lignocellulose-containing material with delignin gas (the gas containing chlorine dioxid...
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JP2003522845A |
(57) [Summary] The present invention comprises treating a material containing lignocellulose with a delignin gas containing a gas compound containing at least one oxygen atom, for example a gas containing chlorine dioxide, prior to a hig...
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JP2003193386A |
To reduce energy costs in a method for producing a chemical pulp by cooking wood chips including knots in a digester.This method for producing the chemical pulp comprises (a) a step for forming a low pressure slurry composed of a liquid ...
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JP2003193385A |
To provide a papermaking chemical having excellent dispersing effect and to provide a method for efficiently producing a high quality pulp.This papermaking chemical comprises a polyaminepolyalkoxylate compound obtained by adding an alkyl...
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JP2003518622A |
A rapid method is provided for the on-line spectroscopic determination of lignin content and/or kappa number in wood pulps. Unlike currently available commercial instrumentation, the method enables one to measure lignin content independe...
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JP3414747B2 |
A method of controlling the pressure of a vertical continuous comminuted cellulosic fibrous material digester having a counter-current washing zone with wash screens, a main extraction, and at least one additional extraction-dilution loo...
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JP2003518207A |
The object of the present invention is a method for making mechanical pulp, such as thermomechanical or chemi-thermomechanical stock. The mechanical pulp is used as a raw material for printing paper, and its freeness value is 30-70 ml CS...
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