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JP2009001438A |
To provide a method for obtaining impurity-free high-whiteness calcium carbonate usable as a filler for paper making or a pigment for coated paper from lime sludge produced when green liquor obtained in a kraft process pulp manufacturing...
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JP4205855B2 |
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JP4187826B2 |
It is an object of the present invention to produce a cooking liquor containing polysulfide sulfur at a high concentration from white liquor in a pulp production process with a high selectivity at a low electric power with very little pr...
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JP4168156B2 |
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JP2008202185A |
To provide a scale development inhibitor, etc., capable of being produced inexpensively and by a simple production system and capable of sufficiently inhibiting the development of the scale in a green liquor production system.This scale ...
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JP4138319B2 |
To provide a method for using lignocellulose-based biomass, with which combustible gas comprising methane as a main component and containing neither carbon monoxide nor tar is obtained from the lignocellulose-based biomass not through a ...
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JP4141005B2 |
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JP4131991B2 |
An increasing problem with the pulping chemical recovery system, is the presence of chloride and potassium in the recovery boiler. Chloride and potassium increase inter alia the stickiness of carryover deposits and dust particles to the ...
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JP4123502B2 |
To provide a method for effectively preventing the precipitation of scales occurring in the alkali recovery process in a paper pulp factory. In a paper pulp factory, the calcium carbonate-containing sludge exhausted from the white liquor...
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JP2008150721A |
To improve closed systematization of a process for the increase of the pulp yield, while reducing environmental problems and to prevent both potassium accumulation on a recovery boiler and scale trouble in the boiler in the process for p...
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JP4105171B2 |
To provide a method for forming a useful gas containing hydrogen by efficiently gasifying kraft pulp black liquor; and to provide a method for producing the hydrogen. The method for gasifying the kraft pulp black liquor involves heating ...
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JP4098425B2 |
To provide the subject method comprising using part of quicklime produced from a kiln as an adsorbent for removing the Na- and S-based impurities in a gas produced by gasification of pulp cooking waste liquor so as to seek cost reduction...
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JP4058191B2 |
Process for the efficient separation of unsaps from black-liquor soaps and tall oil, which consists in the dehydration of the raw material, melting and distillation in a short path distillation column.
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JP4043526B2 |
The separation of black liquor, containing lignin, from tall oil is enhanced by the addition of a separation aid. The separation aid is an alkylphenol-formaldehyde resin alkoxylate, a poly (proplyene oxide) ethoxylate, an alkanol amine c...
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JP4028588B2 |
To provide a method for using lignocellulose-based biomass, which enables the yield of a combustible gas consisting mainly of methane and containing neither carbon monoxide nor tar from the lignocellulose-based biomass such as lumbers or...
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JP2007319842A |
To provide a method for removing an odor of an effluent and an apparatus therefor capable of reducing the odor of the kraft pulp effluent. The method enables the removal of the odor of the kraft pulp effluent produced in a pulp mill 1 us...
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JP4011812B2 |
Anthraquinone is removed from tall oil or tall oil fraction by adsorption with activated carbon. The process is particularly useful in the removal of anthraquinone from tall oil heads.
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JP3937102B2 |
To provide a deinking waste water treatment method subjecting waste water discharged from a deinking process to solid-liquid separation to reutilize water and a chemical agent dissolved in water, to enable the reduction of the generation...
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JP3916657B2 |
PCT No. PCT/FI95/00524 Sec. 371 Date May 29, 1997 Sec. 102(e) Date May 29, 1997 PCT Filed Sep. 26, 1995 PCT Pub. No. WO96/09872 PCT Pub. Date Apr. 4, 1996A liquid distributor in an evaporator, intended in particular for the evaporation t...
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JP2007510814A |
A method is provided for treating black liquor particularly derived from nonwood pulp, by heating with an alkaline earth metal oxide in a toroidal fluidised bed reactor (304) at a temperature of above 650°C. The method may be used alone...
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JP3903266B2 |
PCT No. PCT/FI95/00224 Sec. 371 Date Oct. 18, 1996 Sec. 102(e) Date Oct. 18, 1996 PCT Filed Apr. 19, 1995 PCT Pub. No. WO95/29002 PCT Pub. Date Nov. 2, 1995The invention relates to a method for fractionating a solution by a chromatograph...
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JP3897530B2 |
An improved process for inhibiting calcium carbonate scaling in aqueous systems such as that employed in the kraft process for the production of wood pulp. Such an improved process is achieved by the addition to the system of at least on...
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JP2007070784A |
To provide a method for treatment with which lignin or an alkali is efficiently separated from an alkaline black liquor discharged from the papermaking/paper pulp manufacturing industry and treated water is used as purified water.The met...
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JP2007063696A |
To provide a method for washing off scales having the excellent effect of removing scales deposited on a black liquor concentration evaporator under high-temperature and highly alkaline conditions in the alkali recovery operation in a pu...
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JP3874958B2 |
To obtain inexpensive aragonite-based burr-like calcium carbonate having excellent opacity, wire wear resistance, etc., useful as a filler for paper- making or a pigment by using a causticization process. In a first process, slaked lime ...
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JP3874978B2 |
To simultaneously obtain both of calcium carbonate of aragonite crystal useful as filler and pigment for various kind of materials and an aqueous solution of sodium hydroxide not jointly producing chlorine by utilizing caustification rea...
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JP3872611B2 |
To obtain inexpensive aragonite-based burr-like calcium carbonate having excellent opacity, wire wear resistance, excellent yield, separability of white liquor, cleanability and large particle diameters useful as a filler for paper-makin...
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JP2006342434A |
To provide a method for producing oxidized white liquor, which has a high oxidation efficiency and has slight influence on a subsequent bleaching process in a method for producing oxidized white liquor in a kraft pulp production process ...
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JP3840496B2 |
PCT No. PCT/FI96/00449 Sec. 371 Date Jul. 17, 1998 Sec. 102(e) Date Jul. 17, 1998 PCT Filed Aug. 21, 1996 PCT Pub. No. WO97/07867 PCT Pub. Date Mar. 6, 1997A liquid distributor for distributing liquid over the heat transfer surface of an...
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JP2006265747A |
To provide a method for clarifying a green liquor in production of sulfate pulp in which dregs content in the clarified green liquor is suppressed to the minimum and clarity of the green liquor is improved and operation stabilization of ...
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JP2006522235A |
A method for washing sulphate cellulose pulp in the washing department of a sulphate cellulose mill, in which method a first pulp flow ( 1 ) is conducted to a first washer ( 101 ), where a washing liquid ( 12 ) is combined with the first...
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JP3811674B2 |
To provide an industrially advantageous method for producing kraft pulp with which accumulation of especially potassium impurities is prevented and chemicals used in the process are effectively utilized. There are provided a potassium io...
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JP2006214014A |
To establish a method for analyzing a cause of operational abnormalities in an caustification process, resulting from foreign materials dissolved in green liquor by performing the adjustment of pH and analyzing the impurities precipitate...
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JP3808263B2 |
To obtain calcium carbonate of aragonite crystal which imparts properties useful for bulkiness, whiteness, opacity, wire abrasion proofing property and yield rate as a loading material for paper making by utilizing a caustification proce...
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JP3782824B2 |
The present invention relates to a digester and a method for continuously cooking kraft pulp in a single-vessel system (1), preferably a single-vessel hydraulic digester, with chips (2) being fed in at a first end (3) of the digester (1)...
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JP2005351593A |
To provide a calcined lime recovering rotary kiln for actualizing low-cost stable and efficient operation for cooking and recovering kraft pulp by efficiently firing lime sludge to suppress the production of ring deposits while preventin...
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JP2005314824A |
To provide a method for cleaning a lime mud filter by which the clogging of the lime mud filter is cleaned in a short time, while not reducing the productivity and operability so much, and while reducing the loss of energy at a firing ki...
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JP2005299054A |
To effectively practice removal of odor when stopping and opening a distillation column of a stripping apparatus in a paper pulp production plant.When the distillation column of the stripping apparatus which is facility for treatment of ...
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JP3707128B2 |
To remove molodorous matter from a waste water at the same time in the method for treating the waste water contg. the sulfide-base malodorous matter in the presence of a transition metal compd. and hydrogen peroxide by using at least an ...
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JP2005525526A |
A method to produce energy at a pulp mill, including the steps of: combusting pulping process waste liquor in the furnace of a recovery boiler to generate flue gases, recovering the heat from the flue gases by producing saturated and/or ...
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JP3687977B2 |
A rapid method is provided for the on-line determination of sodium sulfide concentration and/or percent sulfidity in green liquors or smelt solutions used for the production of either kraft or sulfite pulp. The method eliminates manual s...
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JP3683840B2 |
To provide a method for producing a porous material from a incinerated residue of papermaking sludge by which the papermaking sludge is recycled and the inexpensive porous material having excellent absorptivity is produced. The incinerat...
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JP2005200821A |
To provide a method for clarification of green liquor not only improving clarity of the green liquor but also stabilizing the caustification process after the clarification by coagulating/agglomerating the impurities in the green liquor ...
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JP2005179830A |
To provide a method for clarifying green liquor in a process of pulping with which the amount of an added flocculant relatively to the green liquor is reduced and the clarity of the green liquor can be improved while reducing the chemica...
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JP2005179785A |
To promote settling and separation of lime mud and to raise the efficiency in a step of recovering chemicals in the step of recovering the chemicals in a kraft pulping plant.The kraft pulping plant is provided with a cooking step, a gree...
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JP3667225B2 |
To provide a method for treating collected ash, by which chlorine is removed from collected ash in a digesting chemical recovery process in a pulp production. A dissolved solution of collected ash in a digesting chemical recovery process...
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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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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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JP2005504899A |
The process consists in : (a) causing the black liquor resulting form a delignification process to undergo one or more anaerobic treatments, (b) evaporating the liquor resulting from the anaerobic treatment, (c) causing the concentrated ...
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JP3620572B2 |
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