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JP2884870B2 |
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JP2876428B2 |
A method for improving pulp brightness utilizes a combination of a distributed total white liquor charge during the warm fill, hot fill and cooking stages of a batch cooking process and low cooking temperatures during the cooking stage. ...
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JP2864168B2 |
PCT No. PCT/SE94/00526 Sec. 371 Date Dec. 18, 1995 Sec. 102(e) Date Dec. 18, 1995 PCT Filed Jun. 1, 1994 PCT Pub. No. WO95/00701 PCT Pub. Date Jan. 5, 1995Sulphide-containing white liquor is treated in a continuously operating electrolyt...
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JPH11502465A |
Pulping chemicals and hemicellulose are recovered from a starting solution essentially free of lignin but containing a mixture of hemicellulose and caustic by electrolyzing this solution in the anolyte compartment of an electrolytic cell...
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JPH11502268A |
A high solids black liquor which has solids content of at least 65% by weight of liquor is mixed with a viscosity reducing additive prior to firing in a chemical recovery furnace. The additive is an admixed compound consisting of monoeth...
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JPH1143883A |
To enable to prevent that a smelted material is solidified, when flowing on a spout for the smelted material, and automatically remove the solidified smelted material without using a man power. This method for cleaning a smelted material...
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JP2589233Y2 |
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JPH1112973A |
To provide a recovery boiler composed so as to remove K and Cl accumulated in a black liquor line and to make solvable problems such as the corrosion of the boiler and sticking of ash to a superheater, etc., in the boiler. The recovery b...
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JP2845540B2 |
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JPH10513226A |
(57) [Summary] A method of recovering / purifying bleached waste liquid from a bleaching plant for cellulose fibers (20), in which the bleached filtrate (20) is a portion of the cellulose consuming liquid or a plant for burning above the...
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JP2836901B2 |
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JPH10317292A |
To provide an apparatus capable of automatically setting an optimum feed rate of combustion air without manually setting a correction coefficient by judgment of an operator, and capable of effectively utilizing as a backup circuit when a...
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JP2817651B2 |
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JP2817648B2 |
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JP2815701B2 |
The invention relates to a process for preparation, under reducing conditions, of cooking liquors having high sulphidity for sulphate pulp cooking, wherein the black liquor obtained in the cooking process is fed, after evaporation, compl...
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JP2815702B2 |
PCT No. PCT/SE91/00786 Sec. 371 Date Oct. 28, 1993 Sec. 102(e) Date Oct. 28, 1993 PCT Filed Nov. 20, 1991 PCT Pub. No. WO92/09742 PCT Pub. Date Jun. 11, 1992.In a chemicals recovery plant in a sulphate pulp mill, in order to provide gree...
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JPH10280290A |
To provide both a method for treating a smelt, capable of efficiently separating sodium carbonate from a smelt of a black liquor formed in recovery boiler of kraft pulp without supplying energy from the outside and freely changing the co...
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JPH10510469A |
A method for reprocessing an ozone-containing gas present in a pulp bleaching plant comprising the steps of supplying the ozone-containing gas to a scrubber and reducing the ozone concentration of the gas as the gas flows through the scr...
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JPH10509481A |
Process for recovering chemicals and energy from spent liquor obtained when producing paper pulp by chemical delignification of fibrous raw material. The spent liquor is gasified in at least two reactors, a first and a second stream of s...
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JP2796477B2 |
A method for white liquor oxidation in a kraft mill utilizes a two-stage selective oxidation system in which the first stage (108) is operated to remove sulfide while the second stage (107) is operated to oxidize a significant fraction o...
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JP2793331B2 |
A method and apparatus provide for the continuous digestion of comminuted cellulosic fibrous material (e.g. wood chips) to produce paper pulp, with increased sulfidity. When black liquor is withdrawn from the continuous digester (32), in...
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JP2781686B2 |
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JPH10506964A |
(57) [Summary] Acid and alkaline wastewater from bleaching plants contain different amounts of inorganic and organic substances and have different salt contents. When acidic and alkaline wastewaters are mixed, it becomes more difficult t...
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JP2772123B2 |
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JPH10153312A |
To prevent corrosion at an air nozzle of a recovery boiler caused by smelt produced from black liquor in a paper making process. An air nozzle 4 is formed of a material comprising 0.080wt.% or less of C, 35.0 to 60.0wt.% of Cr, 10.0wt.% ...
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JPH10131071A |
To increase the through-put of an apparatus for baking in a baking process by improving the thermal efficiency in a drying and a preheating steps, and in its turn to save of the whole system. A sludgy raw material 1 is mixed with a dried...
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JP2751085B2 |
PCT No. PCT/SE93/00664 Sec. 371 Date Feb. 13, 1995 Sec. 102(e) Date Feb. 13, 1995 PCT Filed Aug. 11, 1993 PCT Pub. No. WO94/05595 PCT Pub. Date Mar. 17, 1994Aqueous suspensions of colloidal particles which particles are both silica based...
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JPH10504607A |
Process for recovering chemicals and energy from black liquor, where the black liquor is gasified with CO, CO2, CH4, H2, and H2S, in gaseous form, and Na2CO3, NaOH and Na2S, in the form of drops of smelt, being principally formed. The mi...
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JP2746984B2 |
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JP2740521B2 |
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JP2719625B2 |
PCT No. PCT/FI93/00426 Sec. 371 Date Apr. 13, 1995 Sec. 102(e) Date Apr. 13, 1995 PCT Filed Oct. 18, 1993 PCT Pub. No. WO94/09205 PCT Pub. Date Apr. 28, 1994An apparatus for use in the pulp industry for recovering heat in the spent liquo...
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JP2719626B2 |
PCT No. PCT/FI93/00427 Sec. 371 Date Apr. 13, 1995 Sec. 102(e) Date Apr. 13, 1995 PCT Filed Oct. 18, 1993 PCT Pub. No. WO94/09206 PCT Pub. Date Apr. 28, 1994A method and apparatus for use in the pulp industry for recovering heat in the s...
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JPH1053989A |
To cook a pulp raw material by using a smaller amount of white liquor and obtain pulp having good pulp strength and breaching degree by diverting a part of green liquor to carbonate crystallization process and causticizing the separated ...
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JPH10502138A |
(57) [Summary] Wood pulp is subjected to an oxygen delignin step, a washing sequence, a first chlorine dioxide bleaching step, an oxidative extraction step, and at least one final chlorine dioxide bleaching step after brown stock washing...
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JP2713429B2 |
PURPOSE: To increase the total production capacity of the subject sulfate pulp process by removing a certain part of the organic component in the black liquor in the form of the lignin form and allowing the residual to return to the main...
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JP2709192B2 |
PCT No. PCT/CH93/00108 Sec. 371 Date Jan. 5, 1994 Sec. 102(e) Date Jan. 5, 1994 PCT Filed Apr. 30, 1993 PCT Pub. No. WO93/22492 PCT Pub. Date Nov. 11, 1993A process for the production of cellulose from wood and annual plants is provided ...
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JP2701637B2 |
PURPOSE: To treat efficiently a coating color waste water regardless of influence by its generating source and amount by mixing waste water after chlorination with bleaching sulfate pulp with an ordinary subject waste water, separating a...
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JPH10500180A |
The invention relates to a method for improving the filterability of the green liquor in the kraft pulp process by means of adding aluminium in the form of elemental aluminium or an aluminium-containing chemical compound to the process i...
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JP2691093B2 |
PURPOSE: To provide superior high temp. corrosion resistance under a severe corrosive environment by controlling C content while maintaining Cr content at high value and also adding specific amounts of Ni. CONSTITUTION: The alloy has a c...
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JP2684348B2 |
PURPOSE: To provide the subject apparatus for heat-treating and gasifying a residual waste liquor such as black liquor with a fluidized bed, recovering a waste heat and removing impurities to efficiently obtain a formed product gas flow....
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JP2684816B2 |
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JP2680157B2 |
Resonant tubes of a pulse combustor are immersed in a bed of solid particles in a reaction zone to provide indirect heat from the pulsating combustion gases to the solid particles of the bed. The bed is maintained in an agitated state by...
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JP2680723B2 |
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JP2677328B2 |
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JP2667467B2 |
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JPH09510265A |
PCT No. PCT/FI95/00125 Sec. 371 Date Sep. 11, 1996 Sec. 102(e) Date Sep. 11, 1996 PCT Filed Mar. 6, 1995 PCT Pub. No. WO95/25198 PCT Pub. Date Sep. 21, 1995A method and apparatus for treating green liquor from a sulphate pulp mill enhanc...
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JPH09510264A |
PCT No. PCT/AU95/00150 Sec. 371 Date Aug. 5, 1996 Sec. 102(e) Date Aug. 5, 1996 PCT Filed Mar. 17, 1995 PCT Pub. No. WO95/25197 PCT Pub. Date Sep. 21, 1995A paper mill and method of producing paper from waste paper in which no liquid eff...
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JP2651422B2 |
Method of reducing color in bleach plant extraction filtrates derived in the bleaching of pulp without giving rise to the formation of chloroform and other chlorinated by products comprising contacting a bleach plant extraction filtrate ...
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JPH09234302A |
To provide an apparatus provided to the soda recovery boiler of a pulp manufacturing factory and removing a potassium salt being impurities in pulp digestion chemicals and to control the temp. in the apparatus. The ash collected from the...
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JPH09508884A |
The present invention relates to a process for producing hydrogen peroxide, preferably intended for use in the bleaching of pulp, in which the hydrogen gas necessary for producing the hydrogen peroxide is generated wholly or partly by th...
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