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JP2649399B2 |
The present invention solves the problem of managing resin-containing waste liquors within the cellulose pulp industry. The invention relates to a method for purifying resin-containing waste liquor in the manufacture of cellulose pulp, i...
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JP2644635B2 |
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JP2641874B2 |
Eenrgy and process chemicals are recovered from spent liquor in pulp preparation by thermally decomposing the spent liquor to solid and gaseous products at an elevated pressure and with addition of oxygen. The supply of oxygen should be ...
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JP2637573B2 |
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JP2634277B2 |
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JPH09507288A |
The invention relates to a recovery boiler for combustion of waste liquors. It comprises a furnace whose base and walls include a multiplicity of liquid-cooled tubes and whose base (21) constitutes a collection point for inorganic substa...
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JPH09507289A |
The invention relates to an arrangement for a recovery boiler whose flue gas is cooled, inter alia, with the aid of a pipe system (8) through which water flows, a so-called economizer. The arrangement is characterized in that the cooling...
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JPH09188985A |
To improve the efficiency of a boiler and reduce frequency for operation stopping of a boiler for cleaning. This combustion system has a furnace chamber 12 having four walls, plural black liquor injecting guns provided on at least two wa...
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JP2630507B2 |
PCT No. PCT/SE93/00688 Sec. 371 Date Feb. 23, 1995 Sec. 102(e) Date Feb. 23, 1995 PCT Filed Aug. 18, 1993 PCT Pub. No. WO94/04747 PCT Pub. Date Mar. 3, 1994The present invention relates to an environmental-friendly process for reducing t...
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JPH09506936A |
PCT No. PCT/AT94/00202 Sec. 371 Date Jun. 21, 1996 Sec. 102(e) Date Jun. 21, 1996 PCT Filed Dec. 22, 1994 PCT Pub. No. WO95/17547 PCT Pub. Date Jul. 29, 1995A process is disclosed for extracting pure, coarse-grain silicic acid crystals f...
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JPH09155331A |
To convert sulfate to sulfide and simply and inexpensively recover org. substances as heat capacity by mixing a waste liq. of photographic development with a digestion waste liq. in a Kraft pulp manufacturing process and performing burni...
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JPH09105095A |
To provide both a method for recovering a fiber from a drainage flow in high yield and a device therefor. This method for recovering a fiber useful for paper making from a drainage flow and a device therefor comprise a first treatment fo...
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JP2597023B2 |
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JPH09502651A |
A method and an apparatus for selectively removing, by liquid absorption, hydrogen sulphide from a gas containing both hydrogen sulphide and carbon dioxide, are disclosed. In a first stage of the method, the gas (3) is in a container (1)...
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JP2590261B2 |
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JP2587484B2 |
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JPH09502229A |
(57) [Summary] The present invention has been directed to a method of treating lignocellulose pulp prior to the bleaching process in order to minimize the consumption of bleach during the bleaching process, in which (a) lignocellulose pu...
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JPH09502227A |
Liquid effluent from a pulp mill bleach plant having at least one chlorine chemical bleach stage is evaporated and then used in chlorate manufacture. The bleach plant effluent produced by evaporation may be stored and then transported to...
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JP2584946B2 |
PURPOSE: To provide the subject miniaturized equipment simple in structure and reduced in both production and maintenance costs. CONSTITUTION: This equipment has a 1st tank 31 with both ends closed by specular plates 31a, 31b and a 2nd t...
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JPH09501992A |
Effluents are minimized from a cellulose pulp mill having a recovery boiler by concentrating liquid effluents from the bleach plant and/or liquid spills from process streams, incinerating the concentrated effluents in the recovery boiler...
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JP2578198B2 |
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JP2578197B2 |
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JP2578199B2 |
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JPH0929064A |
To more economically treat ozone-containing gas while reducing danger and to more reduce environmental pollution by bringing ozone-containing gas into contact with a liquid containing a reducible substance used in the production of kraft...
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JPH0929201A |
To recover effectively salt and potassium salt by a method wherein a collected ash collected from an exhaust gas of a soda recovery boiler is mixed with water to make slurry, salt in the collected ash is dissolved in water, and when a so...
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JPH0921088A |
To efficiently utilize an acidic effluent from bleaching facility in a cellulose pulp plant utilizing a digesting method using sodium as a base without polluting a process of a pulp plant with inpreferable metal ion. An effluent from ble...
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JPH0913291A |
To reduce or prevent a gaseous discharged material, released from a papermaking pulp mill and emitting a malodor when producing a pulp according to the kraft method. A white liquor or a black liquor or both are brought into contact with ...
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JPH08337983A |
To recover an inorganic material recyclable to a papermaking step by separating water containing carbon fine particles from an effluent suspension produced in the deinked waste pulp-producing step. The consistency of the underset suspens...
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JPH08337989A |
PURPOSE: To obtain a highly white pulp in a high yield and close the drainage of bleached waste water by subjecting digested pulp or oxygen-bleached pulp to a multi-combination treatment using an enzyme, a chelating agent and a surfactan...
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JPH08325971A |
To increase the whiteness of pulp that is produced via the peroxide bleaching process and minimizes the undesirable release to the environment by reusing the filtrate. Pulp is washed with a first washing solution in the first washing ste...
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JPH08511463A |
A method of separating sulphur compounds out of a gas containing carbon dioxide and hydrogen sulphide, in a gas washing system, said gas being obtained by gasification of spent cellulose liquor. According to the invention the gas washing...
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JPH08311790A |
PURPOSE: To facilitate the maintenance control and enable the production of even polysulfide cooking liquors at different concentrations. CONSTITUTION: A green liquor is treated with a gas containing carbon dioxide to regulate the pH to ...
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JP2554814B2 |
An apparatus for detecting the presence of carryover particles in an upper region of a furnace, such as a smelt bed boiler, includes plural spaced apart detectors. These detectors monitor discrete portions of the interior of the furnace ...
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JPH08510016A |
A method for reusing spent gas from an ozone bleaching reactor includes steps for removing lint from the spent gas, compressing it, passing it through a reactor in which hydrocarbons and carbon monoxide are destroyed by oxidation, and co...
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JP2543813B2 |
PURPOSE: To obtain a method for producing a microbial cellulose in which the yield of the microbial cellulose is enhanced and the inexpensive microbial cellulose can efficiently be provided by effectively utilizing a pulp waste liquor. C...
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JPH08246369A |
PURPOSE: To provide a method for rapidly and surely detecting the blocking of smeltspout in a soda recovery furnace. CONSTITUTION: This method for detecting the blocking of smeltspout in a soda recovery plant comprises providing plural s...
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JPH08243358A |
To operate a 'closed' pulp factory by supplying a solution containing cations into a compartment formed at the anode side in an effluent feed compartment and transporting the cation as a substitute for a metal impurity cation into the se...
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JPH08508546A |
A method of treating process water containing metal ions in connection with bleaching pulp of ligno-cellulose-containing material. The process water is brought into contact with an alkaline liquid, which preferably also contains sulphide...
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JP2527633B2 |
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JP2526220B2 |
Lignin is precipitated in high yields and at high rates from a black liquor produced by pulping wood at high temperatures and pressures with an aqueous lower aliphatic alcohol solvent. The lignin is precipitated by diluting the black liq...
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JPH08506993A |
A process and an apparatus in black-liquor evaporation for the selective removal, by liquid absorption, of hydrogen sulphide from the generated gas (3) containing hydrogen sulphide as well as carbon dioxide, are disclosed. In the process...
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JP2513932B2 |
PURPOSE: To prepare a thiolignin with high water solubility. CONSTITUTION: The objective compound is obtained by dissolving lignin such as a sulfonated lignin or the like in an aqueous alkaline solution, adding an organic amine-sulfuric ...
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JPH08170288A |
PURPOSE: To provide the method for removing from a caught ash the sodium and potassium salts which are concentrated and accumulated in a pulp-digesting chemical as impurities. CONSTITUTION: The method for removing sodium and potassium sa...
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JPH08168785A |
PURPOSE: To simultaneously remove various kinds of sulfide based malodorous material and to discharge the result as it is as a treated water by treating a waste water containing the sulfide based malodorous material under the presence of...
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JP2510424B2 |
Method of activating aqueous lignocellulosic material with a gas containing nitrogen oxide, followed by a delignification stage for the purpose of obtaining a high quality end product with no or only a slight effect on the environment. I...
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JPH08505662A |
A method for controlling the gas recycle loop of an ozone bleaching process wherein an ozone generator produces an ozone containing gas from an oxygen containing feed gas and delivers the ozone containing gas to an ozone reactor at a var...
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JPH08143587A |
PURPOSE: To easily obtain at low cost a low-molecular weight and orally administrable water-soluble kraft lignin having anti-AIDS virus activity and immunoactivating action by purifying kraft lignin obtained from the waste liquor resulte...
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JPH08505081A |
PCT No. PCT/AU93/00500 Sec. 371 Date May 3, 1995 Sec. 102(e) Date May 3, 1995 PCT Filed Sep. 30, 1993 PCT Pub. No. WO94/07595 PCT Pub. Date Apr. 14, 1994The specification describes a process for pelletising particles of an alkali metal f...
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JPH08504736A |
PCT No. PCT/AU93/00500 Sec. 371 Date May 3, 1995 Sec. 102(e) Date May 3, 1995 PCT Filed Sep. 30, 1993 PCT Pub. No. WO94/07595 PCT Pub. Date Apr. 14, 1994The specification describes a process for pelletising particles of an alkali metal f...
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JPH08504483A |
A conventional continuous digester is modified so as to provide a countercurrent cook throughout the entire height of the digester. Instead of connecting an upper mid-point extraction screen to a flash tank, that screen is closed off and...
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