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WO/1986/005708A1 |
A small deaeration tank and a process of operating this tank which may be either at atmospheric pressure or under low pressure or vacuum and a system of operating this tank which allows pulp which has been treated with oxygen to be deaer...
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WO/1986/004888A1 |
A method of removing macromolecular organic dissolved and colloidal compounds from the effluents of a paper and cellulose mill by using waste sludge containing fibres and chemicals. The sludge is acidified to a pH of approx. 2 by a miner...
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WO/1986/004366A1 |
In a method for burning evaporated waste liquor obtained at pulp production in accordance with cooking processes on sodium basis for recovering sodium carbonate and sulphide, the liquor (10) is injected towards the inlet end side (4) of ...
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WO/1986/003236A1 |
A method of removing lignin from bleach plant effluents by using cellulose fibers. The method comprises an acidous phase during which sludge containing cellulose fibres is added to the acidous effluent, and an alkaline phase during which...
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WO/1985/004202A1 |
A partially-oxidized spent pulping liquor (OESL or OCSL) is produced which is added to unoxidized strong spent pulping liquor (SSL or CPSL) prior (A), during (B), or subsequent (C) to concentration to form a novel partially-oxidized, con...
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WO/1985/002834A1 |
In a method for increasing the purity of alkali metal hydroxides, alkaline earth metal compounds are used to render contaminants insoluble, thereby lessening the entry of contaminants into a solution of alkali-metal hydroxide, or promoti...
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WO/1985/002423A1 |
Method for the production of cellulose by the batch cooking process, wherein the digester is filled with chips and cooking liquor, and the batch is cooked at elevated temperature and pressure in order to obtain a delignified cellulose pu...
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WO/1985/001966A1 |
A method for causticizing green liquor in an alkaline pulping process, advantageously in a sulphate process. The causticizing method comprises a primary causticizing process and a secondary causticizing process. In the primary causticizi...
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WO/1984/004597A1 |
A process and apparatus for measuring carbonate and sulfide concentrations in white and green pulp mill liquor and in the slaker/causticizing cells and controlling the causticizing reaction and other stages using this information. Specif...
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WO/1984/004552A1 |
A process and apparatus for measuring carbonate and sulfide concentrations in white and green pulping liquor and in the slaker/causticizing (S, C1) cells and controlling the causticizing reaction and other stages using this information. ...
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WO/1984/004114A1 |
Process for the washing of pulp with a maximum recovery of energy, the pulp after digestion being washed in a plurality of successive washing steps (1-5) at a pressure above atmospheric in at least one of the steps and washing filtrate f...
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WO/1984/003304A1 |
Comminuted cellulosic or starch containing materials, which may or may not contain lignin, are partially or totally hydrolysed or saccharified by an improved organosolv process using an aqueous acetone solvent mixture containing a small ...
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WO/1984/002428A1 |
A battery system (10, 110) wherein an electrolyte solution of lithium hydroxide dissolved in seawater is circulated through a battery cartridge (11, 111). The system is placed under pressure. A portion of the electrolyte mixture is disch...
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WO/1984/000390A1 |
A method for keeping the heating surfaces in the final thickener (VI), which is divided into several sections (A, B, C), clean in evaporating waste liquors in pulping processes for recovering the cooking chemicals. Chemical solutions e.g...
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WO/1983/003407A1 |
Improvement in a method of regenerating alkaline or alkaline earth metal oxides or hydroxides from solution particularly in delignification processes wherein a suitable transition metal such as ferric oxide is burnt with the solution to ...
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WO/1983/003435A1 |
In a pulping process comprising: a step (2) of digesting a lignocellulosic substance (F) using a digesting liquid; steps (3, 4) of separating the digested product into pulp and a waste digesting liquid; steps (5, 9) of treating the waste...
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WO/1983/003108A1 |
Method of directly in water combusting dissolved or finely dispersed organic material by means of molecular oxygen under elevated pressure and at a temperature varying between 180o and 340oC. The combustion takes place in at least two st...
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WO/1983/002294A1 |
Procedure for clarifying in particular the liquid suspensions produced in the processes of the wood-processing industry, in said procedure fibrous solid matter being removed from the liquid. According to the invention, the clarification ...
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WO/1983/002109A1 |
An improved lime slaker in which the lime is combined with the slaking liquor in a vertical conduit (18) which extends below the level of the liquor in the slaker vessel (10). The slaking liquor is introduced into the conduit at a high v...
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WO/1983/002125A1 |
A method for delignifying ligno-cellulosic materials and efficiently separate from each other the constituents thereof. Said materials which optionally may be prehydrolized are heated in an aqueous acid medium in the presence of phenol c...
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WO/1983/001469A1 |
Preparation of polysulphide for treatment of wood chips so that the wood consumption is reduced in kraft digestion of paper pulp. In an impregnation stage the wood chips are caused to react with black liquor, or black liquor components c...
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WO/1983/001437A1 |
An alkali metal oxysulfur compound is converted to a corresponding alkali metal sulfide by reaction with a solid carbonaceous material. Reaction takes place during the heating of an oxysulfur compound and carbonaceous material which resu...
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WO/1982/002909A1 |
In order to eliminate silicic acid, CO2 is introduced to lower the pH of the black lye. The SiO2 concentration of the black lye increases up to a certain value and the pH of the black lye falls to a value lower than 10 in less than 30 mi...
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WO/1982/002587A1 |
Method and apparatus for recovery of waste heat from thermomechanical pulping systems and the like (10) in which waste heat (25 and 35) in the form of steam exhausted from the mechanical pulper and latency chest (32) portions of the ther...
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WO/1982/002414A1 |
A silicon defoamer comprising silica or silicate made hydrophobic by treatment with a hydrophobic alcohol at a temperature above 100 C until the silica or silicate and the hydrophobic alcohol react, and the use of a defoaming composition...
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WO/1982/001901A1 |
Oxidized kraft white liquor is used as a pulping liquor, in excess, to give a residual spent liquor pH of more than 12 so that the resulting pulp quality and colour is equivalent to that of NSSC pulps.
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WO/1982/001019A1 |
A process to produce pulp from vegetable, cellulose-containing fibrous material such as coniferous wood, hardwood, straw, bagasse etc., the fibrous material being treated in several stages. In a first stage the fibrous material is impreg...
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WO1982000260A1 |
A system and apparatus for removing particles from suspension in a liquid, particularly for removing tall oil soap particles from black liquor. The black liquor flows along a fluid flow path (10) which runs between a source of black liqu...
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WO/1981/003506A1 |
Methods for separating into an aqueous phase and an organic phase which are not miscible the residual sulphitic or bisulphitic liquor produced by the digestion of ligno-cellulose materials after separation of the cellulose in the product...
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WO/1980/002574A1 |
A method of utilizing kraft black liquor by converting the black liquor to "green liquor" and then oxidizing the green liquor with air in the presence of a quinone compound or spent liquor from the kraft process, the soda semi-chemical p...
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WO/1980/001490A1 |
Process for separating the organic constituents of "black liquor" formed by chemical pulping of cellulose-containing materials. The black liquor is heated in a reactor (6) with CO and/or H2 under pressure which results in the conversion ...
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WO/1980/001291A1 |
Method of the liquor recovery process and more precisely after the melt dissolver and causticizing in a continuously operating mixing department. From the melt dissolver the waste gases are led through the vapour pipe and to the vapour c...
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WO/1979/000931A1 |
A process for the preparation of white liquor for the sulphate pulping process, wherein quicklime is slaked with green liquor (4) and the slaked lime formed is reacted with the sodium carbonate in the green liquor (4) to sodium hydroxide...
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WO/1979/000899A1 |
A method of reducing emissions to recipient and atmosphere and simultaneously reducing the demand for fresh chemicals for the digestion and bleaching of cellulose-containing material. The digestion of the cellulose-containing material is...
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WO/1979/000889A1 |
An air cleaner suitable for vehicles, ships, mines and tunnels has a tank for cleaning liquid, an extensible or flexible feed tube (12) for air, and means (16, 18, 20) for maintaining the outlet of the feed tube at the level of the clean...
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WO/1979/000693A1 |
Method relating to discontinuous treatment of fibre material, where the material after a first treatment (10, 12) is transferred to subsequent treatment (26, 32). A substantial portion of the liquid constituent of the material is separat...
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JP7407999B1 |
[Problem] To provide a method for suppressing the occurrence and growth of scale. The scale prevention method of the present invention is characterized by capping substances and/or scales that cause scale generation with an oil agent. [S...
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JP7407998B1 |
[Problem] To provide a scale inhibitor that suppresses the generation and growth of scale. The scale inhibitor of the present invention is characterized by containing an oil agent and a surfactant. [Selection diagram] None
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JP2023168903A |
To provide a kraft lignin purification method which inhibits adhesion to containers and the like and allows for shortened filtration time.In one aspect, a kraft lignin purification method includes the step of stirring a mixture including...
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JP2023540794A |
The smelt grinding device includes an inlet orifice, an outlet orifice, and a fluid path between the inlet orifice and the outlet orifice. A converging-diverging zone is located between the inlet orifice and the outlet orifice. In one ex...
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JP2023537805A |
The present invention provides a method of reducing metal content in a kraft pulping process comprising adding magnesium to black liquor returned to the pulping operation; so as to provide a green liquor having a specific magnesium:alumi...
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JP2023121242A |
To provide a recovery boiler capable of stably burning black liquor by forming a char bed shape in a stable shape.There is provided a recovery boiler 100, comprising: a boiler body 10; a black liquor input unit 30 that sprays black liquo...
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JP7317509B2 |
To provide a method for manufacturing liquid lignin by omitting a solidification step when separating lignin from kraft digestion black liquid or soda digestion black liquid.A lignin manufacturing method includes a step of recovering con...
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JP2023101485A |
To provide a heat recovery device and a heat recovery system from sludge in a form of electric heat energy without using a special device of converting sludge to fuel, capable of reducing the cost of transporting dried sludge, and suppre...
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JP2023527399A |
An assembly for cleaning a smelt spout includes a cleaning head, a drive rod connected to the cleaning head, and a pneumatic or other drive source connected to selectively extend or retract the drive rod. The drive rod may be connected t...
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JP2023086250A |
To provide a technique for more precisely and more easily conducting an operation control of a green liquid treatment.The invention relates to a green liquid treatment method of controlling a medicament injection rate to a coarse green l...
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JP7280563B2 |
Provided are a viscosity reducer composition and a black liquor concentration method, with which the fluidity of concentrated black liquor can be improved. The purpose of the viscosity reducer composition is to reduce the viscosity of bl...
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JP7267267B2 |
The invention concerns an apparatus (10) for separation of components with different volatility in a mixed fluid, said apparatus (10) comprising: a first heat exchanging unit (100) provided with first and second flow path structures (131...
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JP2023516085A |
A chemical recovery boiler is described in which the primary air system is reconfigured to provide positive charbed control and improved combustion in the lower furnace. A minimal number of primary air ports are used on two opposing wall...
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JP2022552669A |
A method of making purified precipitated calcium carbonate from lime mud comprises mixing lime mud cake with water and sodium carbonate to form a first slurry, aging the slurry and adding pilsonite, shortite, , and heating under conditio...
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