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JPH08504005A |
The present invention relates to a process for producing pulp which is cooked under alkaline conditions and which is bleached without using chlorine-containing bleaching chemicals, in which process used cooking chemicals are recovered in...
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JPH0830311B2 |
A 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 ...
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JPH08502102A |
PCT No. PCT/SE93/00782 Sec. 371 Date Mar. 23, 1995 Sec. 102(e) Date Mar. 23, 1995 PCT Filed Sep. 29, 1993 PCT Pub. No. WO94/09204 PCT Pub. Date Apr. 28, 1994The invention relates to a process for dividing up the sulphide content of green...
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JPH087202Y2 |
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JPH0819632B2 |
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JPH08501605A |
PCT No. PCT/SE92/00363 Sec. 371 Date Nov. 29, 1994 Sec. 102(e) Date Nov. 29, 1994 PCT Filed May 29, 1992 PCT Pub. No. WO93/24703 PCT Pub. Date Dec. 9, 1993.A process for recovering energy from a combustible gas generated by partial oxida...
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JPH0811875B2 |
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JPH089837B2 |
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JPH088982B2 |
The process comprises injecting into the inlet of a polyphase tubular reactor (6), on one hand, the aqueous solution at such temperature that the oxidation reaction occurs at a temperature between 50 DEG C. and 370 DEG C. and at an absol...
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JPH08500854A |
(57) [Summary] Pulp bleaching and de-lignin filtrates are recycled and reused in pulping, separation, and recovery of lignin and other by-products, saving considerable energy and eliminating contamination typically associated with bleach...
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JPH086887B2 |
PURPOSE:To obtain an exhaust gas recovery boiler power plant which provides a black liquid recovery which uses black liquid as a fuel and a gas turbine and which is capable of reducing the construction cost, enhancing reliability and inc...
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JPH084800B2 |
An anionic/cationic polymer mixture comprising: (a) a polyanion selected from polyacrylic acid (AA), polymethacrylic acid (MAA), polymaleic acid/anhydride (MA), polyitaconic acid (IA), polyvinyl sulfonic acid (VSA), poly(2-acrylamido-2-m...
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JPH08500645A |
Methods of treating process water containing metal ions is disclosed including contacting the process water with a pulp comprising lignocellulose-containing material at a pH of above about 7 and a temperature of from about 50 DEG to 120 ...
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JPH081408Y2 |
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JPH081035B2 |
The present invention relates to a method and apparatus for evaporating waste liquor produced when cooking fibrous material containing cellulose in a continuous pulp digester. In the continuous cooking process, fibrous material is heated...
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JPH081034B2 |
A process for combusting black liquor by enriching the normal process air used in the combustion process by the addition of up to 5% oxygen.
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JPH07121333B2 |
Sulphur dioxide is separated from the flue gases of a cellulose pulp mill by absorbing it into a sodium sulphite solution. Sulphur dioxide is regenerated from the sodium bisulphite solution produced by an evaporation-crystallization meth...
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JPH07122226B2 |
Chemicals are recovered during the production of cellulose pulp by forming two different sulfidity melts in two different sections of a soda recovery boiler, and then producing cooking liquors from different melts in dissolving tanks. Th...
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JPH07114959B2 |
PURPOSE:To regenerate active carbon catalysts efficiently by flowing hydrochloric acid and air simultaneously through a catalyst layer with active carbon catalysts which is lowered catalyst performance by the oxidative reaction treatment...
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JPH07316994A |
PURPOSE: To provide a method for efficiently recovering caustic soda from a pulp waste liquor generated in a process for producing pulp with easy handleability. CONSTITUTION: This method for recovering caustic soda from a pulp waste liqu...
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JPH07316995A |
PURPOSE: To obtain a surface covering material for a smelt spout of a soda recovering boiler having high corrosion resistance to smelt and toughness. CONSTITUTION: This surface covering material for a smelt spout 1 is obtained by using a...
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JPH07305288A |
PURPOSE: To provide a method for smoothly peeling a dregs cake from a filter cloth. CONSTITUTION: An air pipe 21 having plural air nozzles is placed near an delivery roll 4 of a belt filter 3 and the filter cake D transferred with a belt...
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JPH07107236B2 |
In a causticizing process for separating at least white liquor and lime sludge out of the process, filters in the form of discs or drums are arranged. The filtrations take place under positive pressure and the filters are arranged in a c...
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JPH0749203Y2 |
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JPH0748713Y2 |
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JPH07509284A |
Apparatus for a pulp and paper mill, and methods of acting on liquid effluents produced in the mill, which minimizes the discharge of polluting gaseous and liquid effluents to the environment. Liquid effluents from the bleach plant are c...
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JPH0788921B2 |
A process and apparatus for generating steam from wet fuel, wherein water is evaporated from the wet fuel by bringing the fuel into direct contact with superheated steam. The steam is superheated by bringing it into contact with a hot he...
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JPH07508564A |
(57) [Summary] Since this publication is application data before electronic filing, summary data is not recorded.
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JPH0740556Y2 |
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JPH0740558Y2 |
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JPH0740559Y2 |
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JPH0740557Y2 |
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JPH07242788A |
PURPOSE: To inhibit the deposition within evaporation tubes for condensing a sugar liquor in a sugar manufactory and a black liquor in the pulp industry by using a blocking agent (mixture) and a deposition inhibitor composed of a terpoly...
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JPH0784716B2 |
Sodium hydroxide is recovered from an alkaline waste liquor ("black liquor") containing substantially no sulfur compounds discharged from a process comprising soda cooking wood fibers, washing and optionally bleaching them, by a direct c...
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JPH07507850A |
The removal of bleaching chemical-consuming metals from treatment fluids in a cellulose pulp mill is facilitated by treating the pulp in an acidic or neutral stage to dissolve metals, washing or thickening the pulp to produce a filtrate ...
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JPH0776601B2 |
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JPH07208733A |
PURPOSE: To automatically monitor a burning state in a furnace by collecting it as a plurality of process data regarding an image and combustion. CONSTITUTION: An image processor 2 fetches a flame image signal X in a furnace, processes i...
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JPH07207591A |
PURPOSE: To provide a new method for removing chlorine by which problems such as a chemical loss in a dechlorinating apparatus for a substance, containing a chloride and produced from a soda recovering boiler, etc., of a pulp manufacturi...
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JPH07507113A |
A black liquor gasification system intended for use as a replacement for a Tomlinson cycle, Chemical Recovery Unit, and which operates at a temperature below the ash melting temperature thereby removing the potential for smelt-water reac...
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JPH07506858A |
PCT No. PCT/SE93/00406 Sec. 371 Date Oct. 26, 1994 Sec. 102(e) Date Oct. 26, 1994 PCT Filed May 10, 1993 PCT Pub. No. WO93/23502 PCT Pub. Date Nov. 25, 1993This invention relates to a device for thermal decomposition of stock, especially...
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JPH07506877A |
PCT No. PCT/FI93/00051 Sec. 371 Date Aug. 12, 1994 Sec. 102(e) Date Aug. 12, 1994 PCT Filed Feb. 17, 1993 PCT Pub. No. WO93/17179 PCT Pub. Date Sep. 2, 1993.The invention relates to a method and apparatus for use in the pulp industry for...
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JPH07506859A |
PCT No. PCT/SE93/00406 Sec. 371 Date Oct. 26, 1994 Sec. 102(e) Date Oct. 26, 1994 PCT Filed May 10, 1993 PCT Pub. No. WO93/23502 PCT Pub. Date Nov. 25, 1993This invention relates to a device for thermal decomposition of stock, especially...
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JPH07506156A |
Off gases from black liquor heat treatment, evaporators, wood pulp digesters, etc. are treated to produce primarily hydrogen sulfide and sulfur free fuel gases such as methane, carbon monoxide, hydrogen, and ethylene. Then the hydrogen s...
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JPH0762317B2 |
The invention concerns a causticizing procedure by which from soda liquor derived from a sulphate cellulose digesting process and from unslaked lime is produced white liquor for reuse in the digesting process, over lime slaking and a sub...
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JPH0762318B2 |
The Invention relates to a process of increasing the solids content of black liquor at its recovery in a sulfate pulping process. According to the invention, the liquor is first heated at a presure which is so high that no boiling occurs...
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JPH0729362Y2 |
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JPH07157992A |
PURPOSE: To provide a method for crushing a dam ring in a lime kiln, improved in operation stability and safety and reduced in under-production. CONSTITUTION: A high-pressure water is injected onto a ring-shaped or bulk- shaped dam ring ...
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JPH07505084A |
The present invention relates to a process and a device for the separation and purification of gas from a fiber suspension, especially residual gas after ozone delignification or pulp suspension, wherein the suspension together with the ...
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JPH07145586A |
PURPOSE: To efficiently cleanse the green solution pipings of a soda-recovering boiler installation. CONSTITUTION: A communicating pipe (13) for communicating plural system green solution-transferring pipes (2a), (2b) with each other thr...
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JPH0721600Y2 |
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