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Patent Searching and Data


Matches 301 - 350 out of 760

Document Document Title
WO/1991/004371A1
An improved plug screw feeder for removing excess fluid from materials or for refining materials having an inlet for materials and at least one outlet, the improvement comprising means to feed material under pressure into the inlet of th...  
WO/1988/006201A1
In a process for digesting plant and wood fibers or for delignification, optinally with preceding deinking, of fibers from chemical or mechanical pulps, optionally with succeeding bleaching, the fibrous raw material is digested or delign...  
WO/1988/003190A1
A process and apparatus for transforming and/or extracting lignin or its decomposition products from lignin-cellulosic materials. For this purpose, a redox potential in the 200-500 mV range is set by adding oxidizing and/or reducing agen...  
WO/1987/002721A1
Method for the separation of gases from the cooking liquor of cellulosic pulp during cooking, in which method cooking liquor and, along with it, gases and extract materials are passed through a screen (4) placed on the wall of the digest...  
WO/1985/001305A1
Method for filling a batch digester for pulp, in which method the material to be defibrated is mixed with liquid outside the digester and is introduced into the digester as mixed with this liquid. The digester is filled preferably throug...  
WO/1984/003724A1
A reactor (10) suited to accomplish at the same time the chemical reactions and operations of size reduction of the solid materials in suspension and particularly for treatments in the cellulose and/or paper pulp industry; characterized ...  
WO/1983/000816A1
Process and apparatus for mixing a wood pulp slurry with a chemical at the consistency at which the slurry exits a washer or the subsequent stem mixer, 7 to 15%. The chemicals would include non-condensable or unsaturated gases such as ox...  
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...  
WO/1979/000692A1
Method and device to transfer materials transportable with a liquid between various treatment stages, preferably from digesting (10-16) to a subsequent treatment (38) by means of circuits of circulating liquid. Material from one or sever...  
JP2023180657A
An object of the present invention is to provide a technique that allows the state of white liquor to be ascertained as accurately as possible. [Solution] A white liquor treatment method in which the color tone of white liquor in pulp pr...  
JP2023523681A
A method, system, and apparatus comprising a computer program encoded on a computer storage medium for adjusting a high pressure feeder of a feeding system used in pulp production based on fluid leakage from a low pressure outlet of the ...  
JP7246326B2
A chip chute for transporting wood chips includes: first, second, third, and fourth planar lateral walls defining an open area having a rectangular cross-section, with an inlet opening configured to receive the wood chips, wherein the fi...  
JP2022130258A
To provide a paper and pulp manufacturing cost reduction method.A paper and pulp manufacturing process requires huge energy in a cooking process, and uses power of photovoltaic power generation in the required energy. By using the photov...  
JP6773658B2
This disclosure pertains to the use of black liquors from kraft pulp mills as a source of catalysts for the thermochemical conversion of organic matter feedstocks to bio oils. More particularly, some embodiments pertain to integrated kra...  
JP6534232B2
The invention relates to an improved profile bar screen for draining treatment liquor from a suspension of comminuted cellulose material and treatment liquor in an essentially cylindrical digester vessel. According to the invention is a ...  
JP6286819B2  
JP5789601B2
A feed system for a comminuted cellulosic material including: a chip bin having an upper chip inlet, an interior chamber oriented generally vertically and a lower discharge port; at least one liquor inlet to the chip bin to inject liquor...  
JP5786087B2  
JP2015040369A
To provide a liquid pressure-type drive assembly for an existing large-scale pressurization digestion tank and a method of installing the liquid pressure-type drive assembly.A liquid pressure-type drive assembly includes a stub shaft 32 ...  
JP5544490B2
An apparatus and process for pulp production are provided with which a pulp can be produced in an environment having the atmospheric pressure and having a temperature lower than in the kraft process and the sulfite process. The apparatus...  
JP5467161B2
A flash tank (10) including: a closed interior chamber (38); a gas exhaust port (17) coupled to an upper portion of the chamber (38); a liquid discharge port (19) coupled to a lower portion of the chamber (38); an inlet nozzle (34) attac...  
JP5467135B2
A screen plate for a cellulosic material puling vessel, the screen plate including: slots having curved inlet corner edges adjacent an inside surface of the screen plate and facing a pulp flow.  
JP5346493B2
A processing system for converting cellulosic material to pulp comprises a first pressurized reactor vessel (10) operating at a pressure above atmospheric pressure. The first reactor vessel (10) includes: a material input receiving cellu...  
JP5220391B2
A method for heating a chip slurry in a pulping system including an impregnation vessel and a chemical digesting vessel, the method including: impregnating chips in the impregnation vessel with a liquor; transporting the chips from the i...  
JP5178317B2
A reaction vessel (10) comprises: a material input receiving cellulosic material and a material discharge for the cellulosic material, wherein the cellulosic material flows through the reaction vessel (10) from the material input to the ...  
JP5174183B2
The digester screen is for a continuous digester in which cooked cellulose pulp is produced. The digester screen has a number of screen bars arranged vertically in the continuous digester that have withdrawal slots (S) between the fixed ...  
JP5139817B2
A screen plate for a cellulosic material puling vessel, the screen plate including: slots having curved inlet corner edges adjacent an inside surface of the screen plate and facing a pulp flow.  
JP5140405B2
The method involves separating free liquid from a cellulose tip through a top separator (20). The cellulose tip is arranged on a transfer circuit (11) that is arranged at a top part of a digestion apparatus (30). A collection space is fo...  
JP5130567B2  
JP5118483B2
A paper tissue and products made from paper tissue, such as paper handkerchiefs, facial tissues, bath and cosmetic tissues, paper tissue wipes of any kinds and the like. The invention also relates to tissue paper including deposits of lo...  
JP5108712B2
A method to chemically treat light weight, bulky cellulosic material including: introducing the material to an upper inlet of a substantially vertical treatment vessel; maintaining the material in the vessel at a pressure of at least 20 ...  
JP5081834B2
A dilution pipe (5a-5d) is connected to the ambient atmosphere (ATM) at one end and to the chip bin ventilation channel (2A, 2B) via a valve (4a-4d) at the other end. A control device (CPU) connected to a gas sensor (3) and the valve is ...  
JP5072452B2  
JP5067995B2
The invention relates to a method and a measurement device for measuring a suspension which contains wood fibers, the method comprising directing optical radiation at pulp and measuring optical radiation emitted by the pulp. The solution...  
JP5060421B2
Method and apparatus for minimizing adherence of lignin to an extraction screen in a semi-chemical pulping process. The method and apparatus generally relate to supplying white liquor and NaOH to as to increase the pH of cooking liquor a...  
JP5049980B2
The continuous digester system has an inlet defined therein for the feed of a chips suspension and an outlet for the output of a cooked suspension of pulp. The suspension of chips is fed in to the inlet through a line at the beginning of...  
JP4996937B2
A method for impregnating chips in a continuous digestion system with at least one impregnation vessel (101) and one digester (102). The digestion system comprises also a heat exchanger (107), which is arranged between a first return lin...  
JP4977086B2
Chemical pulp is produced from a slurry of comminuted cellulosic fibrous material using a beneficial additive such as AQ, or polysulfide. In the first treatment zone the effective alkali concentration and temperature conditions are such ...  
JP4951615B2
The method and arrangement is for the feed of a chips suspension from one vessel to a subsequent digester in a continuous cooking process for the production of chemical cellulose pulp. The vessel has an inlet defined therein for the inpu...  
JP4922706B2
The invention concerns an improved design for at least one of the cooling, dilution and washing at the bottom of a continuous digester for the production of cellulose pulp. By arranging at least one extra strainer section (30) above the ...  
JP4918707B2  
JP4898092B2
The method is for feeding a chips-slurry from a low-pressure to a high-pressure system during the continuous cooking of chemical cellulose pulp. The feed takes place through a sluice feeder 53 ' between these systems. The sluice feeder i...  
JP4886950B2
The invention relates to a process for continuous cooking of wood chips at elevated pressure and temperature in a vertical digester (1) for production of chemically dissolved pulp. Fibre material and cooking liquor are introduced at the ...  
JP4859953B2
A method for feeding a cellulosic fibrous material to a high pressure processing vessel including: pressurizing a low pressure flow of the fibrous material in a high pressure transfer device; discharging a high pressure flow of the fibro...  
JP4739518B2
A feeding system for feeding comminuted cellulose containing material and liquid to a continuously operating treatment vessel, which feeding sytem comprises a chute (2), operating at a first pressure level, with a liquid level and a leve...  
JP4681893B2
A procedure for the continuous cooking of chemical pulp, comprising an impregnation vessel 101 and a digester 102. The chips are impregnated in the impregnation vessel 101 and are fed after impregnation together with circulation fluid th...  
JP2011001677A
To provide a pulp production apparatus capable of producing the pulp from a raw material in a high concentration pulper, or the like and to provide the pulp production apparatus capable of producing the pulp using a palmae plant as the r...  
JP4604136B1
An apparatus and process for pulp production are provided with which a pulp can be produced in an environment having the atmospheric pressure and having a temperature lower than in the kraft process and the sulfite process. The apparatus...  
JP4505229B2
A method for the continuous cooking of chemical pulp with the aim of achieving improved heat economy in a digester system having a vessel ( 1 ) for impregnation and a vessel ( 2 ) for cooking the impregnated cellulose chips. A part of th...  
JP4488788B2
A method for converting a vapor phase continuous digester to a hydraulic digester including the steps of: operating the vapor phase digester in a vapor phase mode wherein a chip slurry enters the vessel of the digester through a lower ch...  

Matches 301 - 350 out of 760