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WO/2018/211175A1 |
The present invention relates to a method of producing chemical pulp. The method comprises at least the following steps: a) wood chips or other comminuted lignocellulosic fibrous material is treated with a polysulfide-containing cooking ...
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WO/2018/201241A1 |
Methods and systems for controlling operation of a smelt dissolving tank receiving a flow of smelt and having a vent stack in fluid communication are provided. A dissolving liquid is injected into the smelt dissolving tank at a predeterm...
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WO/2018/146379A1 |
Determining a degree of breaking down of the fiber particles into fines in pulp is performed by transmitting (1000) optical radiation to the pulp (104); and determining (1002) the degree of breaking down of the fiber particles into fines...
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WO/2018/104490A1 |
The invention relates to a method for treating biomass (2). In a step (S10), biomass (2) and an impregnation liquid are fed into a first reactor unit (10) such that the biomass (2) is impregnated with the impregnation liquid while the bi...
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WO/2018/106169A1 |
The invention relates to a top separator for a treatment vessel for the manufacture of pulp from lignocellulosic material and comprises a housing, an interior casing arranged in the housing and having a bottom portion, a screen basket ar...
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WO/2018/104489A1 |
The invention relates to a method for impregnating biomass (10). In a step (S100) of the method, a reactor unit (11) is fed with biomass (10) by means of a plug screw (12). In another step (S200), the reactor unit (11) is at least partia...
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WO/2018/094493A1 |
The present invention refers to the separation of cellulose pulp into distinct fractions with different draining and morphological characteristics, as well as the use of part of these fractions for the production of nanocellulose. The pr...
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WO/2018/073491A1 |
A screen assembly for a digester, impregnation vessel or other treatment vessel for separation of cooking liquor or treatment liquor from lignocellulosic material, typically in a form of chips, in the production of chemical cellulose pul...
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WO/2018/041975A1 |
A hydrolysis of particulate lignocellulosic material with hydrochloric acid, characterized in that the hydrolysis is carried out in a hydrolysis reactor, which hydrolysis reactor comprises - a cylindrical body with a wall structure of fi...
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WO/2017/212111A1 |
The present invention relates to a method of producing chemical pulp at a con¬ tinuous digester plant. The method comprises the following steps: a) leading a slurry formed of comminuted cellulosic fibrous material and liquid into a dige...
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WO/2017/203329A1 |
The present invention discloses a cooking method and a digester system wherein partly digested cellulosic fiber source is compressed during cooking to provide high molecular weight lignin and pulp.
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WO/2017/204736A1 |
The invention relates to a method and an impregnation vessel where the bulk volume of impregnation liquor added is in form of hot black liquor having a residual alkali content. Hot black liquor is added in an upper central pipe supplying...
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WO/2017/171608A1 |
A screen feed arrangement for a pulp production process, comprising a discharge tank having an outlet, which is connected to an inlet of a discharge tank pump having an outlet, a dilution tank having an outlet, a screen feed pump having ...
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WO/2017/125287A1 |
A food or plant material extraction testing system, apparatus and method are disclosed. The system comprises a chamber with a first opening for allowing food or plant material to be added and a second opening for allowing material to be ...
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WO/2017/112834A1 |
A method of producing chemical cellulose pulp from sawdust utilizing a static down-flow retention vessel comprising the steps of continuously pressurizing a flow of sawdust using a progressive cavity pump to produce a pressurized sawdust...
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WO/2017/105618A1 |
A method for treating pulp through oxygen delignification and ozone bleaching is disclosed. The method uses a modified oxygen recovery unit which separates a mixture of oxygen and ozone thereby generating a stream of ozone and a stream o...
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WO/2017/099654A1 |
The invention relates to an improved treatment vessel screen (SC) for continuous treatment vessels. In order to obtain an easy cleaning of the withdrawal space behind screens in treatment vessels is the screen designed such that it may s...
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WO/2017/091138A1 |
The invention relates to an improved design of the bottom of a treatment vessel facilitating feed out of comminuted cellulosic material reducing the torque load on conventional bottom scrapers. The bottom of the treatment vessel has a co...
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WO/2017/086856A1 |
The invention relates to an improved method for generating steam in a digester plant of a chemical pulp mill. A mixture of alkaline cooking liquor and black liquor is before charge to the digester system heated in a reboiler producing bl...
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WO/2016/171604A1 |
A discharge valve (20) comprising a valve housing (21) which can be functionally connected to a process element (10) having a pressurized interior space. The valve housing (21) comprises a flow channel (22) having a longitudinal centre a...
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WO/2016/128223A1 |
It is disclosed a process to transfer a ligno-cellulosic feedstock from a low pressure zone to a high pressure zone. A slurry the ligno-cellulosic feedstock is first provided, which is then subjected to a multi-step liquid removal proces...
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WO/2016/128224A1 |
It is disclosed a process to transfer a ligno-cellulosic feedstock from a low pressure zone to a high pressure zone. A slurry the ligno-cellulosic feedstock is first provided, which is then subjected to a multi-step liquid removal proces...
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WO/2016/124121A1 |
A continuous horizontal stewing pot, comprising a cylindrical pressure pot body (1) capable of rotating by taking an own central axis as an axis. A charging apparatus (2) which is communicated with an inner cavity of the pot body and can...
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WO/2016/105270A1 |
According to the present invention, a feeding arrangement (20; 40) for feeding lignocellulosic biomass material such as annual plant material towards a hydrolysis process comprises at least one transportation device (24, 25; 41) for tran...
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WO/2016/087717A1 |
The present invention relates to a batch digester for treating comminuted lignocellulosic fibrous material. The digester comprises an inlet for introducing comminuted lignocellulosic fibrous material, a circular cylindrical wall portion,...
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WO/2016/085853A1 |
One embodiment provides an apparatus for cooking lignocellulosic material, comprising a pressurizable, inclined top separator including a sluicing liquor inlet for receiving a sluicing mixture comprising impregnated lignocellulosic mater...
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WO/2016/072919A1 |
The invention relates to an improved two vessel cooking system, wherein the first vessel is an atmospheric impregnation vessel and the second vessel is a pressurized digester, where hot black liquor is finally flashed off inside the impr...
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WO/2016/058098A1 |
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...
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WO/2016/055521A1 |
It is disclosed an inclined drainer for continuously draining a liquid from a slurried thermally treated ligno-cellulosic biomass stream moving in an axial flow direction. Said drainer comprises an external housing elongated in the axial...
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WO/2016/038251A1 |
The present invention relates to a method of heating a hydraulic digester, such as a single-vessel hydraulic digester, which has a top separator, a level of chips and a liquid phase above the level of chips. The method comprises at least...
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WO/2016/038247A1 |
The present invention relates to a method of generating steam at a digester plant of a chemical pulp mill. In the method, a) black liquor is discharged from the digester at a first temperature and first pressure; b) black liquor is treat...
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WO/2016/036299A1 |
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 ...
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WO/2016/036300A1 |
A plug screw feeder (1) comprises a plug screw (10) with a thread (12) and a plug screw housing (20) surrounding the plug screw. The plug screw housing comprises an inlet opening (24) in a side of the plug screw and in a vicinity of a fi...
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WO/2016/028244A1 |
The present invention relates to a delignification method (100) which is applied for removing lignin from a biomaterial mixture in form of a heap, and essentially comprises the steps of heaping the biomaterials (101), treating the heap w...
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WO/2016/000948A1 |
The present invention relates to a method of and an arrangement for introducing fiber suspension or pulp from a pulp vessel (10) to a washing and/or filtering apparatus (20). In accordance with an advantageous embodiment of the present i...
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WO/2015/199601A1 |
In an outlet flow control arrangement (1) arrangeable to control a flow of material through an outlet (2) with a predetermined diameter arranged at an end of a pressurized processing container (3), the outlet flow control arrangement (1)...
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WO/2015/178828A1 |
A feeding arrangement for feeding comminuted material to a treatment stage using a plug screw feeder. The invention relates to a design of the inlet to the plug screw feeder wherein, at least 2 chutes (20a,20b) are arranged to feed mater...
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WO/2015/172787A1 |
Methods and devices are provides for hydrothermal pretreatment of lignocellulosic biomass. A mechanically simple and inexpensive vertical steam reactor is fed with biomass feedstock from the top, while pretreated material is removed from...
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WO/2015/155642A1 |
The invention discloses a method of continuous cooking cellulose fibrous material in a digester, said digester having a top and a bottom. The method of the invention comprises the steps of: -feeding a slurry comprising cellulosic fibrous...
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WO/2015/132469A1 |
The present invention relates to a method of producing steam at a digester plant of a chemical pulp mill. Black liquor is discharged from the digester (17) at a first temperature and pressure. The black liquor is treated in a flash tank ...
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WO/2015/119771A1 |
The present method is directed to an on-site process for conveying an emulsion of one or more substantially water-free fluids or compositions to a brownstock washing process. This enables real-time adjustment of wash aids and other proce...
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WO/2015/037647A1 |
The purpose of the present invention is to provide a technique for appropriate management of the hydrolysis process during production of dissolving kraft pulp, and appropriate control of the dissolving kraft pulp production process. From...
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WO/2015/027042A1 |
A mobile processing unit may include a mobile platform assembly, and a fiber separation assembly supported on the mobile platform assembly. The fiber separation assembly may be configured to receive tropical plant stalks and at least par...
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WO/2015/014451A1 |
In order to recover steam when fibrous materials are being processed, wherein raw material to be processed, e.g., chips, is fed successively to a pre-steamer (1), a digester (4), a refiner (9) and through a blower line (6) to a dryer (7)...
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WO/2015/011275A1 |
The present invention relates to a process for obtaining cellulose or a mixture containing at least cellulose and at least lignocellulose from at least one substrate that is at least to some extent amenable to fermentation comprising at ...
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WO/2015/013146A1 |
The invention provides methods and compositions for measuring the formation of scale within a process system. The method involves measuring changes in the cell fouling as reflected on the refraction index measurements of a liquid medium ...
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WO/2014/184443A1 |
The present invention relates to a system and method for blow tanks and other tanks that temporarily hold pulp. The invention particularly relates to regulating the consistency of the material in such tanks. Pulp discharged from the tank...
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WO/2014/159887A1 |
Digestion of cellulosic biomass solids can be enhanced in the presence of a phenolic solvent. Methods for digesting cellulosic biomass solids can comprise providing cellulosic biomass solids containing up to about 50% water by mass in a ...
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WO/2014/159892A1 |
Digestion of cellulosic biomass solids can be enhanced in the presence of a phenolic solvent. Methods for digesting cellulosic biomass solids can comprise providing cellulosic biomass solids in a digestion medium comprising a phenolic so...
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WO/2014/159877A1 |
Digestion of cellulosic biomass solids can be enhanced in the presence of a phenolic solvent. Methods for digesting cellulosic biomass solids can comprise providing cellulosic biomass solids in a digestion medium comprising water and an ...
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