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WO/2019/129922A1 |
The invention relates to a method and a system for adjusting S/Na -balance of a sulphate pulp mill, wherein a pulp mill CNCG stream containing sulphur compounds is first scrubbed with an aqueous scrubbing solution containing an alkaline ...
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WO/2019/122510A1 |
A method for burning primary fuel (F1 ), wherein the primary fuel (F1 ) comprises at least a first compound containing nitrogen and a second compound comprising sulfur. The method comprises producing primary combustion gas (G1 ) having a...
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WO/2019/106069A1 |
The invention pertains to a method and system for washing pulp in a pulping process, wherein the pulp is washed in a pulp washer using aqueous wash liquor to obtain washed pulp and a wash filtrate comprising contaminants originating from...
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WO/2019/098899A1 |
The invention relates to a method for clarification of raw green liquor in a sedimentation tank. According to the invention is a part of dregs separated in the sedimentation tank recirculated back into the inflow of raw green liquor, and...
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WO/2019/077202A1 |
A method for removing hydrogen sulphide ions (HS-) from a liquor (300) of a pulp mill process, the method comprising pumping the liquor (300) to an injector arrangement (710) using a pump arrangement (720) such that the pumping of the li...
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WO/2019/074416A1 |
The invention relates to a feedwell (11; 31) for a clarifier, comprising a tubular portion (12; 32), a tangential inlet (19; 39) arranged in an upper part (13; 33) of the tubular portion (12; 32), and a conical portion (15; 35) having an...
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WO/2019/073144A1 |
The invention relates to a method for treating the ash from electrostatic filters originating from the boiler of a liquor recovery circuit in a Kraft process for producing paper pulp. According to the method of the invention, carbon diox...
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WO/2019/058032A1 |
The present invention related to a method to optimise the chemical balance at a sulfate pulp mill, which produces at least pulp bleached with chlorine dioxide and has a chlorine dioxide plant using at least chlorate, methanol and sulfuri...
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WO/2019/002553A1 |
The present invention provides a process for separating lignin from a lignocellulosic material in order to obtain cellulose free or substantially free of lignin, the process comprising the steps of (a) preparing a CO2-triggered switchabl...
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WO/2019/004076A1 |
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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WO/2018/236282A1 |
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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WO/2018/229334A1 |
An apparatus and method for cleaning smelt spouts of a recovery boiler. The invention further relates to an arrangement in the recovery boiler. The recovery boiler (1) comprises several smelt spouts (6) which are cleaned by means of moto...
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WO/2018/226147A1 |
The present invention describes a process for depolymerisation of lignin, said process comprising using at least one catalyst internal to a pulp mill for performing catalytic treatment and separation of biomass components into cellulose ...
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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/2018/197753A1 |
The present invention relates to a method of treating fly ash containing sodium sulfate from a recovery boiler of a chemical pulp mill. This method comprises at least the following steps: a) ash is dissolved in an aqueous solution and th...
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WO/2018/186795A1 |
The invention relates to an improvement in pressurized disc filters used for the filtering of causticization liquors containing lime mud particles. According to the inventive method and design, the liquor level in the vat of the disc fil...
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WO/2018/183498A1 |
Methods for production of yeast biomass and removal of sugar from red liquor by propagating yeast on sugars in red liquor byproduct of the sulfite pulping process are disclosed. Yeast are propagated using the sugars in red liquor as a ca...
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WO/2018/175135A1 |
The present technology is directed to fluff pulps with improved odor control as well as methods of making such fluff pulps. A fluff pulp is provided that includes a bleached kraft fiber and a copper ion content from about 0.2 ppm to abou...
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WO/2018/169459A1 |
A method of preparing a sizing boost additive, comprising the steps of I) combining a lignin oil and an aqueous solution of gelatinized cationic polysaccharide, and optionally water, to obtain a lignin/polysaccharide blend, wherein the l...
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WO/2018/147788A1 |
An apparatus (7) comprising a cleaning rod (38) driven in reciprocating, axial extension (y) and retraction (x) movements upon cleaning a smelt discharge opening (5) of a chemicals recovery boiler, wherein a linear actuator (33) is contr...
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WO/2018/146341A1 |
The invention relates to novel methods for processing lignocellulosic material. More specifically, the invention proves an integrated approach for processing cellulose to obtain paper and pulp and valorizing lignin to obtain value-added ...
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WO/2018/143880A1 |
The invention relates to a heat transfer tube (9) for falling film evaporation having a heating medium surface(21) to be heated by a heating medium,a falling film surface (20) to have spent liquor passing over it, and being made from an ...
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WO/2018/142025A1 |
According to an example aspect of the present invention, there is provided a process for the conversion of cellulosic waste material into a recycled cellulose product comprising the steps of cooking the waste material in a cooking liquor...
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WO/2018/143885A1 |
The invention relates to a heat transfer tube (9) for falling film evaporation having a heating medium surface (21 ) to be heated by a heating medium, a falling film surface (20) to have spent liquor passing over it, and being made from ...
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WO/2018/143886A1 |
The invention relates to a heat transfer tube (9) for falling film evaporation having a heating medium surface (21 ) to be heated by a heating medium, a falling film surface (20) to have spent liquor passing over it, and being made from ...
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WO/2018/114905A1 |
The invention relates to a two-stage digestion method for chemical fractionation of lignocellulose. In a first stage, the lignocellulose is pre-treated with water vapor or water at temperatures above 100 °C and increased pressures. In a...
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WO/2018/115592A1 |
According to an aspect of the present invention, there is provided a method of producing reactive lignin from an alkaline lignin containing stream, such as black liquor, e.g. kraft lignin,by using thermal treatment with temperatures betw...
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WO/2018/096181A1 |
The present invention relates to methods of processing compositions comprising a lignosulfonate and a carbohydrate, methods of preparing a carbohydrate-enriched composition involving the above processing method, associated carbohydrate-e...
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WO/2018/069168A1 |
The invention relates to a method for extracting cellulose, hemicellulose and lignin from lignocellulose. Said method can be carried out in an environmentally friendly manner when it comprises the following steps: step a) lignocellulose ...
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WO/2018/067055A1 |
A method and system for the treatment of sludge in a chemical pulp mill including a step of hydrothermal carbonization (HTC) of a sludge stream, wherein said sludge stream is fed into a HTC arrangement and subjected to elevated temperatu...
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WO/2018/046791A1 |
A system (100) for producing aqueous sulphuric acid. The system (100) comprises a first heat exchanger (410) configured to cool water and/or aqueous sulphuric for producing cooled water and/or cooled aqueous sulphuric acid; a pre-cooling...
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WO/2018/046482A1 |
A system (10) for treating spent pulping liquor (14) comprising lignin to provide green liquor (47) is disclosed. The system (10) comprises an evaporator (22), a recovery boiler (34), at least one filter (58, 74), and a green liquor plan...
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WO/2018/041488A1 |
The invention relates to a process for isolation of hemicelluloses from biomass pulping process waters or spent liquors with removal of suspended solids, concentration of the product and purification of the product by removal of inorgani...
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WO/2018/033146A1 |
A system for preparing a biomass monomer by means of microbial coculture. With biomass as a substrate, by means of process regulation and control by a special device, coculture of biomass degrading microbes and target product microbes is...
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WO/2018/005989A1 |
An anaerobic digestion system may include a material grinding/pulping portion, a hydrolysis portion arranged downstream of the grinding portion, a multiple chamber anaerobic reactor arranged downstream from the hydrolysis portion and inc...
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WO/2018/004427A1 |
The present invention relates to a method of producing lignin with reduced amount of odorous substances comprising the stepsof: i) providing a solid phase lignin containing starting material to be contacted with a water solution comprisi...
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WO/2017/222455A1 |
The present invention relates to a method of producing lignin with reduced amount of odorous substances comprising the step of: • providing asolid phaselignin containing starting material to be contacted with a water solution comprisin...
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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/2017/200470A1 |
The invention relates to an improved method for generating clean steam in a digester plant of a chemical pulp mill. By feeding a steam-to-steam converter (SSC) with venting steam from a black liquor flash tank (FT) as well as venting ste...
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WO/2017/191364A1 |
A method and a system for separating lignin from a lignin containing liquid medium. Lignin is precipitated from a lignin containing liquid medium, the method comprising: - adding a pH lowering agent to said lignin containing liquid mediu...
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WO/2017/178513A1 |
The present invention relates to a method for preparing monomers via depolymerisation from lignocellulose-containing biomass.
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WO/2017/178849A1 |
The present invention discloses the continuous process for production of cellulose pulp of very high whiteness from grass-like plant feedstock suitable for paper making. Process comprising the steps of: preparing the grass-like plant fee...
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WO/2017/175044A1 |
The present application discloses an alternative method for selective removal of K+ and Cl- from recovery boiler electrostatic precipitator ashes in a kraft-pulp process through the use of pure or impure CO2, complemented or not with a m...
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WO/2017/166854A1 |
A method for making a corrugated medium using brownstock pulp of straw, comprising: (I) beating brownstock pulp of straw, the freeness being controlled within 28-32 °SR, the wet weight being 3.2-3.8 g; (II) beating waste paper pulp, the...
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WO/2017/142445A1 |
A method for obtaining a strong hydrolysate from cellulose material after a hydrolysis in a batch digester. According to the invention is the cellulose material exposed to a 2-stage hydrolysis with a first steam phase hydrolysis followed...
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WO/2017/130127A1 |
The present invention relates to extraction of phytosterolsfrom alkaline tall oil soap which is obtained from the Kraft process black liquor by skimming.In the method according to the present invention, phytosterols are extracted using d...
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WO/2017/109468A1 |
A process is provided for preparing a low density, fibrous primary lignocellulose biomass, particularly straw for anaerobic digestion at large scale, i.e. >2 MWth, which comprises a step that greatly increasing the density of the straw t...
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WO/2017/103329A1 |
The present invention provides a method for producing parenchymal cell cellulose by using a high consistency alkali treatment and an optional refinement step, as well as an apparatus for its manufacture.
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WO/2017/093511A1 |
The present invention relates to a method for fractionating a lignocellulosic biomass. More specifically, the present invention lies in the field of cellulose solvent- and organic solvent- based lignocellulose fractionation (COSLIF) of l...
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WO/2017/095313A1 |
It is disclosed a process to produce a bio-product starting from a ligno-cellulosic feedstock, comprising a pre-hydrolysis step of the ligno-cellulosic feedstock in one or more pre- hydrolysis vessels to produce a liquid pre -hydrolyzate...
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