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WO/2024/091832A1 |
Compositions and methods for minimizing fouling and/or reducing the viscosity of black liquor in a Kraft pulping process are provided. An exemplary composition includes an anionic sulfate or sulfonate surfactant; an anionic sulfate or su...
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WO/2024/040677A1 |
A chemical alkali recovery treatment process for chemimechanical pulping waste liquid, comprising the following steps: adding a pretreatment reagent into the chemimechanical pulping waste liquid for a pretreatment reaction, and obtaining...
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WO/2024/037175A1 |
A biomass-based porous carbon composite material, preparation thereof, and a use thereof in CO2 adsorption. The biomass-based porous carbon composite material uses a pulping black liquor solid as a precursor, is obtained by means of arc-...
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WO/2023/234846A1 |
Embodiments herein relate to a heat recovery arrangement for heat recovery in a system 100 for calcination of lime mud. The heat recovery arrangement comprises: an inlet 402 for receiving incoming gas preheated by excess heat generated b...
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WO/2023/234845A1 |
Embodiments herein relate to a system 100 that for example may be used for calcination of lime mud. The system may comprise an input 102, a media separated heat exchanger 104, an injection arrangement 106, an electrically heated calcinat...
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WO/2023/234847A1 |
Embodiments herein relate to an injection arrangement 106 in a calcination system 100 that for example may be used for calcination of lime mud. The injection arrangement 106 comprises: an injector inlet 202 configured to receive preheate...
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WO/2023/199201A1 |
The present invention relates to a method for purifying lignin. The method comprises the steps of: providing alkaline black liquor; removing inorganic impurities from the black liquor to obtain purified black liquor; acidifying the purif...
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WO/2023/187259A1 |
A method is disclosed for treatment and utilization of green liquor dregs. The method comprises obtaining green liquor dregs originating from a pulp process. The green liquor dregs are dried at a temperature of 95 to 120 °C, preferably ...
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WO/2023/111009A1 |
A method of processing biomass by subjecting, in a digester (100), the biomass to bio-solvent and process control substance, which includes at least one inorganic substance determined as ash for intensifying formation of furfural; and se...
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WO/2023/099817A1 |
A sealing arrangement of a protruding bar of a boiler and a method for operating the sealing arrangement, wherein a protruding bar (1) is arranged to enter into a combustion chamber (3) of the boiler through an opening (5) of a wall (4) ...
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WO/2023/092027A1 |
Methods and systems for preparing agricultural residue or other agricultural feedstock for use as a pulp. The method includes providing non-wood agricultural residue (e.g., corn stover) or other agricultural feedstock that includes agric...
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WO/2023/091073A1 |
The present disclosure relates to colloidal dispersions comprising lignin. The colloidal dispersions comprise a first lignin, a second lignin and an aqueous liquid continuous phase. The colloidal dispersion has a dispersion pH. The first...
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WO/2023/089239A1 |
A process, and a system configured to perform the process, is provided wherein lignin is oxidized into methanol in an air stripping column by feeding into the air stripping column a feedstock containing lignin, and by oxidizing the ligni...
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WO/2023/086004A1 |
The present invention describes a method comprising providing a hydrothermally treated organic material and producing polyhydroxyalkanoates (PHAs) from the hydrothermally treated organic material.
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WO/2023/047423A1 |
The present disclosure relates to a process for treatment of biomass, specifically for pulping and biorefinery applications. The process relates to an organosolv process using high boiling organic solvents for the extraction of high mole...
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WO/2023/039024A1 |
A method for isolating lignin and synthesizing nanocellulose from lignocellulosic materials is provided. The method describes crushing and grinding the lignocellulosic material under pressure with a solid acid catalyst to induce a solid-...
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WO/2023/015325A1 |
The invention provides a system and method for obtaining lignin and carboxylic acid from a byproduct of a pulping process for digesting a source of lignin, such as the Kraft process or the soda pulping process. A spent liquor obtained fr...
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WO/2023/287340A1 |
The present invention describes a method intended for lignin recovery, said method comprising: a step of mixing a stream of black liquor with an acidic biomass stream for providing a mixed heterogenous stream; a step of separating the mi...
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WO/2023/277774A1 |
The present invention relates to separation of lignin from an aqueous slurry containing lignocellulosic biomass material comprising providing the aqueous slurry having an initial pH level to at least one precipitation phase for precipita...
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WO/2023/277776A1 |
The invention relates to separation of lignin from an aqueous slurry containing lignocellulosic biomass material, such as black liquor, comprising the steps of providing an aqueous slurry having an initial pH level to a first precipitati...
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WO/2023/274604A1 |
A method for processing a bark press water from sawmills and/or pulp mills is disclosed. According to the disclosure, the method comprises a) filtration of the bark press water to provide a bark press water filtrate having a particle siz...
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WO/2022/228973A1 |
The present invention relates to a mixing assembly for controlling mixing of green liquor and a flocculation agent, the mixing assembly comprising a mixing vessel (20) having a first end and a second end, a vessel inlet (21) for supplyin...
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WO/2022/231500A1 |
The present invention relates to a method for treating green liquor in a green liquor treatment arrangement, wherein the method comprises- adding (101) a flocculation agent to green liquor to form flocculated green liquor, - supplying (1...
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WO/2022/178391A1 |
A feedstock includes feedstock paper and non-paper material. The feedstock paper includes lignin and cellulose. A method includes cooking the feedstock in cooking liquor to dissolve at least a portion of the lignin from the feedstock pap...
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WO/2022/130753A1 |
The present invention provides a technology for more satisfactorily modifying dregs generated during green liquor treatment. The present invention can provide a dreg modifier containing a dispersant. The present invention can provide a...
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WO/2022/117391A1 |
The present invention relates to a process for producing a lignin composition, which process comprises: - providing a lignin slurry comprising water and a water miscible organic solvent; - subjecting the lignin slurry to extraction at an...
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WO/2022/106794A1 |
A method for transforming a black liquor, comprising the following steps: a) supplying a black liquor, b) gasifying the black liquor by means of supercritical water gasification in the presence of a hydrogenated carbon-free fuel, by mean...
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WO/2022/079347A1 |
A method for controlling a chemical recovery boiler (100). The method comprises treating spent liquor (102) in a furnace (105) of the chemical recovery boiler (100) to form a char bed (130) into the furnace, conveying smelt (140) from th...
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WO/2022/056208A1 |
A smelt shattering apparatus includes an inlet orifice, an outlet orifice, and a fluidic pathway between the inlet orifice and the outlet orifice. A convergence divergence zone is located between the inlet orifice and the outlet orifice....
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WO/2022/050883A1 |
System for producing cellulose pulp comprising a cooking device configured to digest wood chips to produce cellulose pulp, a screening arrangement configured to screen the cellulose pulp, a post-screening washing arrangement, an oxygen d...
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WO/2022/010395A1 |
A cooling shield (1) for a liquor injection pipe of a liquor gun for supplying liquor to a combustion chamber (34) of a recovery boiler. The cooling shield (1) has a first and a second side edge (3,4), the side edges extending in a longi...
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WO/2022/008791A1 |
The present invention discloses a cooking method and a digester system whereinpartly digested cellulosic fiber source is compressed during cooking to provide highmolecular weight xylan, high molecular weight lignin and pulp.
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WO/2022/008790A1 |
The present invention discloses a cooking method wherein partly digested wood based cellulosic raw materal is compressed during cooking to provide high molecular weightxylan, lignin and pulp.
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WO/2022/004065A1 |
Provided is a technique for more satisfactorily treating a green liquid. The present invention provides a green liquid treatment agent of which an active ingredient is a cationic polymer having no ester-bonded cationic group, green liq...
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WO/2022/004066A1 |
Provided is a technique with which the operation of a green liquid treatment can be easily managed. The present invention provides: a green liquid treatment method in which the color tone of a green liquid is monitored and a drug injec...
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WO/2021/255613A1 |
The present invention is directed to an improved method for recirculation of formic acid in a process for preparing dissolving pulp, in which sugars are extracted from pre-hydrolysis liquor.
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WO/2021/239651A1 |
A method for removing ammonia (NH3) from a gas produced in a pulp mill (100). The method comprises producing raw non-condensable gas comprising ammonia (NH3) in the pulp mill (100) and transferring at least some of the raw non-condensabl...
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WO/2021/242162A1 |
A method for managing and controlling nitrogen emission from a cyclic liquor flow system in a pulp mill (1), the pulp mill (1) comprising a recovery system (20) for recovering heat and chemicals from a pulping process (30), the recovery ...
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WO/2021/239647A1 |
The present disclosure generally relates to a method for controlled pretreatment of lignocellulosic biomass. The method comprises the steps of: Pretreating (S10) a lignocellulosic biomass material in a pretreatment arrangement, the pretr...
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WO/2021/243112A1 |
An assembly for cleaning a smelt spout includes a cleaning head, a drive rod connected with the cleaning head, and a pneumatic or other drive connected to selectively extend or retract the drive rod. The drive rod may be connected with t...
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WO/2021/232133A1 |
The present invention is related to a method for: reducing metals content in a Kraft pulping process comprising adding magnesium to a black liquor that is returned to the pulping operation; reducing aluminum content in a pulping process ...
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WO/2021/231360A1 |
Compositions and methods are provided for the recovery of minerals from mineral suspension, such as lime generated in Kraft pulping processes. More particularly, the composition comprises polyalkoxylate co-polymers, alkyleneamine alkoxyl...
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WO/2021/211654A1 |
A startup burner assembly for a recovery boiler, the startup burner assembly includes a housing having a burner end and a second end distal to the burner end; a main fuel conduit disposed within the housing; and high-pressure air conduit...
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WO/2021/198555A1 |
The invention relates to a method for the separation of lignin from an organic solvent, comprising multiple two-step cycles, wherein each two-step cycle comprises the steps of: adding an aqueous solution to a lignin-containing organic so...
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WO/2021/198556A1 |
The invention relates to a method of extracting extractives from a solid lignin fraction, comprising extracting a solid lignin fraction comprising extractives with an organic solvent to provide an organic extract containing the extractives.
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WO/2021/198558A1 |
A method of hydrolysis of cellulose esters, comprising providing a solution containing cellulose esters; adding a hydrotropic agent to the solution containing cellulose esters; performing hydrolysis of cellulose esters by adding an aqueo...
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WO/2021/194403A1 |
A method for production of fuel pellets or briquettes from surplus lignocellulose containing biomass of tree material used in a Kraft pulping process. The method comprises separating (21) the tree material into wood material and surplus ...
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WO/2021/186100A1 |
The invention relates to an air nozzle of a recovery boiler for feeding air required for the combustion process into the furnace of the boiler. The air nozzle according to the invention comprises a body (1) removably attached to the tube...
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WO/2021/178687A1 |
A chemical recovery boilers is described in which the primary air system is reconfigured to provide aggressive charbed control and improved combustion in the lower furnace. The fewest number of primary air ports are used on two opposing ...
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WO/2021/154143A1 |
The invention concerns a method for treatment of a stream of mixed compounds (4a) obtained from a process (3) comprising decomposition and/or conversion of a wood or pulp material, the method comprising: feeding the stream (4a-4e) throug...
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