Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 1 - 50 out of 2,496

Document Document Title
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...  
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....  
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...  
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...  
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.  
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.  
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...  
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...  
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.  
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...  
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 ...  
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...  
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...  
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 ...  
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...  
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...  
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...  
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.  
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...  
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 ...  
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...  
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 ...  
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...  
WO/2021/123501A1
The invention relates to a smelt spout of a recovery boiler for directing hot smelt material out from the inner part of the boiler. The smelt spout comprises as separate parts a body (2) and a replaceable wear part, i.e. an insert (6), c...  
WO/2021/123507A1
According to an example aspect of the present invention, there is provided a method of removing volatile compounds from a lignin-containing material, the method comprising: providing a material comprising lignin and volatile compounds; t...  
WO/2021/097270A1
A process for the production of cellulose, lignocellulosic sugars, lignosulfonate, and ethanol from lignocellulosic biomass. The process comprises steaming, pretreatment, chemical recovery, saccharification, and optionally fermentation. ...  
WO/2021/043671A1
The present invention relates to a process for manufacturing an upgraded bio-oil derived from black liquor, comprising the following steps: − Providing black liquor, which comes from the pulp and paper manufacturing industry; − Subje...  
WO/2021/041782A1
The invention herein disclosed and claimed is a process for refining fiber from lignocellulosic biomass. The process provides refined fiber and agriculturally amenable co-products, with a virtually waste-free systems design.  
WO/2021/040952A1
The disclosure provides methods and compositions for reducing the viscosity of black liquor. Also provided are methods of inhibiting deposition of scale and methods of processing black liquor. In some embodiments, the compositions includ...  
WO/2021/038126A1
A process for reducing phosphorus in effluents from a pulping process (1) is disclosed. The process comprises combining a plurality of acidic effluents (2, 2', 2'') obtainable from the pulping process into an acidic effluent stream (3); ...  
WO/2021/032913A1
The specification relates to a method and a system for adjusting pH of green liquor dregs. The method comprises contacting a slurry containing green liquor dregs (100, 200, 300, 400, 500) with flue gas (101, 201, 301, 401, 501). The syst...  
WO/2021/024025A1
An embodiment of the current invention provides a hopper for preparing empty fruit bunch (EFB) fibers in a paper and/or pulp production process. The hopper comprises an inlet, one or more pipes comprising holes and an outlet. The inlet o...  
WO/2020/260761A1
The invention enables automatic monitoring of smelt flow exiting a recovery boiler based on optical information. A processor is used to read at least one stationarily imaged video sequence, comprising digital image frames, comprising an ...  
WO/2020/260762A1
The invention enables determining one or more proportional particle group shares in flue gas of a recovery boiler (110) based on optical information gained from a flue gas sample. A processor (202) is used to read (301) a digital frame c...  
WO/2020/263153A1
The present invention relates to a method for extracting hemicellulose from lignocellulosic material, the method comprising: a) providing (11) lignocellulosic material in a digester, b) supplying (12) steam to the digester, c) performing...  
WO/2020/243805A1
The present invention relates to processes for extracting lignin from black liquor. In particular, processes for both extracting acidic lignin and extracting alkaline lignin from black liquor are disclosed, comprising: precipitating lign...  
WO/2020/236061A1
A method for extracting hydrolysate in a batch cooking process for producing pulp, said method comprising the steps of: - providing lignocellulose raw material to a batch cooking vessel; - performing acid hydrolysis of the lignocellulose...  
WO/2020/226559A1
A method for producing a low ash content biofuel mixture comprising tall oil pitch (TOP) and lignin for use as a renewable feedstock in a petroleum refinery. The method comprises the following steps: - providing a stream of purified TOP ...  
WO/2020/223829A1
The invention relates to a method for updating plants for treating effluents from pulp and paper production processes, wherein salts are removed from the effluent in order to reuse the water and recover chemicals. The process comprises: ...  
WO/2020/207766A1
The invention relates to a process (100, 101, 102) for recovering alkaline solution (1) from a waste liquor (2) contaminated with hemicelluloses (5), and to a method (200, 300) for treating (210, 310) a starting material (203, 303) that ...  
WO/2020/188412A1
An improved lime mud recycling system including a camera proximate the kiln outlet imaging the granular lime and providing outlet images of the granular lime exiting the kiln, a processor analyzing the outlet images of the granular lime ...  
WO/2020/186350A1
Processes and systems for treating Kraft pulping foul condensate are provided. The processes comprise removing volatile compounds from the foul condensate to produce a resulting condensate and removing methanol from the resulting condens...  
WO/2020/185154A1
The present invention relates to a heat recovery system10, 11, 12 for recovering heat from flue gas generated by combustion at a biomass plant installation. The heat recovery system10, 11, 12 comprises a flue gas cooler 200 configured to...  
WO/2020/165504A1
According to an example aspect of the present invention, there is provided a method of replacing with sodium make-up chemicals sodium losses caused by outflows in a pulp mill which employs a kraft process for producing cellulosic pulp, w...  
WO/2020/161323A1
The present invention relates to a process for producing bio-oil comprising depolymerized lignin and a unit for producing bio-oil.  
WO/2020/160955A1
The invention discloses an improved continuous process for production of cellulose from glass-like feedstock, which is based on: (i) cooking of comminuted grass-like feedstock in white liquor which contains 0.5-2.0% w/w NaOH and 0.5-25.0...  
WO/2020/161313A1
The present invention relates to a process for producing bio-oil comprising depolymerized lignin using a rosin-containing oil.  
WO/2020/161397A1
The invention is directed to a method for producing a purified lignin salt from alkaline spent liquor from the chemical cooking of lignocellulosic raw materials. The method comprises the steps of decreasing the spent liquor pH to form a ...  
WO/2020/159735A1
A method is provided for controlling airflow into a furnace that employs a velocity type damper. In one embodiment, the method for controlling airflow may include engaging a velocity type damper to an air port opening of a furnace. The v...  
WO/2020/157385A1
The invention concerns a method for precipitating organic pollutants from aqueous liquids used in process stages for bleaching or de-lignifying pulp in a pulp mill. The method comprises the steps of adjusting the pH of an acid aqueous li...  

Matches 1 - 50 out of 2,496