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8778135 Circular utilization method in pulping and papermaking processes with straw  
A circular utilization method in pulping and papermaking processes with straw Primary pulp is obtained by digesting straw raw material according to the ammonium sulfite method. Concentrated black...
8721837 Method for recovering pulping chemicals and reducing the concentration of potassium and chloride therein  
In a digester, wood chips and white liquor are combined and cooked under pressure to pulp the wood. This produces black liquor which is concentrated and burned in a recovery boiler. The recovery...
8703079 Method for treating lime mud  
A method for feeding lime mud into a lime kiln including a rotary kiln shell having an interior between a first end wall and a second end wall, the method including: feeding the lime mud into a...
8668806 Product and processes from an integrated forest biorefinery  
An omnibus process of pulping and bleaching lignocellulosic materials in which a charge of a lignocellulosic material is biopulped and/or water extracted prior to pulping and bleaching. The...
8662316 Filter medium for liquid filtration and process for producing the same  
A filter medium for liquid filtration of fine texture exhibiting high strength when wetted with water, which filter medium is comprised of a wet-laid nonwoven fabric. There is provided a filter...
8617354 Shaped cellulose manufacturing process combined with a pulp mill recovery system  
Provided is a process for manufacturing shaped cellulose materials from lignocellulose where a dissolving grade pulp is manufactured and dissolved in an aqueous alkaline or acidic solvent system...
8518273 Method and device for cleaning of filter  
The method and arrangement is for cleaning at least one of filter sheets and filter cakes in a pressurized white liquor filter with spray nozzles and driving fluid. The white liquor filter is used...
8372494 Inkjet print media  
An inkjet print medium includes a base substrate, a layer of a deinking solution at least partially diffused into the base substrate, and an ink-receiving layer established on the layer of the...
8246779 Maintenance of sulfur concentration in Kraft pulp processes  
Methods and apparatus for maintaining sulfur concentration in the chemical recovery cycle of a Kraft pulping process. A portion of the recovery boiler ash is dissolved, treated to remove solids,...
7988820 Method for cleaning and/or cooling a liquor gun in a chemical recovery boiler  
An apparatus for cleaning and cooling a liquor nozzle, the nozzle including at least a liquor tube for feeding liquor and chemicals into a furnace of a recovery boiler. The apparatus includes an...
7806127 Smelt spout enclosure for chemical recovery boilers  
An enclosure for a smelt spout of a chemical recovery boiler comprises a skirt having a central region through which smelt flowing from the smelt spout falls into a dissolving tank. The central...
RE41552 Composition for the production of improved pulp  
Compositions and method for improving properties of pulp produced or reducing the digester cycle time in alkaline chemical pulping processes in which an effective amount of at least one selected...
7713422 Black liquor treatment method  
Lignin and alkali are efficiently sorted out of alkaline black liquor discharged from the paper manufacturing/pulp and paper manufacturing industries and the treated water is made as purified...
7604711 Method to optimize temperature profiles displacement batch cooking  
Method and apparatus for batch displacement digester systems to increase tank farm vessel temperatures for more efficient delignification rates by mitigating the formation of flow channels in the...
7468176 Feeding device and process and feeding system which utilize the feeding device  
Feeding device for feeding burned lime to a reaction vessel for causticizing soda liquor to caustic soda. The feeding device, in its upper part, has an inlet for receiving slurry of the burned...
7465372 Method for treatment of spent liquor  
Method for treatment of spent liquor at a pulp mill, in which method at least a part of the spent liquor flow arriving from the evaporation plant is taken to a pyrolysis reactor, wherein it is...
7371307 Kraft pulp yield by heat treatment of polysulphide liquors generated by oxidation  
Oxidized white liquor is heat treated to increase the concentration of polysulphide measured at 285 or 286 nm (PSUV) or measured at 416 nm (PSVIS) and the PSUV/PSGR or PSVIS/PSGR ratio, whereby...
7294225 Process for production of synthesis gas in combination with the maintenance of the energy balance for a pulp mill  
A process (44) for the production of pulp and paper (28), recycling of cooking chemicals (3, 29), combustion of biomass (30, 37) and generation of heat and electric energy (27, 40) comprising a...
7270726 Method for the production of green liquor  
The method is for production of green liquor in association with a causticizing process during recovery of chemicals in manufacture of sulphate pulp. A smelt (14) of chemicals principally...
7231714 Corrosion-resistant exterior alloy for composite tubes  
An austenitic Ni—Cr—Fe alloy is provided as an exterior tube material for improved cracking and corrosion resistance of composite tubes used to construct the lower furnace section of kraft...
7172677 Method for inhibiting calcium salt scale  
Compositions and method for improving inhibition of calcium salt scale formation under the conditions found in chemical pulp processes in which an effective amount of selected phosphonates or...
7097739 Method for the production of improved pulp  
Compositions and method for improving properties of pulp produced or reducing the digester cycle time in alkaline chemical pulping processes in which an effective amount of at least one selected...
6890404 Composition for the production of improved pulp  
Compositions and method for improving properties of pulp produced or reducing the digester cycle time in alkaline chemical pulping processes in which an effective amount of at least one selected...
6887345 Process and device for evaporating liquids, for example black liquor from cellulose cooking, which contain solid and dissolved substances  
The present invention relates to a process and a device for evaporating liquids, for example black liquor from cellulose cooking, which contain solid and dissolved substances which are to be...
6875414 Polysulfide measurement methods using colormetric techniques  
Methods of converting a sulfide in a composition to polysulfide are described, one method comprising the steps of exposing the composition to conditions and for a time sufficient to cause...
6869503 Composition for inhibiting calcium salt scale  
Compositions and method of improving inhibition of calcium salt scale formation under the conditions found in chemical pulp processes in which an effective amount of selected phosphonates or...
6821384 Process for the treatment of fly ash, using hydrochloric acid  
The invention relates to a process for the treatment of fly ash accumulating in the electro-filter of the soda recovery unit in a sulfate cellulose mill, the ash containing primarily Na sulfate,...
6797125 Method of treating condensates  
The present invention relates to a method of treating condensates containing compounds, which are more volatile than water, in an evaporation plant, where liquid, such as effluent liquid from a...
6790313 Method of cleaning sulfide contaminated condensates  
A method to remove sulfides and other volatile contaminants from liquor vapor condensate in a pulp manufacturing process, where the mentioned liquor vapor condensate is fed into a stripper, which...
6719879 Method for kraft waste reclamation  
A method for obtaining particulate calcium carbonate having an average particle size less than about 12 microns is provided. The method includes the steps of (1) withdrawing from a pulp mill a...
6691358 Oxidized white liquor in an oxygen delignification process  
The invention refers to a method for an integrated treatment of cellulose pulp. The method includes the steps: providing said cellulose pulp (1), providing a determined quantity of white liquor...
6632327 Process for treating spent, waste, alkaline digestion liquor from paper pulping operations and product  
A water soluble, surface active, polymeric agent is mixed with digestion liquor, preferably with an additional surface active defoamer coagulant agent prior to or during acidification of the...
6627784 Highly efficient method of mixing dissimilar fluids using mechanically induced cavitation  
A method of mixing two or more dissimilar fluids such a gas and a liquid is provided. The method includes the steps of introducing one fluid into the other to form a mixture, inducing cavitation...
6578529 Arrangement for feeding black liquor into a recovery boiler  
The present invention relates to an arrangement for introducing black liquor into a furnace of a recovery boiler, said arrangement comprising an elongated tube having an interior surface and an...
6511578 Bleaching and delignifying cellulosic pulp using caroate/caro's acid solution  
The invention relates to a method of bleaching and/or delignifying cellulose, in which (a) a sodium hydroxide solution and a peroxydisulphate solution are first of all produced by electrolysis of...
6503369 Process for producing cellulose and fertilizer by-product  
The invention relates to a process for producing cellulose and a fertilizer by-product by using a closed cycle of cooking chemicals and process waters. In the process of the invention, the pulp is...
6451164 Alkyleneamine composition for enhancing lime mud dewatering  
A process for de-watering lime mud in a Krafft pulping process is described. The process includes an improvement which comprises adding an effective water-removal rate enhancing amount of an...
6425976 Method for black liquor gasification in recovery boilers  
The invention refers to a method for black liquor gasification in recovery boilers, of the type having a lower portion, referred to as a lower furnace and an upper portion, referred to as an upper...
6319358 Electrolytic causticizing of smelt from a kraft recovery furnace  
An electrochemical process is provided for treatment of molten kraft smelt produced from black liquor in a kraft recovery boiler. Treated smelt can be contacted with water to produce white liquor...
6312560 Use of alkyleneamines for enhancing lime mud dewatering  
A process for dewatering lime mud in a kraft pulping process is described. The process includes an improvement which comprises adding an effective amount of an alkyleneamine to the lime mud prior...
6261411 Process for kraft chemical recovery  
A method of recovering chemicals from spent black liquor used in a kraft pulping process comprising organic materials having oxygen containing functional groups, the method comprising heating the...
6183598 Process for recovering alkali and black liquor containing silicatae  
The invention relates to a process for recovering alkali and heat from a black liquor (5) containing silicate from a soda cook of e.g. grass, reed, straw and bagasse. In the process the black...
6168685 Process FOR oxidation of concentrated black liquor  
Concentrated black liquor formed in a kraft pulp mill process is treated to effect exothermal oxidation of black liquor solids, so as to heat the concentrated black liquor and consume a proportion...
6136144 Method of removing sulfur from a process gas stream using a packed bed calcinator  
The present invention reduces the sulfur and odor emissions from a paper-making Kraft process by recovering the sulfur in the non-combustible gases (NGCs) emitted by the Kraft process. In a first...
6132555 Method and arrangement for increasing evaporation capacity of a multi-stage evaporator of spent liquor in a pulp mill  
A method and arrangement for increasing evaporation capacity in a multi-stage evaporation plant of spent liquor of a pulp mill. The method includes increasing the pressure of vapor discharged from...
6113739 Process for washing gas formed by gasifying black liquor  
Process for recovering chemicals and energy from black liquor, where the black liquor is gasified with CO, CO2, CH4, H2, and H2 S, in gaseous form, and Na2 CO3, NaOH and Na2 S, in the form of...
6059925 Method to regenerate gas mixture in ozone-bleaching process  
A method of treating cellulose pulp which is subjected to an oxygen-delignification stage (3), a washing stage (4), an ozone-bleaching stage (1) and a further bleaching stage, for instance a...
6030493 Process for recovering chemicals and energy from cellulose spent liquor using multiple gasifiers  
Provided is a process for recovering chemicals and energy from spent liquor obtained when producing paper pulp by chemical delignificatation of fibrous raw material. The spent liquor is gasified...
6027609 Pulp-mill recovery installation for recovering chemicals and energy from cellulose spent liquor using multiple gasifiers  
A Pulp Mill Recovery installation for producing liquors containing different concentrations of recovered process chemicals or combustion gasses containing different concentrations of process...
5993601 Process for producing polysulphide by means of oxidizing sulphide in spent liquors from kraft cellulose cooking  
The invention relates to a process for producing polysulphide by means of oxidizing sulphide in spent liquors from kraft cellulose cooking. The process is characterized in that green liquor is...

Matches 1 - 50 out of 291 1 2 3 4 5 6 >