Patents by Inventor Kari Vanhatalo
Kari Vanhatalo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11617380Abstract: According to an example aspect of the present invention, there is provided an animal feed additive, which contains lignin-containing microcellulose, especially lignin-containing microcrystalline cellulose, for improving feed conversion rates of production animals, such as poultry.Type: GrantFiled: May 9, 2018Date of Patent: April 4, 2023Assignee: Nordic Bioproducts Group OyInventors: Kari Vanhatalo, Heikki Hannukainen, Asko Koskimäki, Olli Dahl
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Patent number: 11584804Abstract: A method for controlling discharges of nitrogen compounds in the production of cellulose carbamate (CCA). Microcrystalline cellulose is produced from chemical pulp produced at a pulp mill, such that the chemical pulp is subjected to acid hydrolysis at an elevated temperature to form microcrystalline cellulose (MCC) and hydrolysate, and the MCC is reacted with urea to produce cellulose carbamate whereby ammonia is released. The microcrystalline cellulose production and the cellulose carbamate production are integrated into the pulp mill having a flue gas system such that carbon dioxide from the flue gases is reacted with released ammonia to produce urea, which is used in the carbamate production.Type: GrantFiled: May 21, 2019Date of Patent: February 21, 2023Assignee: ANDRITZ OYInventors: Jukka Kantola, Hannu Råmark, Kyösti Valta, Kari Vanhatalo
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Publication number: 20230022830Abstract: A method for controlling discharges of nitrogen compounds in the production of cellulose carbamate (CCA). Dissolving pulp (DP) or kraft pulp is produced at a pulp mill, and the DP or kraft pulp is activated. The activated pulp is reacted with urea to produce cellulose carbamate whereby ammonia is released. The cellulose carbamate production is integrated into the pulp mill having a flue gas system such that carbon dioxide from the flue gases is reacted with released ammonia to produce urea, which is used in the carbamate production.Type: ApplicationFiled: November 13, 2020Publication date: January 26, 2023Inventors: Hannu RÅMARK, Kyösti VALTA, Kari VANHATALO
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Publication number: 20210206883Abstract: A method for controlling discharges of nitrogen compounds in the production of cellulose carbamate (CCA). Microcrystalline cellulose is produced from chemical pulp produced at a pulp mill, such that the chemical pulp is subjected to acid hydrolysis at an elevated temperature to form microcrystalline cellulose (MCC) and hydrolysate, and the MCC is reacted with urea to produce cellulose carbamate whereby ammonia is released. The microcrystalline cellulose production and the cellulose carbamate production are integrated into the pulp mill having a flue gas system such that carbon dioxide from the flue gases is reacted with released ammonia to produce urea, which is used in the carbamate production.Type: ApplicationFiled: May 21, 2019Publication date: July 8, 2021Inventors: Jukka KANTOLA, Hannu RÅMARK, Kyösti VALTA, Kari VANHATALO
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Publication number: 20210087299Abstract: A process for producing microcrystalline cellulose from fibrous cellulosic material by acid hydrolysis at an MCC plant. In this process a suspension of cellulosic pulp is thickened, so that filtrate is formed. A consistency of the thickened suspension is adjusted to 5-40% by adding dilution liquid, and the pH of the suspension is adjusted to a value of 4 or less with acid. The pulp suspension is subjected to acid hydrolysis of at least 120° C. in a reactor to produce a mixture of microcrystalline cellulose and hydrolysate. The mixture is discharged from the reactor to a lower pressure and lower temperature to flash the mixture and generate flash steam. Microcrystalline cellulose is separated from hydrolysate. The separated cellulose is washed in one or several washing apparatuses. The consistency of the microcrystalline cellulose is increased by thickening and/or drying for further processing.Type: ApplicationFiled: February 6, 2019Publication date: March 25, 2021Inventors: Hannu RÅMARK, Kari VANHATALO, Kari PELTONEN, Taina LINTUNEN
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Patent number: 10883226Abstract: The present invention relates to a method of producing microfibrillated cellu-lose (MFC) comprising (i) providing cellulosic material, (ii) drying the cellulosic material so that specific surface area (SSA), when measured with BET-method, is at most 10 m2/g, and (iii) subjecting the dried cellulosic material to mechanical treatment. The present invention additionally relates to microfibril-lated cellulose produced with the method of the present invention.Type: GrantFiled: December 22, 2016Date of Patent: January 5, 2021Assignee: Kemira OyjInventors: Kari Vanhatalo, Tom Lundin, Marcus Lillandt
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Publication number: 20200196632Abstract: According to an example aspect of the present invention, there is provided an animal feed additive, which contains lignin-containing microcellulose, especially lignin-containing microcrystalline cellulose, for improving feed conversion rates of production animals, such as poultry.Type: ApplicationFiled: May 9, 2018Publication date: June 25, 2020Inventors: Kari Vanhatalo, Heikki Hannukainen, Asko Koskimäki, Olli Dahl
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Patent number: 10358504Abstract: The present invention relates to a process for producing microcellulose comprising subjecting fibrous cellulosic material to acid hydrolysis at a temperature from 10° C. to less than 140° C. and at a consistency of at least 8% on dry weight of the cellulose, wherein the amount of added acid is from 0.2 to 2%, preferably from 0.3 to 1.9%, more preferably from 0.5 to 1.5% on dry weight of the cellulose.Type: GrantFiled: June 6, 2011Date of Patent: July 23, 2019Assignee: Kemira OYJInventors: Asko Karppi, Veli-Matti Vuorenpalo, Leif Robertsen, Kari Parviainen, Olli Dahl, Kari Vanhatalo
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Patent number: 10329359Abstract: The invention relates to a method for producing microfibrillated cellulose, where a suspension comprising cellulose derivative in a liquid phase which comprises an organic solvent is provided. The suspension of cellulose derivative is mechanically treated and microfibrillated cellulose is obtained. At least a part of the liquid phase from the microfibrillated cellulose is separated and microfibrillated cellulose with a dry solids content of >30 weight-% is obtained.Type: GrantFiled: October 29, 2015Date of Patent: June 25, 2019Assignee: Kemira OyjInventors: Marcus Lillandt, Veli-Matti Vuorenpalo, Kari Vanhatalo
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Patent number: 10273634Abstract: The invention relates to a strength agent for paper, board or the like. The strength agent comprises a first component, which is refined cellulosic fibers having a refining level of >70° SR, and a second component, which is a synthetic cationic polymer having a charge density of 0.1-2.5 meq/g, determined at pH 2.7, and an average molecular weight of >300 000 g/mol. The invention relates also to a use of the strength agent and to a method for increasing strength properties of paper, board or the like.Type: GrantFiled: August 18, 2015Date of Patent: April 30, 2019Assignee: Kemira OyjInventors: Matti Hietaniemi, Marcus Lillandt, Kari Vanhatalo, Asko Koskimäki
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Publication number: 20190040581Abstract: The present invention relates to a method of producing microfibrillated cellu-lose (MFC) comprising (i) providing cellulosic material, (ii) drying the cellulosic material so that specific surface area (SSA), when measured with BET-method, is at most 10 m2/g, and (iii) subjecting the dried cellulosic material to mechanical treatment. The present invention additionally relates to microfibril-lated cellulose produced with the method of the present invention.Type: ApplicationFiled: December 22, 2016Publication date: February 7, 2019Applicant: Kemira OyjInventors: Kari Vanhatalo, Tom Lundin, Marcus Lillandt
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Publication number: 20170313788Abstract: The invention relates to a method for producing microfibrillated cellulose, where a suspension comprising cellulose derivative in a liquid phase which comprises an organic solvent is provided. The suspension of cellulose derivative is mechanically treated and microfibrillated cellulose is obtained. At least a part of the liquid phase from the microfibrillated cellulose is separated and microfibrillated cellulose with a dry solids content of >30 weight-% is obtained.Type: ApplicationFiled: October 29, 2015Publication date: November 2, 2017Applicant: Kemira OyjInventors: Marcus Lillandt, Veli-Matti Vuorenpalo, Kari Vanhatalo
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Publication number: 20170268176Abstract: The invention relates to a strength agent for paper, board or the like. The strength agent comprises a first component, which is refined cellulosic fibres having a refining level of >70° SR, and a second component, which is a synthetic cationic polymer having a charge density of 0.1-2.5 meq/g, determined at pH 2.7, and an average molecular weight of >300 000 g/mol. The invention relates also to a use of the strength agent and to a method for increasing strength properties of paper, board or the like.Type: ApplicationFiled: August 18, 2015Publication date: September 21, 2017Applicant: Kemira OyjInventors: Matti Hietaniemi, Marcus Lillandt, Kari Vanhatalo, Asko Koskimäki
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Patent number: 9587038Abstract: The present invention relates to a process for producing microcellulose comprising a) acidifying fibrous cellulosic material, b) washing the acidified cellulosic material, c) optionally dewatering the washed cellulosic material, and d) hydrolyzing the washed or washed and dewatered cellulosic material under acidic conditions at a temperature of at least 120° C. and at a consistency of at least 8% on dry weight of the cellulose.Type: GrantFiled: June 6, 2011Date of Patent: March 7, 2017Assignee: Kemira OyjInventors: Erkki Iikka Sakari Rasanen, Leif Robertsen, Veli-Matti Vuorenpalo, Asko Karppi, Kari Parviainen, Olli Dahl, Kari Vanhatalo
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Patent number: 9469695Abstract: The present invention relates to a process for producing microcellulose comprising hydrolyzing fibrous cellulosic material with an acid at an elevated temperature or acidifying fibrous cellulosic material followed by washing and hydrolyzing the washed cellulosic material at an elevated temperature to produce a microcellulose-hydrolysate mixture followed by separation of the microcellulose from the hydrolysate, wherein the mixture or separated hydrolysate or microcellulose is optionally neutralized, and wherein the microcellulose production is integrated to production of a pulp mill such that at least part of chemicals used in the acidification, acid hydrolysis and/or neutralization is produced by an integrated chemical recovery process of the pulp mill.Type: GrantFiled: June 7, 2011Date of Patent: October 18, 2016Assignee: AALTO UNIVERSITY FOUNDATIONInventors: Olli Dahl, Kari Vanhatalo, Kari Parviainen
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Patent number: 9096692Abstract: The present invention relates to a process for producing microcellulose comprising subjecting fibrous cellulosic material to acid hydrolysis at a temperature of at least 40° C. and at a consistency of at least 8% on dry weight of the cellulose, wherein the amount of added acid is from 0.2 to 2%, preferably from 0.5 to 1.5% on dry weight of the cellulose.Type: GrantFiled: June 7, 2011Date of Patent: August 4, 2015Assignee: AALTO UNIVERSITY FOUNDATIONInventors: Olli Dahl, Kari Vanhatalo, Kari Parviainen, Mikael Svedman
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Publication number: 20150056362Abstract: The present invention concerns a fodder containing at least one type of grain crop, and a process for its manufacture, in which fodder the contents and identities of high-energy components have been optimized, whereby the main component in the fodder, in addition to the grain crop, is microcellulose, most suitably having a narrow particle size distribution, which microcellulose has been found to be digested in a particularly advantageous manner in the stomach of an animal, particularly the rumen of a ruminant, such as a cow.Type: ApplicationFiled: March 7, 2013Publication date: February 26, 2015Applicant: AALTO UNIVERSITY FOUNDATIONInventors: Kari Vanhatalo, Olli Dahl, Kari Parviainen
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Publication number: 20140179912Abstract: The present invention relates to a process for producing microcellulose comprising a) acidifying fibrous cellulosic material, b) washing the acidified cellulosic material, c) optionally dewatering the washed cellulosic material, and d) hydrolyzing the washed or washed and dewatered cellulosic material under acidic conditions at a temperature of at least 120° C. and at a consistency of at least 8% on dry weight of the cellulose.Type: ApplicationFiled: June 6, 2011Publication date: June 26, 2014Inventors: Erkki Iikka Sakari Rasanen, Leif Robertsen, Veli-Matti Vuorenpalo, Asko Karppi, Kari Parviainen, Olli Dahl, Kari Vanhatalo
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Publication number: 20130203981Abstract: The present invention relates to a process for producing microcellulose comprising hydrolyzing fibrous cellulosic material with an acid at an elevated temperature or acidifying fibrous cellulosic material followed by washing and hydrolyzing the washed cellulosic material at an elevated temperature to produce a microcellulose-hydrolysate mixture followed by separation of the microcellulose from the hydrolysate, wherein the mixture or separated hydrolysate or microcellulose is optionally neutralized, and wherein the microcellulose production is integrated to production of a pulp mill such that at least part of chemicals used in the acidification, acid hydrolysis and/or neutralization is produced by an integrated chemical recovery process of the pulp mill.Type: ApplicationFiled: June 7, 2011Publication date: August 8, 2013Inventors: Olli Dahl, Kari Vanhatalo, Kari Parviainen
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Publication number: 20130112193Abstract: The present invention relates to a process for producing microcellulose comprising subjecting fibrous cellulosic material to acid hydrolysis at a temperature from 10° C. to less than 140° C. and at a consistency of at least 8% on dry weight of the cellulose, wherein the amount of added acid is from 0.2 to 2%, preferably from 0.3 to 1.9%, more preferably from 0.5 to 1.5% on dry weight of the cellulose.Type: ApplicationFiled: June 6, 2011Publication date: May 9, 2013Inventors: Asko Karppi, Veli-Matti Vuorenpalo, Leif Robertsen, Kari Parviainen, Olli Dahl, Kari Vanhatalo