Patents by Inventor Esko Tirronen
Esko Tirronen 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: 9580865Abstract: The invention relates to a method for dissolving cationic starch. In the method is obtained an aqueous polyelectrolyte solution comprising a synthetic cationic polymer, which has a charge density value of at least 0.1 meq/g, determined at pH3, the concentration of the cationic polymer in the polyelectrolyte solution being >2.5 weight-%, and the aqueous polyelectrolyte solution is brought together with cationic starch having a degree of substitution, DS, >0.1. The cationic starch is dissolved to the polyelectrolyte solution by heating and/or mixing. The invention relates also to a papermaking agent comprising 2-40 weight-% of synthetic cationic polymer which has a charge density value of at least 0.1 meq/g, determined at p H 3, and 2.5-25 weight-% cationic starch having degree of substitution, DS, >0.1. The papermaking agent is in slurry form and has a viscosity of 50-20 000 m Pas, measured at 25° C. with Brookfield DVI+ viscometer.Type: GrantFiled: March 22, 2013Date of Patent: February 28, 2017Assignee: Kemira OYJInventors: Asko Karppi, Esko Tirronen
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Patent number: 9290393Abstract: Processes for forming high iron content ferric chloride solutions, reconstituting ferric chloride solutions, and transporting the stable ferric chloride solutions with the high iron content are disclosed.Type: GrantFiled: November 30, 2011Date of Patent: March 22, 2016Assignee: KEMIRA OYJInventors: Krister Eskilsson, Stig Gunnarsson, Jeffrey Campbell, Jan Pavlicek, Faziollah Azarnoush, Esko Tirronen
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Patent number: 9073847Abstract: The present invention relates to a method and an arrangement for separation and recovery of at least one carboxylic acid and furfural from a dilute aqueous mixture thereof. In the method of the present invention a dilute aqueous mixture comprising at least one carboxylic acid and furfural is extracted with methyltetrahydrofurane, and at least one carboxylic acid and furfural are recovered. The arrangement of the present invention comprises an extraction unit 302 for carrying out extraction of at least one carboxylic acid and furfural from dilute aqueous mixture with methyltetrahydrofuran, connected to distillation unit 307 for carrying out distillation of the extract 305 from the extraction unit 302, and connected to acids distillation unit 320 for carrying out distillation of the bottom stream 308 from the distillation unit 307 to separate at least one carboxylic acid and furfural.Type: GrantFiled: November 2, 2012Date of Patent: July 7, 2015Assignee: TAMINCO FINLANDInventors: Esko Tirronen, Antero Laitinen, Jukka Hietala
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Patent number: 9024066Abstract: The present invention provides a method for purifying and recovering propionic acid from an aqueous mixture containing a fermentation product obtained from a fermentation process using glycerol as substrate, the method comprising optionally acidifying the aqueous mixture to a pH below 4.5, subjecting the aqueous mixture to an extraction with extracting agent containing a heavy extractant and optionally a light extractant as a diluent to obtain an extract comprising the extracting agent and organic acids, and a raffinate comprising water and any unreacted glycerol, and subjecting the extract to vacuum evaporation to separate propionic acid-containing organic acids from the extractant.Type: GrantFiled: November 26, 2012Date of Patent: May 5, 2015Assignee: Taminco FinlandInventors: Tom Granstrom, Juhana Ahola, Jukka Hietala, Esko Tirronen
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Publication number: 20150068697Abstract: The invention relates to a method for dissolving cationic starch. In the method is obtained an aqueous polyelectrolyte solution comprising a synthetic cationic polymer, which has a charge density value of at least 0.1 meq/g, determined at pH3, the concentration of the cationic polymer in the polyelectrolyte solution being >2.5 weight-%, and the aqueous polyelectrolyte solution is brought together with cationic starch having a degree of substitution, DS, >0.1. The cationic starch is dissolved to the polyelectrolyte solution by heating and/or mixing. The invention relates also to a papermaking agent comprising 2-40 weight-% of synthetic cationic polymer which has a charge density value of at least 0.1 meq/g, determined at p H 3, and 2.5-25 weight-% cationic starch having degree of substitution, DS, >0.1. The papermaking agent is in slurry form and has a viscosity of 50-20 000 m Pas, measured at 25° C. with Brookfield DVI+ viscometer.Type: ApplicationFiled: March 22, 2013Publication date: March 12, 2015Inventors: Asko Karppi, Esko Tirronen
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Publication number: 20140330039Abstract: The present invention provides a method for purifying and recovering propionic acid from an aqueous mixture containing a fermentation product obtained from a fermentation process using glycerol as substrate, the method comprising optionally acidifying the aqueous mixture to a pH below 4.5, subjecting the aqueous mixture to an extraction with extracting agent containing a heavy extractant and optionally a light extractant as a diluent to obtain an extract comprising the extracting agent and organic acids, and a raffinate comprising water and any unreacted glycerol, and subjecting the extract to vacuum evaporation to separate propionic acid-containing organic acids from the extractant.Type: ApplicationFiled: November 26, 2012Publication date: November 6, 2014Applicant: TAMINCO FINLANDInventors: Tom Granstrom, Juhana Ahola, Jukka Hietala, Esko Tirronen
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Publication number: 20140275581Abstract: The present invention relates to a method and an arrangement for separation and recovery of at least one carboxylic acid and furfural from a dilute aqueous mixture thereof. In the method of the present invention a dilute aqueous mixture comprising at least one carboxylic acid and furfural is extracted with methyltetrahydrofurane, and at least one carboxylic acid and furfural are recovered. The arrangement of the present invention comprises an extraction unit 302 for carrying out extraction of at least one carboxylic acid and furfural from dilute aqueous mixture with methyltetrahydrofuran, connected to distillation unit 307 for carrying out distillation of the extract 305 from the extraction unit 302, and connected to acids distillation unit 320 for carrying out distillation of the bottom stream 308 from the distillation unit 307 to separate at least one carboxylic acid and furfural.Type: ApplicationFiled: November 2, 2012Publication date: September 18, 2014Applicant: TAMINCO FINLANDInventors: Esko Tirronen, Antero Laitinen, Jukka Hietala
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Publication number: 20130331601Abstract: The present invention relates to a method and an arrangement for recovery of at least one organic acid from a dilute aqueous solution thereof. In this method a complex between said organic acid and an extractant is formed by contacting the solution with a reactive extractant and dissolving the formed complex into said extractant thus forming an extractant phase. The organic acid is removed from the formed complex by esterification using an alcohol.Type: ApplicationFiled: December 9, 2011Publication date: December 12, 2013Inventors: Esko Tirronen, Jukka Hietala, Reijo Aksela
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Publication number: 20130236379Abstract: Processes for forming high iron content ferric chloride solutions, reconstituting ferric chloride solutions, and transporting the stable ferric chloride solutions with the high iron content are disclosed.Type: ApplicationFiled: November 30, 2011Publication date: September 12, 2013Inventors: Krister Eskilsson, Stig Gunnarsson, Jeffrey Campbell, Jan Pavlicek, Faziollah Azarnoush, Esko Tirronen
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Patent number: 8492586Abstract: Processes for the recovery of formate salt from biomass and the product obtained thereof generally include subjecting an aqueous liquid mixture containing levulinic acid, formic acid and possibly furfural to a liquid-liquid extraction process, followed by the recovery of the furfural, the formate salt and the levulinic acid or the levulinate salt.Type: GrantFiled: April 21, 2009Date of Patent: July 23, 2013Assignee: Kemira OyjInventors: Jarmo Reunanen, Pekka Oinas, Timo Nissinen, Esko Tirronen
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Publication number: 20110098490Abstract: Processes for the recovery of formate salt from biomass and the product obtained thereof generally include subjecting an aqueous liquid mixture containing levulinic acid, formic acid and possibly furfural to a liquid-liquid extraction process, followed by the recovery of the furfural, the formate salt and the levulinic acid or the levulinate salt.Type: ApplicationFiled: April 21, 2009Publication date: April 28, 2011Applicant: KEMIRA OYJInventors: Jarmo Reunanen, Pekka Oinas, Timo Nissinen, Esko Tirronen
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Publication number: 20100062255Abstract: The invention relates to a gypsum product which consists of essentially intact crystals having a size of between 0.1 and below 2.0 ?m. The product is especially suitable as a coating pigment or filler in paper manufacture. The invention also relates to a process for the preparation of a gypsum product, wherein calcium sulphate hemihydrate and/or calcium sulphate anhydrite, water and a crystallization habit modifier are contacted so that the calcium sulphate hemihydrate and/or calcium sulphate anhydrite and the water are reacted with each other and form a crystalline gypsum product. The calcium sulphate hemihydrate and/or calcium sulphate anhydrite is/are used in such an amount that the reaction mixture formed from the calcium sulphate hemihydrate and/or calcium sulphate anhydrite, the water and the crystallization habit modifier has a dry matter content of between 50 and 84% by weight. Then, said gypsum product can be formed which consists of essentially intact crystals having a size of between 0.Type: ApplicationFiled: February 1, 2008Publication date: March 11, 2010Inventors: Reijo Aksela, Outi Gronfors, Pasi Hagelberg, Perttu Heiska, Hanna-Mari Kangaslahti, Jori Kerala, Jarmo Reunanen, Esko Tirronen, Tarja Turkki
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Patent number: 6429333Abstract: In a method for preparing formic acid, methyl formate is prepared with methanol as a reactant.Type: GrantFiled: June 19, 2001Date of Patent: August 6, 2002Assignee: Kemira Chemicals OyInventors: Kari Saari, Esko Tirronen, Antti Vuori, Marko Lahtinen