Patents by Inventor Reijo Aksela
Reijo Aksela 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: 11897984Abstract: Tagging agents, including fluorescent monomers, which may be polymerized. Anti-scalant polymer compositions that include a copolymer of a tagging agent and an anti-scalant monomer. Methods for synthesizing tagging agents, anti-scalant polymer compositions, and detecting an anti-scalant polymer composition.Type: GrantFiled: December 4, 2020Date of Patent: February 13, 2024Assignee: KEMIRA OYJInventors: Vesa Nuutinen, Erkki Johannes Metsälä, Reijo Aksela, Vesa Vuori, Mehrdad Hesampour
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Publication number: 20230114878Abstract: Tagging agents, including fluorescent monomers, which may be polymerized. Anti-scalant polymer compositions that include a copolymer of a tagging agent and an anti-scalant monomer. Methods for synthesizing tagging agents, anti-scalant polymer compositions, and detecting an anti-scalant polymer composition.Type: ApplicationFiled: December 4, 2020Publication date: April 13, 2023Inventors: Vesa NUUTINEN, Erkki Johannes METSÄLÄ, Reijo AKSELA, Vesa VUORI, Mehrdad HESAMPOUR
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Patent number: 11225456Abstract: The present invention relates to a process for in situ the preparation of mixtures of chelating agents by catalyzed reactions of diethanolamine derivatives with maleic acid and then with 2-halocarboxylic acid, to mixtures of chelating agents and methods using such chelating agents.Type: GrantFiled: June 27, 2018Date of Patent: January 18, 2022Assignee: Kemira OyjInventors: Reijo Aksela, Jonas Konn, Anna-Maija Perander, Anna Haarala, Riitta Ilmoniemi, Hanna Hoffren
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Publication number: 20200223786Abstract: The present invention relates to a process for the in situ preparation of mixtures of chelating agents by catalyzed reactions of diethanolamine with maleic acid and then with 2-halocarboxylic acid, mixtures obtainable using said process and mixtures of chelating agents. In addition, the invention relates to methods where such mixtures are used.Type: ApplicationFiled: June 27, 2018Publication date: July 16, 2020Applicant: Kemira OyjInventors: Reijo AKSELA, Jonas KONN, Anna-Maija PERANDER, Anna HAARALA, Riitta ILMONIEMI, Hanna HOFFREN
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Publication number: 20200181063Abstract: The present invention relates to a process for in situ the preparation of mixtures of chelating agents by catalyzed reactions of diethanolamine derivatives with maleic acid and then with 2-halocarboxylic acid, to mixtures of chelating agents and methods using such chelating agents.Type: ApplicationFiled: June 27, 2018Publication date: June 11, 2020Applicant: Kemira OyjInventors: Reijo AKSELA, Jonas KONN, Anna-Maija PERANDER, Anna HAARALA, Riitta ILMONIEMI, Hanna HOFFREN
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Patent number: 9090536Abstract: The present invention relates to a process for the preparation of a mixture of aspartic acid diethoxy succinate and an amino acid derivative of the general formula (I) wherein n is 1-10, m is 0 or 1, and R is hydrogen or an alkali metal or alkaline earth metal ion, comprising reacting maleate with diethanol amine under alkaline conditions in the presence of a lanthanoid catalyst to form aspartic acid diethoxy succinate followed by adding aspartic acid which reacts with unreacted maleate to form imino disuccinic acid, i.e. an amino acid derivative of formula (I) wherein m is 0, or by adding a diamine derivative of the general formula (II) NH2(CH2)nNH2 wherein n is as defined above, which reacts with unreacted maleate to form an amino acid derivative of formula (I) wherein m is 1 and n is as defined above.Type: GrantFiled: May 31, 2011Date of Patent: July 28, 2015Assignee: KEMIRA OYJInventors: Reijo Aksela, Jussi Rissanen
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Patent number: 9061276Abstract: The present invention relates to a method for recovering lanthanoid catalyst from the preparation of aspartic acid diethoxy succinate comprising contacting a carbonate source with a solution containing lanthanoid ions derived from said preparation and a chelating agent different from aspartic acid diethoxy succinate to precipitate lanthanoid carbonate followed by separating the precipitated lanthanoid carbonate from the solution.Type: GrantFiled: May 31, 2011Date of Patent: June 23, 2015Assignee: KEMIRA OYJInventors: Reijo Aksela, Jussi Rissanen
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Patent number: 9034977Abstract: The invention relates to a polymer product obtained by polymerization of i) at least one monomer selected from N-vinylformamide and vinyl acetate, and ii) maleic anhydride to give a copolymer comprising N-vinylformamide and/or vinyl acetate and maleic anhydride followed by hydrolyzing formamide groups originating from N-vinylformamide to amino groups and/or acetate groups originating from vinyl acetate to hydroxyl groups and acid anhydride to dicarboxylic acid groups to give a water-soluble copolymer comprising amine and/or hydroxyl and carboxyl groups, wherein the molar ratio of the N-vinylformamide and/or vinyl acetate monomer to the maleic anhydride monomer is from 70:30 to 30:70. The polymer product can be used as a dispersing agent or as a scale inhibiting agent.Type: GrantFiled: June 15, 2012Date of Patent: May 19, 2015Inventors: Rosa Carceller, Ari Juppo, Reijo Aksela
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Patent number: 8828910Abstract: The present invention relates to a process for the preparation of a solution comprising a first peroxy acid comprising performic acid and a second peroxy acid, said process comprising forming a carboxylic acid solution comprising a first carboxylic acid comprising formic acid, a second carboxylic acid and hydrogen peroxide, wherein the amount of formic acid is from 0.5 to 20% by weight of the amount of the second carboxylic acid, and allowing the components to react to form a solution comprising performic acid and said second peroxy acid, the amount of peroxy acids being at least 5% by weight. The invention also relates to a storable solution comprising performic acid and said second peroxy acid. The solution can be used as a disinfecting agent for controlling micro-organisms.Type: GrantFiled: September 13, 2006Date of Patent: September 9, 2014Assignee: Kemira OyjInventors: Reijo Aksela, Ilkka Renvall
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Publication number: 20140194564Abstract: The invention relates to a polymer product obtained by polymerization of i) at least one monomer selected from N-vinylformamide and vinyl acetate, and ii) maleic anhydride to give a copolymer comprising N-vinylformamide and/or vinyl acetate and maleic anhydride followed by hydrolyzing formamide groups originating from N-vinylformamide to amino groups and/or acetate groups originating from vinyl acetate to hydroxyl groups and acid anhydride to dicarboxylic acid groups to give a water-soluble copolymer comprising amine and/or hydroxyl and carboxyl groups, wherein the molar ratio of the N-vinylformamide and/or vinyl acetate monomer to the maleic anhydride monomer is from 70:30 to 30:70. The polymer product can be used as a dispersing agent or as a scale inhibiting agent.Type: ApplicationFiled: June 15, 2012Publication date: July 10, 2014Inventors: Rosa Carceller, Ari JUPPO, Reijo AKSELA
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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: 20130204035Abstract: The present invention relates to a process for the preparation of a mixture of aspartic acid diethoxy succinate and an amino acid derivative of the general formula (I) wherein n is 1-10, m is 0 or 1, and R is hydrogen or an alkali metal or alkaline earth metal ion, comprising reacting maleate with diethanol amine under alkaline conditions in the presence of a lanthanoid catalyst to form aspartic acid diethoxy succinate followed by adding aspartic acid which reacts with unreacted maleate to form imino disuccinic acid, i.e. an amino acid derivative of formula (I) wherein m is 0, or by adding a diamine derivative of the general formula (II) NH2(CH2)nNH2 wherein n is as defined above, which reacts with unreacted maleate to form an amino acid derivative of formula (I) wherein m is 1 and n is as defined above.Type: ApplicationFiled: May 30, 2011Publication date: August 8, 2013Applicant: Kemira OYJInventors: Reijo Aksela, Jussi Rissanen
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Publication number: 20130190526Abstract: The present invention relates to a method for recovering lanthanoid catalyst from the preparation of aspartic acid diethoxy succinate comprising contacting a carbonate source with a solution containing lanthanoid ions derived from said preparation and a chelating agent different from aspartic acid diethoxy succinate to precipitate lanthanoid carbonate followed by separating the precipitated lanthanoid carbonate from the solution.Type: ApplicationFiled: May 31, 2011Publication date: July 25, 2013Inventors: Reijo Aksela, Jussi Rissanen
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Patent number: 8066846Abstract: The invention relates to a stabilizing composition comprising following components (A) a polymer having the following formula: wherein R1 is a hydrogen atom or an alkyl group containing 1 to 12 carbon atoms, R2 is —COOM or —CH2COOM, M is a hydrogen atom, an alkali metal ion, an alkaline earth metal ion, an ammonium ion or a mixture thereof, n, m and k are molar ratios of corresponding monomers, wherein n is 0 to 0.95, m is 0.05 to 0.9, and k is 0 to 0.8, and (n+m+k) equals 1, and the weight average molecular weight is between 500 and 20,000,000 g/mol, (B) a chelating agent, (C) a poly-alpha-hydroxyacrylic acid or an alkaline salt thereof or the corresponding polylactone thereof, and (D) optionally a polycarboxylic acid polymer or an alkaline salt thereof. The invention also relates to a process for the treatment of a fiber material.Type: GrantFiled: January 31, 2008Date of Patent: November 29, 2011Assignee: Kemira OyjInventors: Aarto Parén, Jukka Jäkärä, Jukka Rautiainen, Reijo Aksela, Ilkka Renvall, Anna Ilomäki, Minna Sankari, Anna Sundquist, Heli Virkki, Hannu Hämäläinen
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Publication number: 20110263836Abstract: A method for treating lignin-containing fibrous material to reduce its susceptibility to yellowing generally includes enzymatically stabilizing the lignin of the material with an oxidizing agent capable of oxidizing phenolic or similar groups, which may undergo reactions conductive to the formation of colored sites on the fibers, and treating the material with a fluorescent whitening agent. Also disclosed are lignin-containing materials obtained by the method.Type: ApplicationFiled: April 17, 2009Publication date: October 27, 2011Applicant: KEMIRA OYJInventors: Veli-Matti Vuorenpalo, Jaakko Pere, Reijo Aksela, Andrei Tauber
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Publication number: 20100297460Abstract: According to the invention, wood material is treated with a composition comprising at least one C1-C7 monocarboxylic acid or a salt, or mixtures thereof, and at least one chelating agent. These compounds are dissolved in a liquid aqueous vehicle. In this manner, the treated wood is endowed with excellent resistance against detrimental environmental effects.Type: ApplicationFiled: December 3, 2008Publication date: November 25, 2010Applicant: KEMIRA OYJInventors: Jari-Jukka Kukkonen, Timo Nissinen, Reijo Aksela
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Publication number: 20100139875Abstract: The invention relates to a stabilizing composition comprising following components (A) a polymer having following formula wherein R1 is a hydrogen atom or an alkyl group containing 1 to 12 carbon atoms, R2 is —COOM or —CH2COOM, M is a hydrogen atom, an alkali metal ion, an alkaline earth metal ion, an ammonium ion or a mixture thereof, n, m and k are molar ratios of corresponding monomers, wherein n is 0 to 0.95, m is 0.05 to 0.9, and k is 0 to 0.8, and (n+m+k) equals 1, and the weight average molecular weight is between 500 and 20,000,000 g/mol, (B) a chelating agent, (C) a poly-alpha-hydroxyacrylic acid or an alkaline salt thereof or the corresponding polylactone thereof, and (D) optionally a polycarboxylic acid polymer or an alkaline salt thereof. The invention also relates to a process for the treatment of a fiber material.Type: ApplicationFiled: January 31, 2008Publication date: June 10, 2010Inventors: Aarto Paren, Jukka Jakara, Jukka Rautiainen, Reijo Aksela, Ilkka Renvall, Anna Ilomaki, Minna Sankari, Anna Sundquist, Hannu Hamalainen
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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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Publication number: 20100006245Abstract: The invention relates to a new pulp, which is derived from lignocellulosic material subjected to agitation in an aqueous tetra-alkylammonium salt solution under microwave irradiation. The invention relates also to a process for pulping lignocellulosic material and to a process for softening lignocellulosic material. The treated material is preferably wood, softwood or hardwood.Type: ApplicationFiled: November 10, 2006Publication date: January 14, 2010Inventors: Vesa Myllymaki, Reijo Aksela
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Publication number: 20090221704Abstract: The present invention relates to a process for the preparation of a solution comprising a first peroxy acid comprising performic acid and a second peroxy acid, said process comprising forming a carboxylic acid solution comprising a first carboxylic acid comprising formic acid, a second carboxylic acid and hydrogen peroxide, wherein the amount of formic acid is from 0.5 to 20% by weight of the amount of the second carboxylic acid, and allowing the components to react to form a solution comprising performic acid and said second peroxy acid, the amount of peroxy acids being at least 5% by weight. The invention also relates to a storable solution comprising performic acid and said second peroxy acid. The solution can be used as a disinfecting agent for controlling micro-organisms.Type: ApplicationFiled: September 13, 2006Publication date: September 3, 2009Applicant: KEMIRA OYJInventors: Reijo Aksela, Ilka Renvall