Patents by Inventor Erkki Paatero
Erkki Paatero 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: 10689728Abstract: The present disclosure relates to hydrometallurgical technologies wherein liquid-liquid extraction, also called solvent extraction, is used to separate and concentrate metal ions. Exemplary embodiments relate to solvent extraction of copper and a diluent useful in copper solvent extraction. A bio-based composition can fulfil physico-chemical properties that are desired for solvent extraction. Moreover, a composition is disclosed, which in addition to providing more environmental friendly alternative, can also improve the solvent extraction process of copper.Type: GrantFiled: July 4, 2017Date of Patent: June 23, 2020Assignees: OUTOTEC (FINLAND) OY, NESTE CORPORATIONInventors: Erkki Paatero, Rami Saario, Jukka Kortelainen, Maija Rouhiainen, Virpi Rämö
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Patent number: 10662499Abstract: The invention relates to a method for regenerating the extractive potential of an organic hydroxyoxime-based extraction solution used in the recovery of metals by liquid-liquid extraction. The method is two-stage, in which a solid hydroxylamine is used in the reaction stage, and the removal of the undesirable compounds generated in the reaction occurs in the second stage by adsorption purification. The method of the invention is suitable for treatment of degraded oxime metal extractants in various process organic solutions both in aldehyde and ketoxime extractant solutions. The method can also be used to treat a mixture of degraded oxime extractants.Type: GrantFiled: March 18, 2016Date of Patent: May 26, 2020Assignee: OUTOTEC (FINLAND) OYInventors: James Kabugo, Erkki Paatero
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Publication number: 20190249273Abstract: The present disclosure relates to hydrometallurgical technologies wherein liquid-liquid extraction, also called solvent extraction, is used to separate and concentrate metal ions. Exemplary embodiments relate to solvent extraction of copper and a diluent useful in copper solvent extraction. A bio-based composition can fulfil physico-chemical properties that are desired for solvent extraction. Moreover, a composition is disclosed, which in addition to providing more environmental friendly alternative, can also improve the solvent extraction process of copper.Type: ApplicationFiled: July 4, 2017Publication date: August 15, 2019Applicants: OUTOTEC (FINLAND) OY, NESTE CORPORATIONInventors: Erkki Paatero, Rami Saario, Jukka Kortelainen, Maija Rouhiainen, Virpi Rämö
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Patent number: 10221493Abstract: The present invention provides a method of recovering copper and zinc from an aqueous sulfate and chloride containing solution. In the first process step zinc and copper are simultaneous extracting with an extraction solution comprising a liquid chelating cation exchanger and a liquid anion exchanger. The extraction is followed by consecutive stripping stages. First the anionic species are washed from the organic phase with one or more aqueous solutions and finally the copper is stripped with an aqueous acidic solution.Type: GrantFiled: January 21, 2015Date of Patent: March 5, 2019Assignee: OUTOTEC (FINLAND) OYInventors: Erkki Paatero, Kari Hietala, Mika Haapalainen
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Patent number: 10060007Abstract: The invention relates to a method for preparing a gold-containing solution by chloride leaching from gold-bearing raw materials. A further object of the invention is to provide a method for recovering gold and optionally silver from the prepared gold-containing solution. The invention relates also to a process arrangement for recovering gold and optionally silver.Type: GrantFiled: April 29, 2014Date of Patent: August 28, 2018Assignee: Outotec (Finland) OyInventors: Ville Miettinen, Riina Ahtiainen, Kari Valkama, Erkki Paatero, Kari Hietala, Mika Haapalainen
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Publication number: 20180073099Abstract: The invention relates to a method for regenerating the extractive potential of an organic hydroxyoxime-based extraction solution used in the recovery of metals by liquid-liquid extraction. The method is two-stage, in which a solid hydroxylamine is used in the reaction stage, and the removal of the undesirable compounds generated in the reaction occurs in the second stage by adsorption purification. The method of the invention is suitable for treatment of degraded oxime metal extractants in various process organic solutions both in aldehyde and ketoxime extractant solutions. The method can also be used to treat a mixture of degraded oxime extractants.Type: ApplicationFiled: March 18, 2016Publication date: March 15, 2018Applicant: OUTOTEC (FINLAND) OYInventors: James KABUGO, Erkki PAATERO
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Publication number: 20160369417Abstract: The present invention provides a method of recovering copper and zinc from an aqueous sulfate and chloride containing solution. In the first process step zinc and copper are simultaneous extracting with an extraction solution comprising a liquid chelating cation exchanger and a liquid anion exchanger. The extraction is followed by consecutive stripping stages. First the anionic species are washed from the organic phase with one or more aqueous solutions and finally the copper is stripped with an aqueous acidic solution.Type: ApplicationFiled: January 21, 2015Publication date: December 22, 2016Applicant: OUTOTEC (FINLAND) OYInventors: Erkki PAATERO, Kari HIETALA, Mika HAAPALAINEN
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Publication number: 20160068927Abstract: The invention relates to a method for preparing a gold-containing solution by chloride leaching from gold-bearing raw materials. A further object of the invention is to provide a method for recovering gold and optionally silver from the prepared gold-containing solution. The invention relates also to a process arrangement for recovering gold and optionally silver.Type: ApplicationFiled: April 29, 2014Publication date: March 10, 2016Applicant: OUTOTEC (FINLAND) OYInventors: Ville MIETTINEN, Riina AHTIAINEN, Kari VALKAMA, Erkki PAATERO, Kari HIETALA, Mika HAAPALAINEN
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Publication number: 20150144540Abstract: A method and apparatus for restoring the extractive potential of organic hydroxyoxime-based extraction solution used in the recovery of metals by liquid-liquid extraction are provided. The method is two-stage, in which an aqueous solution of hydroxylamine or some hydroxylamine compound is used in the reaction stage, and the removal of the undesirable compounds generated in the reaction occurs in the second stage by adsorption purification. The reaction stage and the adsorptive stage are carried out in a mixing tank.Type: ApplicationFiled: February 2, 2015Publication date: May 28, 2015Applicant: OUTOTEC (Finland) OyInventors: Erkki Paatero, Kai Jyrkkä, Sami Virolainen
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Patent number: 8974673Abstract: The invention relates to a method and apparatus for restoring the extractive potential of organic hydroxyoxime-based extraction solution used in the recovery of metals by liquid-liquid extraction. The method is two-stage, in which an aqueous solution of hydroxylamine or some hydroxylamine compound is used in the reaction stage, and the removal of the undesirable compounds generated in the reaction occurs in the second stage by adsorption purification. The reaction stage and the adsorptive stage are carried out in a mixing tank.Type: GrantFiled: May 26, 2010Date of Patent: March 10, 2015Assignee: Outotec OyjInventors: Erkki Paatero, Kai Jyrkkä, Sami Virolainen
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Patent number: 8961795Abstract: The invention relates to an apparatus and method for removing molybdenum and other possible impurities from an organic copper-containing extraction solution in connection with the liquid-liquid extraction related to copper recovery. The removal of impurities occurs in one or several removal units built into the organic extraction solution storage tank.Type: GrantFiled: March 25, 2010Date of Patent: February 24, 2015Assignee: Outotec OyjInventors: Hannu Laitala, Erkki Paatero, Bror Nyman, Eero Ekman
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Patent number: 8926924Abstract: A method for the selective recovery of uranium from a sulphate-based acidic aqueous solution of uranium containing iron and other metals by means of solvent extraction, in which the extractant used in the organic extraction solution is bis(2-ethylhexyl) phosphate and a liquid branched trialkyl phosphine oxide is the modifying agent. It is typical of the method that the uranium concentration in the feed solution is less than 50 mg/l and a reducing agent is introduced into the aqueous and/or extraction solution to prevent the permanent oxidation of iron to trivalent. In the method the majority of the extraction solution is circulated in a circuit consisting of the extraction stage and the storage tank and only a small part of the uranium-loaded extraction solution is routed to scrubbing and stripping.Type: GrantFiled: January 27, 2011Date of Patent: January 6, 2015Assignee: Outotec OyjInventors: Bror Nyman, Erkki Paatero, Stig-Erik Hultholm, Eero Ekman
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Patent number: 8926730Abstract: The invention relates to a method for recovering gold by solvent extraction from an acidic chloride-containing aqueous solution or from slurry containing gold-bearing solids using a diester-based reagent that is poorly soluble in water as organic extraction solution. In accordance with the method, gold is extracted extremely effectively, but other precious metals and many other metals quite sparingly. Gold is stripped from the extraction phase with pure water, from which the gold can be reduced either chemically or electrochemically.Type: GrantFiled: June 7, 2011Date of Patent: January 6, 2015Assignee: Outotec OyjInventors: Erkki Paatero, Mika Haapalainen
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Publication number: 20130104701Abstract: The invention relates to a method for recovering gold by solvent extraction from an acidic chloride-containing aqueous solution or from slurry containing gold-bearing solids using a diester-based reagent that is poorly soluble in water as organic extraction solution. In accordance with the method, gold is extracted extremely effectively, but other precious metals and many other metals quite sparingly. Gold is stripped from the extraction phase with pure water, from which the gold can be reduced either chemically or electrochemically.Type: ApplicationFiled: June 7, 2011Publication date: May 2, 2013Applicant: Outotec OyjInventors: Erkki Paatero, Mika Haapalainen
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Publication number: 20120297929Abstract: A method for the selective recovery of uranium from a sulphate-based acidic aqueous solution of uranium containing iron and other metals by means of solvent extraction, in which the extractant used in the organic extraction solution is bis(2-ethylhexyl) phosphate and a liquid branched trialkyl phosphine oxide is the modifying agent. It is typical of the method that the uranium concentration in the feed solution is less than 50 mg/l and a reducing agent is introduced into the aqueous and/or extraction solution to prevent the permanent oxidation of iron to trivalent. In the method the majority of the extraction solution is circulated in a circuit consisting of the extraction stage and the storage tank and only a small part of the uranium-loaded extraction solution is routed to scrubbing and stripping.Type: ApplicationFiled: January 27, 2011Publication date: November 29, 2012Applicant: Outotec OyjInventors: Bror Nyman, Erkki Paatero, Stig-Erik Hultholm, Eero Ekman
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Publication number: 20120080382Abstract: The invention relates to a method and apparatus for restoring the extractive potential of organic hydroxyoxime-based extraction solution used in the recovery of metals by liquid-liquid extraction. The method is two-stage, in which an aqueous solution of hydroxylamine or some hydroxylamine compound is used in the reaction stage, and the removal of the undesirable compounds generated in the reaction occurs in the second stage by adsorption purification. The reaction stage and the adsorptive stage are carried out in a mixing tank.Type: ApplicationFiled: May 26, 2010Publication date: April 5, 2012Applicant: OUTOTEC OYJInventors: Erkki Paatero, Kai Jyrkkä, Sami Virolainen
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Publication number: 20120018376Abstract: The invention relates to an apparatus and method for removing molybdenum and other possible impurities from an organic copper-containing extraction solution in connection with the liquid-liquid extraction related to copper recovery. The removal of impurities occurs in one or several removal units built into the organic extraction solution storage tank.Type: ApplicationFiled: March 25, 2010Publication date: January 26, 2012Applicant: OUTOTEC OYJInventors: Hannu Laitala, Erkki Paatero, Bror Nyman, Eero Ekman
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Patent number: 6924371Abstract: The invention relates to the use of a weakly acid cation exchange resin for chromatographic separation of carbohydrates. In the invention the hydrophilic/hydrophobic interaction of carbohydrates, sugars and sugar alcohols with the weakly acid cation exchange resin is utilized. The weakly acid cation exchange resin is used for separation of hydrophobic saccharides, such as deoxy, methyl and anhydrosugars and anhydrosugaralcohols from more hydrophilic saccharides.Type: GrantFiled: March 31, 2003Date of Patent: August 2, 2005Assignee: Danisco Sweeteners OyInventors: Ari Kärki, Heikki Heikkilä, Juho Jumppanen, Jari Tiihonen, Tiina Tervala, Nina Mäyrä, Vili Ravanko, Hannu Paananen, Erkki Paatero
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Publication number: 20040006223Abstract: The invention relates to the use of a weakly acid cation exchange resin for chromatographic separation of carbohydrates. In the invention the hydrophilic/hydrophobic interaction of carbohydrates, sugars and sugar alcohols with the weakly acid cation exchange resin is utilised. The weakly acid cation exchange resin is used for separation of hydrophobic saccharides, such as deoxy, methyl and anhydrosugars and anhydrosugaralcohols from more hydrophilic saccharides.Type: ApplicationFiled: March 31, 2003Publication date: January 8, 2004Inventors: Ari Karki, Heikki Heikkila, Juho Jumppanen, Jari Tiihonen, Tiina Tervala, Nina Mayra, Vili Ravanko, Hannu Paananen, Erkki Paatero
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Patent number: 6664340Abstract: The invention relates to sulphonated polymer resins, particularly polymer resins with a sulphonated shell layer, and the preparation thereof. Resins according to the invention are prepared by sulphonating a polymer in a non-swollen state with substantially pure gaseous sulphur trioxide substantially in the shell layer of the polymer particles. The polymer to be sulphonated can be for example a styrene-DVB copolymer. The resins according to the invention can be used for example as chromatographic resins, ion-exchange resins and catalyst resins.Type: GrantFiled: May 28, 2002Date of Patent: December 16, 2003Assignee: Danisco Finland OyInventors: Ari Kärki, Erkki Paatero, Heikki Heikkilä, Heikki Mononen, Hannu Paananen, Jari Tiihonen