Patents by Inventor Mirja Lindroos
Mirja Lindroos 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: 9068236Abstract: The present invention relates to a process for the production of xylose and dissolving pulp from xylan-containing biomass, such as hardwood. The invention is based on prehydrolysis of the xylan-containing biomass with SO2 in specified conditions, followed by chromatographic fractionation, nanofiltration or precipitation crystallization of the xylose-containing prehydrolyzate to obtain a xylose product having a xylose content of at least 55% on DS. The dissolving pulp obtained from the process can be used for example for the production of viscose.Type: GrantFiled: October 20, 2009Date of Patent: June 30, 2015Assignee: Dupont Nutrition Biosciences APSInventors: Heikki Heikkila, Jari Lewandowski, Mirja Lindroos, Pia Saari
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Publication number: 20110192560Abstract: The present invention relates to a process for the production of xylose and dissolving pulp from xylan-containing biomass, such as hardwood. The invention is based on prehydrolysis of the xylan-containing biomass with SO2 in specified conditions, followed by chromatographic fractionation, nanofiltration or precipitation crystallization of the xylose-containing prehydrolyzate to obtain a xylose product having a xylose content of at least 55% on DS. The dissolving pulp obtained from the process can be used for example for the production of viscose.Type: ApplicationFiled: October 20, 2009Publication date: August 11, 2011Applicant: DANISCO A/SInventors: Heikki Heikkila, Jari Lewandowski, Mirja Lindroos, Pia Saari
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Publication number: 20080060638Abstract: The invention relates to removing crystallization inhibitors from a solution comprising one or more reducing sugars by nanofiltration, hydrolysis and/or chromatography. The reducing sugars are typically selected from fructose and xylose.Type: ApplicationFiled: November 19, 2007Publication date: March 13, 2008Applicant: Danisco Sweeteners OyInventors: Hannu Koivikko, Minna Kaarto, Heikki Heikkila, Mirja Lindroos, Juha Nurmi
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Patent number: 7314528Abstract: The invention relates to removing crystallization inhibitors from a solution comprising one or more reducing sugars by nanofiltration, hydrolysis and/or chromatography. The reducing sugars are typically selected from fructose and xylose.Type: GrantFiled: January 22, 2007Date of Patent: January 1, 2008Assignee: Danisco Sweeteners OyInventors: Hannu Koivikko, Minna Kaarto, Heikki Heikkilä, Mirja Lindroos, Juha Nurmi
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Publication number: 20070113840Abstract: The invention relates to removing crystallization inhibitors from a solution comprising one or more reducing sugars by nanofiltration, hydrolysis and/or chromatography. The reducing sugars are typically selected from fructose and xylose.Type: ApplicationFiled: January 22, 2007Publication date: May 24, 2007Applicant: Danisco Sweetners OyInventors: Hannu Koivikko, Minna Kaarto, Heikki Heikkila, Mirja Lindroos, Juha Nurmi
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Publication number: 20070112187Abstract: The invention relates to a process of recovering arabinose and optionally other monosaccharides from vegetable fiber rich in heteropolymeric arabinose, such as gum arabic. Said other monosaccharides are typically selected from galactose and rhamnose. The process of the invention comprises controlled hydrolysis of the arabinose-rich vegetable fiber and fractionation of the hydrolysis product to obtain a fraction enriched in arabinose and optionally other product fractions followed by crystallization of arabinose. The invention also relates to a novel method of crystallizing arabinose from biomass-derived material. Furthermore, the invention relates to novel crystalline L-arabinose.Type: ApplicationFiled: October 29, 2004Publication date: May 17, 2007Inventors: Heikki Heikkila, Hannu Koivikko, Juha Nurmi, Jari Mattila, Pia Saari, Nina Nurmi, Paivi Sarmala, Mirja Lindroos, Jari Lewandowski
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Patent number: 7008485Abstract: The invention relates to a process of separating compounds with a small molar mass from compounds having a molar mass less than 1.9 times that of the compounds with a small molar mass using nanofiltration. The compounds with a small molar mass have a typical molar mass less than 250 g/mol. In one embodiment of the invention, pentose sugars are separated from hexose sugars. The invention can be applied to the recovery of xylose from spent liquors and to the recovery of betaine from sugar beet pulp extracts, for example.Type: GrantFiled: December 28, 2001Date of Patent: March 7, 2006Assignee: Danisco Sweeteners OyInventors: Heikki Heikkila, Mika Manttari, Marianne Nystrom, Mirja Lindroos, Hannu Paananen, Outi Puuppo, Hannu Koivikko
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Publication number: 20050211239Abstract: The invention relates to removing crystallization inhibitors from a solution comprising one or more reducing sugars by nanofiltration, hydrolysis and/or chromatography. The reducing sugars are typically selected from fructose and xylose.Type: ApplicationFiled: June 26, 2003Publication date: September 29, 2005Inventors: Hannu Koivikko, Minna Kaarto, Heikki Heikkila, Mirja Lindroos, Juha Nurmi
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Publication number: 20050096464Abstract: The invention relates to a process of recovering arabinose and optionally other monosaccharides from vegetable fiber rich in heteropolymeric arabinose, such as gum arabic. Said other monosaccharides are typically selected from galactose and rhamnose. The process of the invention comprises controlled hydrolysis of the arabinose-rich vegetable fiber and fractionation of the hydrolysis product to obtain a fraction enriched in arabinose and optionally other product fractions followed by crystallization of arabinose. The invention also relates to a novel method of crystallizing arabinose from biomass-derived material. Furthermore, the invention relates to novel crystalline L-arabinose.Type: ApplicationFiled: October 30, 2003Publication date: May 5, 2005Inventors: Heikki Heikkila, Hannu Koivikko, Juha Nurmi, Jari Mattila, Pia Saari, Nina Nurmi, Paivi Sarmala, Mirja Lindroos, Jari Lewandowski
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Patent number: 6872316Abstract: The invention relates to a process of producing a xylose solution from a biomass hydrolysate by subjecting the biomass hydrolysate to nanofiltration and recovering as the nanofiltration permeate a solution enriched in xylose. The biomass hydrolysate used as starting material is typically a spent liquor obtained from a pulping process.Type: GrantFiled: December 28, 2001Date of Patent: March 29, 2005Assignee: Danisco Sweeteners OyInventors: Heikki Heikkilä , Mika Mänttäri, Mirja Lindroos, Marianne Nyström
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Patent number: 6752902Abstract: The invention relates to a method of preparing chemical pulp and xylose by the use of alkaline or neutral cooking and post hydrolysis of the pulp by performing the post hydrolysis directly on the pulp by means of acid treatment. In the method of the invention, the xylan in the pulp is utilized as completely as possible, resulting in a good xylose yield and, simultaneously, acceptable characteristics for the pulp.Type: GrantFiled: January 14, 2002Date of Patent: June 22, 2004Assignee: Danisco Sweeteners OyInventors: Heikki Heikkilä, Mirja Lindroos, Jorma Sundquist, Seppo Kauliomäki, Raimo Rasimus
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Publication number: 20040060868Abstract: The invention relates to a process of separating compounds with a small molar mass from compounds having a molar mass less than 1.9 times that of the compounds with a small molar mass using nanofiltration. The compounds with a small molar mass have a typical molar mass less than 250 g/mol. In one embodiment of the invention, pentose sugars are separated from hexose sugars. The invention can be applied to the recovery of xylose from spent liquors and to the recovery of betaine from sugar beet pulp extracts, for example.Type: ApplicationFiled: June 25, 2003Publication date: April 1, 2004Inventors: Heikki Heikkila, Mika Manttari, Marianne Nystrom, Mirja Lindroos, Hannu Paananen, Outi Puuppo, Hannu Koivikko
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Patent number: 6692577Abstract: The invention relates to a process for purifying a maltose-containing liquor from a undesired impurities, such as maltotriose. The process of the invention is characterized by nanofiltering said liquor and recovering a purified maltose solution as the permeate.Type: GrantFiled: December 28, 2001Date of Patent: February 17, 2004Assignee: Danisko Sweeteners OyInventors: Heikki Heikkilä, Mika Mänttäri, Mirja Lindroos, Marianne Nyström
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Publication number: 20030037892Abstract: The invention relates to a method of preparing chemical pulp and xylose by the use of alkaline or neutral cooking and post hydrolysis of the pulp by performing the post hydrolysis directly on the pulp by means of acid treatment. In the method of the invention, the xylan in the pulp is utilized as completely as possible, resulting in a good xylose yield and, simultaneously, acceptable characteristics for the pulp.Type: ApplicationFiled: January 14, 2002Publication date: February 27, 2003Applicant: Danisco Sweeteners OyInventors: Heikki Heikkila, Mirja Lindroos, Jorma Sundquist, Seppo Kauliomaki, Raimo Rasimus
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Patent number: 6512110Abstract: The invention relates to a process for the production of xylose from a paper-grade hardwood pulp comprising the steps of extracting xylan contained in said pulp into a liquid phase, subjecting the xylan contained in the obtained liquid phase to conditions sufficient to hydrolyze xylan to xylose, and recovering the xylose, wherein the extracting step includes at least one treatment of an aqueous suspension of said pulp or an alkali-soluble material thereof with a xylanase enzyme.Type: GrantFiled: December 8, 1999Date of Patent: January 28, 2003Assignee: Xyrofin OyInventors: Heikki Heikkila, Marja-Leena Sarkki, Vili Ravanko, Mirja Lindroos
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Publication number: 20020158021Abstract: The invention relates to a process for purifying a maltose-containing liquor from a undesired impurities, such as maltotriose. The process of the invention is characterized by nanofiltering said liquor and recovering a purified maltose solution as the permeate.Type: ApplicationFiled: December 28, 2001Publication date: October 31, 2002Applicant: Danisco Sweeteners OyInventors: Heikki Heikkila, Mika Manttari, Mirja Lindroos, Marianne Nystrom
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Publication number: 20020153317Abstract: The invention relates to a process of producing a xylose solution from a biomass hydrolysate by subjecting the biomass hydrolysate to nanofiltration and recovering as the nanofiltration permeate a solution enriched in xylose. The biomass hydrolysate used as starting material is typically a spent liquor obtained from a pulping process.Type: ApplicationFiled: December 28, 2001Publication date: October 24, 2002Applicant: Danisco Sweeteners OyInventors: Heikki Heikkila, Mika Manttari, Mirja Lindroos, Marianne Nystrom
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Patent number: 6262318Abstract: The invention relates to a method of producing xylitol and erythritol from arabinoxylan-containing material. According to the invention, the arabinoxylan-containing material is hydrolyzed and xylose and arabinose are separated from the obtained hydrolysate, whereafter the xylose is reduced to xylitol, and the xylitol is recovered, and the arabinose is subjected to alkaline oxidation to obtain erythronic acid which is reduced to erythritol, and the erythritol is recovered.Type: GrantFiled: November 1, 1999Date of Patent: July 17, 2001Assignee: Xyrofin OyInventors: Heikki Heikkilä, Raimo Alen, Siru Kauko, Mirja Lindroos, Juha Nurmi, Päivi Sarmala, Matti Tylli
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Patent number: 6239274Abstract: The present invention relates to a method of producing xylose by chromatographic separation of the xylose from a sulphite cooking liquor containing for example xylose and xylonic acid. The xylose yield of the separation is affected by the xylonic acid and xylose content in the cooking liquor used in the separation and the amount of base cation used in the sulphite cooking.Type: GrantFiled: August 6, 1999Date of Patent: May 29, 2001Assignee: Xyrofin OyInventors: Heikki Heikkilä, Jarmo Kuisma, Mirja Lindroos, Outi Puuppo, Olli-Pekka Eroma
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Patent number: 6146856Abstract: The present invention relates to a process for the simultaneous production of converted and non-converted sugar and/or non-sugar products. The process is especially adapted to the simultaneous production of isomaltulose and/or trehalulose, and betaine or invert sugar from plant derived juices. Sucrose in said juices are enzymatically converted into isomaltulose and trehalulose and the target products are separately recovered from the resulting solution. The isomaltulose may be further converted into isomalt.Type: GrantFiled: May 21, 1998Date of Patent: November 14, 2000Assignee: Xyrofin OyInventors: Heikki Heikkila, Marja-Leena Sarkki, Mirja Lindroos, Paivi Ojala, Vili Ravanko, Matti Tylli