Patents by Inventor Kari Parviainen
Kari Parviainen 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: 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: 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: 9102533Abstract: A method of treating waste liquors which comprise organic compounds, in order to recover chemical compounds or to recycle chemicals. In the present method, the sodium-based waste liquor, which comprises organic compounds that are sourced from lignocellulose, is subjected to partial wet oxidation, in order to produce organic sodium salts, in which case the partial wet oxidation is carried out in conditions where at least part of the lignin is simultaneously precipitated. The precipitated filtrate or lignin is subjected to further processing. Most suitably, the organic sodium salts, such as Na acetate, which are generated in the partial oxidation of the waste liquor, are also subjected to further processing, in which case it is possible, from the lignin and the organic sodium salts, to efficiently produce compounds which as such are already of sufficient quality as chemicals, or which as gases are suitable for further processing, for instance for production of fuels.Type: GrantFiled: February 28, 2012Date of Patent: August 11, 2015Assignee: Aalto University FoundationInventors: Kristian Melin, 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: 20140054506Abstract: A method of treating waste liquors which comprise organic compounds, in order to recover chemical compounds or to recycle chemicals. In the present method, the sodium-based waste liquor, which comprises organic compounds that are sourced from lignocellulose, is subjected to partial wet oxidation, in order to produce organic sodium salts, in which case the partial wet oxidation is carried out in conditions where at least part of the lignin is simultaneously precipitated. The precipitated filtrate or lignin is subjected to further processing. Most suitably, the organic sodium salts, such as Na acetate, which are generated in the partial oxidation of the waste liquor, are also subjected to further processing, in which case it is possible, from the lignin and the organic sodium salts, to efficiently produce compounds which as such are already of sufficient quality as chemicals, or which as gases are suitable for further processing, for instance for production of fuels.Type: ApplicationFiled: February 28, 2012Publication date: February 27, 2014Applicant: AALTO UNIVERSITY FOUNDATIONInventors: Kristian Melin, Kari Parviainen
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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