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公开(公告)号：US11160282B2
公开(公告)日：2021-11-02
申请号：US16093671
申请日：2017-05-12
Applicant: Kemira Oyj
Inventor： Juhana Ahola , Marko Kolari
Abstract: The invention relates to use of a composition comprising a cationic surfactant, which comprises a primary or secondary ammonium head group and a linear unsubstituted C12-alkyl tail, for inducing germination of bacterial endospores in pulp suspension for making of paper, board or the like. The invention relates also to a method for quantitatively reducing bacterial endospores in pulp suspension for making of paper, board or the like. The method comprises obtaining of aqueous pulp suspension, and administering the said composition to the pulp suspension. The cationic surfactant is allowed to interact with bacterial endospores in the pulp suspension. Germination of endospores and destroying microorganisms is thus induced.
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公开(公告)号：US11891499B2
公开(公告)日：2024-02-06
申请号：US17261192
申请日：2019-07-19
Applicant: KEMIRA OYJ
Inventor： Juhana Ahola , Kaisa Karisalmi , Christos Rampotas , Perttu Heiska , Mika Suvanto
CPC classification number: C08L1/02 , B29B9/12 , C08H8/00 , C08L5/06 , C08L5/14 , C08L97/005 , C08L97/02 , D21H11/18
Abstract: The present invention relates to a granular microfibrillated cellulose product comprising a microfibrillated cellulose originating from agricultural biomass, said microfibrillated cellulose product comprising ≤75 wt % of cellulose, preferably ≤70 wt %, based on dry solids content of said product, wherein said granular microfibrillated cellulose product has a bulk density of 500-1200 kg/m3; a flowability of 5-60 ml/s, measured by a Copley scientific powder flowability tester having a stainless steel cylinder with orifice 16 or funnel with orifice 15; and a water content of at most 60 wt %, based on total microfibrillated cellulose product. The present invention further relates to its manufacture and use in and manufacture of paper and paperboard products.
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Patent Agency Ranking
3.发明申请公开(公告)号：US20180037936A1
公开(公告)日：2018-02-08
申请号：US15553999
申请日：2016-02-26
Applicant: Kemira Oyj
Inventor： Kalle Riihinen , Marko Lauraeus , Marko Kolari , Juhana Ahola
Abstract: The invention relates to a method for quantitative monitoring of bacterial endospores in an aqueous environment of a paper or board mill. The method comprises at least the following steps: obtaining at least a first aqueous sample originating from the industrial aqueous environment; destroying bacteria in vegetative form in the first sample by a suitable treatment, preferably by heating the first sample to a desired temperature; adding intercalating agent (such as PMA) to the treated first sample and allowing it to interact (e.g. by cross-linking) with the destroyed bacteria, so that the nucleic acid from the destroyed bacteria are unavailable for PCR; and determining the endospore level in the first sample by using quantitative polymerase chain reaction (qPCR) in which only the DNA from the endospores is available for amplification.
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公开(公告)号：US20210189646A1
公开(公告)日：2021-06-24
申请号：US16758058
申请日：2018-11-08
Applicant: Kemira Oyj
Inventor： Juhana Ahola , Marko Kolari
Abstract: A method for manufacturing a fibrous web, such as web of paper, board, tissue or the like is disclosed. The method includes obtaining at least one fibre suspension of lignocellulosic and/or cellulosic fibres and feeding the fibre suspension into an intermediate residence entity. The fibre suspension including bacterial endospores, is discharged out of the intermediate residence entity via an outlet after a residence time of at least 2 hours in the intermediate residence entity and after a time delay the fibre suspension is formed into a fibrous web. Bacterial endospores are sensitized by adding a germinant surfactant including a primary or secondary ammonium head group and a linear unsubstituted C12-alkyl tail, to the fibre suspension at an addition point located at a lower part of the intermediate residence entity or after the outlet of the intermediate residence entity, but before the formation of the fibrous web.
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公开(公告)号：US20200095730A1
公开(公告)日：2020-03-26
申请号：US16619109
申请日：2018-06-19
Applicant: Kemira Oyj
Inventor： Jaakko Ekman , Marko Kolari , Juhana Ahola
Abstract: A method includes forming an aqueous fibre suspension including cellulosic fibres from one or more raw material flows, and applying at least one chemical and/or physical control measure to the aqueous fibre suspension or at least one of its raw material flows for control of microbial activity in the aqueous fibre suspension or the raw material flow before an inlet of an intermediate residence entity. In this manner a starting ORP value for the aqueous fibre suspension is obtained. The aqueous fibre suspension is in the intermediate residence entity at least a minimum delay time. A final ORP value is measured for the aqueous fibre suspension after an outlet of the said intermediate residence entity before the formation of the fibrous web. An ORP difference value between the starting ORP and final ORP values is calculated. Finally, the aqueous fibre suspension is formed into a fibrous web and dried.
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公开(公告)号：US11598051B2
公开(公告)日：2023-03-07
申请号：US16619109
申请日：2018-06-19
Applicant: Kemira Oyj
Inventor： Jaakko Ekman , Marko Kolari , Juhana Ahola
Abstract: A method includes forming an aqueous fibre suspension including cellulosic fibres from one or more raw material flows, and applying at least one chemical and/or physical control measure to the aqueous fibre suspension or at least one of its raw material flows for control of microbial activity in the aqueous fibre suspension or the raw material flow before an inlet of an intermediate residence entity. In this manner a starting ORP value for the aqueous fibre suspension is obtained. The aqueous fibre suspension is in the intermediate residence entity at least a minimum delay time. A final ORP value is measured for the aqueous fibre suspension after an outlet of the intermediate residence entity before the formation of the fibrous web. An ORP difference value between the starting ORP and final ORP values is calculated. Finally, the aqueous fibre suspension is formed into a fibrous web and dried.
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公开(公告)号：US11530514B2
公开(公告)日：2022-12-20
申请号：US16758058
申请日：2018-11-08
Applicant: Kemira Oyj
Inventor： Juhana Ahola , Marko Kolari
IPC: D21H17/11 , D21C5/00 , A01N47/44 , A01N59/00 , C02F1/50 , D21H17/66 , D21H21/24 , D21H21/36 , C02F103/28
Abstract: A method for manufacturing a fibrous web, such as web of paper, board, tissue or the like is disclosed. The method includes obtaining at least one fibre suspension of lignocellulosic and/or cellulosic fibres and feeding the fibre suspension into an intermediate residence entity. The fibre suspension including bacterial endospores, is discharged out of the intermediate residence entity via an outlet after a residence time of at least 2 hours in the intermediate residence entity and after a time delay the fibre suspension is formed into a fibrous web. Bacterial endospores are sensitized by adding a germinant surfactant including a primary or secondary ammonium head group and a linear unsubstituted C12-alkyl tail, to the fibre suspension at an addition point located at a lower part of the intermediate residence entity or after the outlet of the intermediate residence entity, but before the formation of the fibrous web.
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