公开(公告)号：US11242654B2

公开(公告)日：2022-02-08

申请号：US16617770

申请日：2018-06-14

申请人： Kemira Oyj

发明人： Tarja Turkki ,  Anneli Lepo

IPC分类号： D21H19/82 ,  B65D65/42 ,  D21H19/20 ,  D21H19/40 ,  D21H19/54 ,  D21H19/58 ,  D21H19/64 ,  D21H27/10

摘要： A coating structure for a sheet-like substrate, which includes lignocellulosic fibres is disclosed. The structure includes at least one pre-coat layer including at least 70 weight-% of a first styrene (meth)acrylate copolymer polymerised in the presence of a stabiliser, having a glass transition temperature Tg ≤20° C. preferably ≤10° C., ≤30 weight-% of inorganic platy mineral particles and 0.01-2 weight-% of at least one first thickener. The coating structure further includes a top coat layer including at least 50 weight-% of a second styrene (meth)acrylate copolymer polymerised in the presence of a stabiliser having a glass transition temperature Tg ≤20° C. preferably ≤10° C., ≤30 weight-% of inorganic mineral particles, 0.01-5 weight-% of at least one second thickener and 0.5-30 weight-% of an antiblocking agent. Further disclosed is a sheet-like product coated with the coating structure.

公开(公告)号：US11242492B2

公开(公告)日：2022-02-08

申请号：US16438856

申请日：2019-06-12

申请人： KEMIRA OYJ

发明人： Miguel Pelaez ,  Thomas Fenderson

IPC分类号： C10G33/06 ,  C10G27/02 ,  C10G1/04 ,  C10G27/12 ,  C10G29/20 ,  C10G29/12

摘要： The present embodiments generally relate to methods for the treatment of tailings, e.g., oil sands tailings, including methods comprising the use of one or more flocculants, one or more coagulants and one or more oxidants to treat said tailings and/or to improve the performance of said one or more flocculants.

公开(公告)号：US11214927B2

公开(公告)日：2022-01-04

申请号：US16610101

申请日：2018-06-13

申请人： Kemira Oyj

发明人： Mikko Virtanen ,  Kimmo Strengell ,  Juan Cecchini ,  Matti Hietaniemi

IPC分类号： D21F1/02 ,  D21H21/20 ,  D21F9/00 ,  D21F11/04 ,  D21H11/14 ,  D21H17/25 ,  D21H17/28 ,  D21H17/42 ,  D21H17/45 ,  D21H27/38

摘要： A method is disclosed for increasing strength properties, preferably burst strength and SCT strength, of a paper or board product. The paper or board product is manufactured from a fibrous web produced by a multilayer headbox, where an aqueous layer is formed between at least a first and a second fibre layer formed from fibrous stock suspension(s), and where feed water for the aqueous layer includes at least one cationic polymer. The method of the invention includes adding an anionic additive selected from a group comprising anionic synthetic organic polymers, anionic polysaccharides, and any of their combinations to the feed water before formation of the aqueous layer.

公开(公告)号：US11208766B2

公开(公告)日：2021-12-28

申请号：US16644175

申请日：2018-09-26

申请人： Kemira Oyj

发明人： Yuping Luo ,  Junhua Chen ,  Zheng Dang ,  Jennifer Riser

IPC分类号： D21H21/20 ,  D21H17/37 ,  D21H17/28 ,  D21H17/42 ,  D21H21/10 ,  D21H21/16

摘要： A surface treatment composition is disclosed including anionic polyacrylamide, which has a weight average molecular weight, MW, in the range of 100 000-2 000 000 g/mol, and free glyoxal. Further disclosed is a use of the surface treatment composition, a method for producing paper, board or the like and a paper product.

公开(公告)号：US20210396674A1

公开(公告)日：2021-12-23

申请号：US17281857

申请日：2019-09-27

申请人： Kemira Oyj

发明人： Salla PUUPPONEN ,  Sari KRAPU

IPC分类号： G01N21/64 ,  G01N21/77 ,  G01N1/34

摘要： The present invention relates to a method for determining concentration of phosphate in a sample method comprises mixing the sample with a lanthanide (III) chelate or with lanthanide (III) ion and a chelation agent; allowing the phosphate in the sample to interact with the lanthanide (III) chelate; or with the lanthanide (III) ion and the chelation agent; exciting the sample and detecting a sample signal deriving from the sample by using time-resolved luminescence measurement; and determining the concentration of the phosphate in the sample.

公开(公告)号：US11162221B2

公开(公告)日：2021-11-02

申请号：US16496459

申请日：2018-03-29

申请人： Kemira Oyj

发明人： Tom Lundin ,  Kaisa Karisalmi ,  Heikki Sojakka

IPC分类号： D21H11/18 ,  D21H17/37 ,  B32B27/10 ,  D21H17/25 ,  D21H21/10 ,  D21H21/20

摘要： The invention relates to a method for producing paper, board or the like. The method comprises obtaining a fibre stock comprising lignocellulosic fibres and adding a retention agent system comprising a cationic synthetic polymer to the fibre stock and forming a fibrous web from the fibre stock and drying the web. Microfibrillated non-wood cellulose is added to the fibre stock as a component of the retention agent system and sequentially with the cationic synthetic polymer.

公开(公告)号：US11136722B2

公开(公告)日：2021-10-05

申请号：US16496975

申请日：2018-03-26

申请人： Kemira Oyj

发明人： Elisabeth Lackinger-Csarmann ,  Johannes Fallmann ,  Alexander Wahl ,  Thomas Schwind ,  Jürgen Sartori ,  Samuel Okoli

IPC分类号： D21H21/16 ,  D21H11/14 ,  D21H17/02 ,  D21H17/15 ,  D21H17/67 ,  D21H17/00 ,  D21H27/10 ,  D21H27/22

摘要： A manufacturing method of a paper, board or the like having a grammage in a range of 125-600 g/m2, preferably 150-210 g/m2, including adding a paper sizing agent including maleated vegetable oil and an alkenyl succinic anhydride (ASA) to a fibre stock including at least 80 weight-% of recycled fibre material and having calcium concentration of at least 500 mg/l, expressed as CaO.

公开(公告)号：US20210300803A1

公开(公告)日：2021-09-30

申请号：US17230494

申请日：2021-04-14

申请人： KEMIRA OYJ

发明人： Duane C. Wilson ,  Thomas Fenderson ,  Igal Maasen ,  Sukhjit Aujla

IPC分类号： C02F1/56 ,  C02F11/14 ,  C08F220/56 ,  C08L33/26

摘要： The present embodiments generally relate to the use of one or more polymers, e.g., one or more dry acid polymers and/or one or more dry acid polymers with salt, as flocculants, generally for treating tailings, e.g., oil sands tailings, in need of solid-liquid separation, e.g., in order to efficiently recycle water and/or to reduce the volume of tailings which may be transferred to a tailings pond and/or a dedicated disposal area.

公开(公告)号：US20210283571A1

公开(公告)日：2021-09-16

申请号：US16319493

申请日：2017-08-08

申请人： KEMIRA OYJ

发明人： David GOULT ,  Simon NAYLOR ,  Dave TUFF

IPC分类号： B01J19/22

摘要： The invention relates to an arrangement for continuous production of polymer including a polymerisation reactor. The reactor includes a first pulley and a second pulley arranged at a distance from each other, which distance, defining a longitudinal first direction, and a flexible endless belt having a first edge section and a second edge section, which belt, is arranged to travel over the first pulley and the second pulley as a flat belt. The reactor further includes a supporting structure, which is arranged to support the flexible endless belt between the first pulley and the second pulley, whereby the supporting structure is arranged to form the flexible endless belt into a trough section by deviating the first edge section and the second edge section of the flexible endless belt away from the first direction. The trough section has a width-to-height ratio

公开(公告)号：US11072886B2

公开(公告)日：2021-07-27

申请号：US16311213

申请日：2017-06-27

申请人： KEMIRA OYJ

发明人： Leif Robertsén ,  Veli-Matti Vuorenpalo ,  Anna-Maija Perander ,  Pentti Pekonen ,  Jonas Konn

IPC分类号： D21C9/16 ,  D21C9/10

摘要： The present invention relates to a process for treating pulp comprising a step, wherein the pulp is treated with distilled percarboxylic acid, such as distilled per-carboxylic acid (dPAA), and peroxide, such as hydrogen peroxide.