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公开(公告)号：US12077910B2
公开(公告)日：2024-09-03
申请号：US17321990
申请日：2021-05-17
IPC分类号： D21C3/20 , C08B15/08 , C08H8/00 , D21C3/00 , D21C3/06 , D21C5/02 , D21C9/00 , D21C9/10 , D21H11/04 , D21H11/06 , D21H11/20 , B82Y40/00
CPC分类号： D21C3/06 , C08B15/08 , C08H8/00 , D21C3/00 , D21C3/20 , D21C5/02 , D21C9/005 , D21C9/007 , D21C9/10 , D21H11/04 , D21H11/06 , D21H11/20 , B82Y40/00 , Y02W30/64
摘要： Some variations provide a process for producing a nanocellulose material, comprising: providing a biomass feedstock comprising a bleached or unbleached pulp material; fractionating the feedstock in the presence of an acid, a solvent for lignin, and water, to generate cellulose-rich solids and a liquid containing hemicellulose and lignin; and mechanically treating the cellulose-rich solids to form cellulose fibrils and/or cellulose crystals, thereby generating a nanocellulose material. The process is preferably co-located with, or adjacent to, a mill that generates the pulp material. There are several advantages of a bolt-on AVAP® nanocellulose plant to an existing pulp mill, as disclosed herein.
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公开(公告)号：US11970817B2
公开(公告)日：2024-04-30
申请号：US17826700
申请日：2022-05-27
发明人： John Claude Husband , Per Svending , David Robert Skuse , Tafadzwa Motsi , Mikko Likitalo , Alan Coles
IPC分类号： D21C9/00 , D21B1/30 , D21B1/32 , D21D1/20 , D21H11/04 , D21H11/18 , D21H11/20 , D21H15/02 , D21H19/38
CPC分类号： D21C9/007 , D21B1/30 , D21B1/32 , D21C9/001 , D21D1/20 , D21H5/1236 , D21H11/04 , D21H11/18 , D21H11/20 , D21H19/38 , D21H19/385
摘要： A method for preparing an aqueous suspension may include providing a fibrous substrate comprising cellulose having a Canadian Standard freeness equal to or less than 450 cm3, and microfibrillating the fibrous substrate in an aqueous environment by grinding in the presence of a grinding medium consisting essentially of mullite. The grinding may be carried out in the absence of grindable inorganic particulate material. The grinding medium may be present in an amount of at least about 10% by volume of the aqueous environment. The microfibrillated cellulose may have a fibre steepness of from about 20 to about 50.
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公开(公告)号：US11834523B2
公开(公告)日：2023-12-05
申请号：US17142525
申请日：2021-01-06
发明人： Kimberly Nelson , Theodora Retsina
IPC分类号： D21C1/02 , D21C9/00 , D21H11/18 , D21B1/06 , C08B15/08 , D21C5/00 , D21C11/00 , C08H8/00 , C12P19/14 , C12P7/10 , C12P19/02 , C07G1/00 , C08B37/00 , C09K8/10 , C09K8/34 , C09K8/64 , C09K8/68 , C13K1/02 , D21C3/00 , D21C3/06 , D21C9/10
CPC分类号： C08B15/08 , C07G1/00 , C08B37/0057 , C08H8/00 , C09K8/10 , C09K8/34 , C09K8/64 , C09K8/68 , C12P7/10 , C12P19/02 , C12P19/14 , C13K1/02 , D21B1/061 , D21C1/02 , D21C3/003 , D21C3/006 , D21C3/06 , D21C5/005 , D21C9/007 , D21C9/10 , D21C11/0007 , D21H11/18
摘要： Some variations provide a new nanolignocellulose composition comprising, on a bone-dry, ash-free, and acetyl-free basis, from 35 wt % to 80 wt % cellulose nanofibrils, cellulose microfibrils, or a combination thereof, from 15 wt % to 45 wt % lignin, and from 5 wt % to 20 wt % hemicelluloses. The hemicelluloses may contain xylan or mannan as the major component. Novel properties arise from the hemicellulose content that is intermediate between high hemicellulose content of raw biomass and low hemicellulose content of conventional nanocellulose. The nanolignocellulose composition is hydrophobic due to the presence of lignin. Processes for making and using the nanolignocellulose compositions are also described.
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4.发明公开公开(公告)号：US20230279612A1
公开(公告)日：2023-09-07
申请号：US17939365
申请日：2022-09-07
发明人： Paymaan TAHAMTAN , Mark WINDEBANK , David R. SKUSE
CPC分类号： D21C9/007 , D21H11/18 , D21H17/675 , D21H21/20
摘要： A transportable system (1) for re-dispersing an essentially-dried or partially-dried and, optionally, pulverized composition comprising microfibrillated cellulose and, optionally, one or more inorganic particulate material in a liquid medium to form a liquid composition, and associated methods to produce a substantially homogeneous (uniform) re-dispersed suspension of microfibrillated cellulose and, optionally, one or more inorganic particulate material; wherein the tensile index of the microfibrillated cellulose is comparable to the tensile index of a comparable never-dried suspension of microfibrillated cellulose and, optionally, one or more inorganic particulate material.
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公开(公告)号：US20230272579A1
公开(公告)日：2023-08-31
申请号：US18020218
申请日：2021-08-09
发明人： George Dah Ren CHEN , Yiu Wen CHANG
摘要： Embodiments of the invention overcome the shortcomings of prior technologies by infusing nanocellulose in a fibrillated form to enhance the properties of cellulose pulp. These properties may include, for example, the mechanical and barrier properties, i.e., tensile strength, liquid, and gas impermeability such as oxygen, carbon dioxide, and oil, can be improved substantially. Another embodiment of the invention further provide a fibrillated cellulose composite material that include properties of being a strength-enhancing agent, an oligomer, carboxylic acid, plasticizer, an antimicrobial agent, water repellant, oil repellant, and/or a transparent composite.
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公开(公告)号：US11739197B2
公开(公告)日：2023-08-29
申请号：US16867302
申请日：2020-05-05
发明人： Conrardus Hubertus Joseph Theeuwen , Paulus Pieter De Wit , Gijsbert Adriaan Van Ingen , Franciscus Adrianus Ludovicus Maria Staps
摘要： The present invention relates to methods for processing plant and/or micro-organism derived cellulose materials into rheology/structuring agents. More in particular, the present invention relates to methods wherein plant and/or micro-organism derived cellulose material is co-processed with carboxycellulose. The methods of the present invention provide a variety of benefits, in terms of process efficiency and scalability as well as in relation to the properties of the materials that are obtainable using these methods. For instance, it has been found that (highly) concentrated products produced using the method of the invention are easily (re)dispersible in water and aqueous systems to regain much of the cellulose component's original rheological performance.
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7.发明公开公开(公告)号：US20230212041A1
公开(公告)日：2023-07-06
申请号：US18068895
申请日：2022-12-20
发明人： Timothy D. Hall , Maria E. Inman , Stephen T. Synder , Santosh H. Vijapur , E. Jennings Taylor , Thi Xuan Huong Le
CPC分类号： C02F1/46109 , D21C9/18 , D21C9/007 , C02F1/469 , C02F2201/46175 , C02F2001/46157 , C02F2201/46115 , C02F2201/46
摘要： A dewatering apparatus for cellulosic materials includes a chamber for an aqueous solution of a cellulosic material, an inner electrode in the chamber, an outer electrode in the chamber about the inner electrode, and a power supply connected to the inner electrode and the outer electrode applying a voltage potential across the electrodes to remove water associated with the aqueous solution and to dewater the cellulosic materials.
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公开(公告)号：US20180274173A1
公开(公告)日：2018-09-27
申请号：US15979993
申请日：2018-05-15
申请人： Borregaard AS
摘要： The present invention relates to microfibrillated cellulose (“MFC”), in particular to microfibrillated cellulose, which is morphologically different from conventional MFC known in the art and/or which provides improved water retention properties and/or improved rheological properties, in particular increased zero shear viscosity, ηo, (also known as: “viscosity at rest”, i.e. viscosity in the absence of shear forces), in solution, in particular in polyethylene glycol (PEG) as solvent, vis-a-vis conventional MFC as known in the art.
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公开(公告)号：US20180237990A1
公开(公告)日：2018-08-23
申请号：US15755407
申请日：2016-08-23
申请人： Stora Enso OYJ
发明人： Isto Heiskanen , Henri Kastinen , Lars Axrup , Saija Pollanen , Jani Korhonen , Petri Suhonen , Teemu Tiainen , Matti Vakevainen
摘要： Method for producing microfibrillated cellulose(MFC), wherein the method comprising the steps of: Pre-treating of chemical pulp, such that, the pulp reaches a Schopper-Riegler (SR) value above 50, and refining the pulp, at a consistency of 3-6%, in a refiner with refiner blades, wherein the height of the refiner blades is in the range 2-3 mm.
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公开(公告)号：US20180142084A1
公开(公告)日：2018-05-24
申请号：US15577964
申请日：2016-06-01
发明人： Bernard CATHALA , Ana VILLARES , Jean-Guy BERRIN , Celine MOREAU
CPC分类号： C08L1/02 , B82Y40/00 , C08L1/04 , C12P19/04 , D21C5/005 , D21C9/007 , D21H11/04 , D21H11/06 , D21H11/18 , D21H11/20 , D21H17/05 , D21H25/005
摘要： Disclosed is a method for producing nanocelluloses from a cellulose substrate including cellulose fibers, the method including the following sequence of steps: a step of enzymatic treatment of the cellulose substrate, by bringing same into contact with at least one cleaving enzyme, then a step of mechanical treatment of the cellulose substrate subjected to the step of enzymatic treatment, in order to delaminate the cellulose fibres and obtain the nanocelluloses. The at least one cleaving enzyme is chosen from the enzymes belonging to the family of lytic polysaccharide monooxygenases (LPMOs) capable of achieving cleavage in the presence of an electron donor. Also disclosed are the nanocelluloses obtained according to the method.
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