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公开(公告)号：US20220348820A1
公开(公告)日：2022-11-03
申请号：US17864076
申请日：2022-07-13
申请人： Hexion Inc.
发明人： Charles ZHA , Jan BEETGE
IPC分类号： C09K8/68 , C09K8/575 , C08B11/02 , C08B37/00 , C08K5/00 , C01F11/02 , C08K3/011 , C09K8/80 , C09K8/90 , C08B15/00
摘要： A method of making a proppant-gel matrix comprising: a) hydrating a gelling agent to form a hydrated gelling agent; b) adding a basic compound to the hydrated gelling agent to form a basic hydrated gelling agent having a pH in the range of 11.5 to 14.0; c) mixing the basic hydrated gelling agent and a proppant to form a basic hydrated gelling system; and d) adding a crosslinking agent to the basic hydrated gelling system to form the proppant-gel matrix, is disclosed. The proppant-gel matrix can then be used as a fracturing fluid in a hydraulic fracturing process.
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公开(公告)号：US20220127381A1
公开(公告)日：2022-04-28
申请号：US17310470
申请日：2020-04-17
发明人： Alexandra Hild , Jöerg Neubauer , Sonja Menz , Matthias Sprehe , Michael Schreck
摘要： A process for producing a crosslinked cellulose ether including the steps of (i) contacting at least one cellulose material with a mixture comprising (ia) at least one crosslinking agent and (ib) at least one alkalization reagent to form an activated cellulose material; and (ii) contacting the activated cellulose material of step (i) with at least one etherification reagent; wherein the at least one etherification reagent reacts with the activated cellulose material to form the crosslinked cellulose ether; and a crosslinked cellulose ether produced by the above process.
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公开(公告)号：US20220106411A1
公开(公告)日：2022-04-07
申请号：US17428774
申请日：2020-04-17
摘要： A process for producing a crosslinked cellulose ether including contacting an activated cellulose material with (i) an aqueous crosslinking agent emulsion, wherein the aqueous crosslinking agent emulsion is a mixture of (ia) at least one crosslinking agent; (ib) water; and (ic) any other optional components desired; and (ii) at least one etherification reagent; wherein the aqueous crosslinking agent emulsion (i) and the at least one etherification reagent (ii) react with the activated cellulose material to form the crosslinked cellulose ether; and a crosslinked cellulose ether produced by the above process.
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14.发明申请公开(公告)号：US20210284757A1
公开(公告)日：2021-09-16
申请号：US17163738
申请日：2021-02-01
IPC分类号： C08B15/08 , D21C5/00 , C08B37/00 , C08H8/00 , D21C3/04 , D21C9/00 , D21C11/00 , C08L1/02 , C07G1/00 , C08B15/00 , C12P7/04 , C12P7/10 , C12P7/14 , C12P7/16 , C12P7/28 , C12P7/46 , C12P7/56 , C12P19/02 , C12P19/14 , C13K1/02 , D21C3/06 , D21H11/18 , D21C3/20 , D21C9/10 , C08B15/02
摘要： Processes disclosed are capable of converting biomass into high-crystallinity nanocellulose with surprisingly low mechanical energy input. In some variations, the process includes fractionating biomass with an acid (such as sulfur dioxide), a solvent (such as ethanol), and water, to generate cellulose-rich solids and a liquid containing hemicellulose and lignin; and mechanically treating the cellulose-rich solids to form nanofibrils and/or nanocrystals. The crystallinity of the nanocellulose material may be 80% or higher, translating into good reinforcing properties for composites. The nanocellulose material may include nanofibrillated cellulose, nanocrystalline cellulose, or both. In some embodiments, the nanocellulose material is hydrophobic via deposition of some lignin onto the cellulose surface. Optionally, sugars derived from amorphous cellulose and hemicellulose may be separately fermented, such as to monomers for various polymers. These polymers may be combined with the nanocellulose to form completely renewable composites.
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公开(公告)号：US20210284756A1
公开(公告)日：2021-09-16
申请号：US17163768
申请日：2021-02-01
发明人： Theodora RETSINA , Kimberly NELSON
摘要： A composition comprising nanocellulose is disclosed, wherein the nanocellulose contains very low or essentially no sulfur content. The nanocellulose may be in the form of cellulose nanocrystals, cellulose nanofibrils, or both. The nanocellulose is characterized by a crystallinity of at least 80%, an onset of thermal decomposition of 300° F. or higher, and a low light transmittance over the range 400-700 nm. Other variations provide a composition comprising lignin-coated hydrophobic nanocellulose, wherein the nanocellulose contains very low or essentially no sulfur content. Some variations provide a composition comprising nanocellulose, wherein the nanocellulose contains about 0.1 wt % equivalent sulfur content, or less, as SO4 groups chemically or physically bound to the nanocellulose. In some embodiments, the nanocellulose contains essentially no hydrogen atoms (apart from hydrogen structurally contained in nanocellulose itself) bound to the nanocellulose. Various compositions, materials, and products may incorporate the nanocellulose compositions disclosed herein.
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公开(公告)号：US20210246247A1
公开(公告)日：2021-08-12
申请号：US17241421
申请日：2021-04-27
IPC分类号： C08F251/02 , C08B3/08 , C08B15/00 , D21H27/00 , D21H11/16 , D21H11/20 , D21H17/37 , D01F11/02 , D21C9/00 , D21H21/22 , B01J20/24 , B01J20/26 , B01J20/28
摘要： Grafted, crosslinked cellulosic materials include cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of said cellulose fibers and said polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa·sec, and/or a MAP value of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains. Example crosslinking mechanisms include esterfication reactions, ionic reactions, and radical reactions, and example crosslinking agents include pentaerythritol, homopolymers of the graft species monomer, and hyperbranched polymers.
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17.发明申请公开(公告)号：US20210222044A1
公开(公告)日：2021-07-22
申请号：US17160846
申请日：2021-01-28
摘要： A process is provided for producing a biomass-derived rheology modifier, comprising: providing a pretreated feedstock comprising cellulose-rich solids; refining the cellulose-rich solids in a first high-intensity refining unit, generating refined cellulose solids; gelling the refined cellulose solids in a second high-intensity refining unit, thereby generating gelled cellulose solids; and homogenizing the gelled cellulose solids in a high-shear homogenizer, thereby generating a biomass-derived rheology modifier. The pretreated feedstock may include kraft pulp, sulfite pulp, AVAP® pulp, soda pulp, mechanical pulp, thermomechanical pulp, and/or chemimechanical pulp, derived from wood or lignocellulosic biomass. The pretreated feedstock may be GP3+® pulp, obtained from steam or hot-water extraction of lignocellulosic biomass. These rheology modifiers may be utilized in a wide variety of applications, including water-based or oil-based hydraulic fracturing fluid formulations, as gelling agents. These rheology modifiers are biodegradable, and their production does not directly involve chemicals other than biomass and water.
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18.发明授权公开(公告)号：US11053323B2
公开(公告)日：2021-07-06
申请号：US15344633
申请日：2016-11-07
申请人： Covidien LP
发明人： Phillip Blaskovich , Valentino Tramontano , Rachit Ohri , Joshua Kennedy , Christopher M. Henry
摘要： A process for dissolving modified cellulose includes contacting modified cellulose solution with at least one multivalent cation to form a plurality of modified cellulose particles.
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公开(公告)号：US20210108000A1
公开(公告)日：2021-04-15
申请号：US16498474
申请日：2018-03-27
申请人： Max Dietz
发明人： Max Dietz
IPC分类号： C08B1/00 , C08B15/00 , C12N5/00 , A61K8/73 , A61K8/02 , A61Q19/00 , A61K31/717 , A61P1/10 , A61P1/00 , A21D2/18 , A23C9/154 , A23L29/262 , A21D13/06 , A23L33/22 , A23L33/24
摘要： The invention relates to separated, decompacted, cellulose-based fibres acquired from a vegetable raw material, wherein the separated, decompacted, cellulose-based fibres have an aspect ratio after soaking in water of longitudinal diameter to transverse diameter of 1:1 to 1000:1 and a water-binding capacity of >200 wt. % and a water retention capacity of >50%, and a method for acquiring and producing these separated, decompacted cellulose-based fibres. The purification method involves incubation of the vegetable material with an aqueous decomposition solution containing at least one dissolved amino acid and/or peptide with 2-50 amino acids to decompose the compacted cellulose-based fibres.
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公开(公告)号：US20210095186A1
公开(公告)日：2021-04-01
申请号：US17118834
申请日：2020-12-11
申请人： Hexion Inc.
发明人： Charles ZHA , Jan Beetge
IPC分类号： C09K8/68 , C09K8/575 , C08B11/02 , C08B37/00 , C08K5/00 , C01F11/02 , C08K3/011 , C09K8/80 , C09K8/90 , C08B15/00
摘要： A method of making a proppant-gel matrix comprising: a) hydrating a gelling agent to form a hydrated gelling agent; b) adding a basic compound to the hydrated gelling agent to form a basic hydrated gelling agent having a pH in the range of 11.5 to 14.0; c) mixing the basic hydrated gelling agent and a proppant to form a basic hydrated gelling system; and d) adding a crosslinking agent to the basic hydrated gelling system to form the proppant-gel matrix, is disclosed. The proppant-gel matrix can then be used as a fracturing fluid in a hydraulic fracturing process.
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