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1. 发明授权

US11447689B2 Crosslinked proppant-gel matrix 有权
公开(公告)号：US11447689B2
公开(公告)日：2022-09-20
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 , C08K5/00 , C09K8/80 , C09K8/90 , C08B15/00 , C01B25/30 , C09K8/575 , C08B11/02 , C08B37/00 , C01F11/02 , C08K3/011 , C01B11/00
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.

2. 发明申请

US20210062036A1 Self-Repairing Polyurethane Networks 有权
公开(公告)号：US20210062036A1
公开(公告)日：2021-03-04
申请号：US17093045
申请日：2020-11-09
申请人： Clemson University
发明人： Marek W. Urban , Ying Yang
IPC分类号： C09D175/08 , C08B11/02 , C08B37/00 , C08B37/08 , C08G18/48 , C08G18/64 , C09D175/04 , C08G18/32 , C08G18/40 , C08G18/24 , C08G18/72 , C09D5/00
摘要： The present invention provides alkyl substituted polysaccharide compositions and methods of repairing substrates involving use of the alkyl substituted polysaccharide compositions.

3. 发明授权

US10626237B2 Method of printing a three-dimensional article 有权
公开(公告)号：US10626237B2
公开(公告)日：2020-04-21
申请号：US16356625
申请日：2019-03-18
申请人： Dow Global Technologies LLC
发明人： Roland Bayer , Aleksander J. Pyzik , Sharon Allen
IPC分类号： C08B11/02 , C08B11/04 , C08B11/08 , C08J7/04 , C08B11/193 , D01F2/28 , B33Y70/00 , B29C64/40 , B29C64/118 , B29C64/106 , B29C64/112 , B33Y10/00 , B33Y30/00 , B33Y80/00 , B29K1/00 , B29K55/02 , B29K67/00 , B29K69/00
CPC分类号： C08J7/042 , B29C64/106 , B29C64/112 , B29C64/118 , B29C64/40 , B33Y10/00 , B33Y30/00 , B33Y70/00 , B33Y80/00 , C08B11/193 , D01F2/28 , B29K2001/08 , B29K2055/02 , B29K2067/046 , B29K2069/00 , C08J2301/28 , C08J2401/28 , C08J2455/02 , C08J2467/04
摘要： A three-dimensionally printed article comprises a build material and a support material, the support material comprising a hydroxypropyl methylcellulose having a DS of at least 1.0 and an MS of at least 0.6, wherein DS is the degree of substitution of methoxyl groups and MS is the molar substitution of hydroxypropoxyl groups. The support material can be removed from the build material by contacting the support material with water.

4. 发明授权

US10550202B2 Hydroxyalkyl alkyl cellulose, method for producing the same, and solid preparation 有权
公开(公告)号：US10550202B2
公开(公告)日：2020-02-04
申请号：US15722636
申请日：2017-10-02
申请人： SHIN-ETSU CHEMICAL CO., LTD.
发明人： Takuya Yokosawa , Taishi Kitaguchi , Yasuyuki Hirama , Akira Kitamura
IPC分类号： C08B11/08 , C08B11/02 , C08B3/08 , G01N15/02 , C08B3/14 , G01N21/47
摘要： There is provided is a hydroxyalkyl alkyl cellulose exhibiting good flowability and high compressibility. More specifically, provided are a hydroxyalkyl alkyl cellulose having a volume-based average particle diameter, determined by dry laser diffractometry, of 50 to 100 μm, and having, on a basis of a dynamic image analysis to divide all particles into fine particles, spherical particles and fibrous particles, a volume fraction of the fibrous particles consisting of long and short fibrous particles relative to all of the particles of 45 to 70%, and a volume fraction of the fine particles relative to all of the particles of less than 2.0%; a solid preparation including the hydroxyalkyl alkyl cellulose; and others.

5. 发明授权

US10323101B2 Method for producing polysaccharide derivative and lignin derivative 有权
公开(公告)号：US10323101B2
公开(公告)日：2019-06-18
申请号：US15521200
申请日：2015-10-23
申请人： NATIONAL UNIVERSITY CORPORATION KANAZAWA UNIVERSITY , Kanazawa Institute of Technology
发明人： Ryohei Kakuchi , Kazuaki Ninomiya , Yoshiki Shibata , Kiyoshi Uzawa , Tomoki Ogoshi , Katsuhiro Maeda , Tomoyuki Ikai , Kenji Takahashi
IPC分类号： C07G1/00 , C08B3/00 , C08B3/06 , C08B3/18 , C08B11/00 , C08B11/02
摘要： An object is to provide a method for producing a polysaccharide derivative without using a catalyst, a cocatalyst, or an active compound by esterification, etherification, or the like, from a polysaccharide such as cellulose as a source material, while maintaining a high molecular weight. Another object is to provide a method for producing a cellulose derivative in a separated condition directly from biomass containing lignocellulose. A method for producing a polysaccharide derivative of the present invention is characterized in that a reaction is carried out in a mixture comprising: a source material comprising a polysaccharide; an ionic liquid for which the pKa of a conjugate acid of an anion in DMSO is 12 to 19 and which is capable of producing a carbene; and a chain or cyclic ester compound or an epoxy compound. Preferably as a source material containing a polysaccharide, a biomass source material containing lignocellulose is used.

6. 发明申请

US20180282435A1 METHOD FOR PRODUCING CELLULOSE ETHER 审中-公开
公开(公告)号：US20180282435A1
公开(公告)日：2018-10-04
申请号：US15919909
申请日：2018-03-13
申请人： SHIN-ETSU CHEMICAL CO., LTD.
发明人： Shintaro MATSUSUE , Akira KITAMURA , Mitsuhiro YOSHIDA , Mitsuo NARITA
IPC分类号： C08B11/02 , D21B1/06 , D21C9/00
摘要： A method for producing a cellulose ether having a high viscosity while keeping the same degree of polymerization as that in the production of a shaped pulp without changing a raw material or production facility. More specifically, provided is a method for producing a cellulose ether including steps of: cutting or pulverizing pulp to obtain sheet-like, chip-like, or powdery cellulose pulp, wherein the pulp is formed in a form of roll whose surface layer on at least one of the circumferential side and the ends is removed, or in a form of bale whose surface layer on at least one side is removed; bringing the obtained cellulose pulp into contact with an alkali metal hydroxide solution to obtain alkali cellulose; reacting the alkali cellulose with an alkylating agent to obtain a reaction product mixture; and subjecting the reaction product mixture to purification to obtain the cellulose ether.

7. 发明申请

US20170283513A1 METHOD FOR PRODUCING WATER-SOLUBLE NONIONIC CELLULOSE ETHER POWDER HAVING HIGH BULK DENSITY 审中-公开
公开(公告)号：US20170283513A1
公开(公告)日：2017-10-05
申请号：US15472950
申请日：2017-03-29
申请人： SHIN-ETSU CHEMICAL CO., LTD.
发明人： Mitsuo NARITA
IPC分类号： C08B11/20 , C08B11/02
CPC分类号： C08B11/20 , C08B11/02 , C08B11/08 , C08B11/193
摘要： Provided is a method of stably producing a water-soluble nonionic cellulose ether powder having a high bulk density at low cost by adding a minimum amount of water. More specifically provided is a method for producing a water-soluble nonionic cellulose ether powder, comprising the steps of: reacting alkali cellulose with an etherifying agent to obtain a reaction product; washing and draining the reaction product to obtain a water-soluble nonionic cellulose ether; mixing the water-soluble nonionic cellulose ether with such an amount of water of 70° C. or higher as to make a water content of the water-soluble nonionic cellulose ether become 55 to 90% by weight to obtain a water-containing water-soluble nonionic cellulose ether having a water content of 55 to 90% by weight; cooling the water-containing water-soluble nonionic cellulose ether; and drying and pulverizing the cooled water-containing water-soluble nonionic cellulose ether.

8. 发明授权

US09481738B2 Method for producing cellulose ether 有权
标题翻译：生产纤维素醚的方法
公开(公告)号：US09481738B2
公开(公告)日：2016-11-01
申请号：US13398247
申请日：2012-02-16
申请人： Mitsuo Narita
发明人： Mitsuo Narita
IPC分类号： C08B1/08 , C08B1/06 , C08B11/02 , C08B11/00 , C08B11/193
CPC分类号： C08B1/08 , C08B11/00 , C08B11/193
摘要： Provided is a method for producing cellulose ether whose aqueous solution is transparent and contains a smaller amount of water-insoluble portion. The method comprises at least the steps of: providing at least two alkali cellulose materials having different compositions, each of the materials having been prepared by bringing a pulp into contact with a solution of alkali metal hydroxide and draining; and mixing the at least two alkali cellulose materials having different compositions, wherein each weight ratio of the alkali metal hydroxide in each of the alkali cellulose materials having different compositions to a solid component in the pulp (alkali metal hydroxide/solid component in pulp) is equal to 0.4 to 2.5 times of a weight ratio of alkali metal hydroxide in the alkali cellulose obtained in the step of mixing to solid components in a sum of pulps used for preparation of the alkali cellulose materials.
摘要翻译：本发明提供水溶液透明且含有较少量的水不溶部分的纤维素醚的制造方法。该方法至少包括以下步骤：提供具有不同组成的至少两种碱性纤维素材料，每种材料都是通过使纸浆与碱金属氢氧化物溶液接触并排出而制备的; 并混合至少两种具有不同组成的碱性纤维素材料，其中每种具有不同组成的碱性纤维素材料中的碱金属氢氧化物与纸浆中的固体组分（碱金属氢氧化物/纸浆中的固体组分）的重量比为等于在用于制备碱纤维素材料的纸浆中与固体组分混合的步骤中获得的碱性纤维素中碱金属氢氧化物的重量比的0.4至2.5倍。

9. 发明授权

US08541571B2 Homogeneous synthesis of cellulose ethers in ionic liquids 有权
公开(公告)号：US08541571B2
公开(公告)日：2013-09-24
申请号：US12392222
申请日：2009-02-25
申请人： Eugen Moellmann , Thomas Heinze , Tim Liebert , Sarah Koehler
发明人： Eugen Moellmann , Thomas Heinze , Tim Liebert , Sarah Koehler
IPC分类号： C07H1/00 , C08B11/00 , C08B11/08 , C08B11/02 , C07H15/04
CPC分类号： C08B1/003 , C08B11/00 , C08B11/08 , Y02P20/542
摘要： The invention is directed to a simple and new method for the homogeneous synthesis of cellulose ethers. Ionic liquids are not only used as solvent, but also as reaction media for the homogeneous etherification of cellulose. The dissolved cellulose is treated with the etherification agent in the absence of organic and/or inorganic bases and in the absence and/or in the presence of moderate amounts of water. The obtained cellulose ethers show new distributions of substitution on the polymer chain, resulting in new properties and applications.

10. 发明授权

US08440817B2 Method for producing methyl cellulose 有权
标题翻译：生产甲基纤维素的方法
公开(公告)号：US08440817B2
公开(公告)日：2013-05-14
申请号：US12810670
申请日：2008-12-18
申请人： Munehisa Okutsu
发明人： Munehisa Okutsu
IPC分类号： C07H1/00 , C07H15/04 , C08B1/00 , C08B11/00 , C08B11/02
CPC分类号： C08B11/02
摘要： The present invention relates to a process for efficiently producing methyl cellulose in an industrially convenient manner. The production process of the present invention includes the step of reacting cellulose with methanol in a subcritical state.
摘要翻译：本发明涉及一种以工业上便利的方式有效生产甲基纤维素的方法。本发明的制造方法包括使纤维素与亚临界状态的甲醇反应的工序。

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