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公开(公告)号：US20220325004A1
公开(公告)日：2022-10-13
申请号：US17616352
申请日：2019-06-04
发明人： Daisuke HIROSE , Masashi GENDA , Naoki WADA , Kentaro TAKI , Kenji TAKAHASHI , Hiroyuki MATSUMURA
摘要： Provided is a method that enables industrially efficient production of an esterified polysaccharide product. A method for producing an esterified polysaccharide product, the method including reacting a polysaccharide-containing biomass, a basic ionic liquid with a pKa of a conjugate acid of an anion from 2 to 19 as a calculated value in a vacuum, and an esterifying agent using a kneader equipped with a shear force application mechanism. A cation constituting the basic ionic liquid is preferably one selected from the group consisting of an imidazolium cation, a pyridinium cation, and a tetraalkylammonium cation.
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公开(公告)号：US20220267574A1
公开(公告)日：2022-08-25
申请号：US17629856
申请日：2019-12-09
申请人： DAICEL CORPORATION
摘要： An object of the present invention is to provide a cellulose acetate with excellent biodegradability in seawater.
A cellulose acetate having a total degree of acetyl substitution of not greater than 2.7, a ratio τ of a sum of a degree of acetyl substitution at the 2-position and a degree of acetyl substitution at the 3-position to a degree of acetyl substitution at the 6-position in the total degree of acetyl substitution of not less than 2.0, and a sulfate component amount of greater than 20 ppm and not greater than 400 ppm.-
公开(公告)号：US20240191063A1
公开(公告)日：2024-06-13
申请号：US18404977
申请日：2024-01-05
申请人： DAICEL CORPORATION
CPC分类号： C08L1/12 , C08J5/18 , C08K3/22 , C08K2003/222 , C08L2201/06
摘要： An object of the present invention is to provide a cellulose acetate with excellent biodegradability in seawater.
A cellulose acetate having a total degree of acetyl substitution of not greater than 2.7, a ratio τ of a sum of a degree of acetyl substitution at the 2-position and a degree of acetyl substitution at the 3-position to a degree of acetyl substitution at the 6-position in the total degree of acetyl substitution of not less than 2.0, and a sulfate component amount of greater than 20 ppm and not greater than 400 ppm.-
公开(公告)号：US20220227973A1
公开(公告)日：2022-07-21
申请号：US17715989
申请日：2022-04-08
申请人： Daicel Corporation
发明人： Hiroyuki MATSUMURA , Hiroki TANIGUCHI , Akihiro HIGUCHI , Tomohiro HASHIZUME , Masaaki KUSUMOTO
摘要： This cellulose acetate has a total degree of acetyl substitution of 1.75 or more and 2.55 or less, and a degree of acetyl substitution at 2-position or a degree of acetyl substitution at 3-position is 0.7 or less. This cellulose acetate composition includes the cellulose acetate and an additive. The additive is one or more selected from the group consisting of (a) substances of which a pH of a 1 wt. % aqueous solution at 20° C. is 8 or more, (b) substances that dissolve in water at 20° C. in an amount of 2 wt. % or more, and (c) substances that exhibit biodegradability in seawater.
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公开(公告)号：US20200270368A1
公开(公告)日：2020-08-27
申请号：US16646438
申请日：2018-08-22
申请人： Daicel Corporation
摘要： Provided is a semipermeable membrane with high chlorine resistance and high alkali resistance. A cellulose mixed ester represented by a structural formula of General Formula (I), wherein when X is an aromatic acyl group, a degree of substitution is from 2.91 to 3.0; the aromatic acyl group includes a benzoyl group (A) that may include a substituent, and an aromatic acyl group (B) containing a carboxyl group or a salt of a carboxyl group; when the degree of substitution is 3.0, a degree of substitution of the benzoyl group (A) that may include a substituent is from 2.4 to 2.95, and a degree of substitution of the aromatic acyl group (B) containing a carboxyl group or a salt of a carboxyl group is from 0.05 to 0.6; and in General Formula (I), all or part of Xs are aromatic acyl groups; when part of Xs are aromatic acyl groups, the remainder represents a hydrogen atom or an alkyl group; and n represents an integer from 20 to 20000.
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公开(公告)号：US20190077885A1
公开(公告)日：2019-03-14
申请号：US16081373
申请日：2016-03-15
申请人： DAICEL CORPORATION
摘要： Disclosed herein is cellulose acetate that has excellent heat stability under wet conditions and is capable of reducing the occurrence of end-breakage in a spinning process.Cellulose acetate satisfying the following formula (1): [Mg/H2SO4]>0,[Ca/H2SO4]>0, and 2.70−[Mg/H2SO4])/1.62≤[Ca/H2SO4]≤(37.7−[Mg/H2SO4])/10.3 (1), where the formula (1) represents a relationship between a chemical equivalent ratio of calcium content to residual sulfuric acid content [Ca/H2SO4] and a chemical equivalent ratio of magnesium content to residual sulfuric acid content [Mg/H2SO4].
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公开(公告)号：US20230130981A1
公开(公告)日：2023-04-27
申请号：US18086673
申请日：2022-12-22
申请人： Daicel Corporation
发明人： Hiroyuki MATSUMURA , Hiroki TANIGUCHI , Akihiro HIGUCHI , Tomohiro HASHIZUME , Masaaki KUSUMOTO
摘要： This cellulose acetate has a total degree of acetyl substitution of 1.75 or more and 2.55 or less, and a degree of acetyl substitution at 2-position or a degree of acetyl substitution at 3-position is 0.7 or less. This cellulose acetate composition includes the cellulose acetate and an additive. The additive is one or more selected from the group consisting of (a) substances of which a pH of a 1 wt. % aqueous solution at 20° C. is 8 or more, (b) substances that dissolve in water at 20° C. in an amount of 2 wt. % or more, and (c) substances that exhibit biodegradability in seawater.
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公开(公告)号：US20190151806A1
公开(公告)日：2019-05-23
申请号：US16091728
申请日：2017-03-24
申请人： DAICEL CORPORATION
IPC分类号： B01D71/14
摘要： Provided is a semipermeable membrane having a high chlorine resistance.The semipermeable membrane is formed of a cellulose ester, the cellulose ester having an optionally substituted benzoyl group.
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公开(公告)号：US20210139611A1
公开(公告)日：2021-05-13
申请号：US17153285
申请日：2021-01-20
申请人： Daicel Corporation
发明人： Tomohiro HASHIZUME , Hiroyuki MATSUMURA , Tohru SHIBATA , Hiroshi KOYAMA , Mitsuru OHNO , Tomoichi WATABE
摘要： A cellulose ester, wherein, in a structural formula of the following general formula (I), a degree of substitution where X is an acyl group is from 2.91 to 3.0; the acyl group includes benzoyl group (A) optionally having a substituent, and benzoyl group (B) optionally having a substituent different from that of benzoyl group (A); and when the degree of substitution is 3.0, a degree of substitution of benzoyl group (A) is from 1.5 to 2.9, and a degree of substitution of benzoyl group (B) is from 0.1 to 1.5, wherein all or some of X represents an acyl group; when some of X represents an acyl group, the remainder represents a group selected from a hydrogen atom and an alkyl group; and n represents an integer of from 20 to 20,000.
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公开(公告)号：US20190161557A1
公开(公告)日：2019-05-30
申请号：US16091951
申请日：2017-04-04
申请人： Daicel Corporation
发明人： Tomohiro HASHIZUME , Hiroyuki MATSUMURA , Tohru SHIBATA , Hiroshi KOYAMA , Mitsuru OHNO , Tomoichi WATABE
摘要： A cellulose ester, wherein, in a structural formula of the following general formula (I), a degree of substitution where X is an acyl group is from 2.91 to 3.0; the acyl group includes benzoyl group (A) optionally having a substituent, and benzoyl group (B) optionally having a substituent different from that of benzoyl group (A); and when the degree of substitution is 3.0, a degree of substitution of benzoyl group (A) is from 1.5 to 2.9, and a degree of substitution of benzoyl group (B) is from 0.1 to 1.5, wherein all or some of X represents an acyl group; when some of X represents an acyl group, the remainder represents a group selected from a hydrogen atom and an alkyl group; and n represents an integer of from 20 to 20,000.
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