公开(公告)号：US20190151806A1

公开(公告)日：2019-05-23

申请号：US16091728

申请日：2017-03-24

Applicant: DAICEL CORPORATION

Inventor： Tomohiro HASHIZUME ,  Hiroyuki MATSUMURA ,  Tohru SHIBATA ,  Mitsuru OHNO

IPC: B01D71/14

Abstract: 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.

公开(公告)号：US20200270368A1

公开(公告)日：2020-08-27

申请号：US16646438

申请日：2018-08-22

Applicant: Daicel Corporation

Inventor： Tomohiro HASHIZUME ,  Hiroyuki MATSUMURA ,  Tohru SHIBATA ,  Hiroshi KOYAMA ,  Mitsuru OHNO

IPC: C08B3/16 ,  B01D71/18

Abstract: 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.

公开(公告)号：US20210139611A1

公开(公告)日：2021-05-13

申请号：US17153285

申请日：2021-01-20

Applicant: Daicel Corporation

Inventor： Tomohiro HASHIZUME ,  Hiroyuki MATSUMURA ,  Tohru SHIBATA ,  Hiroshi KOYAMA ,  Mitsuru OHNO ,  Tomoichi WATABE

IPC: C08B3/16 ,  B01D71/14 ,  B01D69/08 ,  B01D71/18 ,  C08J5/18

Abstract: 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.

公开(公告)号：US20190161557A1

公开(公告)日：2019-05-30

申请号：US16091951

申请日：2017-04-04

Applicant: Daicel Corporation

Inventor： Tomohiro HASHIZUME ,  Hiroyuki MATSUMURA ,  Tohru SHIBATA ,  Hiroshi KOYAMA ,  Mitsuru OHNO ,  Tomoichi WATABE

IPC: C08B3/16 ,  C08J5/18 ,  B01D71/18 ,  B01D69/08

Abstract: 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.