公开(公告)号：US20220275163A1

公开(公告)日：2022-09-01

申请号：US17631506

申请日：2020-07-30

Applicant: Daicel Corporation

Inventor： Toru SHIBATA ,  Hiromichi OKURA ,  Yuki HIRABAYASHI

IPC: C08J9/28

Abstract: Provided are porous cellulose particles containing chitosan and having predetermined pores on a surface and a predetermined particle diameter, and a method for producing the porous cellulose particles. Porous cellulose particles including unsubstituted cellulose and chitosan, wherein a content of the chitosan is not greater than 20 mass % in a total of 100 mass % of the unsubstituted cellulose and the chitosan, pores having a diameter from 0.05 to 5 μm are observed in an image of surfaces of the porous cellulose particles observed by a scanning electron microscope, and a proportion of porous cellulose particles having a particle diameter from 10 to 200 μm is not less than 90 mass %.

公开(公告)号：US20180043333A1

公开(公告)日：2018-02-15

申请号：US15560962

申请日：2016-04-01

Applicant: DAICEL CORPORATION

Inventor： Toru SHIBATA ,  Yasuto MORISHITA ,  Keiji NISHIHARA

IPC: B01J20/285 ,  C08J9/28 ,  B01J20/286 ,  C07K1/22

Abstract: Provided are a technique for preparing a porous cellulose medium without using a special gelling agent for a solution in which cellulose acetate serving as a raw material is dissolved; and a porous cellulose medium and the like produced using the technique. A method for producing a porous cellulose medium comprises the step of preparing a flowable homogeneous composition comprising cellulose acetate, a basic compound, and a solvent including water, and gelling the composition by deacetylation reaction of the cellulose acetate.

公开(公告)号：US20190001238A1

公开(公告)日：2019-01-03

申请号：US15748958

申请日：2016-07-29

Applicant: DAICEL CORPORATION

Inventor： Toru SHIBATA ,  Satoshi SHINKURA

IPC: B01D15/40 ,  B01J20/286 ,  B01J20/32 ,  C08F292/00 ,  G01N30/88

Abstract: Provided is a stationary phase for supercritical fluid chromatography that includes a carrier on which is supported a polymer that includes a pyrrolidone backbone in the repeating units of the main chain.

公开(公告)号：US20220275162A1

公开(公告)日：2022-09-01

申请号：US17631504

申请日：2020-07-30

Applicant: Daicel Corporation

Inventor： Toru SHIBATA ,  Hiromichi OKURA ,  Yuki HIRABAYASHI

IPC: C08J9/28

Abstract: Provided is novel porous cellulose having functionality that is not imparted to porous cellulose composed of unsubstituted cellulose, and a method for producing the same. Porous cellulose containing: unsubstituted cellulose; and a glucose unit-containing polymer excluding unsubstituted cellulose, wherein a content of the polymer is not more than 20 mass % in 100 mass % of a total of the polymer and the unsubstituted cellulose.

公开(公告)号：US20170210871A1

公开(公告)日：2017-07-27

申请号：US15327940

申请日：2015-07-22

Applicant: DAICEL CORPORATION

Inventor： Toru SHIBATA ,  Yasuto MORISHITA ,  Yosuke ITO

IPC: C08J9/26 ,  C07K1/22 ,  B01D15/38 ,  B01J20/24 ,  B01J20/28 ,  C07K16/00 ,  C08J3/075

CPC classification number: C08J9/26 ,  B01D15/3809 ,  B01J20/24 ,  B01J20/28019 ,  B01J20/28042 ,  B01J20/285 ,  B01J20/286 ,  B01J20/3007 ,  B01J20/3078 ,  B01J20/3212 ,  B01J20/3274 ,  C07K1/22 ,  C07K16/00 ,  C08J3/075 ,  C08J3/16 ,  C08J2301/12

Abstract: The present invention provides a technique for preparing a porous cellulose medium, through the gelation of a solution in which cellulose acetate as a raw material is dissolved, which does not cause a reaction involving the migration of substances. Specifically, a method for producing a porous cellulose medium is provided which includes the steps of gelling a flowable homogeneous composition containing cellulose acetate, an organic solvent, and water through a decrease in temperature; and hydrolyzing the cellulose acetate contained in the resulting gel.

公开(公告)号：US20220258129A1

公开(公告)日：2022-08-18

申请号：US17619250

申请日：2020-06-19

Applicant: Daicel Corporation

Inventor： Hiromichi OKURA ,  Toru SHIBATA ,  Yuki HIRABAYASHI

IPC: B01J20/285 ,  B01J20/24 ,  B01J20/28 ,  B01J20/30 ,  B01D15/34 ,  B01J2/06

Abstract: Provided is a novel porous cellulose medium that can efficiently separate a large target molecule in a calibration standard. A porous cellulose medium including a porous cellulose particle having a particle size from 1 to 600 μm, wherein, in sieving the porous cellulose medium for classification and using a fraction corresponding to aperture openings between 53 μm and 106 μm as a support for size exclusion chromatography, a polyethylene oxide standard is run through size exclusion chromatography with pure water as a mobile phase, and a weight average molecular weight Mw and a gel partition coefficient Kav of the polyethylene oxide standard satisfy Relationships (A) and (B) above: in a case where 4.80≤log Mw≤5.50,Kav>−0.445×log Mw+2.55  (A) in a case where 5.75≤log Mw,0≤Kav

公开(公告)号：US20220025131A1

公开(公告)日：2022-01-27

申请号：US17297322

申请日：2019-11-26

Applicant: DAICEL CORPORATION

Inventor： Toru SHIBATA ,  Hiromichi OKURA

IPC: C08J3/16

Abstract: Provided is a novel method for producing cellulose beads, the method being capable of suitably producing spherical cellulose beads. The method for producing cellulose beads includes: (Step 1) preparing a coagulating bath having a first liquid medium phase and a second liquid medium phase; (Step 2) forming a particulate cellulose solution in the first liquid medium phase by supplying a cellulose solution to the first liquid medium phase of the coagulating bath; and (Step 3) coagulating the particulate cellulose solution by supplying the particulate cellulose solution in the first liquid medium phase to the second liquid medium phase.

公开(公告)号：US20190126238A1

公开(公告)日：2019-05-02

申请号：US16097924

申请日：2017-05-12

Applicant: DAICEL CORPORATION

Inventor： Toru SHIBATA ,  Yuki HIRABAYASHI

IPC: B01J20/24 ,  B01D15/34 ,  B01J20/28 ,  B01J20/30 ,  B01D15/38 ,  C08J9/28 ,  C07K16/06 ,  C07K1/22

Abstract: Provided is a novel method by which a porous cellulose medium is able to be suitably produced from cellulose acetate. A method for producing a porous cellulose medium, which comprises: a step for preparing a cellulose acetate solution wherein cellulose acetate is dissolved in a solvent; and a step for obtaining a mixed solution by mixing the cellulose acetate solution, a deacetylating agent and a catalyst with each other.

公开(公告)号：US20190060871A1

公开(公告)日：2019-02-28

申请号：US16087178

申请日：2017-03-23

Applicant: DAICEL CORPORATION

Inventor： Toru SHIBATA ,  Satoshi SHINKURA

IPC: B01J20/285 ,  B01J20/287 ,  B01J20/28 ,  B01J20/30 ,  B01J20/32

Abstract: Provided is a chromatography stationary phase having an excellent molecule discriminating ability. Specifically, provided is a chromatography stationary phase including a carrier carrying a copolymer that has a pyrrolidone backbone or a piperidone backbone, and an imide backbone in a repeating unit of the main chain.