公开(公告)号：US11643476B2

公开(公告)日：2023-05-09

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

CPC classification number: C08B3/16 ,  B01D69/08 ,  B01D71/14 ,  B01D71/18 ,  C08J5/18 ,  C08J2301/14

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：US20140096594A1

公开(公告)日：2014-04-10

申请号：US14099555

申请日：2013-12-06

Applicant: Sei-ichi Manabe

Inventor： Sei-ichi MANABE ,  Saori KIHARA

IPC: G01N15/08

CPC classification number: B01D71/10 ,  B01D61/28 ,  B01D61/362 ,  B01D63/082 ,  B01D63/085 ,  B01D65/102 ,  B01D67/0009 ,  B01D67/0093 ,  B01D69/06 ,  B01D71/14 ,  B01D2313/086 ,  B01D2313/20 ,  B01D2323/08 ,  B01D2325/02 ,  B01D2325/36 ,  C08K3/16 ,  C08K3/24 ,  G01N15/08 ,  C08L1/10 ,  C08L1/12

Abstract: A pore diffusion type flat membrane separation apparatus X including a plurality of flat membranes 7 and a plurality of flat plate-like supports 1 arranged alternately with each other, each flat membrane 7 defining a plurality of pores and configured to separate a predetermined dispersed substance contained in a solution by a pore diffusion technique, each flat plate-like support 1 having a flow conduit 2 on one or both faces thereof. A ratio between a spatial volume of the flow conduit 2 and a membrane area of the flat membrane 7 is set from 0.04 to 0.4 cm. The flat plate-like support 1 includes, in at least two positions in a lateral face thereof, water conduits 3 in communication with the flow conduit 2, so that flow directions of the solution in the flow conduits 2 of upper and lower flat plate-like supports 1 across the flat membrane 7 may be substantially same directions. The flat plate-like support 1 and the flat membrane 7 can be assembled with and disassembled from each other.

Abstract translation: 包括多个平膜7和多个平板状支撑体1的孔扩散型平膜分离装置X，每个平膜7限定多个孔，并且构造成分离包含的预定分散物质 在通过孔扩散技术的溶液中，每个平板状支撑件1在其一个或两个面上具有流动管道2。 流路2的空间体积与平膜7的膜面积之比为0.04〜0.4cm。 平板状支撑体1在其侧面的至少两个位置包括与流动管道2连通的水导管3，使得上，下平板状支撑件1的流动管道2中的溶液的流动方向， 横跨平膜7的支撑件1可以是基本相同的方向。 平板状支撑体1和平膜7可以彼此组装和拆卸。

公开(公告)号：US20030038081A1

公开(公告)日：2003-02-27

申请号：US09929821

申请日：2001-08-14

Inventor： I-Fan Wang ,  Richard McDonogh

IPC: B01D061/00 ,  B01D071/10

CPC classification number: B01D67/0093 ,  B01D61/145 ,  B01D61/147 ,  B01D67/0009 ,  B01D67/0013 ,  B01D67/0018 ,  B01D69/02 ,  B01D71/14 ,  B01D71/16 ,  B01D2323/12 ,  B01D2323/30 ,  B01D2325/022 ,  B01D2325/20 ,  C07K1/34 ,  C07K16/065

Abstract: The present invention relates to ultra-thin high strength asymmetric microfiltration and ultrafiltration cellulosic membranes. The membranes are internally hydrophilic. A method of preparing such membranes and their use in separating proteins from biological liquids are also provided.

Abstract translation: 本发明涉及超薄高强度不对称微滤和超滤纤维素膜。 膜是内部亲水的。 还提供了制备这种膜的方法及其在从生物液体中分离蛋白质的用途。

公开(公告)号：US5089138A

公开(公告)日：1992-02-18

申请号：US640079

申请日：1991-01-11

Applicant: Tohru Shibata ,  Hajime Namikoshi ,  Ichiro Okamoto

Inventor： Tohru Shibata ,  Hajime Namikoshi ,  Ichiro Okamoto

IPC: C09K3/00 ,  B01D15/08 ,  B01D71/08 ,  B01D71/14 ,  B01J20/24 ,  B01J20/26 ,  B01J20/281 ,  B01J20/291 ,  B01J20/32 ,  C07B31/00 ,  C07B57/00 ,  C07B63/00 ,  C07B63/02 ,  C07C45/78 ,  C07C67/00 ,  G01N30/88

CPC classification number: B01J20/285 ,  B01D15/08 ,  B01D15/3833 ,  B01D71/08 ,  B01D71/14 ,  B01J20/06 ,  B01J20/08 ,  B01J20/103 ,  B01J20/12 ,  B01J20/24 ,  B01J20/26 ,  B01J20/262 ,  B01J20/28004 ,  B01J20/28078 ,  B01J20/286 ,  B01J20/29 ,  B01J20/3092 ,  B01J20/3204 ,  B01J20/3219 ,  B01J20/3246 ,  B01J20/3259 ,  B01J20/3274 ,  C07B57/00 ,  C07B63/00 ,  C07C45/78 ,  C07C45/786 ,  B01J2220/4825 ,  B01J2220/485 ,  B01J2220/54 ,  B01J2220/58

Abstract: A separation agent essentially comprises an aliphatic or aromatic ester of a polysaccharide, except for cellulose acetate and an aromatic ester of cellulose. It is useful for separation of various chemical substances, especially optical resolution of optical isomers.

公开(公告)号：US4886631A

公开(公告)日：1989-12-12

申请号：US239686

申请日：1988-09-02

Applicant: Mitsuru Suzuki ,  Makoto Ohno ,  Isamu Yamamoto

Inventor： Mitsuru Suzuki ,  Makoto Ohno ,  Isamu Yamamoto

IPC: A61M1/18 ,  B01D69/02 ,  B01D69/08 ,  B01D71/06 ,  B01D71/14 ,  D01D5/24 ,  D01F2/28

CPC classification number: D01D5/24 ,  B01D69/02 ,  B01D69/08 ,  B01D71/14 ,  D01F2/28

Abstract: A hollow fiber membrane made of a cellulose ester having a membrane thickness of not more than 75 .mu.m, and having void volume (x, % by volume) of the membrane and a rate of ultrafiltration (y, ml/m.sup.2.hr.mmHg) satisfying the following formula:55x-2500.ltoreq.y.ltoreq.48x+600wherein x.gtoreq.60,and further has a .beta.-lipoprotein sieving coefficient (sc) of not less than 0.95, and preferably having further not more than 2% of change ratio in the axial direction and in the radial direction when dipped freely in water at 121.degree. C. for 20 minutes. Said hollow fiber membrane is useful for the medical use, such as the exchange of plasma in patients, collection of plasma from healthy donors, the pre-treatment of plasma for the collection and purification of valuable materials contained in plasma.

Abstract translation: 由膜厚不大于75μm，膜的空隙体积（x，体积％）和超滤速度（y，ml / m2.hr.mmHg）的纤维素酯制成的中空纤维膜 ）满足下列公式：55x-2500 = = 60，并且还具有不小于0.95的β-脂蛋白筛分系数（sc），并且优选具有不超过 在121℃下在水中自由浸渍20分钟时，在轴向和径向上的变化率的2％以上。 所述中空纤维膜可用于医疗用途，例如患者血浆的交换，来自健康供体的血浆的收集，等离子体的预处理，用于收集和纯化血浆中包含的有价值物质。

公开(公告)号：US4746475A

公开(公告)日：1988-05-24

申请号：US917982

申请日：1986-10-10

Applicant: Rachel S. Kohn

Inventor： Rachel S. Kohn

IPC: B01D69/12 ,  B01D71/14 ,  B29C41/00 ,  B29C41/12 ,  C08J5/18

CPC classification number: C08J5/18 ,  B01D69/122 ,  B01D71/14 ,  B29C41/003 ,  B29C41/12 ,  B29K2001/00 ,  B29K2001/12 ,  B29K2105/0073 ,  C08J2301/10

Abstract: Disclosed herein are pinhole-free, ultrathin, free-standing cellulose ester films having thicknesses of 400 angstroms or less and a process to prepare them. The films find particular utility in separatory applications.

公开(公告)号：US4371487A

公开(公告)日：1983-02-01

申请号：US89676

申请日：1979-10-30

Applicant: Kaduto Hamada ,  Zitumi Takata ,  Katuhisa Numata

Inventor： Kaduto Hamada ,  Zitumi Takata ,  Katuhisa Numata

IPC: B01D67/00 ,  B01D69/08 ,  B01D71/10 ,  B01D71/14 ,  B01D71/16 ,  B01D71/52 ,  D01F2/28 ,  B29D27/00

CPC classification number: B01D69/087 ,  B01D69/08 ,  B01D71/14 ,  D01F2/28 ,  Y10T428/2975

Abstract: Process for production of a hollow fiber semipermeable membrane which can selectively separate the components of solution or gas mixtures, which consists essentiallly of dissolving cellulose triacetate and an organic acid and optionally a polyether in N-methyl-2-pyrrolidone to give a spinning solution having fixed contents of cellulose triacetate and organic acid and polyether (if any), and extruding the spinning solution through a spinneret into a gaseous atmosphere and immersing the spun fibers in an aqueous coagulation bath. The hollow fiber semipermeable membrane has excellent permeability and excellent separation characteristics with good life and hence is useful for various techniques such as dialysis, ultrafiltration, reverse osmosis, and separation of gases.

Abstract translation: 中空纤维半透膜的制造方法，其可以选择性地分离溶液或气体混合物的组分，该组分主要是将三乙酸纤维素和有机酸和任选的聚醚溶解在N-甲基-2-吡咯烷酮中，得到具有 固定含量的三醋酸纤维素和有机酸和聚醚（如果有的话），并将纺丝溶液通过喷丝头挤出到气态气氛中，并将纺丝纤维浸入含水凝固浴中。 中空纤维半透膜具有优异的渗透性和优异的分离特性，寿命长，因此可用于透析，超滤，反渗透和气体分离等各种技术。

公开(公告)号：US4305824A

公开(公告)日：1981-12-15

申请号：US123799

申请日：1980-02-22

Applicant: Tadahiro Uemura ,  Masaru Kurihara

Inventor： Tadahiro Uemura ,  Masaru Kurihara

IPC: C08K5/092 ,  B01D31/00

CPC classification number: B01D71/14 ,  B01D67/0011 ,  B01D71/16 ,  B01D71/18 ,  B01D71/22 ,  C08K5/092 ,  B01D61/025 ,  B29K2001/12

Abstract: Cellulose derivative reverse osmosis membrane containing tetracarboxylic acid and mono- or divalent carboxylic acid.

Abstract translation: 含有四羧酸和一价或二价羧酸的纤维素衍生物反渗透膜。

公开(公告)号：US4066512A

公开(公告)日：1978-01-03

申请号：US684746

申请日：1976-05-10

Applicant: Chung Jung Lai ,  Stanley M. Goldin

Inventor： Chung Jung Lai ,  Stanley M. Goldin

IPC: A61K39/00 ,  B01D63/16 ,  B01D69/02 ,  B01L3/00 ,  C07K17/08 ,  C12M1/40 ,  C12N11/00 ,  C12N11/02 ,  C12N11/04 ,  C12N11/08 ,  C12N11/12 ,  C12Q1/00 ,  G01N33/48 ,  G01N33/52 ,  G01N33/531 ,  G01N33/545 ,  C07G7/00 ,  C07G7/02 ,  G01N31/14

CPC classification number: B01D69/144 ,  C12M21/18 ,  C12M23/34 ,  C12M25/02 ,  C12M29/04 ,  C12N11/02 ,  G01N33/545 ,  B01D71/14 ,  Y10S530/816

Abstract: A composite membrane structure for immobilizing biologically active materials, such as enzymes, is formed by coating a microporous polymeric membrane with a thin layer of an inert proteinaceous material, such as zein or collagen, so that the resultant coated membrane retains intercommunicating capillary pores that extend through its structure. Immobilization of a biologically active material is carried out by contacting the coated membrane with the biologically active material in solution and drying. Biologically active materials immobilized on the membrane can be used to perform biochemical reactions and are useful in carrying out tests for glucose and uric acid.

公开(公告)号：USRE27319E

公开(公告)日：1972-03-28

申请号：US27319D

申请日：1969-09-16

CPC classification number: B01D71/14 ,  B01D71/22

Abstract: A METHOD OF PREPARING A SEMIPERMEABLE MEMBRANE ADAPTED TO PERMIT SUBSTANTIALLY SELECTIVE DIFUSION THERETHROUGH OF A COMPONENT O A SOLUTION. THE MEMBRANE IS PRPARED FROM A SOLUTION CONTAINING A CELLULOSIC ESTER OR ETHER DERIVATIVE AND A WATER-SOLUBLE LIQUID AMIDE HAVING THE FORMULA R6CONR7R8 WHEREIN R6 IS FROM THE CLASS CONSISTING OF HYDROGEN, LMETHYL AND ETHYL GROUPS AND R7 AND R8 ARE FROM THE CLASS CONSISTING OF HYDROGEN, ETHYL AND PROPYL GROUPS WITHOUT BOTH R7 AND R8 BEING HYDROGEN. THE SOLUTION IS CAST ON A SUPPORT. A PORTION OF THE LIQUID ANIDE IS EVAPORATD TO TRANSFORM THE CAST SOLUTION INTO A MEMBRANE. THE CAST MEMBRANE IS THEN IMMERSED IN WATER AND HEATED TO REDUCE ITS POROSITY.