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    • 4. 发明专利
    • PRODUCTION OF HOLLOW YARN SEPARATION MEMBRANE
    • JPH01176406A
    • 1989-07-12
    • JP33585187
    • 1987-12-28
    • DAICEL CHEM
    • KOMADA HAJIMENAKAMURA HIROYUKIKOJIMA AKIOISHII KIYOSHI
    • D01F6/76B01D71/68D01D5/24
    • PURPOSE:To improve water permeability while maintaining fractionation performance by dissolving a polysulfone-base polymer in 2-pyrrolidone and adding N-methylacetamide as one component of an additive, spinning and discharging the mixture into an aq. soln. to produce a hollow yarn separation membrane. CONSTITUTION:2-pyrrolidone is used as the solvent of a polysulfone-base polymer and N-methylacetamide is used as one component of an additive and the mixture is discharged through an annular nozzle and coagulated in an aq. soln. The ppt. of polysulfone is formed by infiltration of coagulation liquid from the inner and outer surfaces while keeping the added N-methylacetamide as a nucleus and it is considered that the parts in which N-methylacetamides are brought into contact with each other form micropores and contribute to formation of a network porous layer and cavities. Furthermore the solubility of polysulfone into 2-pyrrolidone is made good and therefore the main chain of the polymer spreads into the soln. and homogeneous fine pores are formed on the surface of the membrane. Therefore the membrane excellent in water permeability while maintaining fractionation performance is obtained.
    • 5. 发明专利
    • SEPARATING AGENT FOR BIOCHEMICAL SUBSTANCE
    • JPH0199646A
    • 1989-04-18
    • JP25620087
    • 1987-10-13
    • DAICEL CHEM
    • UEDA KAZUYOSHINAKAMURA HIROYUKIMAEDA KAZUO
    • C07H21/04B01J20/26C07H21/00C07H21/02
    • PURPOSE:To obtain the title separating agent capable of separating a biochemical substance selected from pyrogens, nucleic acids, and nucleic acid-related substances with high efficiency with only one operation by composing the agent out of a cross-linked quaternary nitrogen-contg. water-soluble polymer. CONSTITUTION:A water-soluble polymer of the structure having a part wherein four hydrocarbon residues and one acid radical are bonded to a nitrogen atom. is cross-linked in the molecules of a water-soluble polymer, and a cross-linked quaternary nitrogen-contg. water-soluble polymer is obtained. When the obtained polymer is used as the separating agent for a biochemical substance selected from pyrogens, nucleic acids, and nucleic acid-related substances, the biochemical substance can be efficiently separate with only one operation. Furthermore, the separating agent does not dissolve other coexistent chemicals, and is not left in the soln. after separation. Cationic hydroxyalkylcellulose cross-linked with 1,3-dichloro-2-propanol, etc., is most preferably used as the cross-linked quaternary nitrogen-contg. water-soluble polymer.
    • 9. 发明专利
    • Separating agent
    • 分离剂
    • JPS59166502A
    • 1984-09-19
    • JP3955583
    • 1983-03-10
    • Daicel Chem Ind Ltd
    • YUUKI YOUICHIOKAMOTO ICHIROUSHIBATA TOORUNAKAMURA HIROYUKI
    • C07B57/00B01D15/08B01J20/281C07B31/00C07B63/00C07C45/78C07C67/00C08B3/06
    • C07C45/78
    • PURPOSE: To provide a separating agent effective for the separation of optical isomers, by using a crystalline cellulose acetate wherein the main crystal part takes the crystal form of the type-II cellulose triacetate, as an active component.
      CONSTITUTION: For example, the type- I or type-II cellulose is acetylated to obtain a type- I or type-II cellulose triacetate, which is immersed in a swelling agent. A deswelling agent is added slowly to the swelling agent to increase the ratio of the deswelling agent. The crystallization of cellulose triacetate takes place by this process to form a cellulose triacetate having the crystal form of type-II. The obtained product is used as an active component of the objective separating agent.
      COPYRIGHT: (C)1984,JPO&Japio
    • 目的:通过使用主晶体部分以II型纤维素三乙酸酯的结晶形式的结晶纤维素乙酸酯作为有效成分,提供有效分离光学异构体的分离剂。 构成:例如,将I型或II型纤维素乙酰化以获得浸入溶胀剂中的I型或II型纤维素三乙酸酯。 将消溶剂缓慢加入到溶胀剂中以增加消泡剂的比例。 三乙酸纤维素的结晶通过该方法进行以形成具有II型晶型的纤维素三乙酸酯。 所得产物用作目标分离剂的活性组分。