公开(公告)号：JPH10249343A

公开(公告)日：1998-09-22

申请号：JP5609497

申请日：1997-03-11

Applicant: TORAY INDUSTRIES

Inventor： JIYOU KUNITAKA ,  SHIMIZU HIDEHIRO

IPC: B01D61/16 ,  B01D71/10 ,  B01D71/26 ,  B01D71/42 ,  B01D71/68 ,  C02F1/44 ,  C02F1/64 ,  C02F1/76

Abstract: PROBLEM TO BE SOLVED: To stabilize the performance of a manganese-removing filter membrane device, to prolong the service life of the membrane and to reduce the operation cost of the device by adopting an operating method controlling copper concn. to be low. SOLUTION: In this water treating method, when the water is treated with the filter membrane after adding an oxidizing agent to the raw water containing >=0.01ppm manganese ion, the filter membrane is operated so that the copper concn. in a feed water just before in contact with the filter membrane or in a filtered water is

公开(公告)号：JPH0665809A

公开(公告)日：1994-03-08

申请号：JP20631291

申请日：1991-07-23

Applicant: TORAY INDUSTRIES

Inventor： SHIMIZU HIDEHIRO ,  HENMI MASAHIRO ,  YOSHIOKA TOSHIO

IPC: B01D69/08 ,  B01D71/42 ,  D01F6/18

Abstract: PURPOSE:To provide the subject hollow fiber membrane useful as, e.g. a filtration membrane to which a liquid to be treated is fed from the outside, consisting of an acrylonitrile-based polymer of ultrahigh-polymerization degree, made up of a dense layer as the outermost layer and the inner layer having large voids communicating with the inner surface, excellent in water penetrability and mechanical strength. CONSTITUTION:An acrylonitrile-based polymer of ultrahigh-polymerization degree is dissolved in dimethylsulfoxide to prepare a spinning dope with a polymer concentration of 8.0wt.%. The dope is then delivered, using a spinneret for sheath-core type hollow fibers, through the sheath part thereof while injecting a 80wt.% aqueous dimethylsulfoxide solution as coagulating liquid through the core part, and the filament yarns delivered are passed through air and introduced into a coagulating water bath kept at 60 deg.C to remove the solvent at 60 deg.C, thus obtaining the objective hollow fiber membrane made up of (A) a dense layer having pore diameter of

公开(公告)号：JPH04190837A

公开(公告)日：1992-07-09

申请号：JP31877990

申请日：1990-11-22

Applicant: TORAY INDUSTRIES

Inventor： HENMI MASAHIRO ,  SHIMIZU HIDEHIRO ,  YOSHIOKA TOSHIO

IPC: B01D71/34 ,  B01D71/82

Abstract: PURPOSE:To obtain a porous membrane having sulfonic acid groups enough to effect cation exchange by processing a poly(vinylidene fluoride)resin porous membrane with a mixture of sulfuric acid anhydride, and dry air or inert gas. CONSTITUTION:By processing a poly(vinylidene fluoride) resin porous membrane with a mixture of sulfuric acid anhydride, and dry air or inert gas, a crosslinked sulfonated poly(vinylidene fluoride) resin porous membrane is produced. A melt membrane formation method of this membrane is such that molten polymer is delivered in the form of a flat membrane or a hollow fiber membrane and stretched to form a porous structure. Crosslinked sulfonating reaction depends on temperature of sulfuric acid anhydride, reaction temperature and reaction time and by controlling these factors, a crosslinked sulfonated porous membrane can be produced. As methods for producing such membranes, there are batch method, continuous method, etc.

公开(公告)号：JPH03143534A

公开(公告)日：1991-06-19

申请号：JP27928989

申请日：1989-10-26

Applicant: TORAY INDUSTRIES

Inventor： HENMI MASAHIRO ,  SHIMIZU HIDEHIRO ,  YOSHIOKA TOSHIO

IPC: B01D63/02 ,  B01D67/00 ,  B01D69/00 ,  B01D71/34 ,  B01D71/42 ,  B01D71/68 ,  C08J9/34 ,  C08J9/40 ,  D01F6/00 ,  D01F6/18

Abstract: PURPOSE:To obtain the porous membrane with the water permeability not decreased even after dried and excellent in handlability by forming a dense layer on the surface of one side of the membrane, gradually increasing the diameter of the pore toward the other side, eliminating giant closed cells and depositing a surfactant on the membrane. CONSTITUTION:The surface of one side of the membrane consists of a dense layer having =5mum or further >=10mum diameter, and a surfactant is deposited on the membrane. Consequently, the water permeability of the membrane is not changed even when dried, foaming is not caused when the end of the hollow-fiber bundle is sealed with an adhesive to produce the module, and leakage is not caused.

公开(公告)号：JPH06126278A

公开(公告)日：1994-05-10

申请号：JP27998292

申请日：1992-10-19

Applicant: TORAY INDUSTRIES

Inventor： NOYORI MASARU ,  YOSHIOKA TOSHIO ,  SHIMIZU HIDEHIRO

IPC: B01J47/12 ,  C02F1/28 ,  C02F1/42 ,  C02F1/44

Abstract: PURPOSE:To provide a water purifying apparatus capable of absorbing and removing a harmful component in drinking water, a malodorous component and fungi, and obtaining taste water for a long period. CONSTITUTION:The water purifying apparatus has an ion-exchange body as a water purifying component, and the ion type of the exchange group of the ion-exchange body is a mixture form of one or more kinds selected from Fe, Ca Mg, Ag, K, Ni and Co.

公开(公告)号：JPH04338234A

公开(公告)日：1992-11-25

申请号：JP10752891

申请日：1991-05-13

Applicant: TORAY INDUSTRIES

Inventor： NOYORI MASARU ,  SHIMIZU HIDEHIRO ,  OKAZAKI OSAMU

IPC: A24D3/08 ,  B01D53/04 ,  B01J20/26 ,  B01J20/28

Abstract: PURPOSE:To obtain the sheet-like absorbent which has a large adsorption surface area, allows the easy and inexpensive selective adsorption of materials to be adsorbed and has excellent workability to filters by forming a sheet-like material of extremely fine fibers consisting of a polymonovinyl arom. compd. having specified or lower single fiber fineness. CONSTITUTION:Three-component conjugate fibers consisting of a sea component of polyester, etc., an island-sheath component of polystyrene, etc., and an island- core component of polypropylene, etc., are crimped by a crimper. The fibers are then fabricated to felt shape after cutting. This felt is subjected to the hydrolysis of the polyester with an alkali, such as aq. sodium hydroxide soln. The sea component of the sea and island type three-component conjugate fibers is dissolved to obtain the extremely fine fibers in such a manner, by which the signal fiber fineness is reduced to

公开(公告)号：JPH03140353A

公开(公告)日：1991-06-14

申请号：JP27928889

申请日：1989-10-26

Applicant: TORAY INDUSTRIES

Inventor： HENMI MASAHIRO ,  SHIMIZU HIDEHIRO ,  YOSHIOKA TOSHIO

IPC: B01D71/32 ,  B01D71/34 ,  B01D71/52 ,  B01D71/82 ,  B01J20/26 ,  B01J39/20 ,  B01J41/14 ,  B01J45/00 ,  C08J5/00 ,  C08L27/14 ,  C08L27/16 ,  D01F6/12

Abstract: PURPOSE:To obtain a molded article of fluorine resin useful in fields of water treatment or purification of drug, etc., having excellent heat resistance, chemical resistance, shape-enduing property, ion-exchange property, adsorbing property and separating property comprising fluorine resin having aromatic compound in side chain through ether bonding. CONSTITUTION:(A) At least one compound expressed by formula I to formula V (Rf is fluoroalkyl group) and vinyl-based fluorine resin containing CH2 (preferably polyvinylidene fluoride, etc.) are molded to any shape (preferably porous membrane) from molten or solution state and subjected to reaction treatment in the presence of aromatic alkyl alcohol and basic compound to afford a molded article of fluorine resin having aromatic compound in side chain through ether bonding. Otherwise, (B) cation-exchange group (e.g., sulfonic acid group), anion-exchange group, chelateexchange group or crown ether group is further introduced into aromatic compound in the side chain of the composition A to afford the second aimed molded article of fluorine resin.