公开(公告)号：JPH09187631A

公开(公告)日：1997-07-22

申请号：JP367496

申请日：1996-01-12

Applicant: TORAY INDUSTRIES

Inventor： SHIRAISHI NORIYOSHI ,  ITO YUKIO ,  FUSAOKA YOSHINARI

IPC: B01D67/00 ,  B01D71/56 ,  B01D71/82

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing the composite semipermeable membrane exhibiting effective high separation performance by using an inexpensive solvent easy to handle without destroying the ozone layer. SOLUTION: This composite semipermeable membrane having an extremely thin membrane is formed as follows. Namely, an aq. soln. of a water-soluble multifunctional reagent is applied on the surface of a porous supporting membrane, a soln. of a multifunctional reagent reacting with the water-soluble multifunctional reagent in an org. solvent immiscible with water is applied, and then the composite semipermeable membrane is radiation-heated or convectionally heated from the rear of the coated surface to remove the org. solvent.

公开(公告)号：JPH09192460A

公开(公告)日：1997-07-29

申请号：JP494996

申请日：1996-01-16

Applicant: TORAY INDUSTRIES

Inventor： SHIRAISHI NORIYOSHI ,  ITO YUKIO ,  FUSAOKA YOSHINARI

IPC: B01D67/00 ,  B01D71/64 ,  B01D71/82

Abstract: PROBLEM TO BE SOLVED: To obtain a laminated semipermeable membrane having high separating performance by coating the surface of a porous support membrane with an aq. soln. of a water-soluble multifunctional reagent, further coating the coated surface with a soln. of a multifunctional reagent reacting with the water- soluble multifunctional reagent dissolved in an org. solvent immiscible with water and removing the solvent. SOLUTION: The surface of a porous support membrane is coated with an aq. soln. of a water-soluble multifunctional reagent such as a multifunctional amine and the coated surface is further coated with a soln. of a multifunctional reagent (e.g., a multifunctional acid halide) reacting with the water soluble multifunctional reagent dissolved in an org. solvent immiscible with water (e.g. hydrocarbon). The membrane is then put in an atmosphere under a pressure below atmospheric pressure to remove the org. solvent. The objective safe and effective laminated semipermeable membrane having high separating performance and ensuring easy recovery of a solvent is obtd. using the low-cost solvent easy to handle and not destroying an ozone layer.

公开(公告)号：JPH11142395A

公开(公告)日：1999-05-28

申请号：JP30567297

申请日：1997-11-07

Applicant: TORAY INDUSTRIES

Inventor： SHIRAISHI NORIYOSHI ,  NOYORI MASARU ,  FUJII YOSHINARI

IPC: G01N33/18 ,  B01D61/02 ,  B01D61/14 ,  B01D71/16 ,  B01D71/26 ,  B01D71/42 ,  B01D71/52 ,  B01D71/56 ,  B01D71/68 ,  C02F1/00 ,  C02F1/44 ,  C02F1/72

Abstract: PROBLEM TO BE SOLVED: To comprehensively grasp oxidation power of atoms in terms of a speed by bringing a polymer compound in touch with original water and evaluating oxidation power of atoms from a characteristic change of the polymer compound. SOLUTION: A preferable polymer compound is an organic polymer compound, particularly, polyacrylonitrile-, polysulfone-based compound an extension, the strength of which can be grasped in a tensile test before and after an oxidation reaction with an oxidizing agent, or the characteristic change of which can be grasped in a comparison evaluation based on a molecular weight or by the like manner. A form of the polymer compound is preferably a separation membrane, more particularly, an inverse osmotic membrane, an ultrafilter membrane. Especially an asymmetric inverse osmotic membrane with an ultrathin layer sharply reacts to oxidizing substances and changes permeation performance, and therefore enables quick and sure evaluation. Although it is a general contact process to dip the polymer compound simply in an original water, the original water is actually passed through the polymer compound if the polymer compound is the separation membrane. This is more preferred because an area of contact between the original water and a hollow fiber membrane is increased and the concentration of the oxidizing substance or the like in the vicinity of the membrane surface is constant at all times.

公开(公告)号：JPH09192461A

公开(公告)日：1997-07-29

申请号：JP495096

申请日：1996-01-16

Applicant: TORAY INDUSTRIES

Inventor： ITO YUKIO ,  SHIRAISHI NORIYOSHI ,  FUSAOKA YOSHINARI

IPC: B01D67/00 ,  B01D71/64 ,  B01D71/82

Abstract: PROBLEM TO BE SOLVED: To obtain a composite semipermeable membrane having high separation capability by applying a water soluble multifunctional reagent aq. solution on the front surface of porous supporting film, further applying a multifunctional reagent dissolved in an organic solvent and reactive with the water soluble multifunctional reagent and then removing the organic solvent with air knives. SOLUTION: The aq. solution of the water soluble multifunctional reagent such as a multifunctional amine is applied on the front surfaces of the porous supporting film by a device 1. Next, a solution prepared by dissolving the multifunctional reagent reactive with the water soluble multifunctional reagent such as a multifunctional acid halide in the hydrocarbon based organic solvent immissible with water is applied by a device 2. After that, the organic solvent is removed by using >=2 stages of air knives 3. Thus the high separation capability composite semipermeable membrane easy to recover the solvent is safely and effectively obtained by using the solvent free from depletion of the ozone layer, low in cost and easy to handle.

公开(公告)号：JPH09187630A

公开(公告)日：1997-07-22

申请号：JP367596

申请日：1996-01-12

Applicant: TORAY INDUSTRIES

Inventor： ITO YUKIO ,  SHIRAISHI NORIYOSHI ,  FUSAOKA YOSHINARI

IPC: B01D67/00 ,  B01D71/64 ,  B01D71/82

Abstract: PROBLEM TO BE SOLVED: To produce a composite semipermeable membrane high in recovering efficiency of a solvent by applying an aq. soln. of a water soluble polyfunctionla reagent on a surface of a porous supporting film, applying a soln. obtd. by dissolving the polyfunctional reagent reacting with the reagent in an org. solvent which is non- miscible with water, then removing the org. solvent under an inert gas atmosphere. SOLUTION: In a production device for the composite semipermeable membrane, after at first applying 1 the aq. soln. of the water soluble polyfunctional reagent on the surface of the porous supporting film 4 transported from a left side, the soln. of the polyfunctional reagent in the org. solvent which is non-miscible with the water is applied 2. Then the soln. of the polyfunctional reagent in the org. solvent which is non-miscible with the water is removed 3 from the composite semipermeable membrane 4. At this time, when a removing device 3 is able to control a temp. of dryer, etc., to keep an inert gas atmosphere by introducing the inert gas 5 and to discharge a gaseous mixture of an evaporated solvent and the inert gas, any device may be good. In this way, the composite semipermeable membrane high in separating performance is obtained by using the solvent which is a hydrocarbon based solvent hardly having ozone breaking coefficient and low in flash point on handling.