JPS5745304A - Production of turbular semipermeable membrane - Google Patents

Production of turbular semipermeable membrane

Info

Publication number
JPS5745304A
JPS5745304A JP12040280A JP12040280A JPS5745304A JP S5745304 A JPS5745304 A JP S5745304A JP 12040280 A JP12040280 A JP 12040280A JP 12040280 A JP12040280 A JP 12040280A JP S5745304 A JPS5745304 A JP S5745304A
Authority
JP
Japan
Prior art keywords
tubular body
water
ventilation
solvent
end side
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP12040280A
Other languages
Japanese (ja)
Other versions
JPS5848202B2 (en
Inventor
Hirotoshi Ishizuka
Sumio Takadono
Hiroshi Iwabori
Tadakuni Kato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nitto Denko Corp
Original Assignee
Nitto Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nitto Electric Industrial Co Ltd filed Critical Nitto Electric Industrial Co Ltd
Priority to JP12040280A priority Critical patent/JPS5848202B2/en
Publication of JPS5745304A publication Critical patent/JPS5745304A/en
Publication of JPS5848202B2 publication Critical patent/JPS5848202B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Separation Using Semi-Permeable Membranes (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

PURPOSE: To obtain superior water permeability and separating characteristics by casting and coating a liquid for making a cellulose acetate film of prescribed rates of acetylation on the inside surface of a tubular body then allowing the solvent in the liquid to evaporate thence solidifying the same in water and further subjecting the same to heat treatment.
CONSTITUTION: Cellulose acetate of 57W60wt% average rates of acetylation are dissolved in an org. solvent, and the soln. is cast and coated on the inside surface of a tubular body. Next, the ventilation treatment from one end side to the other in the tubular body and conversely the ventilation treatment from the other end side to the one end side are executed alternately both at 5W15m/sec ventilation rates more than twice in total of both directions. Thence, 5W20wt% the solvent in the film making liquid is allowed to evaporate, after which the tubular body is immersed in water in a direction reverse from the above-mentioned final ventilation direction. Further, the tubular semipermeable membrane having undergone such immersion in water and solidification is heat-treated at temp. about ≤100°C, whereby the crystallization of the membrane is accelerated, the mechanical strength is increased and the separating performance improved.
COPYRIGHT: (C)1982,JPO&Japio
JP12040280A 1980-08-30 1980-08-30 Method for manufacturing tubular semipermeable membrane Expired JPS5848202B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12040280A JPS5848202B2 (en) 1980-08-30 1980-08-30 Method for manufacturing tubular semipermeable membrane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12040280A JPS5848202B2 (en) 1980-08-30 1980-08-30 Method for manufacturing tubular semipermeable membrane

Publications (2)

Publication Number Publication Date
JPS5745304A true JPS5745304A (en) 1982-03-15
JPS5848202B2 JPS5848202B2 (en) 1983-10-27

Family

ID=14785317

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12040280A Expired JPS5848202B2 (en) 1980-08-30 1980-08-30 Method for manufacturing tubular semipermeable membrane

Country Status (1)

Country Link
JP (1) JPS5848202B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59140237A (en) * 1983-01-31 1984-08-11 Asahi Chem Ind Co Ltd Apparatus for forming porous membrane of hydrophilic polymer
JPS60141733A (en) * 1983-12-29 1985-07-26 Fuji Photo Film Co Ltd Manufacture of fine porous sheet
WO2021235168A1 (en) * 2020-05-19 2021-11-25 ダイセン・メンブレン・システムズ株式会社 Tubular separation membrane and tubular separation membrane module comprising same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59140237A (en) * 1983-01-31 1984-08-11 Asahi Chem Ind Co Ltd Apparatus for forming porous membrane of hydrophilic polymer
JPH0366338B2 (en) * 1983-01-31 1991-10-17 Asahi Chemical Ind
JPS60141733A (en) * 1983-12-29 1985-07-26 Fuji Photo Film Co Ltd Manufacture of fine porous sheet
WO2021235168A1 (en) * 2020-05-19 2021-11-25 ダイセン・メンブレン・システムズ株式会社 Tubular separation membrane and tubular separation membrane module comprising same
JP7021400B1 (en) * 2020-05-19 2022-02-16 ダイセン・メンブレン・システムズ株式会社 Tubular separation membrane and tubular separation membrane module containing it
JP2022036298A (en) * 2020-05-19 2022-03-04 ダイセン・メンブレン・システムズ株式会社 Tubular type separation membrane and tubular type separation membrane module including the same

Also Published As

Publication number Publication date
JPS5848202B2 (en) 1983-10-27

Similar Documents

Publication Publication Date Title
US5342521A (en) Reverse osmosis or nanofiltration membrane and its production process
ATE12589T1 (en) HIGH PERFORMANCE SEMI-PERMEABLE COMPOSITE MEMBRANE AND METHOD OF PRODUCTION.
JPS56126408A (en) Semipermeable membrane and its production
JPS5745304A (en) Production of turbular semipermeable membrane
JPS57159587A (en) Sterilization and purification of water
JP3261761B2 (en) Method for producing polyvinylidene fluoride porous membrane
JPS5566935A (en) Production of porous vinylidene fluoride resin membrane
JPS5455623A (en) Hollow fiber and its production
JPS5726560A (en) Filtration of soysauce sediment
JPS5249248A (en) Reverse osmotic treatment of water-soluble electro-deposition coating
JPS5794310A (en) Production of semipermeable membrane made of polysulfone
JPS57206378A (en) Filtering method of sake
JPS5750506A (en) Polysulfone semipermeable membrane and its production
JPS52143974A (en) Membraneous separation equipment
JPS5750507A (en) Permselective membrane and its production
JPS5791707A (en) Composite semipermeable membrane and method for producing the same
JPS5691803A (en) Semipermeable membrane and its manufacture
JPS5621605A (en) Separation of liquid by semipermeable composite membrane consisting of furufryl alcohol polymer
JPS55145541A (en) Ion selective adsorption compound semipermeable membrane and its production
JPS57159503A (en) Composite semi-permeable membrane and preparation thereof
JPS57119928A (en) Ion-permeable amphoteric composite membrane
NL7812664A (en) Filtration membranes esp. of cellulose acetate - made by casting a polymer soln. contg. a water miscible solvent and successive coagulation in cold and warmer aq. baths
JPS54123583A (en) Treating method for semipermeable membrane
JPS6148965B2 (en)
JPS56144195A (en) Manufacture of supporter for lithographic plate