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FR2194551A1 - Hollow cellulose ester filaments prodn - for water purification by low pressu-re reverse osmosis - Google Patents

Hollow cellulose ester filaments prodn - for water purification by low pressu-re reverse osmosis

Info

Publication number
FR2194551A1
FR2194551A1 FR7328074A FR7328074A FR2194551A1 FR 2194551 A1 FR2194551 A1 FR 2194551A1 FR 7328074 A FR7328074 A FR 7328074A FR 7328074 A FR7328074 A FR 7328074A FR 2194551 A1 FR2194551 A1 FR 2194551A1
Authority
FR
France
Prior art keywords
filaments
reverse osmosis
cellulose ester
prodn
water purification
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
FR7328074A
Other languages
French (fr)
Other versions
FR2194551B3 (en
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.)
Monsanto Co
Original Assignee
Monsanto Co
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 Monsanto Co filed Critical Monsanto Co
Publication of FR2194551A1 publication Critical patent/FR2194551A1/en
Application granted granted Critical
Publication of FR2194551B3 publication Critical patent/FR2194551B3/fr
Granted legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/08—Hollow fibre membranes
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/06—Wet spinning methods
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
    • D01F2/24—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives
    • D01F2/28—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives from organic cellulose esters or ethers, e.g. cellulose acetate

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Artificial Filaments (AREA)

Abstract

The filaments are produced by extruding a soln. of 25-35 (wt.)% cellulose ester in a solvent mixt. of 35-100% dioxan, 0-35% formamide and 0-35% acetone, the soln. being extruded through a die into an evapn. zone, enriched with the solvent, for a residence time of 0.01-1.0 sec. after which the filaments are immersed in an aq. coagulating bath at 0-50 degrees C, opt. contg. >=11 wt.% Lewis acid, and the acid filaments are washed and wound up. They are used for hollow fibres membranes for removing divalent salts from 'hard' water by reverse osmosis, allowing much lower operating pressures.
FR7328074A 1972-08-01 1973-07-31 Hollow cellulose ester filaments prodn - for water purification by low pressu-re reverse osmosis Granted FR2194551A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27698372A 1972-08-01 1972-08-01

Publications (2)

Publication Number Publication Date
FR2194551A1 true FR2194551A1 (en) 1974-03-01
FR2194551B3 FR2194551B3 (en) 1976-07-16

Family

ID=23058956

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7328074A Granted FR2194551A1 (en) 1972-08-01 1973-07-31 Hollow cellulose ester filaments prodn - for water purification by low pressu-re reverse osmosis

Country Status (3)

Country Link
JP (1) JPS4950289A (en)
DE (1) DE2338786A1 (en)
FR (1) FR2194551A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2395060A1 (en) * 1977-06-20 1979-01-19 Asahi Chemical Ind HOLLOW FIBER MEMBRANES FOR ULTRAFILTRATION AND THEIR PREPARATION PROCESS
EP0008536A1 (en) * 1978-08-22 1980-03-05 Mitsubishi Rayon Co., Ltd. Process for manufacturing regenerated cellulose hollow fiber

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1141114A (en) 1978-11-24 1983-02-15 Masamichi Ishida Regenerated cellulose hollow fiber and process for manufacturing same
US5181940A (en) * 1991-08-01 1993-01-26 Union Carbide Industrial Gases Technology Corporation Hollow fiber membranes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2395060A1 (en) * 1977-06-20 1979-01-19 Asahi Chemical Ind HOLLOW FIBER MEMBRANES FOR ULTRAFILTRATION AND THEIR PREPARATION PROCESS
EP0008536A1 (en) * 1978-08-22 1980-03-05 Mitsubishi Rayon Co., Ltd. Process for manufacturing regenerated cellulose hollow fiber

Also Published As

Publication number Publication date
JPS4950289A (en) 1974-05-15
FR2194551B3 (en) 1976-07-16
DE2338786A1 (en) 1974-02-14

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