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 osmosisInfo
- 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
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.
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)
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)
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 |
-
1973
- 1973-07-31 FR FR7328074A patent/FR2194551A1/en active Granted
- 1973-07-31 DE DE19732338786 patent/DE2338786A1/en active Pending
- 1973-07-31 JP JP8552973A patent/JPS4950289A/ja active Pending
Cited By (2)
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 |
DE2338786A1 (en) | 1974-02-14 |
FR2194551B3 (en) | 1976-07-16 |
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