GB642025A - Electrodecantation of dilute suspensions - Google Patents
Electrodecantation of dilute suspensionsInfo
- Publication number
- GB642025A GB642025A GB17602/48A GB1760248A GB642025A GB 642025 A GB642025 A GB 642025A GB 17602/48 A GB17602/48 A GB 17602/48A GB 1760248 A GB1760248 A GB 1760248A GB 642025 A GB642025 A GB 642025A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cell
- diaphragms
- suspension
- pipe
- spaced
- 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.)
- Expired
Links
- 239000000725 suspension Substances 0.000 title abstract 8
- 239000000084 colloidal system Substances 0.000 abstract 3
- -1 polytetrafluoroethylene Polymers 0.000 abstract 2
- 150000001298 alcohols Chemical class 0.000 abstract 1
- 239000007900 aqueous suspension Substances 0.000 abstract 1
- 230000001112 coagulating effect Effects 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 abstract 1
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 abstract 1
- 239000006260 foam Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract 1
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract 1
- 159000000000 sodium salts Chemical class 0.000 abstract 1
- 235000011149 sulphuric acid Nutrition 0.000 abstract 1
- 239000001117 sulphuric acid Substances 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
- B01D61/44—Ion-selective electrodialysis
- B01D61/46—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
- B01D61/425—Electro-ultrafiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/0004—Preparation of sols
- B01J13/0039—Post treatment
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F6/00—Post-polymerisation treatments
- C08F6/14—Treatment of polymer emulsions
- C08F6/20—Concentration
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Urology & Nephrology (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
642,025. Electrolytic concentration of suspensions. DU PONT DE NEMOURS & CO., E.I. June 30, 1948, No. 17602. Convention date, Oct. 31, 1947. [Class 41] A cell 1 with rubber or similarly lined walls is provided with spaced electrodes 2 connected to a source of direct current, a plurality of spaced diaphragms 5 impervious to colloids, means to feed dilute aqueous suspension to the cell, means to collect concentrated suspension from the cell, and means to recycle a portion of moderately-concentrated suspension to the cell for further concentration. As shown, the dilute suspension is contained in a reservoir 6, from which it is fed to the cell by a pipe 7 and a manifold 10. The diaphragms 5 are spaced from the sides, top and bottom of the cell, except for the two rod diaphragms 5A, which extend to the sides and bottom. The diaphragms may be formed from a single sheet of material interlaced around vertical supports. When current is passed through the suspension, the colloid particles on their way to the anode are stopped by the diaphragms and fall to the bottom of the cell. The current is reversed periodically and prevents the colloids from coagulating on the diaphragms. The concentrate is led by a pipe 14 to a reservoir 11 from which a pipe 13 leads back to an injector 12 in the pipe 7 conveying suspension to the cell 1. Clear liquid is drawn from the cell through pipes 15 and foam caused by gases formed is withdrawn through suction pipes 16. The suspension may be polytetrafluoroethylene stabilized with-the sodium salt of the sulphuric acid ester of a mixture of long-chain alcohols, predominantly lauryl alcohol. Specification 492,030 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US642025XA | 1947-10-31 | 1947-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB642025A true GB642025A (en) | 1950-08-23 |
Family
ID=22054253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17602/48A Expired GB642025A (en) | 1947-10-31 | 1948-06-30 | Electrodecantation of dilute suspensions |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB642025A (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2878178A (en) * | 1955-04-15 | 1959-03-17 | Bier Milan | Continuous free-boundary flow electrophoresis |
| US4369266A (en) | 1979-03-01 | 1983-01-18 | Hoechst Aktiengesellschaft | Concentrated dispersions of fluorinated polymers and process for their preparation |
| US5219910A (en) * | 1991-07-20 | 1993-06-15 | Hoechst Aktiengesellschaft | Concentrated aqueous dispersions of tetrafluoroethylene polymers, and process for their preparation |
| US6696512B2 (en) | 2001-01-18 | 2004-02-24 | Ausimont S.P.A. | Aqueous dispersions of fluoropolymers |
| US6861466B2 (en) | 2003-02-28 | 2005-03-01 | 3M Innovative Properties Company | Fluoropolymer dispersion containing no or little low molecular weight fluorinated surfactant |
| US7041728B2 (en) | 2003-11-17 | 2006-05-09 | 3M Innovative Properties Company | Aqueous dispersions of polytetrafluoroethylene having a low amount of fluorinated surfactant |
| US7342066B2 (en) | 2003-10-24 | 2008-03-11 | 3M Innovative Properties Company | Aqueous dispersions of polytetrafluoroethylene particles |
| US7659333B2 (en) | 2005-11-24 | 2010-02-09 | 3M Innovative Properties Company | Fluorinated surfactants for use in making a fluoropolymer |
| US7671112B2 (en) | 2005-07-15 | 2010-03-02 | 3M Innovative Properties Company | Method of making fluoropolymer dispersion |
| US7728087B2 (en) | 2005-12-23 | 2010-06-01 | 3M Innovative Properties Company | Fluoropolymer dispersion and method for making the same |
| US7754795B2 (en) | 2006-05-25 | 2010-07-13 | 3M Innovative Properties Company | Coating composition |
| US7776946B2 (en) | 2005-07-15 | 2010-08-17 | 3M Innovative Properties Company | Aqueous emulsion polymerization of fluorinated monomers using a fluorinated surfactant |
| US7838608B2 (en) | 2005-12-21 | 2010-11-23 | 3M Innovative Properties Company | Fluorinated surfactants for making fluoropolymers |
| US8119750B2 (en) | 2006-07-13 | 2012-02-21 | 3M Innovative Properties Company | Explosion taming surfactants for the production of perfluoropolymers |
| JP2012102252A (en) * | 2010-11-11 | 2012-05-31 | Asahi Glass Co Ltd | Method for producing high concentration aqueous polytetrafluoroethylene dispersion and electric concentration tank |
| US8404790B2 (en) | 2005-07-15 | 2013-03-26 | 3M Innovative Properties Company | Aqueous emulsion polymerization process for producing fluoropolymers |
| US8598267B2 (en) | 2001-09-05 | 2013-12-03 | 3M Innovative Properties Company | Fluoropolymer dispersion containing no or little low molecular weight fluorinated surfactant |
| US8937112B2 (en) * | 2006-05-31 | 2015-01-20 | E I Du Pont De Nemours And Company | Concentrated fluoropolymer dispersions stabilized with anionic polyelectrolyte dispersing agents |
-
1948
- 1948-06-30 GB GB17602/48A patent/GB642025A/en not_active Expired
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2878178A (en) * | 1955-04-15 | 1959-03-17 | Bier Milan | Continuous free-boundary flow electrophoresis |
| US4369266A (en) | 1979-03-01 | 1983-01-18 | Hoechst Aktiengesellschaft | Concentrated dispersions of fluorinated polymers and process for their preparation |
| US5219910A (en) * | 1991-07-20 | 1993-06-15 | Hoechst Aktiengesellschaft | Concentrated aqueous dispersions of tetrafluoroethylene polymers, and process for their preparation |
| EP0524585B1 (en) * | 1991-07-20 | 1997-03-26 | Dyneon GmbH | Concentrated aqueous dispersions of tetrafluoroethylene-polymers, process for making same and their use |
| US6696512B2 (en) | 2001-01-18 | 2004-02-24 | Ausimont S.P.A. | Aqueous dispersions of fluoropolymers |
| US8598267B2 (en) | 2001-09-05 | 2013-12-03 | 3M Innovative Properties Company | Fluoropolymer dispersion containing no or little low molecular weight fluorinated surfactant |
| US6861466B2 (en) | 2003-02-28 | 2005-03-01 | 3M Innovative Properties Company | Fluoropolymer dispersion containing no or little low molecular weight fluorinated surfactant |
| US7342066B2 (en) | 2003-10-24 | 2008-03-11 | 3M Innovative Properties Company | Aqueous dispersions of polytetrafluoroethylene particles |
| US7041728B2 (en) | 2003-11-17 | 2006-05-09 | 3M Innovative Properties Company | Aqueous dispersions of polytetrafluoroethylene having a low amount of fluorinated surfactant |
| US7294668B2 (en) | 2003-11-17 | 2007-11-13 | 3M Innovative Properties Company | Aqueous dispersions of polytetrafluoroethylene having a low amount of fluorinated surfactant |
| US7671112B2 (en) | 2005-07-15 | 2010-03-02 | 3M Innovative Properties Company | Method of making fluoropolymer dispersion |
| US7776946B2 (en) | 2005-07-15 | 2010-08-17 | 3M Innovative Properties Company | Aqueous emulsion polymerization of fluorinated monomers using a fluorinated surfactant |
| US8222322B2 (en) | 2005-07-15 | 2012-07-17 | 3M Innovative Properties Company | Method of making fluoropolymer dispersion |
| US8404790B2 (en) | 2005-07-15 | 2013-03-26 | 3M Innovative Properties Company | Aqueous emulsion polymerization process for producing fluoropolymers |
| US8614265B2 (en) | 2005-07-15 | 2013-12-24 | 3M Innovative Properties Company | Method of making fluoropolymer dispersion |
| US7659333B2 (en) | 2005-11-24 | 2010-02-09 | 3M Innovative Properties Company | Fluorinated surfactants for use in making a fluoropolymer |
| US7838608B2 (en) | 2005-12-21 | 2010-11-23 | 3M Innovative Properties Company | Fluorinated surfactants for making fluoropolymers |
| US7728087B2 (en) | 2005-12-23 | 2010-06-01 | 3M Innovative Properties Company | Fluoropolymer dispersion and method for making the same |
| US7754795B2 (en) | 2006-05-25 | 2010-07-13 | 3M Innovative Properties Company | Coating composition |
| US8937112B2 (en) * | 2006-05-31 | 2015-01-20 | E I Du Pont De Nemours And Company | Concentrated fluoropolymer dispersions stabilized with anionic polyelectrolyte dispersing agents |
| US8119750B2 (en) | 2006-07-13 | 2012-02-21 | 3M Innovative Properties Company | Explosion taming surfactants for the production of perfluoropolymers |
| JP2012102252A (en) * | 2010-11-11 | 2012-05-31 | Asahi Glass Co Ltd | Method for producing high concentration aqueous polytetrafluoroethylene dispersion and electric concentration tank |
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