CA1226081A - Method and apparatus for reducing the aluminum content of alkaline solutions - Google Patents
Method and apparatus for reducing the aluminum content of alkaline solutionsInfo
- Publication number
- CA1226081A CA1226081A CA000444212A CA444212A CA1226081A CA 1226081 A CA1226081 A CA 1226081A CA 000444212 A CA000444212 A CA 000444212A CA 444212 A CA444212 A CA 444212A CA 1226081 A CA1226081 A CA 1226081A
- Authority
- CA
- Canada
- Prior art keywords
- precipitating agent
- housing
- reactor
- alkaline
- aluminum
- 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
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000012670 alkaline solution Substances 0.000 title claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- 230000001376 precipitating effect Effects 0.000 claims abstract description 20
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims abstract description 7
- 150000001342 alkaline earth metals Chemical class 0.000 claims abstract description 7
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 5
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 5
- 150000004679 hydroxides Chemical class 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 5
- 239000008151 electrolyte solution Substances 0.000 claims description 5
- 239000000243 solution Substances 0.000 abstract description 10
- 238000003487 electrochemical reaction Methods 0.000 abstract 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 5
- 229940021013 electrolyte solution Drugs 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910001570 bauxite Inorganic materials 0.000 description 2
- 238000010494 dissociation reaction Methods 0.000 description 2
- 230000005593 dissociations Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- SHXWCVYOXRDMCX-UHFFFAOYSA-N 3,4-methylenedioxymethamphetamine Chemical compound CNC(C)CC1=CC=C2OCOC2=C1 SHXWCVYOXRDMCX-UHFFFAOYSA-N 0.000 description 1
- 244000298715 Actinidia chinensis Species 0.000 description 1
- 235000009434 Actinidia chinensis Nutrition 0.000 description 1
- 235000009436 Actinidia deliciosa Nutrition 0.000 description 1
- 238000004131 Bayer process Methods 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 241000110847 Kochia Species 0.000 description 1
- 241000282320 Panthera leo Species 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/24—Alkaline accumulators
- H01M10/26—Selection of materials as electrolytes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/14—Removing waste, e.g. labels, from cleaning liquid
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D1/00—Oxides or hydroxides of sodium, potassium or alkali metals in general
- C01D1/04—Hydroxides
- C01D1/28—Purification; Separation
- C01D1/32—Purification; Separation by absorption or precipitation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5227—Processes for facilitating the dissolution of solid flocculants in water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/346—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from semiconductor processing, e.g. waste water from polishing of wafers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Removal Of Specific Substances (AREA)
- Hybrid Cells (AREA)
- Primary Cells (AREA)
- Secondary Cells (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Method and apparatus for reducing the aluminum content of an alkaline solution. Said solution being treated with a precipitating agent which is selected from the hydroxides of alkaline earth metals, preferably a solid form of calcium hydroxide, the novel method permitting the alkaline solution to maintain a low aluminum content, aluminum being undesirable for solutions used in electrochemical reactions such as in batteries having aluminum anodes.
Method and apparatus for reducing the aluminum content of an alkaline solution. Said solution being treated with a precipitating agent which is selected from the hydroxides of alkaline earth metals, preferably a solid form of calcium hydroxide, the novel method permitting the alkaline solution to maintain a low aluminum content, aluminum being undesirable for solutions used in electrochemical reactions such as in batteries having aluminum anodes.
Description
~2~6~
The present invention relates to a method and an appear-anus for reducing the aluminum content of an alkaline electrolyte solution of a battery having an aluminum anode, which comprises adding a precipitating agent selected from the group consisting of hydroxides of alkaline earth metals and to an apparatus for carrying out this method.
In one method of this general type, which has become known from the Bayer process, bauxite, for the purpose of induct-really producing pure aluminum oxide, is dissolved in an autoclave by being mixed with hot sodium hydroxide, whereby the aluminum hydroxide contained in the bauxite goes into solution as acuminate, which is then dissociated either by the introduction of carbon dioxide, or by "stirring out" with already produced aluminum hydroxide. The dissociation during stirring out is based on the fact that the acuminate solution obtained during heating in the autoclave is metastable after being cooled off and diluted. The added aluminum hydroxide accelerates the dissociation of the acuminate in that it delivers the seed of crystallation for the precipitation of the aluminum hydroxide formed from the acuminate.
A similar crystallization process takes place in alkaline electrolyte solutions, such as those used, for example, in batter-its having aluminum anodes.
However, due to considerably varying concentration ranges and also Al/OH ratios, inadequate precipitation is obtained with these heretofore known methods. The enrichment of -the electrolyte with aluminum hydroxide actually leads to undesirable Jo I
disturbances not only in the eleetrochemieal reaction and material conversion, but also in the teehnical-function~ area, since as the viscosity increases, pumps in conduits, for example, become more quickly clogged.
The present invention is directed to providing a method and an apparatus of the aforementioned general type, the effective-news of which is assured even under those conditions which exist, for example, in electrolytes of Al/02 cells.
According to the present invention, there is provided a method of reducing the aluminum content of an alkaline electron lyre solution of a battery having an aluminum anode, said method comprising adding a precipitating agent which is selected from the group consisting of hydroxides of alkaline earth metals.
In another aspect, the invention provides an apparatus for reducing the aluminum content of alkaline solutions, said apparatus comprising a reactor, the reactor having a housing for containing a precipitating agent which is a hydroxide of an alga-line earth metal, said reactor housing being provided with an inlet and an outlet for receipt of and withdrawal of such an alkaline solution.
With the present invention there occurs precipitation of an acuminate of an alkaline earth metal, which, in contrast to sodium acuminate, is insoluble. The effectiveness occurs after a relatively short period of time, and can even be detected with minimal Al/OH ratios After a certain period of time, the alumina ate or hydroxide concentration of the solution achieves an assent-tally constant value.
_ 2 ~;2;;~6 018~L
With the preferred addition of the precipitating agent as a solid, there occurs a solid material reaction, which quantity actively can be very precisely predetermined.
Pursuant to expedient embodiments of the present invent lion, the addition of the precipitating agent may be effected at high temperatures. The precipitating agent itself may comprise calcium hydroxide.
When viewed in the direction of flow, a filter may be connected subsequent to the precipitating agent. The housing of the reactor may be cartridge shaped, and may be provided with essentially diametrically arranged inlets and outlets when viewed in the longitudinal direction thereof.
It has been discovered that a precipitating agent which comprises a hydroxide of an alkaline earth metal can be used, in particular for reducing the aluminum content of alkaline electron lyre solutions in batteries having aluminum anodes. As a result, the operational efficiency of electrochemical cells is signific-aptly improved, and their useful life is increased. At the same time, a saving in the amount of electrolyte which is required can be achieved. This can ultimately have a favorable effect on the dimensions of an appropriate installation.
The present invention, will be more clearly understood from the following description of specific embodiments, given by way of example only, and taken in conjunction with the accompany-in drawing, in which:
Figure 1 is a schematic sectional view of one embodiment of the apparatus of the present invention; and I: if, , I
Figure 2 is a schematic overall view of an electrochem-teal cell installation having integrated therein an apparatus similar to that of Figure 1.
Referring now to the drawing in detail, as shown in Figure 1, the apparatus comprises a reactor 10, the housing 11 is owe cartridge type form. The ends of -the cylindrical interior of the reactor 10 are closed off by a bottom 12 and a top 13, which are connected to the wall of the housing via seals 14. An inlet connection 15 is provided in the bottom 12 for the supply of alga-line solution, and an outlet connection 16 is provided in the top - pa -~LZ2~18~
for the withdrawal of alkaline solution. In the lower portion of the interior of the housing there is located a precipitating agent 17 in the form of solid material of crushed calcium hydroxide from marble. The solid precipitating agent 17 is separated from the inlet by means of a liquid distributor 18. A
filter element 19 is placed above the precipitating agent 17 in the housing 11; the filter element 19 is held by means of retainers 20. Glass wool is preferred as a suitable filter material.
Figure 2 shows an installation for producing electrical energy, and comprises an electrochemical cell 21, a closed conduit system 22 for the electrolyte solution, a cooler 23, and a tank 24. Also provided is a reactor 25, the construction of which essentially corresponds to the apparatus of Figure 1. The reactor 25 is connected to the tank 24 by means of a conduit system 26 which is connected in parallel. The reactor 25 can, of course, also be connected in series (not illustrated) between the cooler 23 and the tank 24.
The electrochemical cell 21 preferably comprises a battery having an aluminum anode. Potassium hydroxide is preferred as the electrolyte solution.
The manner of operation of the present invention is illustrated by the following test performance.
For an Al/02 cell a 6.5 Mow KOCH solution is enriched at 80C with Allah until a concentration of about 3 Molehill is achieved. After the electron lyre solution is cooled to about 60C, 2 Molly g) Kiwi were added.
Thereafter, at certain intervals, the values shown in the following table were ascertained:
~Z~8~
Sample i V(mv) Pam I
1 0.0 - 59.68 142.5 2.64
The present invention relates to a method and an appear-anus for reducing the aluminum content of an alkaline electrolyte solution of a battery having an aluminum anode, which comprises adding a precipitating agent selected from the group consisting of hydroxides of alkaline earth metals and to an apparatus for carrying out this method.
In one method of this general type, which has become known from the Bayer process, bauxite, for the purpose of induct-really producing pure aluminum oxide, is dissolved in an autoclave by being mixed with hot sodium hydroxide, whereby the aluminum hydroxide contained in the bauxite goes into solution as acuminate, which is then dissociated either by the introduction of carbon dioxide, or by "stirring out" with already produced aluminum hydroxide. The dissociation during stirring out is based on the fact that the acuminate solution obtained during heating in the autoclave is metastable after being cooled off and diluted. The added aluminum hydroxide accelerates the dissociation of the acuminate in that it delivers the seed of crystallation for the precipitation of the aluminum hydroxide formed from the acuminate.
A similar crystallization process takes place in alkaline electrolyte solutions, such as those used, for example, in batter-its having aluminum anodes.
However, due to considerably varying concentration ranges and also Al/OH ratios, inadequate precipitation is obtained with these heretofore known methods. The enrichment of -the electrolyte with aluminum hydroxide actually leads to undesirable Jo I
disturbances not only in the eleetrochemieal reaction and material conversion, but also in the teehnical-function~ area, since as the viscosity increases, pumps in conduits, for example, become more quickly clogged.
The present invention is directed to providing a method and an apparatus of the aforementioned general type, the effective-news of which is assured even under those conditions which exist, for example, in electrolytes of Al/02 cells.
According to the present invention, there is provided a method of reducing the aluminum content of an alkaline electron lyre solution of a battery having an aluminum anode, said method comprising adding a precipitating agent which is selected from the group consisting of hydroxides of alkaline earth metals.
In another aspect, the invention provides an apparatus for reducing the aluminum content of alkaline solutions, said apparatus comprising a reactor, the reactor having a housing for containing a precipitating agent which is a hydroxide of an alga-line earth metal, said reactor housing being provided with an inlet and an outlet for receipt of and withdrawal of such an alkaline solution.
With the present invention there occurs precipitation of an acuminate of an alkaline earth metal, which, in contrast to sodium acuminate, is insoluble. The effectiveness occurs after a relatively short period of time, and can even be detected with minimal Al/OH ratios After a certain period of time, the alumina ate or hydroxide concentration of the solution achieves an assent-tally constant value.
_ 2 ~;2;;~6 018~L
With the preferred addition of the precipitating agent as a solid, there occurs a solid material reaction, which quantity actively can be very precisely predetermined.
Pursuant to expedient embodiments of the present invent lion, the addition of the precipitating agent may be effected at high temperatures. The precipitating agent itself may comprise calcium hydroxide.
When viewed in the direction of flow, a filter may be connected subsequent to the precipitating agent. The housing of the reactor may be cartridge shaped, and may be provided with essentially diametrically arranged inlets and outlets when viewed in the longitudinal direction thereof.
It has been discovered that a precipitating agent which comprises a hydroxide of an alkaline earth metal can be used, in particular for reducing the aluminum content of alkaline electron lyre solutions in batteries having aluminum anodes. As a result, the operational efficiency of electrochemical cells is signific-aptly improved, and their useful life is increased. At the same time, a saving in the amount of electrolyte which is required can be achieved. This can ultimately have a favorable effect on the dimensions of an appropriate installation.
The present invention, will be more clearly understood from the following description of specific embodiments, given by way of example only, and taken in conjunction with the accompany-in drawing, in which:
Figure 1 is a schematic sectional view of one embodiment of the apparatus of the present invention; and I: if, , I
Figure 2 is a schematic overall view of an electrochem-teal cell installation having integrated therein an apparatus similar to that of Figure 1.
Referring now to the drawing in detail, as shown in Figure 1, the apparatus comprises a reactor 10, the housing 11 is owe cartridge type form. The ends of -the cylindrical interior of the reactor 10 are closed off by a bottom 12 and a top 13, which are connected to the wall of the housing via seals 14. An inlet connection 15 is provided in the bottom 12 for the supply of alga-line solution, and an outlet connection 16 is provided in the top - pa -~LZ2~18~
for the withdrawal of alkaline solution. In the lower portion of the interior of the housing there is located a precipitating agent 17 in the form of solid material of crushed calcium hydroxide from marble. The solid precipitating agent 17 is separated from the inlet by means of a liquid distributor 18. A
filter element 19 is placed above the precipitating agent 17 in the housing 11; the filter element 19 is held by means of retainers 20. Glass wool is preferred as a suitable filter material.
Figure 2 shows an installation for producing electrical energy, and comprises an electrochemical cell 21, a closed conduit system 22 for the electrolyte solution, a cooler 23, and a tank 24. Also provided is a reactor 25, the construction of which essentially corresponds to the apparatus of Figure 1. The reactor 25 is connected to the tank 24 by means of a conduit system 26 which is connected in parallel. The reactor 25 can, of course, also be connected in series (not illustrated) between the cooler 23 and the tank 24.
The electrochemical cell 21 preferably comprises a battery having an aluminum anode. Potassium hydroxide is preferred as the electrolyte solution.
The manner of operation of the present invention is illustrated by the following test performance.
For an Al/02 cell a 6.5 Mow KOCH solution is enriched at 80C with Allah until a concentration of about 3 Molehill is achieved. After the electron lyre solution is cooled to about 60C, 2 Molly g) Kiwi were added.
Thereafter, at certain intervals, the values shown in the following table were ascertained:
~Z~8~
Sample i V(mv) Pam I
1 0.0 - 59.68 142.5 2.64
2 0.1 - 67.68 133.5 2.47
3 0.5 - 69.55 127.5 2.36
4 1.0 - 70.23 126.5 2.34 2.0 - 70.00 125.5 2.32 6 4.0 - 70.90 125.5 2.32 7 5.0 - 70.60 125.0 2.31 8 96.0 - 70.60 125.0 2.31 After 96 hours had expired, no -further change in concentration occurred.
The present invention is, of course, in no way restricted to the specific disclosure of the specification and drawing, but also encompasses any modifications within the scope of the appended claims.
The present invention is, of course, in no way restricted to the specific disclosure of the specification and drawing, but also encompasses any modifications within the scope of the appended claims.
Claims (9)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method of reducing the aluminum content of an alkaline electrolyte solution of a battery having an aluminum anode, which comprises adding a precipitating agent selected from the group consisting of hydroxides of alkaline earth metals.
2. A method according to claim 1, which includes the step of utilizing said precipitating agent in solid form.
3. A method according to claim 1, which includes the step of utilizing said precipitating agent at an elevated temperature.
4. A method according to claim 1, which includes the step of utilizing calcium hydroxide as said precipitating agent.
5. An apparatus for reducing the aluminum content of alkaline solutions, said apparatus comprising a reactor, the reactor having a housing for containing a precipitating agent selected from the group consisting of hydroxides of alkaline earth metals, said reactor housing being provided with an inlet and an outlet for receipt of and withdrawal of such an alkaline solution.
6. An apparatus according to claim 5; wherein the precip-itating agent is in solid form.
7. An apparatus according to claim 5, in which said reactor further comprises a filter element within said housing, said filter element being disposed when viewed in a direction of flow of an alkaline solution through said reactor from said inlet to said outlet, downstream of a chamber which is arranged within said housing for retaining said precipitating agent.
8. An apparatus according to claim 5, 6 or 7 in which said precipitating agent is disposed within said housing and is calcium hydroxide.
9. An apparatus according to claim 5, 6 or 7 in which said housing of said reactor is in the form of a cartridge case, said inlet and outlet being essentially diametrically disposed in the longitudinal direction of said housing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3248153.5 | 1982-12-27 | ||
| DE3248153A DE3248153C2 (en) | 1982-12-27 | 1982-12-27 | Reducing the aluminum content of alkaline electrolyte solutions for batteries with aluminum anodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1226081A true CA1226081A (en) | 1987-08-25 |
Family
ID=6181861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000444212A Expired CA1226081A (en) | 1982-12-27 | 1983-12-23 | Method and apparatus for reducing the aluminum content of alkaline solutions |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0114969B1 (en) |
| JP (1) | JPS59132992A (en) |
| AT (1) | ATE21095T1 (en) |
| CA (1) | CA1226081A (en) |
| DE (1) | DE3248153C2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015151108A1 (en) * | 2014-04-03 | 2015-10-08 | Phinergy Ltd. | Method for regenerating alkaline solutions |
| US10720659B2 (en) | 2014-04-13 | 2020-07-21 | Phinergy Ltd | Systems and methods for regeneration of aqueous alkaline solution |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4994332A (en) * | 1989-07-11 | 1991-02-19 | Eltech Systems Corporation | Metal hydroxide crystallizer and filter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2738134C2 (en) * | 1977-08-24 | 1979-10-04 | Vereinigte Aluminium-Werke Ag, 5300 Bonn | Process for cleaning dilute sodium hydroxide solutions |
| FR2404600A1 (en) * | 1977-09-30 | 1979-04-27 | Pechiney Aluminium | Sodium hydroxide soln. purification - by lime addn. and concn. by evaporation esp. for treating Bayer process recycle soln. |
| US4287057A (en) * | 1980-09-02 | 1981-09-01 | Stanley Bedford F | Portable sink top water conditioner |
-
1982
- 1982-12-27 DE DE3248153A patent/DE3248153C2/en not_active Expired
-
1983
- 1983-11-25 AT AT83111804T patent/ATE21095T1/en not_active IP Right Cessation
- 1983-11-25 EP EP83111804A patent/EP0114969B1/en not_active Expired
- 1983-12-21 JP JP58240008A patent/JPS59132992A/en active Pending
- 1983-12-23 CA CA000444212A patent/CA1226081A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015151108A1 (en) * | 2014-04-03 | 2015-10-08 | Phinergy Ltd. | Method for regenerating alkaline solutions |
| CN106575807A (en) * | 2014-04-03 | 2017-04-19 | 斐源有限公司 | Method for regenerating alkaline solutions |
| CN106575807B (en) * | 2014-04-03 | 2020-05-29 | 斐源有限公司 | Method for regenerating alkaline solutions |
| US10720659B2 (en) | 2014-04-13 | 2020-07-21 | Phinergy Ltd | Systems and methods for regeneration of aqueous alkaline solution |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3248153A1 (en) | 1984-07-05 |
| JPS59132992A (en) | 1984-07-31 |
| DE3248153C2 (en) | 1986-10-09 |
| EP0114969B1 (en) | 1986-07-30 |
| ATE21095T1 (en) | 1986-08-15 |
| EP0114969A1 (en) | 1984-08-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3995204B1 (en) | Co2 capture process with electrolytic regeneration | |
| CA2989151C (en) | Water treatment system using alkaline water electrolysis device and alkaline fuel cell | |
| US3280014A (en) | Method of producing electricity and chemicals | |
| EP0190148A1 (en) | Electrochemical cell and method | |
| CN110380159B (en) | Aluminum-air battery and electrolyte recycling method thereof | |
| US4421662A (en) | Nonaqueous purification of mixed nitrate heat transfer media | |
| CA1226081A (en) | Method and apparatus for reducing the aluminum content of alkaline solutions | |
| CA2546499A1 (en) | Process for making nickel hydroxide | |
| CA1195650A (en) | Electrolyte and method for electrolytic production of alkaline peroxide solutions | |
| CN111850597B (en) | Electrochemical fluorination external circulation electrolysis system | |
| CN110204017A (en) | A kind of electrolytic treatment system and method adjusting ammonia-containing water pH value | |
| CN213078473U (en) | Gas-liquid synthesis reaction device for lithium hexafluorophosphate in anhydrous environment | |
| CN1165866A (en) | Pb cleaning and reclaiming method from waste storage battery | |
| US4076793A (en) | Method for sulfur dioxide control | |
| CN112047546A (en) | Treatment process for wastewater containing nitrate nitrogen through anodic oxidation | |
| CN216764349U (en) | Get rid of automation equipment of calcium ion in lithium hydroxide solution | |
| CN111540972A (en) | Method for removing fluoride ions in waste lithium ion batteries | |
| RU1798384C (en) | Method of nitrating mixture regeneration | |
| WO1988003965A1 (en) | Process for manufacturing hydrogen peroxide electrolytically | |
| EP0004847A1 (en) | Method for the electrochemical oxidation of hydrogen and carbonaceous fuels | |
| CN110921899A (en) | Lithium hexafluorophosphate and low-fluorine lithium phosphate compound wastewater treatment process and device | |
| CN220116389U (en) | Stator cooling water quality purification and regulation system | |
| CN118702147B (en) | A method for removing alkali from garnet-type solid electrolyte | |
| CN117080491B (en) | Purification method of electrolyte of flow battery | |
| CN220048099U (en) | Solid-state salification reaction device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |