US2405302A - Composition for and method of purifying electrolytes - Google Patents
Composition for and method of purifying electrolytes Download PDFInfo
- Publication number
- US2405302A US2405302A US500164A US50016443A US2405302A US 2405302 A US2405302 A US 2405302A US 500164 A US500164 A US 500164A US 50016443 A US50016443 A US 50016443A US 2405302 A US2405302 A US 2405302A
- Authority
- US
- United States
- Prior art keywords
- copper
- zinc
- antimony
- electrolyte
- purifying
- 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 - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S29/00—Metal working
- Y10S29/022—Method or apparatus using indium
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12181—Composite powder [e.g., coated, etc.]
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12778—Alternative base metals from diverse categories
Definitions
- the impurities cadmium, copper, tin, arsenic, antimony, lead, and other elemerits if left in theelectrolyte, will deposit along with the zinc in the electrolytic cell and will render the zinc impure so that its value is decreased; other impurities, among which may be mentioned arsenic, antimony, tin, germanium, tellurium, selenium, iron, nickel and cobalt, lower the elliciency of the electrolysis so that more current is used to produce a pound of metal than would be required if these elements were absent, and so their presence greatly increase the expense of the process. Commonly, two and sometimes three processes are used to remove these impurities.
- the iron together with part of the copper, arsenic, antimony, tin, germanium, tellurium, selenium, and other metals, is precipitated by treating the electrolyte with zinc oxide, or roasted zinc ore, or lime, while air is blown through the solution.
- the resulting precipitate is removed by thickeners or filters.
- the solution is then treated with zinc dust, sometimes along with other reagents such as copper-salts, and thereby antimony, arsenic, tellurium, selenium, tin, cobalt, copper, cadmium, and other elements are precipitated and may be removed by filtration.
- a third method is used to remove certain elements, as, for example, sometimes a nitroso-B-naphthol is used to remove cobalt.
- the purifying action of zinc dust is increased if finely divided copper be present; commonly this finely divided copper is formed by precipitating it from the solution to be purified by the zinc dust. Further, the purifying action of the zinc is still further increased if antimony or arsenic be deposited 2 upon it: when zinc dust, together with copper and antimony, is used, the purifying action becomes great enough to precipitate certain metals, of which cobalt is an example, which are very difficult to precipitate otherwise.
- indium may be used instead of antimony or arsenic with improved eifects.
- a method of purifying zine electrolytes by means of metallic precipitants comprising passing the electrolyte through a stationary porous mass of finely divided precipitant for the electrolyte comprising zinc dust coated with copper and indium, and maintaining the precipitated impurities in contact with the precipitants while con tinuing to pass the electrolyte through said mass.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
HLE' hnhitilt COMPOSITION Fon AND METHOD OF 7 PURIFYING ELECTROLYTES Dinsmore Laurence Grifi'ith and Luther I Glenn Hendrickson, Flin Flon, Manitoba, Canada, as-
signors to Hudson Bay Mining and smelting Company, Limited, Winnipeg, Manitoba, Canada, a corporation of Canada No Drawing. Application August 26, 1943,
Serial No. 500,164
3 Claims.
materials.
That certain impurities in electrolytes cause great difficulty during the operation of plating by electrical methods, in some cases due to the impurity itself plating and so causing the deposit to be impure and of less value, and in other cases due to theimpurity bringing about a lowered efficiency in the plating process, is a fact well known in the arts. Consequently, great pains are taken and much expense is incurred in purifying electrolytes so that the harmful impurities may be removed to a suflicient extent.
In the electrolytic process for the winning of zinc, for example, the impurities cadmium, copper, tin, arsenic, antimony, lead, and other elemerits, if left in theelectrolyte, will deposit along with the zinc in the electrolytic cell and will render the zinc impure so that its value is decreased; other impurities, among which may be mentioned arsenic, antimony, tin, germanium, tellurium, selenium, iron, nickel and cobalt, lower the elliciency of the electrolysis so that more current is used to produce a pound of metal than would be required if these elements were absent, and so their presence greatly increase the expense of the process. Commonly, two and sometimes three processes are used to remove these impurities. The iron, together with part of the copper, arsenic, antimony, tin, germanium, tellurium, selenium, and other metals, is precipitated by treating the electrolyte with zinc oxide, or roasted zinc ore, or lime, while air is blown through the solution. The resulting precipitate is removed by thickeners or filters. The solution is then treated with zinc dust, sometimes along with other reagents such as copper-salts, and thereby antimony, arsenic, tellurium, selenium, tin, cobalt, copper, cadmium, and other elements are precipitated and may be removed by filtration. Sometimes a third method is used to remove certain elements, as, for example, sometimes a nitroso-B-naphthol is used to remove cobalt.
Now, in the removal of impurities by means of zinc dust, it is well known in the art that the purifying action of zinc dust is increased if finely divided copper be present; commonly this finely divided copper is formed by precipitating it from the solution to be purified by the zinc dust. Further, the purifying action of the zinc is still further increased if antimony or arsenic be deposited 2 upon it: when zinc dust, together with copper and antimony, is used, the purifying action becomes great enough to precipitate certain metals, of which cobalt is an example, which are very difficult to precipitate otherwise.
We have discovered that indium may be used instead of antimony or arsenic with improved eifects.
As an example of the use of our invention, we
took a sample of zinc electrolyte which showed the following analysis as to impurities:
Milligrams per liter Cobalt 8.4 Arsenic 0.20 Antimony 0.14
We dissolved 0.142 gram metallic indium in sulphuric acid and neutralized the resulting solution with sodium hydroxide. In this solution were dissolved 8 grams of copper sulphate I (CuSO4.5H2O) This solution was diluted to 300 cc. with water. Two hundred grams of -20+48 mesh zinc dust were added and the whole agitated until the copper and indium were precipitated on the zinc dust. The zinc dust coated with copper and indium was then packed in a l-inch copper tube about 12 inches long and held in place with glass wool. Arrangements were made so that the electrolyte could be drawn through this copper tube. The electrolyte was heated to 50 C. and drawn through; the contact time of the electrolyte with the mixture is estimated to have been 1.13 minutes. The issuing solution had the following analysis:
Milligrams per liter Cobalt 3.4 Arsenic--- 0.01 Antimony 0.05
That the indium plays an essential role in the purification was proved by carrying out the same experiment, using zinc dust and copper only, and
It will be observed that in the precipitants above described, including zinc coated with copper and indium, the precipitant in a finely divided search some tacting the electrolyte with zinc dust coated with 10 copper and indium as the precipitant.
3. A method of purifying zine electrolytes by means of metallic precipitants comprising passing the electrolyte through a stationary porous mass of finely divided precipitant for the electrolyte comprising zinc dust coated with copper and indium, and maintaining the precipitated impurities in contact with the precipitants while con tinuing to pass the electrolyte through said mass.
DINSMORE LAURENCE GRIFFITH. LUTHER. GLENN HENDRICKSON.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US500164A US2405302A (en) | 1943-08-26 | 1943-08-26 | Composition for and method of purifying electrolytes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US500164A US2405302A (en) | 1943-08-26 | 1943-08-26 | Composition for and method of purifying electrolytes |
Publications (1)
Publication Number | Publication Date |
---|---|
US2405302A true US2405302A (en) | 1946-08-06 |
Family
ID=23988312
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US500164A Expired - Lifetime US2405302A (en) | 1943-08-26 | 1943-08-26 | Composition for and method of purifying electrolytes |
Country Status (1)
Country | Link |
---|---|
US (1) | US2405302A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2759845A (en) * | 1954-10-25 | 1956-08-21 | Metropolitan Mirror And Glass | Processes of precipitating copper from copper sulfate solutions and precipitating media for so doing |
US4096064A (en) * | 1976-04-05 | 1978-06-20 | Ameron, Inc. | System for removal of toxic heavy metals from drinking water |
US4124462A (en) * | 1976-01-26 | 1978-11-07 | Mx-Processer Reinhardt & Co. Ab | Recovering zinc from a material containing zinc and iron |
-
1943
- 1943-08-26 US US500164A patent/US2405302A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2759845A (en) * | 1954-10-25 | 1956-08-21 | Metropolitan Mirror And Glass | Processes of precipitating copper from copper sulfate solutions and precipitating media for so doing |
US4124462A (en) * | 1976-01-26 | 1978-11-07 | Mx-Processer Reinhardt & Co. Ab | Recovering zinc from a material containing zinc and iron |
US4096064A (en) * | 1976-04-05 | 1978-06-20 | Ameron, Inc. | System for removal of toxic heavy metals from drinking water |
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