US2806784A - Process for wet-refining non-ferrous metals and metal alloys - Google Patents
Process for wet-refining non-ferrous metals and metal alloys Download PDFInfo
- Publication number
- US2806784A US2806784A US326143A US32614352A US2806784A US 2806784 A US2806784 A US 2806784A US 326143 A US326143 A US 326143A US 32614352 A US32614352 A US 32614352A US 2806784 A US2806784 A US 2806784A
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- US
- United States
- Prior art keywords
- wet
- metal alloys
- bath
- nitric acid
- ferrous metals
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- 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
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/065—Nitric acids or salts thereof
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Definitions
- the object of my invention is a simplified wet-refining process making it possible to eliminate the lead impurity.
- My invention mainly consists in subjecting the nonerrous metal or alloy, previously changed into a divided product, to the action of a bath, at ambient temperature, made up of water and nitric acid, to which a surface active agent has been added.
- the object of my invention also relates to certain other arrangements as mentioned hereafter and preferably used jointly with the main process as indicated here above.
- My invention particularly covers certain methods for applying and carrying out the said arrangements, as also non-ferrous metals and non-ferrous metal alloys prepared through those processes which apply the said arrangements, the apparatuses and installations using the said arrangements and products, as well as articles and objects manufactured with the said metals or alloys.
- the non-ferrous metal or metal alloy is turned into a divided products. It is advantageous to start from lathe chips, grinding-machine chips or any other sorts of chips from machine-tools. Preferably, the smallest size of the product used should be of the order of 0.04 millimeter.
- the metal or metal alloy divided in this manner is dipped in a bath whose composition is as follows:
- the bath is maintained at ambient temperature.
- the amount of non-ferrous metal or metal alloy which can be treated in the above mentioned bath is 50 to 100 kilograms, for instance, in the case of bronze, brass or aluminum scraps.
- the tank containing the bath is made of cement or ceramic material, or lined inside with the latter materials.
- the bath is stirred through a mechanical stirring rod, or stirred by air, or other gas, in this instance, a neutral gas, forced into the bath liquid.
- the tank containing the bath is completely closed, and the bath liquid is poured into it or circulated in it, for instance, through a pump, the said liquid being maintained under pressure.
- the process as described permits to bring down the lead percentages in non-ferrous metals or metal alloys, from 25% to 0.50% and less.
- a process for eliminating lead impurities from nonferrous metallic materials selected from the group which consists of copper, aluminum and their alloys comprising the steps of comminuting the material to be purified and immersing the resulting metallic fragments, at ambient temperature, in a diluted aqueous solution of nitric acid having a liquid surfactant admixed with it, the amount of said surfactant being a small proportion of the amount of nitric acid in said solution.
- a process according to claim 2, wherein agitation of said bath is carried out by forcing through said bath a fluid selected from the group which consists of air and inert gases.
- a process for eliminating lead impurities from nonferrous metallic materials selected from the group which consists of copper, aluminum and their alloys comprising the steps of comminuting the material to be purified and immersing the resulting metallic fragments, at ambient temperature, in a diluted aqueous solution of nitric acid having a surface-active agent admixed with it, said agent being a liquid sodium alkyl sulphate present in an amount of the order of 5% of the amount of nitric acid in said solution.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
States PROCESS F011 WET-REFINING NQN-FERROUS idETALS AND METAL ALLOYS Tenn Raymond Vaiere Martiny, Rouen, France No Drawing. Application December 15, 1952, Serial No. 326,143
Claims priority, application France February 19, 1952 5 Claims. (Cl. 75-101) It is known that lead, as an impurity, plays a disastrous part in non-ferrous metals or non-ferrous metal alloys. When its percentage is above 0.5%, its presence namely brings about a decrease in the mechanical features of the subject metals and metal alloys.
It is also known that lead is unaffected by the dryrefining processes and that this operation has to be effected through the wet process, for instance, by subjecting the non-ferrous metal or alloy to be refined to the action of nitric acid in the presence of tartrates, this operation being efiected through the hot process.
The object of my invention is a simplified wet-refining process making it possible to eliminate the lead impurity. My invention mainly consists in subjecting the nonerrous metal or alloy, previously changed into a divided product, to the action of a bath, at ambient temperature, made up of water and nitric acid, to which a surface active agent has been added.
The object of my invention also relates to certain other arrangements as mentioned hereafter and preferably used jointly with the main process as indicated here above.
My invention particularly covers certain methods for applying and carrying out the said arrangements, as also non-ferrous metals and non-ferrous metal alloys prepared through those processes which apply the said arrangements, the apparatuses and installations using the said arrangements and products, as well as articles and objects manufactured with the said metals or alloys.
As an instance, I shall now disclose how my invention is to be carried out.
The non-ferrous metal or metal alloy is turned into a divided products. It is advantageous to start from lathe chips, grinding-machine chips or any other sorts of chips from machine-tools. Preferably, the smallest size of the product used should be of the order of 0.04 millimeter.
The metal or metal alloy divided in this manner is dipped in a bath whose composition is as follows:
100 litres water litres nitric acid, density 1.33 (36 Baum) 0.5 litre sodium alkyl sulphate.
The bath is maintained at ambient temperature.
The amount of non-ferrous metal or metal alloy which can be treated in the above mentioned bath is 50 to 100 kilograms, for instance, in the case of bronze, brass or aluminum scraps.
It will be an advantage if the tank containing the bath is made of cement or ceramic material, or lined inside with the latter materials.
In order to accelerate the refining process, one or more of the means given hereafter may be used.
The bath is stirred through a mechanical stirring rod, or stirred by air, or other gas, in this instance, a neutral gas, forced into the bath liquid.
The tank containing the bath is completely closed, and the bath liquid is poured into it or circulated in it, for instance, through a pump, the said liquid being maintained under pressure.
The process as described permits to bring down the lead percentages in non-ferrous metals or metal alloys, from 25% to 0.50% and less.
It results from the foregoing that by applying the processes as described, it is possible to obtain a particularly economical refining operation, namely to get topgrade metals or alloys from major amounts of metal which could be used only in very inferior manufactures, as also to immediately use scraps from the mechanical machining industry, in order to obtain the metals as described above.
It is obvious that my invention is not limited to the methods of application and utilization as stated; it also embodies all the variants thereof.
What I claim is:
1. A process for eliminating lead impurities from nonferrous metallic materials selected from the group which consists of copper, aluminum and their alloys, comprising the steps of comminuting the material to be purified and immersing the resulting metallic fragments, at ambient temperature, in a diluted aqueous solution of nitric acid having a liquid surfactant admixed with it, the amount of said surfactant being a small proportion of the amount of nitric acid in said solution.
2. A process according to claim 1, wherein said bath is agitated during immersion of said fragments therein.
3. A process according to claim 2, wherein agitation of said bath is carried out by forcing through said bath a fluid selected from the group which consists of air and inert gases.
4. A process according to claim 1, wherein said bath is maintained under pressure during immersion of said fragments therein.
5. A process for eliminating lead impurities from nonferrous metallic materials selected from the group which consists of copper, aluminum and their alloys, comprising the steps of comminuting the material to be purified and immersing the resulting metallic fragments, at ambient temperature, in a diluted aqueous solution of nitric acid having a surface-active agent admixed with it, said agent being a liquid sodium alkyl sulphate present in an amount of the order of 5% of the amount of nitric acid in said solution.
References Cited in the file of this patent UNITED STATES PATENTS 571,369 Hunt Nov. 17, 1896 1,785,245 Bowman Dec. 16, 1930 1,886,411 Mantell Nov. 8, 1932 1,918,817 Mantell July 18, 1933 1,954,743 Peterson Apr. 10, 1934 2,200,139 White May 7, 1940 2,465,750 Reid Mar. 29, 1949 2,509,003 Lathrop et a1 May 23, 1950 2,564,749 Bried Aug. 21, 1951 2,697,660 Sibert Dec. 21, 1954 FOREIGN PATENTS 458,163 Great Britain Dec. 14, 1936 OTHER REFERENCES Holmes, H. N.: General Chemistry, The Macmillan Co., New York, N. Y. (1949), 5th ed., page 545.
Claims (1)
1. A PROCESS FOR ELIMINATING LEAD IMPURITIES FROM NONFERROUS METALLIC MATERIALS SELECTED FROM THE GROUP WHICH CONSISTS OF COPPER, ALUMINUM AND THEIR ALLOYS, COMPRISING THE STEPS OF COMMINUTING THE MATERIAL TO BE PURIFIED AND IMMERSING THE RESULTING METALLIC FRAGMENTS, AT AMBIENT TEMPERATURE, IN A DILUTED AQUEOUS SOLUTION OF NITRIC ACID HAVING A LIQUID SURFACTANT ADMIXED WITH IT, THE AMOUNT OF SAID SURFACTANT BEING A SMALL PROPORTION OF THE AMOUNT OF NITRIC ACID IN SAID SOLUTION.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2806784X | 1952-02-19 |
Publications (1)
Publication Number | Publication Date |
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US2806784A true US2806784A (en) | 1957-09-17 |
Family
ID=9688941
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US326143A Expired - Lifetime US2806784A (en) | 1952-02-19 | 1952-12-15 | Process for wet-refining non-ferrous metals and metal alloys |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2970051A (en) * | 1959-05-01 | 1961-01-31 | Sherritt Gordon Mines Ltd | Process for the separation of lead from solutions |
US3117936A (en) * | 1960-09-19 | 1964-01-14 | Universal Oil Prod Co | Reactivating lead-contaminated catalysts |
US4223948A (en) * | 1977-12-27 | 1980-09-23 | Atlantic Richfield Company | Process for the reduction of competitive oxidant consuming reactions in the solution mining of a mineral |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US571369A (en) * | 1896-11-17 | Process of refining gold and silver bullion | ||
US1785245A (en) * | 1929-10-08 | 1930-12-16 | Republic Steel Corp | Removal of lead coatings from metallic articles |
US1886411A (en) * | 1929-03-29 | 1932-11-08 | Dudzeele Corp | Art of removing lead from ferrous articles |
US1918817A (en) * | 1928-12-12 | 1933-07-18 | Dudzeele Corp | Art of removing lead from tubes and other articles |
US1954743A (en) * | 1932-02-03 | 1934-04-10 | Delaney Chemical Company | Composition for treating metal |
GB458163A (en) * | 1934-06-23 | 1936-12-14 | Henkel & Cie Gmbh | Improvements in or relating to the cleansing of metal articles |
US2200139A (en) * | 1939-02-01 | 1940-05-07 | Clarence B White | Process for recovery of metals from alloys and metallurgical residues |
US2465750A (en) * | 1944-05-23 | 1949-03-29 | Reid Engineering Company | Composition for preparing aluminum and the like for welding |
US2509003A (en) * | 1942-01-08 | 1950-05-23 | Lathrop Paulson Co | Process for washing containers |
US2564749A (en) * | 1949-08-16 | 1951-08-21 | Hercules Powder Co Ltd | Stainless steel pickling bath solution |
US2697660A (en) * | 1951-04-25 | 1954-12-21 | Merle E Sibert | Purification of titanium by washing and froth flotation |
-
1952
- 1952-12-15 US US326143A patent/US2806784A/en not_active Expired - Lifetime
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US571369A (en) * | 1896-11-17 | Process of refining gold and silver bullion | ||
US1918817A (en) * | 1928-12-12 | 1933-07-18 | Dudzeele Corp | Art of removing lead from tubes and other articles |
US1886411A (en) * | 1929-03-29 | 1932-11-08 | Dudzeele Corp | Art of removing lead from ferrous articles |
US1785245A (en) * | 1929-10-08 | 1930-12-16 | Republic Steel Corp | Removal of lead coatings from metallic articles |
US1954743A (en) * | 1932-02-03 | 1934-04-10 | Delaney Chemical Company | Composition for treating metal |
GB458163A (en) * | 1934-06-23 | 1936-12-14 | Henkel & Cie Gmbh | Improvements in or relating to the cleansing of metal articles |
US2200139A (en) * | 1939-02-01 | 1940-05-07 | Clarence B White | Process for recovery of metals from alloys and metallurgical residues |
US2509003A (en) * | 1942-01-08 | 1950-05-23 | Lathrop Paulson Co | Process for washing containers |
US2465750A (en) * | 1944-05-23 | 1949-03-29 | Reid Engineering Company | Composition for preparing aluminum and the like for welding |
US2564749A (en) * | 1949-08-16 | 1951-08-21 | Hercules Powder Co Ltd | Stainless steel pickling bath solution |
US2697660A (en) * | 1951-04-25 | 1954-12-21 | Merle E Sibert | Purification of titanium by washing and froth flotation |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2970051A (en) * | 1959-05-01 | 1961-01-31 | Sherritt Gordon Mines Ltd | Process for the separation of lead from solutions |
US3117936A (en) * | 1960-09-19 | 1964-01-14 | Universal Oil Prod Co | Reactivating lead-contaminated catalysts |
US4223948A (en) * | 1977-12-27 | 1980-09-23 | Atlantic Richfield Company | Process for the reduction of competitive oxidant consuming reactions in the solution mining of a mineral |
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