US1773160A - Process for cupric-oxide removal - Google Patents
Process for cupric-oxide removal Download PDFInfo
- Publication number
- US1773160A US1773160A US229524A US22952427A US1773160A US 1773160 A US1773160 A US 1773160A US 229524 A US229524 A US 229524A US 22952427 A US22952427 A US 22952427A US 1773160 A US1773160 A US 1773160A
- Authority
- US
- United States
- Prior art keywords
- oxide
- cupric
- copper
- black
- oxide removal
- 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
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 title description 18
- 238000000034 method Methods 0.000 title description 13
- 229960004643 cupric oxide Drugs 0.000 title description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 10
- 239000010949 copper Substances 0.000 description 10
- 229910052802 copper Inorganic materials 0.000 description 9
- 239000003792 electrolyte Substances 0.000 description 7
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 description 3
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 description 3
- 229940112669 cuprous oxide Drugs 0.000 description 3
- 229910000431 copper oxide Inorganic materials 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
Definitions
- This invention relates to a process for the removal of cupric oxide (black) from the surfaces ofcrystalline cuprous oxide or from the surfaces of metallic copper.
- the removal of the black oxide can be accomplished by mechanical means for example by planing or cutting with abrasives such as emery cloth on cutting wheels but very often such methods are not desirable.
- abrasives such as emery cloth on cutting wheels
- the red oxide should not be damaged or broken in any way. Since the black oxide is harder than the red oxide any device that will remove the black oxide will readily remove the red oxide as well.
- Our invention as herein described and defined in the appended claimsets forth a process which we have found to be very" desirable and effective in removing black cupric oxide from copper or cuprous oxide surfaces. This process will not produce mechanical damage, such as cracks or abrasions, to the under surfaces and will remove any thickness of black oxide ordinarily produced in the treatment of copper.
- cupric (black) oxide as formed on copper surfaces or on top of red oxide surfaces is of fine crystalline structure and is quite porous to liquids or gases.
- the red cuprous crystalline oxide on the other hand is attacked comparatively slowly by either liquids or gases.
- the electrolyte required by our process may be dilute sulphuric acid or other strong acid which readily attacks copper oxides. Any variety or concentration of copper salts may be included in the electrolyte. he copper plate covered with oxide is used for an electrode in this electrolyte and a piece of pure copper or chemically inert conducting substance for the other electrode. If direct current is passed through the solution in either direction reduction of the surface oxide occurs. If the oxide coated copper is made the cathode a deposit of metallic spongy cop er is formed replacing the reduced oxid d on the surface. Copper so Application filed October 28, 1927. Serial No. 229,524.
- the loosened oxide can be washed 03 leaving the under surface clean. Further action by the acid, after the cleaned surface is removed from the solution, is prevented by immediate neutralization with an alkaline substance, for example, dipping the cleaned surface in a dilute solution of ammonium h droxide.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Electrolytic Production Of Metals (AREA)
Description
Patented Aug. 19, 1930 UNITED STATES PATENT OFFICE WILLIAM THEODORE ANDERSON, JR., AND LESTER FLETCHER EIRD, OF NEWARK.
' NEW JERSEY, ASSIGNORS T0 HANOVIA CHEMICAL AND MANUFACTURING CO]!- IPANY, OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY PROCESS FOR CUPRIC-OXIDE REMOVAL No Drawing.
This invention relates to a process for the removal of cupric oxide (black) from the surfaces ofcrystalline cuprous oxide or from the surfaces of metallic copper.
The removal of the black oxide can be accomplished by mechanical means for example by planing or cutting with abrasives such as emery cloth on cutting wheels but very often such methods are not desirable. In those cases where it is necessary to remove black oxide from the surface of red oxide it is very important that the red oxide should not be damaged or broken in any way. Since the black oxide is harder than the red oxide any device that will remove the black oxide will readily remove the red oxide as well. Our invention as herein described and defined in the appended claimsets forth a process which we have found to be very" desirable and effective in removing black cupric oxide from copper or cuprous oxide surfaces. This process will not produce mechanical damage, such as cracks or abrasions, to the under surfaces and will remove any thickness of black oxide ordinarily produced in the treatment of copper.
The cupric (black) oxide as formed on copper surfaces or on top of red oxide surfaces is of fine crystalline structure and is quite porous to liquids or gases. The red cuprous crystalline oxide on the other hand is attacked comparatively slowly by either liquids or gases. These characteristics are favorable to electrolytic methods of separation.
The electrolyte required by our process may be dilute sulphuric acid or other strong acid which readily attacks copper oxides. Any variety or concentration of copper salts may be included in the electrolyte. he copper plate covered with oxide is used for an electrode in this electrolyte and a piece of pure copper or chemically inert conducting substance for the other electrode. If direct current is passed through the solution in either direction reduction of the surface oxide occurs. If the oxide coated copper is made the cathode a deposit of metallic spongy cop er is formed replacing the reduced oxid d on the surface. Copper so Application filed October 28, 1927. Serial No. 229,524.
formed can be removed by reversing the direction of current flow. Alternating current is the more desirable electrical supply since by its use the oxide is loosened without any deposition of metallic copper. After several seconds of treatment the loosened oxide can be washed 03 leaving the under surface clean. Further action by the acid, after the cleaned surface is removed from the solution, is prevented by immediate neutralization with an alkaline substance, for example, dipping the cleaned surface in a dilute solution of ammonium h droxide.
The advantageso this process are many. First, a satisfactory simple cleaning method removes the need for special precautions to prevent the formation of the black oxide on the surfaces. Second, all parts of the process are simple requiring no special or elaborate equipment. Third, only the black oxide is attacked readily by this procedure, since the red crystalline oxide is only acted upon at a greatly reduced rate. Fourth, the black 0x1 ide is completely loosened from the surface so that it can be washed off entirely with a minimum of labor. Fifth, the concentration of electric current is not important and may vary- Widely. Sixth, the kind or type of electrolyte is not critical and many kinds and concentrations are suitable.
Having described our invention, what we claim as new and desire to secure by Letters Patent, is The herein described process of removing cupric oxide from a metallic copper and crystalline cuprous oxide surface, which consists lacing the object carrying the cupric oxi e into an electrolyte, said electrolyte being a strong acid which readily attacks copper oxide, passing an alternating electric current through the electrolyte to the cupric oxide as an electrode to thereby loosen the cupric oxide, washing off the loosened cupric oxide from the object, and then immersing the object in an alkaline substance to prevent further action of the acid.
This specification signed and witnessed this twenty-fifth day of October, 1927.
WILLIAM THEODORE ANDERSON, Jr.
LESTER FLETCHER BIRD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US229524A US1773160A (en) | 1927-10-28 | 1927-10-28 | Process for cupric-oxide removal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US229524A US1773160A (en) | 1927-10-28 | 1927-10-28 | Process for cupric-oxide removal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1773160A true US1773160A (en) | 1930-08-19 |
Family
ID=22861613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US229524A Expired - Lifetime US1773160A (en) | 1927-10-28 | 1927-10-28 | Process for cupric-oxide removal |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1773160A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2687373A (en) * | 1947-08-22 | 1954-08-24 | Cris Trust | Process for the production of a metal offset printing plate |
| US2725353A (en) * | 1950-07-21 | 1955-11-29 | Western Electric Co | Electropolishing metallic articles |
| WO2004011699A1 (en) * | 2002-07-31 | 2004-02-05 | Outokumpu Oyj | Removing surface oxides from copper |
-
1927
- 1927-10-28 US US229524A patent/US1773160A/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2687373A (en) * | 1947-08-22 | 1954-08-24 | Cris Trust | Process for the production of a metal offset printing plate |
| US2725353A (en) * | 1950-07-21 | 1955-11-29 | Western Electric Co | Electropolishing metallic articles |
| WO2004011699A1 (en) * | 2002-07-31 | 2004-02-05 | Outokumpu Oyj | Removing surface oxides from copper |
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