US791555A - Process of stripping tin. - Google Patents
Process of stripping tin. Download PDFInfo
- Publication number
- US791555A US791555A US12931502A US1902129315A US791555A US 791555 A US791555 A US 791555A US 12931502 A US12931502 A US 12931502A US 1902129315 A US1902129315 A US 1902129315A US 791555 A US791555 A US 791555A
- Authority
- US
- United States
- Prior art keywords
- tin
- iron
- stripping
- stripping tin
- liquor
- 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
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 title description 10
- 238000000034 method Methods 0.000 title description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 9
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 3
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229940072033 potash Drugs 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 235000015320 potassium carbonate Nutrition 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Images
Classifications
-
- 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
- C22B25/00—Obtaining tin
Definitions
- thesubject of my present invention I still employ a solution of persulfate of iron as an agent for stripping the tin; but I make the solution slightly acid and treat it electrolytically, the tin being deposited in a metallic state upon any suitable cathode.
- the tinned iron clippings or like scrap are immersed in a bath of persulfate of iron contained in the tank A, said bath being suitably acidified by the addition of any mineral acid; but sulfuric acid is preferred.
- a valve a in the pipe a is opened and the liquor run into the vessel B, where it is treated electrolytically, the electrodes 0 consisting, preferably, of an iron anode and a copper or tinned copper cathode.
- the electrolyte is passed by way of the pipe 6, controlled by the valve 7), to the vessel D, where nitrate of soda, (or of. p0tash,) either alone or in conjunction with sulfuric acid, is added.
- nitrate of soda, (or of. p0tash,) either alone or in conjunction with sulfuric acid, is added.
- the efficacy of the liquor is hereby restored and the liquor rendered suitable for reuse instrip ping a further quantity of tinned iron.
- vessel D is provided with a jacket M for heating the liquor and with an outlet F for carrying ofi the nitrous fumes.
- the electrolyte having been sufiiciently oxidized, the valve d in the pipe d is opened and the liquor allowed to run into the tank L, whence it is returned by the pump N or by equivalent means to the tank A.
- the tin-scrap may be added direct to a solution of nitrate of soda (or of potash) mixed with sulfuric acid, the tin going into solution for ultimate recovery by electrolytic or other means.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Description
No. 791.555. PATENTED JUNE6-,1905.
I H. W. HEMINGWAY.
PROCESS OF STRIPPING TIN.
APPLICATION FILED OCT. 29, 1902.
WIT/VIJSES. awn/70k:
v ii-0 1m UNITED STATES Patented June 6, 1905.
PATENT OFFICE.
PROCESS, OF STRIPPING TIN.
SPECIFICATION forming part of Letters Patent No. 791,555, dated une 6, 1905.
Application filed October 29, 1902. Serial No. 129,315.
To all whom it may concern:
Be it known that I, HENRY WILLIAM HEM- INGWAY, a subject of the King of Great Britain and Ireland, residing at Albyns, Forest Road, Walthamstow, Essex, England, have in-- vented a certain new and useful Improved Process of Stripping Tin from Tinned Iron, Recovering the Respective Metals, and Obtaining Nitric Acid as a By-Product, of which the following is a specification.
In the specification to my Letters Patent dated December 4, 1900, No. 663,024, is described a process in which tinned iron istreated with a solution of persulfate of iron, the tin being precipitated as a sulfid,whence the metal is recovered. r
According to my improved process, thesubject of my present invention, I still employ a solution of persulfate of iron as an agent for stripping the tin; but I make the solution slightly acid and treat it electrolytically, the tin being deposited in a metallic state upon any suitable cathode. When the electrolyte becomes inactive, I treat it with nitrate of soda (or of potash) in conjunction with sulfuric or hydrochloric acid with a view to its revivification.
The accompanying drawing represents apparatus adapted for use in carrying out my' improved process. I
The tinned iron clippings or like scrap are immersed in a bath of persulfate of iron contained in the tank A, said bath being suitably acidified by the addition of any mineral acid; but sulfuric acid is preferred. The tin having become dissolved, a valve a in the pipe a is opened and the liquor run into the vessel B, where it is treated electrolytically, the electrodes 0 consisting, preferably, of an iron anode and a copper or tinned copper cathode. The tin or the greater portion thereof having been deposited upon the cathode, the electrolyte is passed by way of the pipe 6, controlled by the valve 7), to the vessel D, where nitrate of soda, (or of. p0tash,) either alone or in conjunction with sulfuric acid, is added. The efficacy of the liquor is hereby restored and the liquor rendered suitable for reuse instrip ping a further quantity of tinned iron. For
the mixture of nitrate and sulfuric acid other oxidizing agents may be substituted. The
vessel D is provided with a jacket M for heating the liquor and with an outlet F for carrying ofi the nitrous fumes. The electrolyte having been sufiiciently oxidized, the valve d in the pipe d is opened and the liquor allowed to run into the tank L, whence it is returned by the pump N or by equivalent means to the tank A.
When it is deemed desirable to reduce to a minimum the quantity of persulfate of iron employed, the tin-scrap may be added direct to a solution of nitrate of soda (or of potash) mixed with sulfuric acid, the tin going into solution for ultimate recovery by electrolytic or other means.
What I claim as my invention, anddesire to secure by Letters Patent, is
The herein-described process for stripping HENRY WILLIAM HEMINGWAY.
Witnesses: WM. 0. BROWN,- FRED 0. SMITH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12931502A US791555A (en) | 1902-10-29 | 1902-10-29 | Process of stripping tin. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12931502A US791555A (en) | 1902-10-29 | 1902-10-29 | Process of stripping tin. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US791555A true US791555A (en) | 1905-06-06 |
Family
ID=2860044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US12931502A Expired - Lifetime US791555A (en) | 1902-10-29 | 1902-10-29 | Process of stripping tin. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US791555A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4181580A (en) * | 1973-11-28 | 1980-01-01 | Nippon Steel Corporation | Process for electro-tin plating |
-
1902
- 1902-10-29 US US12931502A patent/US791555A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4181580A (en) * | 1973-11-28 | 1980-01-01 | Nippon Steel Corporation | Process for electro-tin plating |
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