US483766A - Carl moldenhauer - Google Patents
Carl moldenhauer Download PDFInfo
- Publication number
- US483766A US483766A US483766DA US483766A US 483766 A US483766 A US 483766A US 483766D A US483766D A US 483766DA US 483766 A US483766 A US 483766A
- Authority
- US
- United States
- Prior art keywords
- moldenhauer
- carl
- ores
- cyanide
- gold
- 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
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 14
- 239000010931 gold Substances 0.000 description 14
- 229910052737 gold Inorganic materials 0.000 description 14
- NNFCIKHAZHQZJG-UHFFFAOYSA-N Potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 229960003975 Potassium Drugs 0.000 description 4
- XFXPMWWXUTWYJX-UHFFFAOYSA-N cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 4
- NPDODHDPVPPRDJ-UHFFFAOYSA-N permanganate Chemical compound [O-][Mn](=O)(=O)=O NPDODHDPVPPRDJ-UHFFFAOYSA-N 0.000 description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 4
- 229910052700 potassium Inorganic materials 0.000 description 4
- 235000007686 potassium Nutrition 0.000 description 4
- 239000011591 potassium Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001590 oxidative Effects 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
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
- C22B11/00—Obtaining noble metals
- C22B11/08—Obtaining noble metals by cyaniding
Definitions
- This invention relates to the process of extracting gold from its ores by means of a solution of cyanide of potassium, and has for its object to render the process more expeditious and considerably cheaper.
- the process is preferably carried out in a ball-mill lined with porcelain, wood, or other substance unattackable by the chemicals employed.
Description
UNITED STATES PATENT OFFICE.
CARL MOLDENHAUER, OF FRANKFORT-ON-TI-IE-MAIN, GERMANY.
PROCESS OF EXTRACTING GOLD FROM ITS ORES.
SPECIFICATION forming part of Letters Patent No. 483,766, dated October 4, 1892.
Application filed February 20, 1892. Serial No. 422,294. (No specimens.)
To all whom it may concern.-
Be it known that I, CARL MOLDENHAUER, a subject of the Emperor of Germany, and a resident of Frankfort-on-the-lliain, Germany,
have invented new and useful Improvements in the Process of Obtaining Precious Metals from Ores, of which the following is a specification.
This invention relates to the process of extracting gold from its ores by means of a solution of cyanide of potassium, and has for its object to render the process more expeditious and considerably cheaper.
In extracting gold from its ores by means of a solution of cyanide of potassium the simultaneous oxidation of the gold is necessary, and this has hitherto been efiected by the action of the air upon the gold, which is rendered oxidizable thereby by the action of the cyanide solution. Instead of depending upon the agency of the air for the oxidizing action I oxidize the gold by the addition to the said cyanide solution of permanganate of potas sium, which is an oxidizing agent not essentially affected by the cyanide of potassium.
The process is preferably carried out in a ball-mill lined with porcelain, wood, or other substance unattackable by the chemicals employed.
I do not claim, broadly, as my invention the dissolution of gold from its ores by means of cyanide of potassium; but
hat I claim as my invention, and desire to secure by Letters Patent, is-
The process herein described of extracting gold from its ores, consisting in subjecting the ores to the dissolving action of cyanide of potassium in the presence of permanganate of potassium, substantially as herein described.
In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.
CARL MOLDENHAUER.
\Vi tnesses:
FRANZ HAPLACHER, FRIEDRICH OoREELL.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US483766A true US483766A (en) | 1892-10-04 |
Family
ID=2552616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US483766D Expired - Lifetime US483766A (en) | Carl moldenhauer |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US483766A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4421724A (en) * | 1981-09-08 | 1983-12-20 | Anglo Mineral Resources, Inc. | Extraction method for refractory precious metal ore |
-
0
- US US483766D patent/US483766A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4421724A (en) * | 1981-09-08 | 1983-12-20 | Anglo Mineral Resources, Inc. | Extraction method for refractory precious metal ore |
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