US492221A - Carl moldenhatter - Google Patents
Carl moldenhatter Download PDFInfo
- Publication number
- US492221A US492221A US492221DA US492221A US 492221 A US492221 A US 492221A US 492221D A US492221D A US 492221DA US 492221 A US492221 A US 492221A
- Authority
- US
- United States
- Prior art keywords
- carl
- gold
- potassium
- cyanide
- moldenhatter
- 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 18
- 239000010931 gold Substances 0.000 description 18
- 229910052737 gold Inorganic materials 0.000 description 18
- YAGKRVSRTSUGEY-UHFFFAOYSA-N Ferricyanide Chemical compound [Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] YAGKRVSRTSUGEY-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- NNFCIKHAZHQZJG-UHFFFAOYSA-N Potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 description 8
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 8
- 229910052700 potassium Inorganic materials 0.000 description 8
- 239000011591 potassium Substances 0.000 description 8
- 239000003513 alkali Substances 0.000 description 6
- XFXPMWWXUTWYJX-UHFFFAOYSA-N cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- JMANVNJQNLATNU-UHFFFAOYSA-N Cyanogen Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium(0) Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- -1 gold cyanide compound Chemical class 0.000 description 2
- 230000001590 oxidative Effects 0.000 description 2
- 150000003385 sodium Chemical class 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium 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 an alkali or alkaline earth and has for its object to render the process more expeditious and considerably cheaper.
- ferricyanide of potassium or another ferricyanogen salt of an alkali or of an earth alkali in an alkaline solution By this means the oxidation being rendered very much more energetic is effected with a considerably smaller quantity of the solvent.
- ferricyanide of potassium or other ferricyanides to the cyanide of potassium solution, as much as eighty per cent. of potassium cyanide may be saved.
- the 'ferricyanide of potassium alone will not dissolve the gold and does not therefore come under the category of a solvent hitherto employed in processes of extraction It does not therefore render unnecessary the employment of the simple cyanide as a solvent but only reduces the amount required owing to the capacity of the ferricyanide to assist the air to rapidly oxidize the gold in the presence of the simple salt. Consequently the cyanogen of the latter is not used to form the gold cyanide compound.
Description
UNITED STATES PATENT GEEICE.
CARL MOLDENHAUER, OF FRANKFORT-ON-THE-MAIN, GERMANY.
EXTRACTING GOLD FROM ITS ORES.
SPECIFICATION forming part of Letters Patent No. 492,221, dated February 21, 1893.
Original application filed February 20, 1992, Serial No. 422,294. Divided andthis application filed September '7, 1892- Serial No- 445,251. (No specimens.) Patented in Italy February 2'7, 1892, XVI, 31,214, and LXI 250.
To ctZZ whom it may concern:
Be it known that I, CARL IVIOLDENHAUER, a subject of the Emperor of Germany, and a resident of Frankfort-on-the-Main, Germany, have invented new and useful Improvements in Processes of Extracting Gold from its Ores, (for which I have obtained Italian Letters Patent Nos. XVI, 31,214, and LXI, 250, dated February 27, 1892,) 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 an alkali or alkaline earth 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,sodium, barium, &c. the simultaneous oxidation of the gold is necessary and this has hitherto been effected by the action of the air upon the gold which is rendered oxidizable thereby by the action of the cyanide solution.
Instead of depending solely upon the agency of the air for the oxidizing action I employ, to assist the oxidation of the gold, ferricyanide of potassium or another ferricyanogen salt of an alkali or of an earth alkali in an alkaline solution. By this means the oxidation being rendered very much more energetic is effected with a considerably smaller quantity of the solvent. Thus by the addition of ferricyanide of potassium or other ferricyanides to the cyanide of potassium solution, as much as eighty per cent. of potassium cyanide may be saved.
It may be remarked that the 'ferricyanide of potassium alone will not dissolve the gold and does not therefore come under the category of a solvent hitherto employed in processes of extraction It does not therefore render unnecessary the employment of the simple cyanide as a solvent but only reduces the amount required owing to the capacity of the ferricyanide to assist the air to rapidly oxidize the gold in the presence of the simple salt. Consequently the cyanogen of the latter is not used to form the gold cyanide compound.
What I claim as my invention, and desire to secure by Letters Patent, is
The process of extracting gold from its ores consisting in subjecting the ores to the dissolving action of cyanide of potassium in the presence of ferricyanide 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 MOLDENI-IAIIER.
Witnesses:
FRANZ HASSLACHER, ALvEs'ro S. I-IoGUE.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US492221A true US492221A (en) | 1893-02-21 |
Family
ID=2561065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US492221D Expired - Lifetime US492221A (en) | Carl moldenhatter |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US492221A (en) |
-
0
- US US492221D patent/US492221A/en not_active Expired - Lifetime
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