DE338128C - Process for the extraction of precious metals from very dilute solutions of the same, in particular from sea water, brines and aqueous solutions of the potash works - Google Patents
Process for the extraction of precious metals from very dilute solutions of the same, in particular from sea water, brines and aqueous solutions of the potash worksInfo
- Publication number
- DE338128C DE338128C DE1919338128D DE338128DD DE338128C DE 338128 C DE338128 C DE 338128C DE 1919338128 D DE1919338128 D DE 1919338128D DE 338128D D DE338128D D DE 338128DD DE 338128 C DE338128 C DE 338128C
- Authority
- DE
- Germany
- Prior art keywords
- solutions
- cyanide
- precious metals
- extraction
- brines
- 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
Links
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
-
- 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
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
- C22B3/24—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition by adsorption on solid substances, e.g. by extraction with solid resins
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G7/00—Compounds of gold
- C01G7/003—Preparation involving a liquid-liquid extraction, an adsorption or an ion-exchange
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
Verfahren zur Gewinnung von Edelmetallen aus sehr verdünnten Lösungen derselben, insbesondere aus. 1Vfeerwasser, Solen und wässerigen Lösungen der Kaliwerke. Es ist früher bereits vorgeschlagen worden, zur Gewinnung von Edelmetallen aus sehr verdünnten Lösungen, insbesondere aus mechanisch geklärtem Meerwasser, das Edelmetall direkt oder unter Mitwirkung eines die Fällung bzw. Ausflockung fördernden Hilfsstoffes auszufällen und die abgeschiedenen edelmetallhaltigen Massen durch Filtration zu sammeln. Dazu sind besondere Filter nötig, welche in Anbetracht der bedeutenden Mengen des zu bewältigenden Filtrats und infolge der sich häufig nötig machenden Entleerung und Neuansetzung sich bald abnutzen werden. Die Hilfsstoffe und die erforderliche -Vermischung derselben mit der gesamten Wassermenge verteuern das Verfahren, ganz abgesehen davon, daß durch die Hilfsstoffe die weitere zur Reindarstellung des Edelmetalls führende Behandlung erschwert bzw.ebenfalls verteuert werden kann.Process for the extraction of precious metals from very dilute solutions same, in particular from. 1Vfeer water, brines and aqueous solutions from the potash works. It has previously been suggested for the extraction of precious metals from very high dilute solutions, especially from mechanically clarified seawater, the precious metal directly or with the help of an auxiliary substance that promotes precipitation or flocculation to precipitate and the deposited precious metal-containing masses by filtration collect. This requires special filters, which are important in view of the Quantities of the filtrate to be dealt with and as a result of the often necessary Drainage and replenishment will soon wear off. The auxiliary materials and the required -Mixing the same with the total amount of water make the process more expensive apart from the fact that the auxiliary substances are used to purify the noble metal leading treatment can be made more difficult or even more expensive.
Ferner ist bekannt, zur Abscheidung von Edelmetallen aus Meerwasser Adsorbentien, z. B. Kohle, Kiesabbrand, Fasern usw., also Stoffe mit großer Oberflächenentwicklung zu benutzen. Nach Patent 27a654, Klasse 4oa, Gruppe 22, wird nach vollzogener Adsorption die Kohle verbrannt und aus der Asche oder Schlacke das Edelmetall in bekannter Weise dargestellt.It is also known to separate precious metals from seawater Adsorbents, e.g. B. coal, gravel burn, fibers, etc., so substances with large surface development to use. According to patent 27a654, class 4oa, group 22, after adsorption has been completed the coal burned and from the ashes or slag the precious metal in well-known Way presented.
Dieses Adsorptionsverfahren macht nun zwar besondere Filter überflüssig, ist aber aus dem Grunde noch unwirtschaftlich, weil die zur Aufsammlung der Edelmetalle dienenden Stoffe nur einmal Verwendung finden können und andauernd Neubeschickungen der Adsorptionsanlage nötig werden. Fasern und Fasernabfallstoffe, welche sehr gut wirkende Adsorbentien für Edelmetalle sind, würden dann aber, d. h., wenn nur einmalige - Verwendung derselben möglich wäre, schon ihres höheren Preises wegen und da ihr Heizwert sogar geringer als der der Kohle ist, kaum in Betracht kommen können.This adsorption process makes special filters superfluous, but is still uneconomical for the reason that it is used to collect the precious metals Serving substances can only be used once and constantly being refilled the adsorption system become necessary. Fibers and fiber waste materials which are very good are effective adsorbents for precious metals, but would then, d. i.e. if only one-time - Use of the same would be possible, if only because of their higher price and because of them The calorific value is even lower than that of coal.
Diese Nachteile sollen durch die vorliegende Erfindung beseitigt werden, welche darauf begründet ist, daß die mit den Edelmetallen beladenen Adsorbentien die niedergerissenen Edelmetalle an verhältnismäßig geringe Mengen verdünnter wäßriger Lösungen von Alkalizyanid oder Zyangas oder an Mischlösungen derselben mit Bromzyan wieder abgeben, und da sie von den Zyanidlösungen selbst gar nicht angegriffen werden,- darum auch immer wieder von neuem zur Adsorption tauglich werden.These disadvantages are to be eliminated by the present invention, which is based on the fact that the adsorbents loaded with the noble metals the torn down precious metals to relatively small amounts of dilute aqueous Solutions of alkali cyanide or cyan gas or mixed solutions of the same with cyanogen bromide give up again, and since they are not attacked by the cyanide solutions themselves at all, therefore also be suitable for adsorption again and again.
Die Fasern bzw. die Torfmaterialien sind in Türmen oder in einem System von Kästen oder Gruben unterzubringen, welche so herzurichten sind, daß beim Durchleiten von Flüssigkeiten die Fasern vollständig von diesen durchtränkt, aber auch keine Fasern mit weggespült werden können. Beim eigentlichen Betrieb fließen durch diese mit Fasern bzw. Torf angefüllten Behälter abwechselnd Meer- Wasser bzw. Sole usw., und zwar längere Zeit, und Zyanidlösung, letztere kürzere Zeit. Die in der zweiten Arbeitsperiode durch die Anlage hindurchgegangene Zyanidlauge, aus welcher das Edelmetall alsdann nach bekannten Methoden in reiner Form zur Abscheidung gebracht werden soll, .muß bei ihrem Austritt aus der Adsorptionsanlage für sich aufgefangen werden.The fibers or the peat materials are in towers or in a system to accommodate boxes or pits, which are to be prepared so that when passing through of liquids completely soaked the fibers, but also none Fibers can be washed away with. Flow through these during actual operation containers filled with fibers or peat alternating sea water or brine, etc., for a longer time, and cyanide solution, the latter for a shorter time. The cyanide lye that passed through the plant in the second working period, from which the precious metal is then deposited in pure form by known methods is to be brought, .must for itself when it leaves the adsorption system be caught.
Bei der Äusführung des Verfahrens haben sich Fasern der verschiedensten Art, z. B. Leinen-, Hanf-, Jute-, Wolle-,. Kalotropis-, Stroh-, Holz-, Zellulosefasern usw., desgleichen Torf und Torfprodukte verschiedener Herkunft bewährt.When executing the process, fibers of the most varied Kind, e.g. B. linen, hemp, jute, wool ,. Kalotropis, straw, wood, cellulose fibers etc., as well as peat and peat products of various origins.
Die Fasern können sowohl in losem wie auch in locker gepreßtem Zustande, desgleichen in Form von Pappen, Gespinsten oder locker gewebten oder gestrickten Aggregaten angewendet werden. Auch sind Abfälle von Fasern oder Fasernaggregaten verwendbar.The fibers can be used both in a loose and in a loosely compressed state, likewise in the form of cardboard, webbing or loosely woven or knitted Aggregates are applied. There is also waste of fibers or fiber aggregates usable.
Zugabe von geringen Mengen Bromzyan zu clen verdünnten Alkalizyanid- bzw. Zyangaslösungen hat sich als vorteilhaft herausgestellt.Addition of small amounts of cyanogen bromide to the dilute alkali cyanide or cyan gas solutions have proven to be advantageous.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE338128T | 1919-05-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE338128C true DE338128C (en) | 1921-06-13 |
Family
ID=6222219
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1919338128D Expired DE338128C (en) | 1919-05-29 | 1919-05-29 | Process for the extraction of precious metals from very dilute solutions of the same, in particular from sea water, brines and aqueous solutions of the potash works |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE338128C (en) |
-
1919
- 1919-05-29 DE DE1919338128D patent/DE338128C/en not_active Expired
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