DE412167C - Process for the preparation of reversible hydrosols and gels of base heavy metals - Google Patents
Process for the preparation of reversible hydrosols and gels of base heavy metalsInfo
- Publication number
- DE412167C DE412167C DEB105358D DEB0105358D DE412167C DE 412167 C DE412167 C DE 412167C DE B105358 D DEB105358 D DE B105358D DE B0105358 D DEB0105358 D DE B0105358D DE 412167 C DE412167 C DE 412167C
- Authority
- DE
- Germany
- Prior art keywords
- hydrosols
- gels
- reversible
- metal
- preparation
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/0004—Preparation of sols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/0004—Preparation of sols
- B01J13/0043—Preparation of sols containing elemental metal
Description
Verfahren zur Darstellung von reversiblen Hydrosolen und Gelen unedler Schwermetalle.Process for the preparation of reversible hydrosols and gels of base Heavy metals.
Die Herstellung irreversibler Metallhydrosole ist bekannt. Die so erreichbare Konzentration an Metall überschreitet fast niemals O, I Prozent. Des weiteren ist die Herstellung reversibler Hydrosole der Edelmetallie, wie Gold, Silber, Palladium, Platin, in Gegenwart von Schutzkolloiden bekannt. So gelingt es z.B. (vgl. Svoedberg, Herstellung kolloider Lösungen anorganischer Stoff, III. Stufe S. 35, Abs.5) durch Kombination von Reduktion und Iseimwirkung Edelmetallsole höheren Metallgehaltes in verschiedener Korngröße herzustellen. Im reversiblen Gel läßt sich eine Anreicherung bis zu 80 bis go Prozent an Metall erhalten. The production of irreversible metal hydrosols is known. The so The achievable concentration of metal almost never exceeds 0.1 percent. Of further is the production of reversible hydrosols of precious metals, such as gold, silver, Palladium, platinum, known in the presence of protective colloids. So it succeeds e.g. (cf. Svoedberg, Production of Colloidal Solutions of Inorganic Substance, Stage III S. 35, Paragraph 5) by a combination of reduction and Iseim effect precious metal brine higher To produce metal content in different grain sizes. Lets in the reversible gel An enrichment of up to 80 to go percent of metal is preserved.
Es wurde nun die bemerkenswerte Tatsache gefunden, daß durch Anwendung des aKeimverfahrens«, d. h. durch Impfen mit Edelmetalisolen bzw. durch primäre Erzeugung von solchen in der Reduktionslösung, auf die unedlen Schwermetalle (z. B. Nickel, Kobalt, Eisen, Mangan, Chrom, Quecksilbier und Kupfer) sich die reversiblen Hydrosole und Gele derselben bzw. deren Oxyde herstellen lassen. Man löst ein wasserlösliches Salz des betreffenden Metalles oder erzeugt eine feingeschlemmtie Suspension einer unlöslichen Verbindung in Wasser, gibt die wässerige Lösung eines Schutzkolloides, wie Gummiarabicum, Gelatine, Tragan, lysalbinsaunes Natron, Saponin o. dgl., hinzu und reduziert die Metallsalzlösung nach Zusatz kolloidaler Lösungen oder einer Aufschwemmung eines feinverteilten Edelmetalles, wie Platin oder -Palladium, mittels eines kräftigen Reduktionsmittels, wie z. B. Hydrazinhydrat, oder mittels Hydrazinsalzes in Gegenwart von Alkali. The remarkable fact has now been found that by application of the germination process «, d. H. by inoculation with noble metal sols or by primary Generation of such in the reducing solution, on the base heavy metals (e.g. B. nickel, cobalt, iron, manganese, chromium, mercury beer and copper) are reversible Hydrosols and gels of the same or their oxides can be produced. One dissolves a water-soluble Salt of the metal in question or creates a fine suspension of a insoluble compound in water, gives the aqueous solution of a protective colloid, such as gum arabic, gelatine, tragacanth, lysalbine saunas, soda, saponin or the like and reduces the metal salt solution after adding colloidal solutions or a suspension of a finely divided precious metal, such as platinum or palladium, by means of a strong Reducing agent, such as. B. hydrazine hydrate, or by means of hydrazine salt in the presence of alkali.
Die Lösungen von-Quecksilber- Kupfersalzen werden hierbei spontan von dem Reduktionsmittel zu Metall reduziert. Kolloidales Nickel wird z. B. hergestellt durch Reduktion von Nickelacetatlösung, der als Schutzkolloid einige Prozent Gummiarabicumlösung zugefügt sind, mittels Hydrazinhydrates und Spuren kolloidaler Edelmetalle. The solutions of mercury copper salts become spontaneous reduced by the reducing agent to metal. Colloidal nickel is e.g. B. manufactured by reducing nickel acetate solution, which acts as a protective colloid with a few percent gum arabic solution are added, by means of hydrazine hydrates and traces of colloidal precious metals.
Kupfersalzlösungen lassen sich in Gegenwart von Gummiarabicum und nach Zugabe feinverteilter oder kolloidaler Edelmetalle auch durch Ävasserstoffgas in der Hitze bis zum metallischen Kupfer reduzieren. Nicht alle Metallsalzlösungen sind aber ohne weiteres zu Metall reduzierbar, namentlich nicht die jenigen von Metallen, welche in mehreren Oxydstoffen vorkommen; diese werden unter den üblichen Bedingungen fast immer zu den niedrigsten Oxydstufen reduziert. So entstehen kolloidale Chrom- oder Mangan-Oxyd-Lösungen. Copper salt solutions can be in the presence of gum arabic and after the addition of finely divided or colloidal precious metals, also by means of hydrogen gas reduce in the heat to metallic copper. Not all metal salt solutions but are easily reducible to metal, especially not those of Metals, which occur in several oxides; these are among the usual Conditions almost always reduced to the lowest oxide levels. This is how colloidal ones are formed Chromium or manganese oxide solutions.
Anderseits gelingt es auch, unter Einhaltung gewisser Bedingungen schon bereits zu Metall reduzierte Lösungen, wie z. B. solche von Kupfer, durch vorsichtige Oxydation mit Wasserstoffsuperoxyd wieder zur Oxydstufie zurückzuoxydieren. On the other hand, it is also possible if certain conditions are met Solutions that have already been reduced to metal, such as B. those of copper Careful oxidation with hydrogen peroxide to re-oxidize again to the oxyd stage.
Zur Ermittelung dieser Bedingungen bedarf es nur der üblichen handwerksmäßigen Fachkennmis eines Kolloidchemikers. To determine these conditions, only the usual craftsmanship is required Expertise of a colloid chemist.
Die so hergestellten Hydrosole enthalten bis zu 10 Prozent, gelegentlich auch mehr, des betreffenden Metalles oder Metalloxydes und geben dasselbe beim Schütteln mit Adsorbentien, wie Kieselgur, Asbest, Ton usw., fast quantitativ ab, so daß man auf dieser Weise auf diesen Materialien feinverteilte Metall- bzw. Metalloxydniederschläge erzeugen kann. Die Hydrosole selbst lassen sich vorsichtig zweckmäßig im Vakuum oder im indifferenten Gasstrom nach vorgehender dialytischer Entfernung der Elektrolyte zu reversiblen Gelen eindampfen, die braun bis schwarz metallisch glänzende Massen bilden und zu Hydrosolen beliebiger Konzentration nieder auflösbar sind. Die Gele selbst lassen sich bis zu 80 Prozent, in Einzelfällen auch bis über go Prozent, an Metall oder Metalloxyd anreichern. Vereinzelte Ausflockungen, die hierbei vorkommen, sind durch an sich bekannte Methoden der Peptisation wieder in Lösung zu bringen. The hydrosols produced in this way contain up to 10 percent, occasionally also more, of the metal or metal oxide in question and give the same when shaking with adsorbents such as diatomaceous earth, asbestos, clay, etc., almost quantitatively, so that one finely divided in this way on these materials Can generate metal or metal oxide deposits. Leave the hydrosols by themselves cautiously expediently in a vacuum or in an inert gas stream after preceding Dialytic removal of the electrolytes to evaporate reversible gels that brown Form masses with a metallic sheen in black and hydrosols of any concentration are less resolvable. The gels themselves can be up to 80 percent, in individual cases also enrich up to over percent, in metal or metal oxide. Occasional flocculation, which occur here are again by peptization methods known per se to bring into solution.
Die dergestalt hergestellten Metalle bzw. The metals produced in this way or
Metalloxyd-Hydrosole und Gele sollen zur Ausführung katalytischer Reaktionen, für pharmazeutische oder sonstige technische Zwecke Verwendung finden.Metal oxide hydrosols and gels are designed to run catalytic Reactions, find use for pharmaceutical or other technical purposes.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB105358D DE412167C (en) | 1922-06-22 | 1922-06-22 | Process for the preparation of reversible hydrosols and gels of base heavy metals |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB105358D DE412167C (en) | 1922-06-22 | 1922-06-22 | Process for the preparation of reversible hydrosols and gels of base heavy metals |
Publications (1)
Publication Number | Publication Date |
---|---|
DE412167C true DE412167C (en) | 1925-04-15 |
Family
ID=6991316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB105358D Expired DE412167C (en) | 1922-06-22 | 1922-06-22 | Process for the preparation of reversible hydrosols and gels of base heavy metals |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE412167C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE739511C (en) * | 1939-03-10 | 1943-09-28 | Dr Hans P Kaufmann | Process for the production of colloidal silver preparations |
-
1922
- 1922-06-22 DE DEB105358D patent/DE412167C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE739511C (en) * | 1939-03-10 | 1943-09-28 | Dr Hans P Kaufmann | Process for the production of colloidal silver preparations |
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