DE877745C - Process for the deflocculation of finely distributed inorganic substances - Google Patents
Process for the deflocculation of finely distributed inorganic substancesInfo
- Publication number
- DE877745C DE877745C DER1986D DER0001986D DE877745C DE 877745 C DE877745 C DE 877745C DE R1986 D DER1986 D DE R1986D DE R0001986 D DER0001986 D DE R0001986D DE 877745 C DE877745 C DE 877745C
- Authority
- DE
- Germany
- Prior art keywords
- parts
- deflocculation
- inorganic substances
- finely distributed
- water
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B11/00—Preparation of cellulose ethers
- C08B11/02—Alkyl or cycloalkyl ethers
- C08B11/04—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals
- C08B11/10—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals substituted with acid radicals
- C08B11/12—Alkyl or cycloalkyl ethers with substituted hydrocarbon radicals substituted with acid radicals substituted with carboxylic radicals, e.g. carboxymethylcellulose [CMC]
-
- 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
- B01J13/0034—Additives, e.g. in view of promoting stabilisation or peptisation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Dispersion Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Description
Verfahren zum Entflocken von feinst verteilten anorganischen Stoffen Es ist bekannt, daß Pflanzenschleime und Pflanzenelxtrakte, wie z. B. Norgine, Tannin, Gummiarten, Dextrin und andere mehr, als Schutzkolloide dienen. Ferner ist auch bekannt, daß einige dieser Stoffe, wie z. B. Tannin, gut zum Entflocken, d. h. zur Verhinderung des Ausfiockens feinst gemahlener, praktisch unlöslicher Stoffe zu gebrauchen sind.Process for deflocculating finely distributed inorganic substances It it is known that plant mucilages and plant extracts, such as. B. Norgine, tannin, Types of rubber, dextrin and others, serve as protective colloids. Furthermore is also known that some of these substances, such as. B. tannin, good for deflocculation, d. H. to the Prevention of the flocculation of finely ground, practically insoluble substances are in use.
Es wurde nun gefunden, daß wasserlösliche Salze von Celluloseäthercarbonsäuren, insbesondere der Celluloseätherglykolsäure, sich vorzüglich zum Entilocken unlöslicher Stoffe eignen und daß die Entflockung damit auch selbst dann durchgeführt werden kann, wenn gleichzeitig andere, nicht zum Entflocken geeignete Schutzkolloide, wie z. B. It has now been found that water-soluble salts of cellulose ether carboxylic acids, especially cellulose ether glycolic acid, which is excellent for unlocking insolubles Substances are suitable and that the deflocculation can then also be carried out with them can, if at the same time other protective colloids not suitable for deflocculation, such as z. B.
Sulfitablauge, zugegen sind. Es wurde ferner gefunden, daß es nicht notwendig ist, die chemisch reinen Salze der Celluloseäthercarbonsäuren zu verwenden, sondern daß hierfür auch die bei ihre!r Herstellung anfallenden Rohprodukte bzw. Reaktionsgemische, beispielsweise die Einwirkungsprodukte von Halogenfettsäuren auf Alkalicellulose, geeignet sind. Ein besonderer Vorteil ist darin zu erblicken, daß in. diesem Fall bei der Entilockung oft bis auf 1lio des reinen Präparats zurückgegangen werden kann.Sulphite waste liquor, are present. It was also found that it was not it is necessary to use the chemically pure salts of the cellulose ether carboxylic acids, but that for this purpose the raw products or Reaction mixtures, for example the action products of halogen fatty acids on alkali cellulose, are suitable. A particular advantage can be seen in that in this case, on unlocking, it was often reduced to as little as 1lio of the pure preparation can be.
Man verfährt dabei so, daß man den feinst gemahlenden Stoff, beispielsweise Braunstein, Graphit, Talkum oder Zinkoxyd, mit Wasser und einem wasserlöslichen celluloseäthercarbonsauren Salz, gegebenenfalls bei Gegenwart noch eines Schutzkolloids, verknetet oder auch in der Kugelmühle vermahlt. Die erhaltene Masse wird dann in viel Wasser suspendiert. Beim Sedimentieren bildet sich nach einiger Zeit ein stichfester Bodensatz, der die groben Anteile enthält; während in der überstehenden Flüssigkeit das Sol sich beEndet. Dieses läßt sich dann durch Fällen, z. B. durch Kochen mit verdünnter Salzsäure, in das Gel zurückführen, filtrieren und durch Waschen von störenden Salzen befreien. Durch Peptisation mit Ammoniak läßt sich das Gel wieder in die disperse Phase zurückverwandeln. The procedure is so that the finely ground substance, for example Brownstone, graphite, talc or zinc oxide, with water and a water-soluble one cellulose ether carboxylic acid salt, optionally in the presence of a protective colloid, kneaded or in the ball mill married. The mass obtained is then suspended in plenty of water. When sedimenting, it forms after a while Time a solid sediment that contains the coarse parts; while in the protruding Liquid the sol ends. This can then be done by cases, e.g. B. by Boil with dilute hydrochloric acid, return to the gel, filter and wash off free from disruptive salts. The gel can be peptized with ammonia convert back to the disperse phase.
Beispiel I 100 Teile feinst gemahlener Braunstein, 3 Teile Natriumcelluloseglykolat, 3 Teile Ammoniak und Wasser nach Bedarf werden mehrere Stunden in der Knetmaschine verarbeitet. Das Knetgut wird dann in 2000 Teilen Wasser aufgeschlämmt und 214 bis 48 Stunden stehengelassen. Durch Abhebern der über dem Bodensatz stehenden wäßrigen Phase lassen sich die Mikronen und Ultramikronen von den gröberen Anteilen trennen. Durch Kochen mit 30 Teilen roher, technisch konzentrierter Salzsäure wird das Sol geflockt und durch Filtration ah geschieden. Example I 100 parts of finely ground manganese dioxide, 3 parts of sodium cellulose glycolate, 3 parts ammonia and water as needed are in the kneading machine for several hours processed. The kneaded material is then slurried in 2000 parts of water and 214 bis Left for 48 hours. By siphoning off the aqueous Phase, the microns and ultra-microns can be separated from the coarser parts. By boiling with 30 parts of crude, technically concentrated hydrochloric acid, the sol flocculated and divorced by filtration ah.
Beispiel 2 100 Teile Talkum, 3 Teile Natriumcellüloseglykolat, 3 Teile Ammoniak, 300 bis 350 Teile Wasser werden in der Kugelmühle 48 Stunden vermahlen und das Mahlgut, wie im Beispiel I beschrieben, weiterbehandelt. Example 2 100 parts of talc, 3 parts of sodium cellulose glycolate, 3 Parts of ammonia and 300 to 350 parts of water are ground in a ball mill for 48 hours and the millbase, as described in Example I, treated further.
Beispiel 3 IOO Teile Graphit, 5 Teile Sulfitablauge, 5 Teile einer 2o0/oigen Lösung von Ammoniumcelluloseglykolat, 3 Teile Ammoniak, 350 Teile Wasser werden entsprechend Beispiel 2 behandelt. Example 3 100 parts of graphite, 5 parts of sulphite waste liquor, 5 parts of a 20% solution of ammonium cellulose glycolate, 3 parts of ammonia, 350 parts of water are treated according to example 2.
Beispiel 4 I 00 Teile Zinkoxyd, 45 Teile Reaktionsprodukt aus Monochloressigsäure und Cellulosenatron, durch Behandlung von Cellulose mit starker Natronlauge erhalten, 3 Teile Ammoniak, 300 bis 350 Teile Wasser werden entsprechend Beispiel 2 verarbeitet. Example 4 100 parts of zinc oxide, 45 parts of reaction product from monochloroacetic acid and cellulose soda, obtained by treating cellulose with strong caustic soda, 3 parts of ammonia and 300 to 350 parts of water are processed as in Example 2.
PATENTANSPRACHE: 1. Verfahren zum Enfflocken von feinst verteilten anorganischen Stoffen, dadurch gekennzeichnet, daß als Enfflockungsmittel wasserlösliche Salze von Celluloseäthercarbons änren, vorzugsweise Celluloseätherglykolate, verwendet werden. PATENT APPEAL: 1. Method for flaking finely distributed particles inorganic substances, characterized in that water-soluble as deflocculant Salts of cellulose ether carbons, preferably cellulose ether glycolates, are used will.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER1986D DE877745C (en) | 1944-04-30 | 1944-04-30 | Process for the deflocculation of finely distributed inorganic substances |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER1986D DE877745C (en) | 1944-04-30 | 1944-04-30 | Process for the deflocculation of finely distributed inorganic substances |
Publications (1)
Publication Number | Publication Date |
---|---|
DE877745C true DE877745C (en) | 1953-05-26 |
Family
ID=7395780
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DER1986D Expired DE877745C (en) | 1944-04-30 | 1944-04-30 | Process for the deflocculation of finely distributed inorganic substances |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE877745C (en) |
-
1944
- 1944-04-30 DE DER1986D patent/DE877745C/en not_active Expired
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