DE962747C - Process for accelerating the water absorption of cellulose derivatives which are swellable in water - Google Patents
Process for accelerating the water absorption of cellulose derivatives which are swellable in waterInfo
- Publication number
- DE962747C DE962747C DEB20845A DEB0020845A DE962747C DE 962747 C DE962747 C DE 962747C DE B20845 A DEB20845 A DE B20845A DE B0020845 A DEB0020845 A DE B0020845A DE 962747 C DE962747 C DE 962747C
- Authority
- DE
- Germany
- Prior art keywords
- water
- cellulose derivatives
- swellable
- accelerating
- swelling
- 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
- C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
-
- 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
- C08B11/20—Post-etherification treatments of chemical or physical type, e.g. mixed etherification in two steps, including purification
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/08—Cellulose derivatives
- C08L1/26—Cellulose ethers
- C08L1/28—Alkyl ethers
- C08L1/286—Alkyl ethers substituted with acid radicals, e.g. carboxymethyl cellulose [CMC]
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- External Artificial Organs (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Beschleunigung der Wasseraufnahme von in Wasser quellfähigen Cellulosederivaten Die Verwendung von Huminsäureverbindungen als Quellungsbeschleuniger für in VVasse.r quellfähige Cellulosederivate, wie Methylcellulose oder Carboxymethylcellulose, ist bislang in der I iteratur nicht beschrieben worden. Eine Beschleunigung der Quellung ist aber für viele technische Verfahren von erheblicher Bedeutung. In der Mehrzahl der bisher bekanntgewordenen Fälle können die Quellstoffe erst nach vollständiger Ausquellung eine weitere Verwendung finden. Sonach ergibt sich, daß eine Anwendung der hier beschriebenen Erfindung in einer großen Zahl von Fällen einen erheblichen Zeitgewinn (wie unten angeführt ist) bedeutet. Daneben bietet sich auch dei Vorteil, daß durch den Zusatz von Huminsäureverbindungen in einer bestimmten Konzentration als Quellungsbeschleuniger eine gleichmäßig e Aufquellung ohne Verklumpung des Quellungsmittels erzielt wird.Process for accelerating the water uptake of water-swellable Cellulose derivatives The use of humic acid compounds as swelling accelerators for cellulose derivatives that swell in VVasse.r, such as methyl cellulose or carboxymethyl cellulose, has not yet been described in the literature. An acceleration of the However, swelling is of considerable importance for many technical processes. In the Most of the cases that have become known to date can only remove the swelling substances after they have been completely Swelling find another use. It follows that an application of the invention described herein in a large number of cases a significant one Time saving (as stated below) means. In addition, there is also the advantage that by adding humic acid compounds in a certain concentration as a swelling accelerator, a uniform swelling without clumping of the swelling agent is achieved.
Die in Wasser quellfähigen Cellulosederivate, insbesondere die Methylcellulose, setzen sich auf unterschiedlichen Gebieten der Technik in zunehmendem Maße durch. Methylcellulose findet z. B. mit gutem Erfolg bei Erdölbohrungen als Bohrspülungsmittel Verwendung, wobei ihre Verarbeitung durch möglichst vollständiges und gleichmäßiges Aufquellen wesentlich erleichtert wird. The water-swellable cellulose derivatives, especially methyl cellulose, are becoming increasingly popular in various areas of technology. Methyl cellulose finds z. B. with good success in oil drilling as a drilling fluid Use, with their processing as complete and uniform as possible Swelling is made much easier.
Als Beispiel eines weiteren Anwendungsgebietes mag noch die Gießerei genannt werden, in der Methylcellulose als Kerusandbindemittel benutzt wird, wozu ebenfalls ein gleichmäßiges und vollständiges Aufquellen der Cellulose Vorbedingung ist. The foundry is an example of a further area of application in which methyl cellulose is used as a kerosene sand binder, for which purpose Also a uniform and complete swelling of the cellulose is a prerequisite is.
Beispiel I 98 g Carboxymethylcellulose werden mit 2 g Natriumhuniat gemischt. Das in einen Dialysierschlauch eingebrachte Gemisch wird in ein wäßriges Milieu gegeben, das einem p11 von etwa 7 entspricht. Example I 98 g of carboxymethyl cellulose are mixed with 2 g of sodium chloride mixed. The mixture introduced into a dialysis tube is converted into an aqueous milieu which corresponds to a p11 of about 7.
Eine unter gleichen Verhältnissen, jedoch ohne Humatzusatz angesetzte Probe benötigt zur vollständigen Ausquellung wenigstens die doppelte Zeit (20 Stunden gegenüber 45 Stunden). One prepared under the same conditions, but without the addition of humate The sample needs at least twice as long to swell completely (20 hours compared to 45 hours).
Beispiel 2 Verwendet man die gleiche Versuchsanordnung, wie im Beispiel I angegeben, unter Benutzung von Methylcellulose, so. zeigen sich älmliche Effekte wie beim Beispiel I. Example 2 The same experimental set-up is used as in the example I stated using methyl cellulose, so. there are similar effects as in example I.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB20845A DE962747C (en) | 1952-06-19 | 1952-06-19 | Process for accelerating the water absorption of cellulose derivatives which are swellable in water |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB20845A DE962747C (en) | 1952-06-19 | 1952-06-19 | Process for accelerating the water absorption of cellulose derivatives which are swellable in water |
Publications (1)
Publication Number | Publication Date |
---|---|
DE962747C true DE962747C (en) | 1957-04-25 |
Family
ID=6960445
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB20845A Expired DE962747C (en) | 1952-06-19 | 1952-06-19 | Process for accelerating the water absorption of cellulose derivatives which are swellable in water |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE962747C (en) |
-
1952
- 1952-06-19 DE DEB20845A patent/DE962747C/en not_active Expired
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