DE554877C - Process for the preparation of alkyl aralkyl ethers of colloidal carbohydrates such as cellulose and the like. like - Google Patents

Process for the preparation of alkyl aralkyl ethers of colloidal carbohydrates such as cellulose and the like. like

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Publication number
DE554877C
DE554877C DEI35563D DEI0035563D DE554877C DE 554877 C DE554877 C DE 554877C DE I35563 D DEI35563 D DE I35563D DE I0035563 D DEI0035563 D DE I0035563D DE 554877 C DE554877 C DE 554877C
Authority
DE
Germany
Prior art keywords
cellulose
preparation
carbohydrates
alkyl aralkyl
colloidal
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
Application number
DEI35563D
Other languages
German (de)
Inventor
Dr Eduard Doerr
Dr Otto Leuchs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI35563D priority Critical patent/DE554877C/en
Application granted granted Critical
Publication of DE554877C publication Critical patent/DE554877C/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08BPOLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B11/00Preparation of cellulose ethers
    • C08B11/16Aryl or aralkyl ethers
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08BPOLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B11/00Preparation of cellulose ethers
    • C08B11/193Mixed ethers, i.e. ethers with two or more different etherifying groups

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Description

Verfahren zur Herstellung von Alkylaralkyläthern kolloidaler Kohlenhydrate, wie Cellulose u. dgl. Das vorliegende Verfahren hat die Herstellung von Alkylaralkyläthern kolloider Kohlenhydrate zum Gegenstand. Es ist bekannt, daß man derartige Verbindungen unter bestimmten Konzentrationsverhältnissen der Natronlauge und unter bestimmten Mengenverhältnissen von Cellulose, Wasser und Ätznatron herstellen kann. Es war jedoch bisher unbekannt, welche von diesen möglichen Verbindungen die günstigsten und wertvollsten Eigenschaften besitzen und welche besondere, beste und einfachste Arbeitsweise zu ihrer Herstellung führt. Es wurde gefunden, dä,ß vom technischen Standpunkt aus die hoch aralkylierten, niedrig alkylierten Verbindungen die besten Produkte sind, wobei zu ihrer Herstellung die Anwendung einer im Vergleich zum Alkylierungsmittel relativ geringen Menge Aralkylierungsmittel genügt. Das Verfahren besteht darin, daß man ein kolloides Kohlenhydrat, wie Cellulose u. dgl., in Gegenwart alkalisch wirkender Mittel mit einem Gemisch von Alkylierungsmittel und Aralkylierungsmittel in der Weise behandelt, daß mindestens 2 Mol Aralkylierungsmittel mit etwa io Mol Alkylierungsmittel auf i Mol Kohlenhydrat zur Anwendung kommen. Man erhält so Alkylaralkylverbindungen der Cellulose usw., die relativ hoch aralkyliert und wenig alkyliert, in organischen Lösungsmitteln und Lösungsmittelgemischen löslich sind und sich auf Lacke, Folien, Filme, Kunstseide und plastische Massen u. dgl. mit oder ohne Kampfer bzw. Kampferersatzmitteln, Füllmitteln u. dgl. verarbeiten lassen. Die Darstellung dieser gemischten Äther in der geschilderten Weise hat den Vorteil, daß eine hohe Aralkylierung und niedrige Alkylierung der Cellulose erreicht wird, wodurch Produkte von vorzüglicher Wasserbeständigkeit gewonnen werden. Gleichzeitig wird annähernd nur die theoretische Menge an Alkali gebraucht, so daß auch der Verbrauch an Alkylierungsmittel dementsprechend gering ist. Beispiel i Mol Cellulose wird in q.o- oder 5o%ige Natronlauge eingelegt und nach etwa 3 Stunden auf das dreifache Gewicht abgepreßt. Die Alkalicellulose wird zerkleinert und mit etwa 12 Mol Chloräthyl und etwa 3 Mol Benzylchlorid unter Rühren o. dgl. etwa 4. Stunden auf 8o bis ioo° erhitzt. Das überschüssige Chloräthyl wird abdestilliert. Das Rohprodukt wird mit Wasser und zur Extraktion von Benzylchlorid usw. mit einem organischen Lösungsmittel, wie Äther, Ligroin, Alkohol, gewaschen. Der entstandene Celluloseäther enthält neben Benzoxyl nur etwa 12 bis i 5 0io Äthoxyl. Er ist in Benzolalkohol 7:3 löslich und liefert beim Eintrocknen aus dieser Lösung eine geschmeidige, klare und feste Folie, deren Wasserausdehnung nur etwa 0,3% beträgt. Auf lufttrockene Cellulose bezogen, beträgt die Ausbeute etwa 1¢o%.Process for the preparation of alkyl aralkyl ethers of colloidal carbohydrates, such as cellulose and the like. The present process involves the preparation of alkyl aralkyl ethers colloid carbohydrates. It is known to have such compounds under certain concentration ratios of the sodium hydroxide solution and under certain Can produce proportions of cellulose, water and caustic soda. It was however, it is not yet known which of these possible compounds is the most favorable and possess the most valuable properties and which ones are special, best and simplest Working method leads to their production. It was found that the technical From the standpoint of the highly aralkylated, low alkylated compounds, the best Products are, for their manufacture, the use of a compared to the alkylating agent a relatively small amount of aralkylating agent is sufficient. The procedure consists in that a colloidal carbohydrate, such as cellulose and the like, is alkaline in the presence acting agent with a mixture of alkylating agent and aralkylating agent Treated in such a way that at least 2 moles of aralkylating agent with about 10 moles Alkylating agents are used on one mole of carbohydrate. Alkylaralkyl compounds are obtained in this way cellulose, etc., which are relatively highly aralkylated and poorly alkylated, in organic Solvents and solvent mixtures are soluble and affect paints, foils, Films, artificial silk and plastic masses and the like with or without camphor or camphor substitutes, Let fillers and the like process. The appearance of these mixed ethers in the manner described has the advantage that a high aralkylation and low Alkylation of cellulose is achieved, making products of excellent water resistance be won. At the same time, only approximately the theoretical amount of alkali is used used, so that the consumption of alkylating agent is correspondingly low is. Example i Mol of cellulose is placed in q.o- or 5o% sodium hydroxide solution and after about 3 hours pressed to three times its weight. The alkali cellulose will crushed and mixed with about 12 moles of chloroethyl and about 3 moles of benzyl chloride with stirring or the like. Heated to 80 to 100 ° for about 4 hours. The excess chloroethyl is distilled off. The crude product is mixed with water and used for extraction Benzyl chloride etc. washed with an organic solvent such as ether, ligroin, alcohol. In addition to benzoxyl, the resulting cellulose ether contains only about 12 to 150,000 ethoxyl. It is soluble in benzene alcohol 7: 3 and delivers from this solution when it dries out a supple, clear and strong film, the water expansion of which is only about 0.3%. Based on air-dry cellulose, the yield is about 1 o%.

Andere Alkylierungsmittel und andere Alkalien können in analoger Weise angewandt werden.Other alkylating agents and other alkalis can be used in an analogous manner can be applied.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Alkylaralkyläthern kolloider Kohlenhydrate, wie Cellulose u. dgl., dadurch gekennzeichnet, daß man ein Gemisch von Alkylierungs- und Aralkylierungsmittel im Verhältnis von etwa io oder mehr Mol Alkylierungsmittel zu mindestens 2 Mol oder mehr Aralkylierungsmittel auf i Mol des kolloiden Kohlenhydrates in Gegenwart von Alkalien oder alkalisch wirkenden Mitteln zur Anwendung bringt.PATENT CLAIM: Process for the production of alkyl aralkyl ethers colloidal Carbohydrates, such as cellulose and the like, characterized in that a mixture of alkylating and aralkylating agents in the ratio of about 10 or more moles Alkylating agent to at least 2 moles or more aralkylating agents per 1 mole of colloidal carbohydrates in the presence of alkalis or alkaline agents Brings funds to use.
DEI35563D 1928-09-22 1928-09-22 Process for the preparation of alkyl aralkyl ethers of colloidal carbohydrates such as cellulose and the like. like Expired DE554877C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI35563D DE554877C (en) 1928-09-22 1928-09-22 Process for the preparation of alkyl aralkyl ethers of colloidal carbohydrates such as cellulose and the like. like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI35563D DE554877C (en) 1928-09-22 1928-09-22 Process for the preparation of alkyl aralkyl ethers of colloidal carbohydrates such as cellulose and the like. like

Publications (1)

Publication Number Publication Date
DE554877C true DE554877C (en) 1932-07-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEI35563D Expired DE554877C (en) 1928-09-22 1928-09-22 Process for the preparation of alkyl aralkyl ethers of colloidal carbohydrates such as cellulose and the like. like

Country Status (1)

Country Link
DE (1) DE554877C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE34904E (en) * 1989-10-30 1995-04-11 Hercules Incorporated Alkylaryl hydrophobically modified cellulose ethers
US5504123A (en) * 1994-12-20 1996-04-02 Union Carbide Chemicals & Plastics Technology Corporation Dual functional cellulosic additives for latex compositions
WO1998056825A1 (en) * 1997-06-13 1998-12-17 Akzo Nobel N.V. Hydrophobically modified anionic cellulose ethers
US6372901B1 (en) 1989-01-31 2002-04-16 Union Carbide Corporation Polysaccharides with alkyl-aryl hydrophobes and latex compositions containing same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6372901B1 (en) 1989-01-31 2002-04-16 Union Carbide Corporation Polysaccharides with alkyl-aryl hydrophobes and latex compositions containing same
US6372902B1 (en) 1989-01-31 2002-04-16 Union Carbide Corporation Process for preparing polysaccharides with alkyl-aryl hydrophobes and latex compositions containing same
USRE34904E (en) * 1989-10-30 1995-04-11 Hercules Incorporated Alkylaryl hydrophobically modified cellulose ethers
US5504123A (en) * 1994-12-20 1996-04-02 Union Carbide Chemicals & Plastics Technology Corporation Dual functional cellulosic additives for latex compositions
US5583214A (en) * 1994-12-20 1996-12-10 Union Carbide Chemicals & Plastics Technology Corporation Dual functional cellulosic additives for latex compositions
WO1998056825A1 (en) * 1997-06-13 1998-12-17 Akzo Nobel N.V. Hydrophobically modified anionic cellulose ethers
US6627751B1 (en) 1997-06-13 2003-09-30 Akko Nobel N.V. Hydrophobically modified anionic cellulose ethers

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