DE94628C - - Google Patents

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Publication number
DE94628C
DE94628C DENDAT94628D DE94628DA DE94628C DE 94628 C DE94628 C DE 94628C DE NDAT94628 D DENDAT94628 D DE NDAT94628D DE 94628D A DE94628D A DE 94628DA DE 94628 C DE94628 C DE 94628C
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Germany
Prior art keywords
formaldehyde
starch
compounds
hours
mass
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Application number
DENDAT94628D
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German (de)
Publication of DE94628C publication Critical patent/DE94628C/de
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Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08BPOLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B31/00Preparation of derivatives of starch

Description

he* 3iaihe * 3iai

KAISERLICHESIMPERIAL

PATENTAMT. V^PATENT OFFICE. V ^

In dem Patent Nr. 92259 ist ein Verfahren beschrieben, mittelst dessen man zu Formaldehydverbindungen der oben bezeichneten Substanzen gelangt. Weitere Versuche in dieser Richtung haben nun ergeben, dafs an Formaldehyd reichere Verbindungen erhalten werden, wenn man die Einwirkung des Formaldehyds bei Temperaturen zwischen 120 bis 1300 C. vor sich gehen läfst und die schliefslich erhaltene Masse wiederholt mit Formaldehyd in derselben Weise behandelt. Die Art der Darstellung ergiebt sich aus folgenden Beispielen:Patent No. 92259 describes a process by means of which formaldehyde compounds of the substances mentioned above are obtained. Further experiments in this direction have now shown, that richer compounds are obtained of formaldehyde if one läfst proceed the action of formaldehyde at temperatures between 120 to 130 0 C. and the mass obtained schliefslich repeatedly treated with formaldehyde in the same manner. The type of representation results from the following examples:

i. 5 kg Stärke u. s. w. werden im Autoclaven mit einem Ueberschufs von 40 proc. Formaldehyd, 1,5 bis 2 1, übergössen, durchgerührt und das hermetisch verschlossene Gefäfs 5 bis 6 Stunden lang einer Temperatur von 120 bis 1300C. ausgesetzt. Nach dem Erkalten wird die Masse, welche noch reichlich Formaldehyd enthält, aus dem Gefäfs herausgenommen und nun zur weiteren Einwirkung des Formaldehyds auf die Stärke oder dergl. weitere 24 Stunden auf 120 bis 1300 C. im Trockenschrank erhitzt.· Die erhaltene Masse wird nun in einer Kugelmühle fein gepulvert, nochmals mit 1,5 bis 2 1 Formaldehyd angerührt und die vorhin beschriebene Manipulation wiederholt. Zur Entfernung des noch vorhandenen freien Formaldehyds in dem schliefslich erhaltenen Reactionsproduct wird dasselbe mit Wasser oder einem anderen Lösungsmittel für Formaldehyd behandelt und dann bei ioo° C. getrocknet.i. 5 kg strength etc. are in the autoclave with an excess of 40 per cent. Formaldehyde, 1.5 to 2 1, poured over, stirred and long exposed to the hermetically sealed vessel, 5 to 6 hours to a temperature of 120 to 130 0 C.. After cooling, the mass, which still plenty of formaldehyde is taken out from the vessel, and heated now available for further action of formaldehyde on the strength or the like. Additional 24 hours at 120 to 130 0 C. in a drying cabinet. · The mass obtained is then Finely powdered in a ball mill, mixed again with 1.5 to 2 liters of formaldehyde and the manipulation described above repeated. To remove the free formaldehyde still present in the reaction product finally obtained, it is treated with water or another solvent for formaldehyde and then dried at 100 ° C.

2. 3 kg Stärke werden mit 0,5 kg Trioxymethylen gemengt, 24 Stunden lang auf 1 200 C. im Autoclaven erhitzt und die Manipulation mit Trioxymethylen wiederholt. Die schliefslich erhaltene Verbindung wird wie unter 1. angegeben gereinigt.2. 3 kg of starch are mixed with 0.5 kg of trioxymethylene, heated for 24 hours at 1 20 0 C. in an autoclave and repeated manipulation with trioxymethylene. The compound finally obtained is purified as indicated under 1.

Claims (1)

Patent-Anspruch:Patent claim: Eine Ausführungsform des durch das Patent Nr.92259 geschützten Verfahrens zur Darstellung von Verbindungen der Stärke und stärkeähnlicher Substanzen mit Formaldehyd, darin bestehend, dafs man behufs Gewinnung von an Formaldehyd reicheren Verbindungen die dort genannte Behandlung der Stärke etc. mit dem Formaldehyd wiederholt vornimmt.An embodiment of the method of representation protected by Patent No. 92259 of compounds of starch and starch-like substances with formaldehyde, consisting of that in order to obtain compounds richer in formaldehyde, the treatment of starch, etc. mentioned there with the Formaldehyde repeatedly.
DENDAT94628D Active DE94628C (en)

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DE94628C true DE94628C (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2761365A1 (en) * 1997-04-01 1998-10-02 Syndicat Interprofessionnel Bi NEW CROSS-LINKED BIOLOGICAL PRODUCTS, PROCESS FOR OBTAINING THEM AND THEIR APPLICATION AS STRIPPING PRODUCTS

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2761365A1 (en) * 1997-04-01 1998-10-02 Syndicat Interprofessionnel Bi NEW CROSS-LINKED BIOLOGICAL PRODUCTS, PROCESS FOR OBTAINING THEM AND THEIR APPLICATION AS STRIPPING PRODUCTS
WO1998044004A1 (en) * 1997-04-01 1998-10-08 Syndicat Interprofessionnel Biodecap Crosslinked biological products, process for obtaining such products, and their use as removers
US6147175A (en) * 1997-04-01 2000-11-14 Syndicat Interprofessionnel Biodecap Crosslinked biological products, process for obtaining such products, and their use as removers
CN1093137C (en) * 1997-04-01 2002-10-23 生物除垢综合专业联合会 Crosslinked biological products, process for obtaining such products, and their use as removers

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