DE845944C - Process for the production of stable double salts of acetylsalicylic acid salts - Google Patents

Process for the production of stable double salts of acetylsalicylic acid salts

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Publication number
DE845944C
DE845944C DESCH2866D DESC002866D DE845944C DE 845944 C DE845944 C DE 845944C DE SCH2866 D DESCH2866 D DE SCH2866D DE SC002866 D DESC002866 D DE SC002866D DE 845944 C DE845944 C DE 845944C
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Germany
Prior art keywords
water
acetylsalicylic acid
salt
salts
urea
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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
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DESCH2866D
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German (de)
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Adolf Dr-Ing Schmidgall
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Individual
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Individual
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Priority to DESCH2866D priority Critical patent/DE845944C/en
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C69/00Esters of carboxylic acids; Esters of carbonic or haloformic acids
    • C07C69/76Esters of carboxylic acids having a carboxyl group bound to a carbon atom of a six-membered aromatic ring
    • C07C69/84Esters of carboxylic acids having a carboxyl group bound to a carbon atom of a six-membered aromatic ring of monocyclic hydroxy carboxylic acids, the hydroxy groups and the carboxyl groups of which are bound to carbon atoms of a six-membered aromatic ring
    • C07C69/86Esters of carboxylic acids having a carboxyl group bound to a carbon atom of a six-membered aromatic ring of monocyclic hydroxy carboxylic acids, the hydroxy groups and the carboxyl groups of which are bound to carbon atoms of a six-membered aromatic ring with esterified hydroxyl groups

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

Verfahren zur Herstellung beständiger Doppelsalze von acetylsalicylsauren Salzen Gegenstand des Patents 70-1819 ist ein Verfahren zur Herstellung beständiger Doppelsalze von acetyl- salic\ lsritircii Salzeis. (las darin besteht, daß man Salze der Acet@@lsalicylsäure mit Harnstoff in wäß- riger Lösung vereinigt und die erhaltenen Doppel- salze bei niedrigster Temperatur abscheidet. Bei i diesem Verfahren wird Wasser in einer Menge j \er@@eiidet, die zur vollständigen Lösung der Kom- ponenten des Doppelsalzes genügt. Es wurde gefunden, daß zur Bildung des Doppel- salzes nicht unbedingt soviel Wasser zugegeben werden muß, wie zur vollständigen Lösung der l@eaktionskomponenten genügt, sondern daß die Bildung des Doppelsalzes bereits in Gegenwart einer minimalen Wassermenge erfolgt. Das ertin(ituigsgemäße Verfahren hat gegenüber dem Verfahren des Hauptpatents den Vorteil, daß aus dem Reaktionsgemisch eine bedeutend geringere Menge Wasser verdampft werden muß. Dadurch kann nicht nur an Energie gespart werden, sondern es wird auch die Vorrichtung zur Durchführung der LTinsetzung besser ausgenutzt. Der Vorteil dieses Verfahrens zeigt sich besonders dann, wein inan mit einer geriiigereii Menge M'asser als die Hälfte der zur Lösung der Reaktionskomponenten not- wendigen Wassermenge arbeitet. im Sinne der Erfindung werden das acety1salicyl- saure Salz und der Harnstoff in Gegenwart einer «-assernienge aufeinander zur Einwirkung ge- bracht, die geringer ist als die Hälfte der zur voll- ständigen Lösung dieser Stoffe notwendigen Wassermenge.Process for the preparation of stable double salts of acetylsalicylic acid salts The subject of patent 70-1819 is a method for the production of stable double salts of acetyl- salic \ lsritircii salt ice cream. (read consists in the fact that one Salts of acet @@ lsalicylic acid with urea in aqueous unified solution and the resulting double separates salts at the lowest temperature. At i this method uses water in an amount j \ er @@ eiides, which are necessary for the complete solution of the com- components of the double salt are sufficient. It has been found that for the formation of the double salt does not necessarily add as much water must be how to completely solve the l @ eaction components is sufficient, but that the Formation of the double salt already in the presence of one minimal amount of water. The procedure in accordance with the law has opposite the process of the main patent has the advantage that a significantly lower one from the reaction mixture Amount of water must be evaporated. Through this can not only save energy, but it will also provide the device to carry out the LTinsettlement better used. The advantage of this The procedure is particularly evident when it comes to wine with a little more than half the mass the necessary to dissolve the reaction components agile amount of water works. within the meaning of the invention, the acety1salicyl- acid salt and the urea in the presence of a «-Asserniae to one another to act that is less than half of the constant dissolution of these substances necessary amount of water.

ach einer zweckmäßigen Ausführungsart des Verfahrens wird die Reaktion in Gegenwart einer Wassermenge vorgenommen, welche, auch <las Kristallwasser des acetylsalicylsauren Salzes in Betracht gezogen, auf die wasserfreie Menge des acetvlsalicylsauren Salzes berechnet, weniger als 25 °/o beträgt.After an expedient embodiment of the method, the reaction made in the presence of a quantity of water which, also <read crystal water of the acetylsalicylic acid salt is considered, on the anhydrous amount of the acetylsalicylic acid salt, is less than 25 ° / o.

Man kann auch derart verfahren, daß man kristallwasserhaltiges acetylsalicylsaures Salz verwendet und den Harnstoff in einem mit Wasser mischbaren organischen Lösungsmittel löst. Wenn man die das acetylsalicylsaure Salz in festem Zustand enthaltende Reaktionsmasse rührt, tritt der Harnstoff an die Stelle des Kristallwassers. Aus der Reaktionsmasse wird dann das organische Lösungsmittel mit dem Wasser zusammen verdampft, wobei das Doppelsalz im gebrauchsfertigen Zustand erhalten wird.One can also proceed in such a way that acetylsalicylic acid containing water of crystallization is used Salt used and the urea in a water-miscible organic solvent solves. If the reaction mass containing the acetylsalicylic acid salt in the solid state stirs, the urea takes the place of the water of crystallization. From the reaction mass the organic solvent is then evaporated together with the water, whereby the double salt is obtained in a ready-to-use state.

Man kann ferner derart verfahren, daß man im Reaktionsgemisch die Acetylsalicylsäure, das zur Bildung des Salzes der Acetylsalicylsäure verwendete Salz, z. B. Calciumcarbonat, und den Harnstoff in Gegenwart von Wasser vermischt, wobei dann die Doppelsalzbildung und die Salzbildung der Acetylsalicy1säure in einem einzigen Arbeitsgang vorgenommen wird.You can also proceed in such a way that you in the reaction mixture Acetylsalicylic acid, used to form the salt of acetylsalicylic acid Salt, e.g. B. calcium carbonate, and the urea mixed in the presence of water, where then the double salt formation and the salt formation of acetylsalicic acid in one is carried out in a single operation.

ZurDurchführung des Verfahrens wird besonders vorteilhaft das Calciumsalz der Acetylsalicylsäure verwendet. Doch können auch andere Alkali- und E rdalkalisalze, z. B, das Strontium-, '-Magnesium-und Lithiumsalz, derselben Verwendung finden.The calcium salt is particularly advantageous for carrying out the process the acetylsalicylic acid used. But other alkali and alkaline earth salts, z. B, the strontium, magnesium and lithium salts, are used in the same way.

Zur Durchführung des erfindungsgemäßen Verfahrens werden einige Ausführungsbeispiele angegeben.A few exemplary embodiments are provided for carrying out the method according to the invention specified.

Beispiel i 3989 wasserfreies acetylsalicylsaures Calcium, 6o g Harnstoff und 8o g Wasser werden in einer Ruhrvorrichtung 2 Stunden gerührt. Nach Beendigung des Rührens wird das breiige Produkt, gegebenenfalls nach Entfernung eines Teiles des Wassers durch Ausschleudern, bei Temperaturen unter 4o° getrocknet. An Stelle des wasserfreien acetylsalicylsauren Calciums kann man auch kristallwasserhaltiges Salz verwenden, wobei dann 2 :1fo1 Kristallwasser von der zuzusetzenden Wassermenge abgezogen werden. Beispiel e 434 g kristallines acetylsalicylsaures Calcium und 6o g Harnstoff, in ioo ccm Methanol gelöst, werden in einer Rührvorrichtung 2 Stunden gerührt. Nach der Beendigung des Rühren: wird der Kristallbrei im Vakuum getrocknet. Beispiel 3 36o g Acetylsalicylsäure, ioo g Calciumcarbonat und 6o g Harnstoff werden mit 720 g Wasser vermischt. Das Reaktionsgemisch wird bei Temperaturen unter 40° im Vakuum zur Tro@ckiie ver<lanillft. EXAMPLE 1 3989 anhydrous calcium acetylsalicylic acid, 60 g urea and 80 g water are stirred in a stirrer for 2 hours. After the stirring has ended, the pasty product is dried at temperatures below 40 °, if appropriate after removing some of the water by centrifuging. Instead of the anhydrous calcium acetylsalicylic acid, it is also possible to use a salt containing water of crystallization, in which case 2: 1fo1 of water of crystallization is subtracted from the amount of water to be added. Example e 434 g of crystalline acetylsalicylic acid calcium and 60 g of urea, dissolved in 100 cc of methanol, are stirred in a stirrer for 2 hours. After the end of the stirring: the crystal slurry is dried in vacuo. Example 3 36o g of acetylsalicylic acid, 100 g of calcium carbonate and 60 g of urea are mixed with 720 g of water. The reaction mixture is dried to dryness at temperatures below 40 ° in vacuo.

Claims (3)

PATENTANSPRI`C11 E: i. Verfahren zur Herstellung beständiger Doppelsalze von acetylsalicylsauren Salzen nach Patent 704 8i9, dadurch gekennzeichnet, daß man acetylsalicylsaures Salz und Harnstoff in Gegenwart einer M'assermenge aufeinander einwirken läßt, die geringer ist als die Hälfte der zur vollständigenLösung dieser Stoffe notwendigen Wassermenge. PATENT APPLICATION C11 E: i. Process for the production of permanent double salts of acetylsalicylic acid salts according to patent 704 8i9, characterized in that acetylsalicylic acid salt and urea in the presence of a quantity of water on top of one another can act, which is less than half of the total solution of this Substances necessary amount of water. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß man auch unter Berücksichtigung des Kristallwassers des acetylsalicylsauren Salzes, berechnet auf die Menge des verwendeten wasserfreien acetylsalicylsauren Salzes, in Gegenwart von weniger als 251/o Wasser arbeitet. 2. The method according to claim i, characterized in that that one also takes into account the water of crystallization of acetylsalicylic acid Salt, calculated on the amount of anhydrous acetylsalicylic acid used Salt, works in the presence of less than 251 / o water. 3. Verfahren nach den Ansprüchen i und 2, dadurch gekennzeichnet, daß man ein kristallwasserhaltiges acetvlsalicvlsaures Salz verwendet und den Harnstoff in einem mit Wasser mischbaren organischen Lösungsmittel löst. Verfahren nach den Ansprüchen i und 2. dadurch gekennzeichnet daß man die Bildung des acetylsalicylsaureii Salzes und die Doppelsalzbildung desselben mit Harnstoff in einem Arbeitsgang vornimmt.3. Procedure according to the Claims 1 and 2, characterized in that an acetylsalic acid containing water of crystallization is used Salt used and the urea in a water-miscible organic solvent solves. Process according to claims i and 2. characterized in that the Formation of the acetylsalicylsaureii salt and the double salt formation of the same Makes urea in one operation.
DESCH2866D 1944-01-25 1944-01-25 Process for the production of stable double salts of acetylsalicylic acid salts Expired DE845944C (en)

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DESCH2866D DE845944C (en) 1944-01-25 1944-01-25 Process for the production of stable double salts of acetylsalicylic acid salts

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Application Number Priority Date Filing Date Title
DESCH2866D DE845944C (en) 1944-01-25 1944-01-25 Process for the production of stable double salts of acetylsalicylic acid salts

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DE845944C true DE845944C (en) 1952-08-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2580634A1 (en) * 1985-04-19 1986-10-24 Rhone Poulenc Sante NEW ACETYLSALICYLIC ACID DERIVATIVE, ITS PREPARATION AND PHARMACEUTICAL COMPOSITIONS CONTAINING THE SAME
EP0233459A1 (en) * 1986-01-22 1987-08-26 Artika International (Hong-Kong) Limited Medicament containing a magnesium-urea complex of acetylsalicylic acid and process for the preparation of this complex

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2580634A1 (en) * 1985-04-19 1986-10-24 Rhone Poulenc Sante NEW ACETYLSALICYLIC ACID DERIVATIVE, ITS PREPARATION AND PHARMACEUTICAL COMPOSITIONS CONTAINING THE SAME
EP0200628A1 (en) * 1985-04-19 1986-11-05 Rhone-Poulenc Sante Derivative of acetylsalicylic acid, its preparation and pharmaceutical compositions containing it
US4764637A (en) * 1985-04-19 1988-08-16 Rhone-Poulenc Sante Hydrated magnesium acetylsalicylate/urea complex preparation
EP0233459A1 (en) * 1986-01-22 1987-08-26 Artika International (Hong-Kong) Limited Medicament containing a magnesium-urea complex of acetylsalicylic acid and process for the preparation of this complex

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