AT73374B - Process for the preparation of oxalic acid. - Google Patents

Process for the preparation of oxalic acid.

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Publication number
AT73374B
AT73374B AT73374DA AT73374B AT 73374 B AT73374 B AT 73374B AT 73374D A AT73374D A AT 73374DA AT 73374 B AT73374 B AT 73374B
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AT
Austria
Prior art keywords
preparation
oxalic acid
acid
sugar
oxidation
Prior art date
Application number
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German (de)
Original Assignee
Kinzlberger & Comp
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.)
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Publication date
Application filed by Kinzlberger & Comp filed Critical Kinzlberger & Comp
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Publication of AT73374B publication Critical patent/AT73374B/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Darstellung von Oxalsäure. 



   Im Patente Nr.   73373   wurde ein Verfahren zur Darstellung von   Oxalsäure   aus Zucker und anderen Kohlehydraten beschrieben, darin bestehend, dass man auf Kohlehydrate bei Gegenwart von Salpetersäure und Katalysatoren Untersalpetersäure einwirken   ! asst. Es   hat sich nun gezeigt, dass bei dieser Oxydation von Kohlehydraten zu Oxalsäure die Gegenwart von Salpetersäure nicht notwendig ist. Man kann, bei sonstiger Einhaltung der Versuchsbedingungen, die dort verwendete, konzentrierte Salpetersäure, welche zum mindesten bei Beginn der Reaktion Oxydierend wirken wird, durch blosse Absorptionsmittel für die Untersalpetersäure wie verdünnte Salpetersäure, Wasser, Eisessig usw. ersetzen. man kann auch ganz ohne Lösungsmittel arbeiten. 



   B e i s p i e l I : Durch eine Lösung von 100 kg Zucker, 2   kg Molybdänoxyd, 100 kg   
 EMI1.1 
 Sobald die Lösung von Kristallen erfillt ist, filtriert man ab, versetzt das Filtrat wieder mit Zucker, etwa so viel als verbraucht wurde. und leitet von neuem Untersalpetersäure ein. 
 EMI1.2 
 Schicht auf   Hürden   ausgebreitet und der Einwirkung von Untersalpetersäure ausgesetzt. 



  Der Zucker verwandelt sich allmählich in Oxalsäure. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Process for the preparation of oxalic acid.



   In patent no. 73373 a process for the preparation of oxalic acid from sugar and other carbohydrates was described, consisting in acting on carbohydrates in the presence of nitric acid and catalysts! asst. It has now been shown that the presence of nitric acid is not necessary for this oxidation of carbohydrates to oxalic acid. If the experimental conditions are otherwise observed, the concentrated nitric acid used there, which will have an oxidizing effect at least at the beginning of the reaction, can be replaced by mere absorbents for the subnitric acid such as dilute nitric acid, water, glacial acetic acid, etc. you can also work completely without a solvent.



   Example I: By a solution of 100 kg of sugar, 2 kg of molybdenum oxide, 100 kg
 EMI1.1
 As soon as the solution is filled with crystals, it is filtered off, and the filtrate is again mixed with sugar, about as much as was consumed. and introduces again sub-nitric acid.
 EMI1.2
 Layer spread out on hurdles and exposed to the action of subnitric acid.



  The sugar gradually turns into oxalic acid.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Darstellung von Oxalsaure durch Oxydation von Zucker und anderen Kohlehydraten in Gegenwart von Katalysatoren, dadurch gekennzeichnet, dass man die Oxydation mit Hilfe von aussen her zugefuhrten, höheren Stickstoffoxyden, wie Untersalpetersäure, durchführt. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Process for the preparation of oxalic acid by oxidation of sugar and other carbohydrates in the presence of catalysts, characterized in that the oxidation is carried out with the aid of externally supplied, higher nitrogen oxides, such as subnitric acid. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT73374D 1914-03-16 1914-03-16 Process for the preparation of oxalic acid. AT73374B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT73374T 1914-03-16

Publications (1)

Publication Number Publication Date
AT73374B true AT73374B (en) 1917-05-10

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ID=3595022

Family Applications (1)

Application Number Title Priority Date Filing Date
AT73374D AT73374B (en) 1914-03-16 1914-03-16 Process for the preparation of oxalic acid.

Country Status (1)

Country Link
AT (1) AT73374B (en)

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