AT39290B - Process for the preparation of durable double compounds of aldehydes with reduction products of sulphurous acid. - Google Patents

Process for the preparation of durable double compounds of aldehydes with reduction products of sulphurous acid.

Info

Publication number
AT39290B
AT39290B AT39290DA AT39290B AT 39290 B AT39290 B AT 39290B AT 39290D A AT39290D A AT 39290DA AT 39290 B AT39290 B AT 39290B
Authority
AT
Austria
Prior art keywords
aldehydes
preparation
sulphurous acid
reduction products
double compounds
Prior art date
Application number
Other languages
German (de)
Original Assignee
R Englert & Dr F Becker Fa
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
Priority claimed from DE1905202826D external-priority patent/DE202826C/de
Application filed by R Englert & Dr F Becker Fa filed Critical R Englert & Dr F Becker Fa
Application granted granted Critical
Publication of AT39290B publication Critical patent/AT39290B/en

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  • Catalysts (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Darstellung haltbarer Doppelverbindungen von Aldehyden mit Reduktionsprodukten der schwefligen Säure. 



   Nach dem Stamm-Patent Nr.   37921 erhält   man bei Zuleiten von schwefliger Saure zu einem Gemisch gleicher Äquivalente Zinkstaub und Aldehyd in einem   in (lifferenten,   flüssigen Vehikel, bis der Zinkstaub verschwunden und eine Paste entstanden ist (wozu 
 EMI1.1 
 (worin R =   H   oder einwertiges Radikal)   z.     B.   



    (H0) CH. 5'O. ZH (OH).   



   Verdoppelt man gemäss dem ersten Zusatzpatent Nr. 39289 die Aldehydmenge 
 EMI1.2 
 



   Das so erhaltene leicht losliche Produkt wirkt nur halb so stark reduzierend. wie das nach dem Beispiel des Stammpatentes erhaltene, schwer losliche. Man bestimmt diese 
 EMI1.3 
 
 EMI1.4 
 verwendet. Dieses Verfahren hat vor dem einfachen Zusammenmischen der nach dem   Stamm-     und ersten Zusatzpatent erhaltenen Produkte den grossen technischen Vorteil, dass das Produkt in einer einzigen Operation statt in zwei getrennten Fabrikationen hergestellt   wird, dass ferner   die Operation des Mischens   ganz fortfällt, und dass das erhaltene   Produkt   einheitlicher ist als das durch blosses Mischen der in zwei verschiedenen   Fabrikationen   hergestellten Produkten erhaltene.

   
 EMI1.5 
 lassen sich in derselben Weise die   tlydrosultitverbindungen   andrer Aldehyde darstellen. *) Erstes   Zusatz-Pateilt Nr.   

 <Desc/Clms Page number 2> 

 
 EMI2.1 
 tionsprodukt wird entweder direkt als Zinksalz verwendet oder durch das Umsetzen mit Soda in das Natriumsalz umgewandelt, welches durch Eindampfen im Vakuum fest erhalten wird. 1 dieses Natriumsalzes reduziert 1,1 bis 1, 2 Indigo. 



   Beispiel 2 : In ein Gemisch von   65 kl   Zinkstaub und   330   Azetaldehyd von 20 Prozent werden unter gutem Rühren 100 kg schweflige Säure eingeleitet. Das Reaktionsprodukt stellt einen   grauweissen   Brei dar. Zur Verarbeitung auf das Natronsalz wird dieser mit Soda bis zum Beginn der alkalischen Reaktion angerührt, abgesaugt und das Filtrat im. Vakuum eingedampft. Das so gewonnene Natronsalz ist ein weisser, sehr hygroskopischer Körper, der schwer ganz trocken zu erhalten ist und   Indigosulfosäure   leicht reduziert.



   <Desc / Clms Page number 1>
 



  Process for the preparation of durable double compounds of aldehydes with reduction products of sulphurous acid.



   According to the parent patent No. 37921, adding sulfuric acid to a mixture of equal equivalents of zinc dust and aldehyde in a differentiated, liquid vehicle, until the zinc dust has disappeared and a paste has formed (for which
 EMI1.1
 (where R = H or monovalent radical) e.g. B.



    (H0) CH. 5'O. ZH (OH).



   According to the first additional patent no. 39289, the amount of aldehyde is doubled
 EMI1.2
 



   The easily soluble product obtained in this way has only half the reducing effect. like the one obtained according to the example of the parent patent, which is difficult to dissolve. You determine this
 EMI1.3
 
 EMI1.4
 used. Before the simple mixing together of the products obtained according to the parent patent and the first additional patent, this process has the great technical advantage that the product is manufactured in a single operation instead of in two separate fabrications, that the mixing operation is completely eliminated and that the obtained Product is more uniform than that obtained by simply mixing the products made in two different factories.

   
 EMI1.5
 the tlydrosultite compounds of other aldehydes can be prepared in the same way. *) First additional patent no.

 <Desc / Clms Page number 2>

 
 EMI2.1
 tion product is either used directly as the zinc salt or converted into the sodium salt by reaction with soda, which is obtained as a solid by evaporation in vacuo. 1 of this sodium salt reduces 1.1 to 1.2 indigo.



   Example 2: 100 kg of sulfurous acid are introduced into a mixture of 65 kl zinc dust and 330 acetaldehyde of 20 percent with thorough stirring. The reaction product is a gray-white paste. For processing on the sodium salt, this is mixed with soda until the alkaline reaction begins, filtered off and the filtrate im. Evaporated in vacuo. The sodium salt obtained in this way is a white, very hygroscopic body, which is difficult to keep completely dry and which slightly reduces indigo sulfonic acid.

 

Claims (1)

PATENT-ANSPRUCH : Abänderung der durch die Patente Nr. 37921 und Nr. 3928H geschützten Verfahren zur Darstellung haltbarer Doppelverbindungen von Aldehyden mit Rf' (ll1ktions- produkten der schwefligen Säure, dadurch gekennzeichnet, dass man bei gleichbleibender Zmkstaubmssnge die untereinander äquivalent zu haltenden Mengen Aldehyd und schweflige EMI2.2 PATENT CLAIM: Modification of the process protected by patents No. 37921 and No. 3928H for the preparation of durable double compounds of aldehydes with Rf '(products of sulphurous acid, characterized in that the amounts of aldehyde and sulphurous acid, which are to be kept equivalent to one another, are kept equivalent while the amount of dust remains constant EMI2.2
AT39290D 1905-03-17 1908-10-24 Process for the preparation of durable double compounds of aldehydes with reduction products of sulphurous acid. AT39290B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1905202826D DE202826C (en) 1905-03-17

Publications (1)

Publication Number Publication Date
AT39290B true AT39290B (en) 1909-10-11

Family

ID=5773435

Family Applications (1)

Application Number Title Priority Date Filing Date
AT39290D AT39290B (en) 1905-03-17 1908-10-24 Process for the preparation of durable double compounds of aldehydes with reduction products of sulphurous acid.

Country Status (1)

Country Link
AT (1) AT39290B (en)

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