AT78987B - Process for the preparation of water-soluble condensation products. - Google Patents

Process for the preparation of water-soluble condensation products.

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Publication number
AT78987B
AT78987B AT78987DA AT78987B AT 78987 B AT78987 B AT 78987B AT 78987D A AT78987D A AT 78987DA AT 78987 B AT78987 B AT 78987B
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AT
Austria
Prior art keywords
water
condensation products
preparation
soluble condensation
soluble
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German (de)
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Oesterreichischer Ver Fuer Che
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Publication of AT78987B publication Critical patent/AT78987B/en

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Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Darstellung wasserlöslicher Kondensationsprodukte. 



   Es ist bekannt, dass sich naphtol mit Ameisensäure unter dem   Einfluss   von Salz. säure zu Kondensationsprodukten vereinigt (Zentrallblatt 1911, Seite 855). Das Produkt dieser Reaktion ist aber in Wasser nicht löslich. Man gelangt nun zu wasserlöslichen Kondensationsprodukten, wenn man als Kondensationsmittel konzentrierte Schwefelsäure verwendet und die Temperatur so wählt, dass gleichzeitig Sulfierung erfolgt. Im Gegensatz zu der Kondensation mit Salzsäure   titt   auf diese Weise auch das   ss-Naphtol   in Reaktion. 



   Beispiel : 
 EMI1.1 
 20 kg Schwefelsäure von 66  Bé angerührt und langsam bis auf 150 bis 1700 erhitzt. Die Schmelze aus der zuerst Kohlenoxyd entweicht, färbt sich dunkel und gibt mit Wasser eine rötliche Fällung. Nachdem die Schmelze vollkommen in Wasser löslich geworden ist. wird dieselbe mit Wasser versetzt. Das Produkt zeigt nach dem Abstumpfen der über-   schüssigen   Schwefelsäure starke Fällbarkeit mit   Leimlösung.   

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



   <Desc / Clms Page number 1>
 



  Process for the preparation of water-soluble condensation products.



   It is known that naphtol reacts with formic acid under the influence of salt. acid combined to form condensation products (Zentrallblatt 1911, page 855). However, the product of this reaction is not soluble in water. Water-soluble condensation products are now obtained if concentrated sulfuric acid is used as the condensation agent and the temperature is chosen so that sulphonation takes place at the same time. In contrast to the condensation with hydrochloric acid, the ß-naphtol also reacts in this way.



   Example:
 EMI1.1
 20 kg of sulfuric acid from 66 Bé and slowly heated to 150 to 1700. The melt, from which carbon oxide escapes first, turns dark and gives a reddish precipitate with water. After the melt has become completely soluble in water. water is added to the same. After the excess sulfuric acid has been blunted, the product shows strong precipitability with glue solution.

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

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Darstellung wasserlöslicher Kondensationsprodukte, dadurch gckpnc- zeichnet, dass man Naphtole mit Ameisensäure bei Gegenwart von konzentrierter Schweft'l- säure auf über 100 liegende Temperaturen erhitzt. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Process for the preparation of water-soluble condensation products, characterized in that naphthols are heated to temperatures above 100 with formic acid in the presence of concentrated sulfuric acid. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT78987D 1917-01-11 1917-01-11 Process for the preparation of water-soluble condensation products. AT78987B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT78987T 1917-01-11

Publications (1)

Publication Number Publication Date
AT78987B true AT78987B (en) 1919-11-10

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ID=3600526

Family Applications (1)

Application Number Title Priority Date Filing Date
AT78987D AT78987B (en) 1917-01-11 1917-01-11 Process for the preparation of water-soluble condensation products.

Country Status (1)

Country Link
AT (1) AT78987B (en)

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