AT115230B - Process for the preparation of the disodium salts of 4-iminomethylenesulfonic acid-2-metal-mercaptobenzene-1-sulfonic acids. - Google Patents

Process for the preparation of the disodium salts of 4-iminomethylenesulfonic acid-2-metal-mercaptobenzene-1-sulfonic acids.

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Publication number
AT115230B
AT115230B AT115230DA AT115230B AT 115230 B AT115230 B AT 115230B AT 115230D A AT115230D A AT 115230DA AT 115230 B AT115230 B AT 115230B
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Austria
Prior art keywords
acid
metal
mercaptobenzene
sulfonic acids
iminomethylenesulfonic
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German (de)
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Schering Kahlbaum Ag
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Publication of AT115230B publication Critical patent/AT115230B/en

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Description

  

   <Desc/Clms Page number 1> 
 
 EMI1.1 
 



    Es ist bekannt, dass 4-Amino-2-auromercaptobenzol-1-carbonsäure durch Formaldehydalkalibisulfit in die entsprechende Iminomethylenschwefligsäure-Verbindung (s. deutsche Patentschrift Nr. 429. 150) und die entsprechende \rgentomercaptoverbindung durch formaldehydsu1foxylsaurfs Natrium   
 EMI1.2 
 werden können. Dagegen sind die Iminomethylenschwefligsäure-Verbindungen der 4-Amino-2-metall-   mercaptobenzol-1-su1fosäuren   noch nicht hergestellt worden. 



   Die Dinatriumsalze der 4-Iminomethylenschwefligsäure-2-metallmercaptobenzol-1-sulfosäuren (4-Sulfomethylamino-2-metallmereaptobenzol-1-sulfosäuren) können in der Weise erhalten werden, dass man   formaldehydschwefligsaures   Natrium auf Natriumsalze der 4-Amino-2-metallmercaptobenzol-1-sulfosäuren einwirken lässt. 



   Die so entstehenden Verbindungen zeichnen sich vor denen der Carbonsäuren durch   Pngiftigkeit   und fast unbegrenzte Haltbarkeit ihrer wässrigen Lösungen an-. 



   Beispiel   1 : Man löst 42'3   Teile 4-amino-2-auromercaptobenzol-1-sulfosaures Natrium in 200 Teilen Wasser, fügt 13 Teile formaldehydschwefligsaures Natrium zu und erhitzt die Lösung unter Rühren zum Sieden. Man lässt erkalten und fällt die gebildete Formaldehydbisulfitverbindung mit Alkohol. Die Verbindung ist hellgelb, in Wasser leicht loslich und hat einen Goldgehalt von   36%.   



   Beispiel   2 : 33'4   Teile 4-amino-2-argentomercaptobenzol-1-sulfosaures Natrium werden in   150   Teilen Wasser gelöst, 14 Teile formalde hydschwefligsaures Natrium hinzugefügt und die Lösung unter Riihren zum Sieden erhitzt. Nach dem Erkalten wird die gebildete Formaldehydbisulfitverbindung mit Alkohol gefällt. 



   Das Dinatriumsalz der 4-Iminomethylenschwefligsäure-2-argentomereaptobenzol-1-sulfosäure ist ein lichtgelbes, in Wasser sehr leicht lösliches Pulver mit einem Silbergehalt von 24%. 



   Beispiel 3 : Man löst   29'5   teile 4-amino-2-bismutomereaptobenzol-1-sulfosaures Natrium in laO Teilen Wasser, fügt 14 Teile formaldehydsehwefligsaures Natrium hinzu und erhitzt zum Sieden. Die klare, rotbraune Lösung wird nach dem Erkalten mit Alkohol gefällt und so das Kondensationsprodukt als leicht wasserlösliches, orangegelbes Pulver mit einem Wismutgehalt von   16'5% erhalten.   

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



   <Desc / Clms Page number 1>
 
 EMI1.1
 



    It is known that 4-amino-2-auromercaptobenzene-1-carboxylic acid is converted by formaldehyde-alkali bisulfite into the corresponding iminomethylene sulfurous acid compound (see German patent specification No. 429.150) and the corresponding \ rgentomercapto compound by formaldehyde-sulfoxylic acid sodium
 EMI1.2
 can be. In contrast, the iminomethylenesulfurous acid compounds of 4-amino-2-metal-mercaptobenzene-1-su1fo acids have not yet been prepared.



   The disodium salts of 4-iminomethylene-sulphurous acid-2-metal-mercaptobenzene-1-sulphonic acids (4-sulphomethylamino-2-metal-mereaptobenzene-1-sulphonic acids) can be obtained in such a way that sodium formaldehyde-sulphurous acid is converted to sodium salts of 4-amino-2-metal mercaptobenzene-1 -sulfonic acids to act.



   The compounds formed in this way are distinguished from those of the carboxylic acids by their non-toxic properties and the almost unlimited shelf life of their aqueous solutions.



   Example 1: 42'3 parts of 4-amino-2-auromercaptobenzene-1-sulfonic acid sodium are dissolved in 200 parts of water, 13 parts of sodium formaldehyde-sulfuric acid are added and the solution is heated to the boil with stirring. It is allowed to cool and the formaldehyde bisulfite compound formed is precipitated with alcohol. The compound is light yellow, easily soluble in water and has a gold content of 36%.



   EXAMPLE 2 33'4 parts of 4-amino-2-argentomercaptobenzene-1-sulfonic acid sodium are dissolved in 150 parts of water, 14 parts of formaldehyde hydrosulfuric acid sodium are added and the solution is heated to the boil while stirring. After cooling, the formaldehyde bisulfite compound formed is precipitated with alcohol.



   The disodium salt of 4-iminomethylenesulfuric acid-2-argentomereaptobenzene-1-sulfonic acid is a light yellow powder which is very easily soluble in water and has a silver content of 24%.



   EXAMPLE 3: 29,5 parts of 4-amino-2-bismutomereaptobenzene-1-sulphonic acid are dissolved in 100 parts of water, 14 parts of sodium formaldehyde-sulphurous acid are added and the mixture is heated to the boil. After cooling, the clear, red-brown solution is precipitated with alcohol and the condensation product is thus obtained as a readily water-soluble, orange-yellow powder with a bismuth content of 16.5%.

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

Claims (1)

PATENT-ANSPRUCH : EMI1.3 mereaptobenzol-1-sulfosäuren, dadurch gekennzeichnet, dass man formaldehydschwefligsaures Natrium auf Natriumsalze der 4-Amino-2-metallmercaptobenzol-1-sulfosäure einwirken lässt. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: EMI1.3 mereaptobenzene-1-sulfonic acids, characterized in that sodium formaldehyde-sulfuric acid is allowed to act on sodium salts of 4-amino-2-metal mercaptobenzene-1-sulfonic acid. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT115230D 1926-11-20 1926-11-20 Process for the preparation of the disodium salts of 4-iminomethylenesulfonic acid-2-metal-mercaptobenzene-1-sulfonic acids. AT115230B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT115230T 1926-11-20

Publications (1)

Publication Number Publication Date
AT115230B true AT115230B (en) 1929-12-10

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Application Number Title Priority Date Filing Date
AT115230D AT115230B (en) 1926-11-20 1926-11-20 Process for the preparation of the disodium salts of 4-iminomethylenesulfonic acid-2-metal-mercaptobenzene-1-sulfonic acids.

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