CH139078A - Process for the preparation of 4-methylamino-1-oxybenzenesulfate. - Google Patents

Process for the preparation of 4-methylamino-1-oxybenzenesulfate.

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Publication number
CH139078A
CH139078A CH139078DA CH139078A CH 139078 A CH139078 A CH 139078A CH 139078D A CH139078D A CH 139078DA CH 139078 A CH139078 A CH 139078A
Authority
CH
Switzerland
Prior art keywords
methylamino
preparation
oxybenzenesulfate
sulfuric acid
sulfate
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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
Application filed by Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH139078A publication Critical patent/CH139078A/en

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

Description

  

  Verfahren zur Darstellung von     4-llethylamino-l-ogybenzolsulfat.       Gegenstand des Patentes ist ein Ver  fahren zur Darstellung von     4-Methylamino-          1-oxybenzolsulfat    durch Behandeln von einem       4-Methylarnino-l-alkoxybenzol    mit Schwefel  säure. Die bekannte Verbindung findet als       Entwicklersubstanz    in der Photographie     Ver=          dung.     



       Beispiel:     151 Teile     4-Methylamino-l-äthoxybenzol     werden in 420 Teile Schwefelsäure von 70      /o     eingetragen und die     blasse    in einem auf etwa  160   C erhitzten Ölbade einige     Stunden    am       Rückflusskühler    gerührt. Hierauf giesst man  in Wasser und versetzt die wässerige Lösung  mit     Calciumkarbonat    bis zur kongoneutralen  Reaktion.

   Nach Trennung vom ausgeschie-    denen     Calciumsulfat    wird das Filtrat, zweck  mässig im Vakuum, eingeengt, wobei sich  das Halbsulfat des     4-Monomethylaniino-l-          oxybenzols    in fast farblosen Kristallen ab  scheidet. Zur völligen Reinigung wird es aus  Wasser umgelöst und so in vollkommen farb  losen Kristallen erhalten.



  Process for the preparation of 4-llethylamino-1-ogybenzenesulfate. The subject of the patent is a process for the preparation of 4-methylamino-1-oxybenzenesulfate by treating a 4-methylamino-1-alkoxybenzene with sulfuric acid. The well-known compound is used as a developer in photography.



       Example: 151 parts of 4-methylamino-1-ethoxybenzene are introduced into 420 parts of 70 / o sulfuric acid and the pale oil is stirred for a few hours on a reflux condenser in an oil bath heated to about 160 ° C. It is then poured into water and calcium carbonate is added to the aqueous solution until the reaction is Congo-neutral.

   After separating the calcium sulfate which has separated out, the filtrate is concentrated, expediently in vacuo, the half-sulfate of 4-monomethylaniino-oxybenzene separating out in almost colorless crystals. For complete purification, it is dissolved from water and thus obtained in completely colorless crystals.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von 4-Methyl- amino-l-oxybenzolsulfat, dadurch gekenn zeichnet, dass man ein 4-Methylamino-l- alkoxybenzol mit Schwefelsäure behandelt. PATENT CLAIM: Process for the preparation of 4-methylamino-1-oxybenzene sulfate, characterized in that a 4-methylamino-1-alkoxybenzene is treated with sulfuric acid.
CH139078D 1927-07-12 1928-06-28 Process for the preparation of 4-methylamino-1-oxybenzenesulfate. CH139078A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE139078X 1927-07-12
CH137467T 1928-06-28

Publications (1)

Publication Number Publication Date
CH139078A true CH139078A (en) 1930-03-31

Family

ID=25712983

Family Applications (1)

Application Number Title Priority Date Filing Date
CH139078D CH139078A (en) 1927-07-12 1928-06-28 Process for the preparation of 4-methylamino-1-oxybenzenesulfate.

Country Status (1)

Country Link
CH (1) CH139078A (en)

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