CH139807A - Process for the preparation of 4-chloro-1-aminoanthraquinone-2-sulfonic acid. - Google Patents

Process for the preparation of 4-chloro-1-aminoanthraquinone-2-sulfonic acid.

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Publication number
CH139807A
CH139807A CH139807DA CH139807A CH 139807 A CH139807 A CH 139807A CH 139807D A CH139807D A CH 139807DA CH 139807 A CH139807 A CH 139807A
Authority
CH
Switzerland
Prior art keywords
chloro
aminoanthraquinone
sulfonic acid
preparation
sodium salt
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 CH139807A publication Critical patent/CH139807A/en

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Description

  

  Verfahren zur Darstellung von     4-Chlor-l-aminoanthrachinon-2-sulfosäure.       Es wurde gefunden, dass man die für die  Technik wichtige     4-Chlor-l-aminoanthrachi-          non-2-sulfosäure    in technisch einwandfreier  Weise darstellen kann, wenn man zu einer  Lösung der     1-Aminoanthrachinon-2-sulfosäure     ein     Alkalisalz    zusetzt und in das Gemisch  unter Kühlung Chlor einleitet. Das Ergebnis  dieser Reaktion war deshalb überraschend,  weil bekanntlich freies Chlor im     Anthrachi-          non    stehende     Aminogruppen    stark angreift,  so dass letztere sogar ganz eliminiert werden  können.

   Die     4-Chlor-l-aminoanthrachinon-2-          sulfosäure    soll als Zwischenprodukt für die  Herstellung von     Farbstoffen    Verwendung  finden.  



  Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Darstellung des     Natrium-          Salzes    von     4-Chlor-l-aminoanthrachinon-2-sul-          fosäure,    das dadurch gekennzeichnet ist, dass  man zu einer Lösung von     1-Aminoanthrachi-          non-2-sulfosäure    Kochsalz zusetzt und in das    Gemisch unter Kühlung Chlor einleitet. Das       Natriumsalz    der     4-Chlor-l-aniinoanthrachinon-          2-sulfosäure    bildet feine     Kriställehen.     



       Beispiel:     Zu einer Lösung von 82 Gewichtsteilen       1-Amino-2-anthrachinonsulfosäure    in 1100       Teilen        Wasser        fügt        man        10        %        Kochsalz.        Es     entsteht eine feine Suspension des Natrium  salzes des     1-Amino-anthrachinon-2-sulfosäure,     in die man unter starker Kühlung Chlor ein  leitet, bis sich das Na-Salz der Aminosäure  in das der Chloraminosäure verwandelt  hat.

   Der Vorgang lässt sich     mikrosko-          piseh    sehr gut verfolgen, da das Ausgangs  material und das Endprodukt voneinander  verschiedene Kristallformen zeigen. Die Spiesse  des Na-Salzes der     1-Aminoanthrachinon-2-          sulfosäure    wandeln sich in die viel feiner  verteilten     Kriställchen    des Na-Salzes der       Chloramiriosulfosäure    um.



  Process for the preparation of 4-chloro-1-aminoanthraquinone-2-sulfonic acid. It has been found that the 4-chloro-l-aminoanthraquinone-2-sulfonic acid, which is important for technology, can be produced in a technically flawless manner if an alkali salt is added to a solution of the 1-aminoanthraquinone-2-sulfonic acid and in the Introduces mixture with cooling chlorine. The result of this reaction was surprising because it is known that free chlorine strongly attacks amino groups in the anthraquinone, so that the latter can even be eliminated completely.

   The 4-chloro-1-aminoanthraquinone-2-sulfonic acid is said to be used as an intermediate for the production of dyes.



  The subject of the present patent is a process for the preparation of the sodium salt of 4-chloro-1-aminoanthraquinone-2-sulphonic acid, which is characterized in that common salt is added to a solution of 1-aminoanthraquinone-2-sulphonic acid and introducing chlorine into the mixture with cooling. The sodium salt of 4-chloro-1-aniinoanthraquinone-2-sulfonic acid forms fine crystals.



       Example: 10% sodium chloride is added to a solution of 82 parts by weight of 1-amino-2-anthraquinonesulfonic acid in 1100 parts of water. The result is a fine suspension of the sodium salt of 1-amino-anthraquinone-2-sulfonic acid, into which chlorine is passed under strong cooling until the sodium salt of the amino acid has been transformed into that of the chloramino acid.

   The process can be followed very well under the microscope, as the starting material and the end product show different crystal forms. The skewers of the sodium salt of 1-aminoanthraquinone-2-sulfonic acid are transformed into the much more finely divided crystals of the sodium salt of chloramiriosulfonic acid.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung des Natrium salzes von 4-Chlor--1-amirroarrthrachinon-2-sul- fosäure, dadurch gekenzeichnet, dass man zu einer Lösung von 7-Amirroanthrachirrorr-2-sul- fosäure Kochsalz zusetzt und in das Gemisch unter Kühlen Chlor einleitet. Das Natrium salz der 4-Chlor-l-aminoanthr-achirron-2-sulfo- säure bildet feine Kriställchen. PATENT CLAIM: Process for the preparation of the sodium salt of 4-chloro-1-amirroarrthraquinone-2-sulphonic acid, characterized in that common salt is added to a solution of 7-amirroanthrachirror-2-sulphonic acid and added to the mixture with cooling Introduces chlorine. The sodium salt of 4-chloro-1-aminoanthr-achirronic-2-sulfonic acid forms fine crystals.
CH139807D 1927-12-08 1928-11-30 Process for the preparation of 4-chloro-1-aminoanthraquinone-2-sulfonic acid. CH139807A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE139807X 1927-12-08

Publications (1)

Publication Number Publication Date
CH139807A true CH139807A (en) 1930-05-15

Family

ID=5667918

Family Applications (1)

Application Number Title Priority Date Filing Date
CH139807D CH139807A (en) 1927-12-08 1928-11-30 Process for the preparation of 4-chloro-1-aminoanthraquinone-2-sulfonic acid.

Country Status (1)

Country Link
CH (1) CH139807A (en)

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