CH159322A - A process for the manufacture of 3: 3'-dichlorotetrahydrodianthraquinone-1: 2: 2 'tetrasulfuric ester: 1'-dihydroazine. - Google Patents

A process for the manufacture of 3: 3'-dichlorotetrahydrodianthraquinone-1: 2: 2 'tetrasulfuric ester: 1'-dihydroazine.

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Publication number
CH159322A
CH159322A CH159322DA CH159322A CH 159322 A CH159322 A CH 159322A CH 159322D A CH159322D A CH 159322DA CH 159322 A CH159322 A CH 159322A
Authority
CH
Switzerland
Prior art keywords
tetrasulfuric
ester
dihydroazine
manufacture
esters
Prior art date
Application number
Other languages
French (fr)
Inventor
Limited Imperial Ch Industries
Original Assignee
Ici Ltd
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 Ici Ltd filed Critical Ici Ltd
Publication of CH159322A publication Critical patent/CH159322A/en

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Description

  

  Procédé de fabrication de l'ester     tétrasulfurique    de la     3:3'-dichlorotétrahydro-          dianthraquinone-1:    2 : 2':     1'-dihydroazine.       On sait déjà fabriquer et appliquer des  esters sulfuriques des     indanthrones    réduites,  esters que l'on croit être les esters     tétrasulfu-          riques    des     tétrahydrodianthraquinone-l    :2  2' :     l'-azines        (dianthrahydroquinone-1    : 2  2' :     l'-azines).     



  On a constaté, selon l'invention, que ces  esters     tétrasulfuriques    des     tétrahydrodian-          thraquinoneazines    peuvent être     convertis    en  de nouveaux esters qui semblent être les es  ters     tétrasulfuriques    des     tétrahydrodianthra-          quinonedihydroazines.    On a également cons  taté que des esters     tétrasulfuriques    peuvent  être transformés en encore d'autres     nouveaux     esters qui semblent être des esters     trisulfu-          riques    et que ces esters     trisulfuriques    peu  vent 

  être convertis en de     nouveaux    esters di  sulfuriques.  



  La présente invention est relative à la  conversion de l'ester     tétrasulfurique    de la  3 :     3'-dichlorotétrahydrodianthraquinone-1       2     :92'    :     l'-azine    par réduction en l'ester     tétra-          sulfurique    de la     3:3'-dichlorotétra.hydro-          dianthraquinone-1    : 2 : 2' :     l'-dihydroazine     (3 :     3'-dichlorodianthrahydroquinone-1    : 2  2' :     l'-dihydroazine.     



  L'exemple suivant dans lequel les parties  sont en poids explique l'invention sans la li  miter.    <I>Exemple:</I>  10 parties du sel de     potassium    de l'ester       tétrasulfurique    de la. 3     :3'-dichlorotétra.hy-          drodianthraquinonea.zine    en solution dans 50  parties d'eau sont traitées par 24,5 parties  de soude caustique à     20%    et 5 parties     d'hy-          drosulfite    de sodium     (892%).    La liqueur est  agitée à 40   C pendant 15 minutes et l'on  ajoute alors 20 parties de chlorure de potas  sium.

   Après refroidissement à 5  . la masse  vert foncé est filtrée et lavée sur le filtre  avec du chlorure de     potassium    saturé conte-           riant    du gaz carbonique et rendu légèrement.  alcalin au moyen de     carbonate.  



  A process for the manufacture of 3: 3'-dichlorotetrahydro-dianthraquinone-1: 2: 2 ': 1'-dihydroazine tetrasulfuric ester. It is already known how to make and apply sulfuric esters of reduced indanthrones, esters believed to be the tetrasulfuric esters of tetrahydrodianthraquinone-1: 2 2 ': l'-azines (dianthrahydroquinone-1: 2 2': l'- azines).



  It has been found, according to the invention, that these tetrasulfuric esters of tetrahydrodianthraquinoneazines can be converted into new esters which appear to be the tetrasulfuric esters of tetrahydrodianthraquinonedihydroazines. It has also been found that tetrasulfuric esters can be converted to yet other new esters which appear to be trisulfuric esters and that these trisulfuric esters can be converted

  be converted into new sulfuric esters.



  The present invention relates to the conversion of the tetrasulfuric ester of 3: 3'-dichlorotetrahydrodianthraquinone-1 2: 92 ': l'-azine by reduction to the tetrasulfuric ester of 3: 3'-dichlorotetra. hydro-dianthraquinone-1: 2: 2 ': l'-dihydroazine (3: 3'-dichlorodianthrahydroquinone-1: 2 2': l'-dihydroazine.



  The following example in which parts are by weight explains the invention without limiting it. <I> Example: </I> 10 parts of the potassium salt of the tetrasulfuric ester of the. 3: 3'-dichlorotétra.hy- drodianthraquinonea.zine dissolved in 50 parts of water are treated with 24.5 parts of 20% caustic soda and 5 parts of sodium hydrosulphite (892%). The liquor is stirred at 40 C for 15 minutes and then 20 parts of potassium chloride are added.

   After cooling to 5. the dark green mass is filtered and washed on the filter with saturated potassium chloride containing carbon dioxide and made lightly. alkaline by means of carbonate.

Claims (1)

REVENDICATION Procédé de fabrication de l'ester tétrasul- furique de la 3 :3'-dichlorotétrahydrodian- thraquinone-1 : 2 :2' : l'-dihydroazine (3 : 3'- dichlorodianthrahydroquinone-1 : 2 : 2' : l' dihydroazine), selon lequel on soumet l'ester tétrasulfurique de la 3 :3'-dichlorotétrahy- drodianthraquinone-1 : 2 : 2' : l'-azine â. une réduction. CLAIM Process for the manufacture of tetrasulfuric ester of 3: 3'-dichlorotetrahydrodian-thraquinone-1: 2: 2 ': l'-dihydroazine (3: 3'- dichlorodianthrahydroquinone-1: 2: 2': l ' dihydroazine), according to which the tetrasulfuric ester of 3: 3'-dichlorotetrahy-drodianthraquinone-1: 2: 2 ': 1'-azine â is subjected. a discount. L'ester tétrasulfurique de 3 : 3-dichloro- tétrahydrodianthraquinone-1 : 2 : 2' : l'-dihy- droazine est un corps qui se dissout dans l'eau en donnant une solution brun foncé, qui s'oxyde rapidement. au contact de l'air pour donner ce qui semble être l'azine, et qui, avec les acides, donne une solution vert brillant qui tourne graduellement au bleu-violet lors qu'on la, laisse au repos. SOUS-REVENDICATION Procédé suivant la revendication, dans le quel l'agent réducteur est un hydrosulfite al calin. 3: 3-Dichloro-tetrahydrodianthraquinone-1: 2: 2 'tetrasulfuric ester: 1'-dihydroazine is a substance which dissolves in water giving a dark brown solution, which oxidizes rapidly. on contact with air to give what appears to be azine, and which together with acids gives a brilliant green solution which gradually turns blue-violet when left to stand. SUBCLAIM A method as claimed in claim in which the reducing agent is an alkaline hydrosulfite.
CH159322D 1930-06-13 1931-06-13 A process for the manufacture of 3: 3'-dichlorotetrahydrodianthraquinone-1: 2: 2 'tetrasulfuric ester: 1'-dihydroazine. CH159322A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB159322X 1930-06-13
GB100231X 1931-02-10
CH157667T 1931-06-13

Publications (1)

Publication Number Publication Date
CH159322A true CH159322A (en) 1932-12-31

Family

ID=27177396

Family Applications (1)

Application Number Title Priority Date Filing Date
CH159322D CH159322A (en) 1930-06-13 1931-06-13 A process for the manufacture of 3: 3'-dichlorotetrahydrodianthraquinone-1: 2: 2 'tetrasulfuric ester: 1'-dihydroazine.

Country Status (1)

Country Link
CH (1) CH159322A (en)

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