CH157667A - Process for preparing tetrasulfuric ester of tetrahydrodianthraquinone-1: 2: 2 ': 1'-dihydroazine. - Google Patents

Process for preparing tetrasulfuric ester of tetrahydrodianthraquinone-1: 2: 2 ': 1'-dihydroazine.

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Publication number
CH157667A
CH157667A CH157667DA CH157667A CH 157667 A CH157667 A CH 157667A CH 157667D A CH157667D A CH 157667DA CH 157667 A CH157667 A CH 157667A
Authority
CH
Switzerland
Prior art keywords
ester
dihydroazine
tetrasulfuric
tetrahydrodianthraquinone
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 CH157667A publication Critical patent/CH157667A/en

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Description

  

      Proeédé    de préparation de l'ester     tétrasalfurique    de la     tétrahydrodiantlu-aquinone-          1   <B>:</B> 2: 2':     P-dibydroazine.       On sait<B>déjà</B> fabriquer -et appliquer des  esters sulfuriques des     inclanthranes    réduites,  esters que l'on croit être les esters     tétra-          sulfuriques    des     iétrahyclrodiantliraquinone-          1    2 2'<B>:</B>     l'-azines        (dianthrahydroquinon#e-          1    2 2'<B>:

  </B>     l'-azines).     



  On a constaté, selon l'invention, que ces  esters     tétrasulfuriques    des     tétrahydrodian-          thraquinoncazines    peuvent être convertis en  de nouveaux esters qui semblent être les  esters     tétrasulfuriques    des     tétrahydrodian-          thraquilionedillydroazines.    On a également,

    constaté que des esters     tétrasulfuriques    peu  vent être transformés en encore d'autres nou  veaux esters qui semblent être des esters     tri-          sulfuriques    et que ces esters     trisulfuriques     peuvent être convertis en de nouveaux esters       disulfuriques.     



  La présente invention est relative<B>à</B> la     con-          version    de l'ester     tétrasulfurique    de la tétra-         hydro#dianthraquinone-1    :2<B>:</B> 2'<B>:</B>     l'-azine    par  réduction en l'ester     tétrasulfurique    de la       tétrahydrodianthraquinone-1   <B>:</B> 2     :2'   <B>:</B>     l'-dihy-          droazine        (dianthrahydroquinone-1   <B>:</B> 2<B>:</B> 2'<B>:</B>     V-          dihydroazine).     



  L'exemple suivant dans lequel les parties  sont en poids explique l'invention sans la       iimiter.     



  <I>Exemple:</I>  <B>10</B> parties du sel de potassium de l'ester       t6trasulfurique    de la     tétrahydrodianthraqui-          none-1   <B>-</B> 2<B>:</B>     2'   <B>:</B>     l'-azine    en solution dans<B>50</B>  parties d'eau sont traitées avec 24,5 parties  de soude caustique<B>à</B> 20<B>%</B> et<B>5</B> parties     d'hy-          drosulfite    de sodium<B>(82%).</B> La liqueur est  agitée<B>à</B> 40<B>'</B> pendant<B>15</B> minutes et l'on  ajoute ensuite 20 parties de chlorure de po  tassium.

   Après refroidissement<B>à 5</B>     ',    la  masse vert foncé est filtrée et lavée sur le  filtre avec du chlorure de potassium satura      contenant du     caz    carbonique et rendu     légère-          n   <B>CI</B>  ment alcalin avec du carbonate.



      Process for preparing the tetrasalfuric ester of tetrahydrodiantlu-aquinone- 1 <B>: </B> 2: 2 ': P-dibydroazine. It is already known <B> </B> to manufacture and apply sulfuric esters of reduced inclanthranes, esters believed to be tetra-sulfuric esters of ietrahyclrodiantliraquinone- 1 2 2 '<B>: </B> l' -azines (dianthrahydroquinon # e- 1 2 2 '<B>:

  </B> l'-azines).



  It has been found, according to the invention, that these tetrasulfuric esters of tetrahydrodian-thraquinoncazines can be converted into new esters which appear to be the tetrasulfuric esters of tetrahydrodian-thraquilionedillydroazines. We also have,

    found that tetrasulfuric esters can be converted to yet other new esters which appear to be tri-sulfuric esters and that these trisulfuric esters can be converted to new disulfuric esters.



  The present invention relates to <B> to </B> the conversion of the tetrasulfuric ester of tetrahydro # dianthraquinone-1: 2 <B>: </B> 2 '<B>: </ B > l'-azine by reduction to the tetrasulfuric ester of tetrahydrodianthraquinone-1 <B>: </B> 2: 2 '<B>: </B> l'-dihydroazine (dianthrahydroquinone-1 <B> : </B> 2 <B>: </B> 2 '<B>: </B> V- dihydroazine).



  The following example in which parts are by weight explains the invention without limiting it.



  <I> Example: </I> <B> 10 </B> parts of the potassium salt of tetrahydrodianthraquinone-1 t6trasulfuric ester <B> - </B> 2 <B>: </ B > 2 '<B>: </B> the -azine in solution in <B> 50 </B> parts of water are treated with 24.5 parts of caustic soda <B> to </B> 20 < B>% </B> and <B> 5 </B> parts sodium hydrosulphite <B> (82%). </B> The liquor is stirred <B> to </B> 40 < B> '</B> for <B> 15 </B> minutes and then 20 parts of potassium chloride are added.

   After cooling to <B> to 5 </B> ', the dark green mass is filtered and washed on the filter with saturated potassium chloride containing carbon dioxide and made slightly alkaline <B> CI </B> with carbonate.

Claims (1)

]REVENDICATION: Procédé de fabrication de l'ester t6trasul- ùrique de la tétraliydrodianthraquinone- 1 <B>:</B> 2 -.2' <B>-</B> l-,dihydroazine (dianthrahydroqui- none-1 <B>:</B> 2<B>:</B> 2'<B>:</B> l-,dihydroazine), caractérisé par le fait que l'on soumet l'ester tétra- sulfurique de la tétrahydrodianthraquinoue- 1 :2 :2' <B>: ] CLAIM: Process for the manufacture of the t6trasul- ùric ester of tetralihydrodianthraquinone- 1 <B>: </B> 2 -.2 '<B> - </B> l-, dihydroazine (dianthrahydroquinone-1 < B>: </B> 2 <B>: </B> 2 '<B>: </B> l-, dihydroazine), characterized by the fact that the tetra-sulfuric ester of tetrahydrodianthraquinou is subjected - 1: 2: 2 '<B>: </B> l-azine à-une réduction. Le nou veau composé, l'ester têtrasulfurique de la tétrallydrodianthraquinon,e-1 <B>:</B> 2<B>:</B> 2'<B>:</B> l'-dihy- droazine, est, un corps qui se dissout dans l'eau en donnant une solution brun foncé s'uxydant 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 se transforme graduellement en rouge- violet en laissant le liquide au repos. </B> l-azine at-one reduction. The new compound, tetrallydrodianthraquinon tetrasulfuric ester, e-1 <B>: </B> 2 <B>: </B> 2 '<B>: </B> l'-dihy- droazine, is, a body which dissolves in water to give a dark brown solution which rapidly oxidizes on contact with air to give what appears to be azine and which together with acids gives a brilliant green solution which gradually turns red-violet leaving the liquid to stand. SOUS-REVENDICATI01NI <B>-</B> Procédé suivant la revendication, carac- t6ris6 par le fait que l'agent réducteur est un hydrosulfite alcalin. SUB-CLAIMATEMENT <B> - </B> A method according to claim, characterized in that the reducing agent is an alkali hydrosulphite.
CH157667D 1930-06-13 1931-06-13 Process for preparing tetrasulfuric ester of tetrahydrodianthraquinone-1: 2: 2 ': 1'-dihydroazine. CH157667A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB157667X 1930-06-13
GB100231X 1931-02-10

Publications (1)

Publication Number Publication Date
CH157667A true CH157667A (en) 1932-10-15

Family

ID=26247173

Family Applications (1)

Application Number Title Priority Date Filing Date
CH157667D CH157667A (en) 1930-06-13 1931-06-13 Process for preparing tetrasulfuric ester of tetrahydrodianthraquinone-1: 2: 2 ': 1'-dihydroazine.

Country Status (1)

Country Link
CH (1) CH157667A (en)

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