CH83508A - Process for preparing picric acid by nitration of dinitrophenols - Google Patents

Process for preparing picric acid by nitration of dinitrophenols

Info

Publication number
CH83508A
CH83508A CH83508A CH83508DA CH83508A CH 83508 A CH83508 A CH 83508A CH 83508 A CH83508 A CH 83508A CH 83508D A CH83508D A CH 83508DA CH 83508 A CH83508 A CH 83508A
Authority
CH
Switzerland
Prior art keywords
dinitrophenols
preparing
nitration
picric acid
acid
Prior art date
Application number
CH83508A
Other languages
French (fr)
Inventor
Bouchardy Ferdinand Gros
Original Assignee
Ferdinand Gros & Bouchardy
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 Ferdinand Gros & Bouchardy filed Critical Ferdinand Gros & Bouchardy
Publication of CH83508A publication Critical patent/CH83508A/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C201/00Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
    • C07C201/06Preparation of nitro compounds
    • C07C201/14Preparation of nitro compounds by formation of nitro groups together with reactions not involving the formation of nitro groups

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Procédé de préparation     d'acide    picrique par nitration des     dinitrophénols.       La présente     invention    repose sur l'obser  vation que l'on peut transformer les deux       dinitrophénols    1, 2, 4 et 1, 2, 6 en acide  picrique sans emploi d'acide sulfurique, lors  qu'on soumet ces deux dérivés, ensemble ou  séparément, à l'action de l'acide nitrique con  centré saturé d'anhydride nitrique     Nz        0,.     



  Ceci peut être exécuté, par exemple, comme  suit  Le mélange des deux     dinitrophénols    1, 2,  4 et 1, 2. 6 est tais en réaction avec de       l'acide'        nitrique        concentré        contenant        30%        de          N=        Os        et        70%        de        N0aH        concentré;

          le        mé-          lange    en réaction est d'abord maintenu à  basse température, sans dépasser 350 à 400;  puis on chauffe (sans dépasser 1000), jusqu'à  ce que la réaction soit terminée.    8,2 parties d'un mélange des deux     dini-          trophénols    traitées avec 14 parties du mé  lange d'acide nitrique     concentré    et de N2 05  ci-dessus spécifié, ont donné, après séparation  des produits de la réaction par de l'eau, 7, 7  parties d'acide picrique pur.  



       An    lieu du mélange des deux     dinitrophé-          nols,    on peut employer l'un d'eux seul.



  Process for preparing picric acid by nitration of dinitrophenols. The present invention is based on the observation that the two dinitrophenols 1, 2, 4 and 1, 2, 6 can be transformed into picric acid without the use of sulfuric acid, when these two derivatives are subjected together or separately, to the action of concentrated nitric acid saturated with nitric anhydride Nz 0 ,.



  This can be carried out, for example, as follows. The mixture of the two dinitrophenols 1, 2, 4 and 1, 2. 6 is left to react with concentrated nitric acid containing 30% N = Os and 70% N0aH concentrated;

          the reaction mixture is first kept at low temperature, without exceeding 350 to 400; then heating (without exceeding 1000), until the reaction is complete. 8.2 parts of a mixture of the two dinitrophenols treated with 14 parts of the mixture of concentrated nitric acid and N205 specified above gave, after separation of the reaction products with water, 7, 7 parts of pure picric acid.



       Instead of mixing the two dinitrophenols, one can be used alone.

 

Claims (1)

REVENDICATION Procédé de préparation d'acide picrique, suivant lequel on traite l'un au moins des dinitrophénols 1, 2, 4 et 1, 2, 6, sans emploi d'acide sulfurique; par un mélange d'acide nitrique concentré saturé d'anhydride nitrique N2 05. CLAIM Process for preparing picric acid, according to which at least one of dinitrophenols 1, 2, 4 and 1, 2, 6 is treated without the use of sulfuric acid; with a mixture of concentrated nitric acid saturated with nitric anhydride N2 05.
CH83508A 1919-03-22 1919-03-22 Process for preparing picric acid by nitration of dinitrophenols CH83508A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH83508T 1919-03-22

Publications (1)

Publication Number Publication Date
CH83508A true CH83508A (en) 1920-05-01

Family

ID=4338984

Family Applications (1)

Application Number Title Priority Date Filing Date
CH83508A CH83508A (en) 1919-03-22 1919-03-22 Process for preparing picric acid by nitration of dinitrophenols

Country Status (1)

Country Link
CH (1) CH83508A (en)

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