CH84449A - Manufacturing process of an azophosphate fertilizer - Google Patents

Manufacturing process of an azophosphate fertilizer

Info

Publication number
CH84449A
CH84449A CH84449A CH84449DA CH84449A CH 84449 A CH84449 A CH 84449A CH 84449 A CH84449 A CH 84449A CH 84449D A CH84449D A CH 84449DA CH 84449 A CH84449 A CH 84449A
Authority
CH
Switzerland
Prior art keywords
fertilizer
azophosphate
manufacturing process
acidity
nitrophosphate
Prior art date
Application number
CH84449A
Other languages
French (fr)
Inventor
Auguste Guye Philippe
Original Assignee
Auguste Guye Philippe
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 Auguste Guye Philippe filed Critical Auguste Guye Philippe
Publication of CH84449A publication Critical patent/CH84449A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B11/00—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes
    • C05B11/04—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid
    • C05B11/06—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using nitric acid (nitrophosphates)

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Fertilizers (AREA)

Description

  

  Procédé  < le fabrication d'an engrais     azophosphaté.       On a déjà décrit la préparation d'un  engrais     azophosphaté    obtenu en traitant le  phosphate tricalcique     (phosphorite,    scories  Thomas) soit avec l'acide nitrique aqueux,  soit avec les gaz humides contenant des  vapeurs nitreuses; cet engrais a été désigné  sous le nom de     nitrophosphate.     



  Le produit ainsi obtenu, dans lequel l'acide  phosphorique est solubilisé de la     même    manière  que dans les superphosphates, présente, comme  ces     derniers,    le     -phénomène    de la rétrograda  tion, qui se traduit, dans ce cas, par 1a mise  en liberté d'une partie de l'acide nitrique ;  celle-ci est accompagnée d'un faible dégage  ment de vapeurs nitreuses, qui     constitue        â     la longue une perte en azote.    Le procédé qui fait l'objet de la présente  invention a     pour    but de remédier à cet in  convénient.

   II consiste à     traiter    le     nitrophos-          phate    par de l'ammoniaque sèche     jusqu'à     neutralisation de toute l'acidité; dans ce but,  il est bon que le     nitrophospliate    soit pul  vérisé ou granulé de façon à     offrir    le meilleur  contact aux gaz.



  Process <the manufacture of an azophosphate fertilizer. The preparation of an azophosphate fertilizer has already been described, obtained by treating tricalcium phosphate (phosphorite, Thomas slag) either with aqueous nitric acid or with wet gases containing nitrous vapors; this fertilizer has been referred to as nitrophosphate.



  The product thus obtained, in which the phosphoric acid is dissolved in the same way as in the superphosphates, exhibits, like the latter, the phenomenon of retrogradation, which in this case results in the release of 'part of nitric acid; this is accompanied by a weak evolution of nitrous vapors, which in the long run constitutes a loss of nitrogen. The object of the method which is the subject of the present invention aims to remedy this disadvantage.

   It consists in treating the nitrophosphate with dry ammonia until neutralization of all the acidity; for this purpose, it is good for the nitrophosplate to be pulverized or granulated so as to offer the best contact to the gases.

Claims (1)

REVENDICATION Procédé de préparation d'un engrais azo- phospliaté, consistant à neutraliser l'acidité du nitrophospbate de calcium par de l'am moniaque sèche. CLAIM Process for preparing an azophospliaté fertilizer, consisting in neutralizing the acidity of calcium nitrophospbate with dry ammonia.
CH84449A 1919-06-12 1919-06-12 Manufacturing process of an azophosphate fertilizer CH84449A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH84449T 1919-06-12

Publications (1)

Publication Number Publication Date
CH84449A true CH84449A (en) 1920-07-16

Family

ID=4340450

Family Applications (1)

Application Number Title Priority Date Filing Date
CH84449A CH84449A (en) 1919-06-12 1919-06-12 Manufacturing process of an azophosphate fertilizer

Country Status (1)

Country Link
CH (1) CH84449A (en)

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