CH97425A - Process for the manufacture of a mixed phospho-nitrogen fertilizer. - Google Patents
Process for the manufacture of a mixed phospho-nitrogen fertilizer.Info
- Publication number
- CH97425A CH97425A CH97425DA CH97425A CH 97425 A CH97425 A CH 97425A CH 97425D A CH97425D A CH 97425DA CH 97425 A CH97425 A CH 97425A
- Authority
- CH
- Switzerland
- Prior art keywords
- mixed
- cyanamide
- phospho
- manufacture
- phosphoric acid
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 7
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 239000000618 nitrogen fertilizer Substances 0.000 title claims description 4
- CAHAMHDKTHDHBX-UHFFFAOYSA-N [N]P(=O)=O Chemical compound [N]P(=O)=O CAHAMHDKTHDHBX-UHFFFAOYSA-N 0.000 title description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 24
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- MVXMNHYVCLMLDD-UHFFFAOYSA-N 4-methoxynaphthalene-1-carbaldehyde Chemical compound C1=CC=C2C(OC)=CC=C(C=O)C2=C1 MVXMNHYVCLMLDD-UHFFFAOYSA-N 0.000 claims description 7
- XZMCDFZZKTWFGF-UHFFFAOYSA-N Cyanamide Chemical compound NC#N XZMCDFZZKTWFGF-UHFFFAOYSA-N 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical class [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims description 2
- 235000019731 tricalcium phosphate Nutrition 0.000 claims description 2
- 229960004838 phosphoric acid Drugs 0.000 claims 4
- 235000011007 phosphoric acid Nutrition 0.000 claims 4
- 239000000203 mixture Substances 0.000 claims 1
- 238000003756 stirring Methods 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000003337 fertilizer Substances 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 2
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 2
- WCQHXQLJPNIYSC-UHFFFAOYSA-N (cyanoamino)phosphonic acid Chemical compound OP(O)(=O)NC#N WCQHXQLJPNIYSC-UHFFFAOYSA-N 0.000 description 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000019739 Dicalciumphosphate Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- LHQWDZSUXOBDOJ-UHFFFAOYSA-N calcium;cyanamide Chemical group [Ca].NC#N LHQWDZSUXOBDOJ-UHFFFAOYSA-N 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 235000019691 monocalcium phosphate Nutrition 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G1/00—Mixtures of fertilisers belonging individually to different subclasses of C05
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C7/00—Fertilisers containing calcium or other cyanamides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Fertilizers (AREA)
Description
Procédé pour la fabrication d'un engrais mixte phosphoazoté. La présente invention se rapporte à un procédé pour la fabrication d'un engrais mixte phosphoazoté, selon lequel on fait réagir une solution phosphorique de cyanamide (CN <B>NH,)</B> sur la cyanamide calcique (CNNCa) connue dans le commerce sous - le nom de chaux azotée.
En faisant varier, d'une part, la quantité d'acide phosphorique employée pour la pré paration de la solution phosphorique de cyanamide (CNNH2), et, d'autre part, la, quantité de cyanamide calcique qui réagit sur cette solution, on peut à volonté préparer des engrais mixtes phosphoazotés dont la teneur en azote et en phosphates solubles diffère, cette teneur étant fonction des quantités d'acide phosphorique et :de cyana.mide calcique em ployées.
Voici, à titre d'exemples comment, selon la présente invention, on peut procéder pour préparer des engrais phosphoazotés: 1 A une solution aqueuse de 44 kg de -cyanamide (CNNHZ) contenant 98 kg d'acide phosphorique, on ajoute peu à peu en remisant, 80 kg -cle cyanamide calcique du commerce. La masse s'échauffe peu à peu et lorsque toute la cyanamide calcique a été ajoutée elle se prend en granules humides plus ou moins solides qu'il suffit de sécher et mettre en sac.
La masse représente un engrais phos- phoazoté contenant environ 20 % d'azote as similable et 40 % d'acide phosphorique solu ble à l'eau et au citrate sous forme de phos phates mono- et bicalcique.
Il est bien entendu que dans cet exemple on peut faire varier dans des proportions no tables la quantité .de cyanamide (CNNHZ), la quantité -d'acide phosphorique et la quantité de cyanamide calcique employées en ayant soin cependant de ne pas ajouter une quantité de cyanamide .calcique telle qu'elle transfor merait l'acide phosphorique employé en phos phates tricalciques insolubles sans valeur pour l'industrie :des engrais.
2 Dans l'exemple ci-dessus, on peut rem placer l'acide phosphorique. pur par de l'acide phosphorique contenant de l'acide sulfurique tel qu'il résulte de sa préparation au moyen des phosphates tricalciques commerciaux trai tés par un excès d'acide sulfurique. L'en grais phosphoazoté obtenu contient alors un peu de sulfate de calcium ne gênant en rien son emploi dans l'agriculture.
Process for the manufacture of a mixed phospho-nitrogen fertilizer. The present invention relates to a process for the manufacture of a phospho-nitrogenous mixed fertilizer, according to which a phosphoric solution of cyanamide (CN <B> NH,) </B> is reacted with calcium cyanamide (CNNCa) known in the field. trade under the name of nitrogenous lime.
By varying, on the one hand, the quantity of phosphoric acid used for the preparation of the phosphoric cyanamide (CNNH2) solution, and, on the other hand, the quantity of calcium cyanamide which reacts with this solution, we can at will prepare mixed phospho-nitrogen fertilizers of which the content of nitrogen and soluble phosphates differs, this content being a function of the quantities of phosphoric acid and: of calcium cyanamide used.
Here are examples of how, according to the present invention, one can proceed to prepare phospho-nitrogen fertilizers: 1 To an aqueous solution of 44 kg of -cyanamide (CNNHZ) containing 98 kg of phosphoric acid, is added little by little by storing, 80 kg - commercially available calcium cyanamide ring. The mass heats up little by little and when all the calcium cyanamide has been added it takes up more or less solid wet granules which it suffices to dry and put in a bag.
The mass represents a phosphorus nitrogen fertilizer containing about 20% as similable nitrogen and 40% phosphoric acid soluble in water and citrate in the form of mono- and dicalcium phos phates.
It is understood that in this example, the quantity of cyanamide (CNNHZ), the quantity of phosphoric acid and the quantity of calcium cyanamide used can be varied in reasonable proportions, taking care, however, not to add a quantity of .calcic cyanamide as it would transform the phosphoric acid used into insoluble tricalcic phos phates of no value for the industry: fertilizers.
2 In the example above, phosphoric acid can be replaced. pure with phosphoric acid containing sulfuric acid as it results from its preparation by means of commercial tricalcium phosphates treated with an excess of sulfuric acid. The phosphorus nitrogen obtained then contains a little calcium sulphate which does not in any way interfere with its use in agriculture.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH97425T | 1920-03-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH97425A true CH97425A (en) | 1923-01-16 |
Family
ID=4355179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH97425D CH97425A (en) | 1920-03-02 | 1920-03-02 | Process for the manufacture of a mixed phospho-nitrogen fertilizer. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH97425A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1007492A4 (en) * | 1996-10-21 | 2003-06-04 | Richard O W Hartman | Method and packaging utilizing calcium cyanamide for soil treatment |
-
1920
- 1920-03-02 CH CH97425D patent/CH97425A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1007492A4 (en) * | 1996-10-21 | 2003-06-04 | Richard O W Hartman | Method and packaging utilizing calcium cyanamide for soil treatment |
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