AT99638B - Process for the production of a fertilizer containing phosphorus and nitrogen. - Google Patents
Process for the production of a fertilizer containing phosphorus and nitrogen.Info
- Publication number
- AT99638B AT99638B AT99638DA AT99638B AT 99638 B AT99638 B AT 99638B AT 99638D A AT99638D A AT 99638DA AT 99638 B AT99638 B AT 99638B
- Authority
- AT
- Austria
- Prior art keywords
- nitrogen
- sulfuric acid
- production
- containing phosphorus
- fertilizer containing
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title description 4
- 239000003337 fertilizer Substances 0.000 title description 4
- 238000004519 manufacturing process Methods 0.000 title description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title description 3
- 229910052698 phosphorus Inorganic materials 0.000 title description 3
- 239000011574 phosphorus Substances 0.000 title description 3
- 229910052757 nitrogen Inorganic materials 0.000 title description 2
- 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 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 24
- 239000001506 calcium phosphate Substances 0.000 description 6
- 229910000389 calcium phosphate Inorganic materials 0.000 description 6
- 235000011010 calcium phosphates Nutrition 0.000 description 6
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- XZMCDFZZKTWFGF-UHFFFAOYSA-N Cyanamide Chemical compound NC#N XZMCDFZZKTWFGF-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 description 1
- YYRMJZQKEFZXMX-UHFFFAOYSA-N calcium;phosphoric acid Chemical compound [Ca+2].OP(O)(O)=O.OP(O)(O)=O YYRMJZQKEFZXMX-UHFFFAOYSA-N 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 239000002426 superphosphate Substances 0.000 description 1
Landscapes
- Fertilizers (AREA)
Description
<Desc/Clms Page number 1>
Verfahren zur Herstellung eines phosphor-und stickstoffhaltigen Düngemittels.
Gegenstand der Erfindung ist ein Verfahren zur Herstellung eines phosphor-und stickstoffhaltigen Düngemittels durch Behandlung von Gemischen von Kalziumphosphat und Kalziumzyanamid mit Schwefelsäure. Die bekannten Schwetelsäureverfahren, bei denen die Behandlung mit Schwefelsäure nach der Mischung des Zyanamids und des Phosphats durchgeführt wird, haben sich in der Praxis nicht bewährt, da sich bei ihnen verschiedene Unzulässigkeiten zeigen, die einerseits auf die bei der Reaktion sich entwickelnde grosse Hitze zurückzuführen sind, anderseits darin bestehen, dass in dem Endprodukte etwa 2 bis 3 o von unlöslicher Phosphorsäure verbleibt, die von den Pflanzen nicht assimiliert wird.
Diese Nachteile werden der Erfindung gemäss dadurch vermieden und die Durchführung des Schwefelsäureverfahrens dadurch technisch einwandfrei ermöglicht, dass einerseits das zu mischende Phosphat und Zyanamid der Behandlung mit Schwefelsäure in zwei verschiedenen, zeitlich getrennten Arbeitsgängen ausgesetzt werden, anderseits gleichzeitig mit dem Zyanamid dem Gemische Wasser zugefügt wird.
Das Verfahren gemäss der Erfindung wird derart durchgeführt, dass zunächst das Kalziumphosphat in einem gewöhnlichen Superphosphatmischer der Einwirkung von Schwefelsäure so lange ausgesetzt wird. bis seine weitgehendste Disgregation eizielt worden ist. Hierauf fügt man das Kalziumzyanamid hinzu, und setzt das Mischen und die Einwirkung der Schwefelsäure noch kurze Zeit fort. In dieser Weise wird im Anfange die weitgehendste Löslichkeitsmachung des Kalziumphosphats erlangt und die heftige Reaktion, die im Augenblicke der Einwirkung der Schwefelsäure auftritt, in zweiPerioden zerlegt, so dass die Arbeit der Werldeute bequemer wird. Gleichzeitig mit dem Kalziumzyanamid fügt man Wasser hinzu, wodurch die weitmöglichste Löslichkeit der Phosphorsäure erlangt wird.
Die einzelnen Bestandteile zur Durchführung des Verfahrens werden z. B. in den folgenden Mengenverhältnissen verwendet :
EMI1.1
<tb>
<tb> Kalziumphosphat <SEP> 45 <SEP> Teile,
<tb> Kalziumzyanamid <SEP> 17"
<tb> Schwefelsäure <SEP> 50-52'B6 <SEP> 74"
<tb> Wasser <SEP> 10"
<tb>
Kurz nach der Beimischung des Kalziumzyanamids wird die Masse aus dem Mischbehälter in darunter befindliche Behälter oder Keller abgelassen, in denen die Reaktion sich fortsetzt und die sich entwickelnden Dämpfe durch Ventilatoren entfernt werden. Aus diesen Behältern oder Kellern kann dann die Masse nach etwa zwanzig Minuten entfernt werden.
PATENT-ANSPRÜCHE :
1. Verfahren zur Herstellung eines phosphor-und stickstoffhaltigen Düngemittels aus Kalziumphosphat, Kalziumzyanamid und Schwefelsäure, dadurch gekennzeichnet, dass dem durch Schwefelsäure völlig zersetzten Kalziumphosphat Kalziumzyanamid zugesetzt wird und das Mischen und die Einwirkung der Schwefelsäure noch kurze Zeit fortgesetzt wird.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Process for the production of a fertilizer containing phosphorus and nitrogen.
The invention relates to a process for the production of a phosphorus and nitrogen-containing fertilizer by treating mixtures of calcium phosphate and calcium cyanamide with sulfuric acid. The well-known sulfuric acid processes, in which the treatment with sulfuric acid is carried out after the cyanamide and the phosphate have been mixed, have not proven themselves in practice, since they show various imperfections, which on the one hand can be attributed to the great heat developing during the reaction , on the other hand, there remains in the end product about 2 to 3 o of insoluble phosphoric acid which is not assimilated by the plants.
According to the invention, these disadvantages are avoided and the sulfuric acid process can be carried out in a technically flawless manner by exposing the phosphate and cyanamide to be mixed to the treatment with sulfuric acid in two different, chronologically separate operations, and by adding water to the mixture at the same time as the cyanamide .
The method according to the invention is carried out in such a way that first the calcium phosphate is exposed to the action of sulfuric acid for so long in a conventional superphosphate mixer. until its most extensive disgregation has been achieved. The calcium cyanamide is then added, and the mixing and the action of the sulfuric acid are continued for a short time. In this way the most extensive solubilization of the calcium phosphate is attained at the beginning, and the violent reaction which occurs at the moment of the action of the sulfuric acid is broken down into two periods, so that the work of the people becomes more convenient. At the same time as the calcium cyanamide, water is added, whereby the greatest possible solubility of phosphoric acid is achieved.
The individual components for carrying out the method are z. B. used in the following proportions:
EMI1.1
<tb>
<tb> calcium phosphate <SEP> 45 <SEP> parts,
<tb> Calcium cyanamide <SEP> 17 "
<tb> sulfuric acid <SEP> 50-52'B6 <SEP> 74 "
<tb> water <SEP> 10 "
<tb>
Shortly after the calcium cyanamide has been added, the mixture is drained from the mixing container into containers or basements below, where the reaction continues and the vapors that develop are removed by fans. The mass can then be removed from these containers or cellars after about twenty minutes.
PATENT CLAIMS:
1. A process for the production of a phosphorus- and nitrogen-containing fertilizer from calcium phosphate, calcium cyanamide and sulfuric acid, characterized in that calcium cyanamide is added to the calcium phosphate completely decomposed by sulfuric acid and the mixing and the action of the sulfuric acid is continued for a short time.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT99638X | 1921-05-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT99638B true AT99638B (en) | 1925-04-10 |
Family
ID=11133454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT99638D AT99638B (en) | 1921-05-14 | 1921-12-15 | Process for the production of a fertilizer containing phosphorus and nitrogen. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT99638B (en) |
-
1921
- 1921-12-15 AT AT99638D patent/AT99638B/en active
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