DE1592701B1 - Process for the preparation of a granulated NPK fertilizer - Google Patents
Process for the preparation of a granulated NPK fertilizerInfo
- Publication number
- DE1592701B1 DE1592701B1 DE19621592701 DE1592701A DE1592701B1 DE 1592701 B1 DE1592701 B1 DE 1592701B1 DE 19621592701 DE19621592701 DE 19621592701 DE 1592701 A DE1592701 A DE 1592701A DE 1592701 B1 DE1592701 B1 DE 1592701B1
- Authority
- DE
- Germany
- Prior art keywords
- mixture
- granulated
- urea
- npk fertilizer
- preparation
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 8
- 239000003337 fertilizer Substances 0.000 title claims description 6
- 239000000203 mixture Substances 0.000 claims description 12
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 8
- 239000004202 carbamide Substances 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 235000013312 flour Nutrition 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical class [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 3
- 235000013877 carbamide Nutrition 0.000 claims 1
- 235000013339 cereals Nutrition 0.000 description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 159000000001 potassium salts Chemical class 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004720 fertilization Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- 230000005070 ripening Effects 0.000 description 1
- 239000011833 salt mixture Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- GBNXLQPMFAUCOI-UHFFFAOYSA-H tetracalcium;oxygen(2-);diphosphate Chemical compound [O-2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GBNXLQPMFAUCOI-UHFFFAOYSA-H 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B5/00—Thomas phosphate; Other slag phosphates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Description
Die Erfindung betrifft ein Verfahren zur Herstellung eines granulierten NPK-Düngemittels, durch Granulierung einer Mischung aus Thomasmehl, Harnstoff, Kalisalzen und 1 bis 15 Gewichtsprozent Wasser und Trocknung der erhaltenen Granulate.The invention relates to a method of manufacture a granulated NPK fertilizer, by granulating a mixture of Thomas flour, Urea, potassium salts and 1 to 15 percent by weight of water and drying of the granules obtained.
Bekannt ist ein Verfahren zur Herstellung eines granulierten NPK-Düngemittels durch Granulierung einer Mischung aus Thomasphosphat, Harnstoff, Kalisalzen und 1 bis 15% Wasser und Trocknung der erhaltenen Granulate (französische Patentschrift 1137 045). Demgegenüber besteht das erfindungsgemäße Verfahren darin, daß zunächst Thomasmehl und Harnstoff gemischt und die erhaltene Mischung mit Kalisalzen vermischt werden, worauf die Gesamtmischung unter Zusatz von Wasser in Mengen von 4 bis 12 Gewichtsprozent, bezogen auf die trokkene Gesamtmischung, granuliert, und die Trocknung der Granulate erst nach einer Reifezeit von etwa 30 Minuten vorgenommen werden.A method for producing a granulated NPK fertilizer by granulation is known a mixture of Thomas phosphate, urea, potassium salts and 1 to 15% water and drying of the granules obtained (French patent specification 1137 045). In contrast, there is the inventive Method in that Thomas flour and urea are first mixed and the mixture obtained be mixed with potash salts, whereupon the total mixture with the addition of water in quantities from 4 to 12 percent by weight, based on the total dry mixture, granulated, and the drying the granules can only be made after a maturing time of about 30 minutes.
Das Verfahren gemäß der Anmeldung unterscheidet sich von dem bekannten Verfahren einmal durch die Reihenfolge, in der die verschiedenen Ausgangsstoffe gemischt werden, und ferner durch die Einschaltung einer Reifezeit zwischen Granulierung und Trocknung.The method according to the application differs from the known method once by the order in which the various starting materials are mixed, and also by the Incorporation of a maturing time between granulation and drying.
Die Reihenfolge der Mischung ist deshalb von Wichtigkeit, weil Thomasmehl und Harnstoff in Pulverform angeliefert und eingesetzt werden, während Kaliumträger handelsüblich als körniges Salz verwendet wird. Es wurde gefunden, daß sich das Gemisch der pulverförmigen Komponenten mit dem Salz eng verzahnt und agglomeriert, wodurch besonders günstige Voraussetzungen für die während der Reifezeit ablaufenden Reaktionen geschaffen werden.The order in which the mixture is mixed is important because thomas flour and urea are in Powdered form are supplied and used, while potassium carriers are commercially available as granular salt is used. It was found that the mixture of the powdery components with the Salt closely interlocked and agglomerated, creating particularly favorable conditions for during the Reactions to maturity are created.
Während der Reifezeit löst sich jeweils ein Teil des Harnstoffes und des Kaliumsalzes in dem eingebrachten Wasser. Dieser Lösungsvorgang muß lange genug (etwa 30 Minuten) ablaufen, damit bei der nachfolgenden Trocknung eine genügend große Menge des in feiner Form auskristallisierenden Harnstoff-Kaliumsalz-Gemisches die nicht aufgelösten Körner durchsetzt und so zu der angestrebten hohen Kornfestigkeit von 1,5 kg/Korn bei einer durchschnittlichen Korngröße von 1,5 mm führt.During the ripening period, part of the urea and the potassium salt dissolve in the introduced Water. This solution process must run long enough (about 30 minutes) so that the subsequent drying a sufficiently large amount of the urea-potassium salt mixture which crystallizes out in fine form the undissolved grains penetrated and so to the desired high grain strength of 1.5 kg / grain with an average Grain size of 1.5 mm leads.
Durch das erfindungsgemäße Verfahren gelingt es, einen granulierten NPK-Dünger zu erzeugen, der sowohl eine hinreichend hohe Kornfestigkeit besitzt als auch nach dem Einbringen in den Boden durch Berührung mit Wasser innerhalb kürzester Zeit zu Staubfeinheit zerfällt und damit eine hohe Düngewirksamkeit gewährleistet.The inventive method makes it possible to produce a granulated NPK fertilizer that has both a sufficiently high grain strength and after it has been introduced into the ground Contact with water disintegrates to dust fineness within a very short time and thus a high fertilization effectiveness guaranteed.
Die Bestandteile des Düngers sind in einem Verhältnis zu mischen, daß das Endprodukt etwa 10% N, 10% P0O5 (zitronensäurelöslich) und 15% K2O enthält.The components of the fertilizer are to be mixed in such a ratio that the end product contains about 10% N, 10% P 0 O 5 (citric acid soluble) and 15% K 2 O.
Bei Verwendung von 19,5 Teilen Harnstoff, 56,5 Teilen Thomasmehl und 24 Teilen KCl, welche in der oben beschriebenen Weise behandelt werden, ergibt sich eine Zusammensetzung des Endproduktes von 9% N, 9% P2O5 (zitronensäurelöslich) und 14,4% K0O mit der ebenfalls genannten Kornfestigkeit. Using 19.5 parts of urea, 56.5 parts of Thomas's flour and 24 parts of KCl, which are treated in the manner described above, results in a composition of the end product of 9% N, 9% P 2 O 5 (citric acid-soluble) and 14 , 4% K 0 O with the grain strength also mentioned.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEM0055098 | 1962-12-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1592701B1 true DE1592701B1 (en) | 1971-09-16 |
Family
ID=7308203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19621592701 Pending DE1592701B1 (en) | 1962-12-11 | 1962-12-11 | Process for the preparation of a granulated NPK fertilizer |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1592701B1 (en) |
| GB (1) | GB1011616A (en) |
| LU (1) | LU44916A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4500335A (en) * | 1980-12-30 | 1985-02-19 | Texas A&M University | Composition of matter and method of use for nitrogen fertilization |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1137045A (en) * | 1955-11-23 | 1957-05-22 | Process for the manufacture of granular fertilizers containing urea and fertilizers obtained by this process |
-
1962
- 1962-12-11 DE DE19621592701 patent/DE1592701B1/en active Pending
-
1963
- 1963-11-30 LU LU44916D patent/LU44916A1/xx unknown
- 1963-12-11 GB GB4895863A patent/GB1011616A/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1137045A (en) * | 1955-11-23 | 1957-05-22 | Process for the manufacture of granular fertilizers containing urea and fertilizers obtained by this process |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1011616A (en) | 1965-12-01 |
| LU44916A1 (en) | 1964-01-30 |
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