DE1024533B - Process for the production of shelf stable, non-caking urea - Google Patents

Process for the production of shelf stable, non-caking urea

Info

Publication number
DE1024533B
DE1024533B DEB41964A DEB0041964A DE1024533B DE 1024533 B DE1024533 B DE 1024533B DE B41964 A DEB41964 A DE B41964A DE B0041964 A DEB0041964 A DE B0041964A DE 1024533 B DE1024533 B DE 1024533B
Authority
DE
Germany
Prior art keywords
urea
production
powdered
shelf stable
sacks
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
Application number
DEB41964A
Other languages
German (de)
Inventor
Dr Walter Michelitsch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to DEB41964A priority Critical patent/DE1024533B/en
Publication of DE1024533B publication Critical patent/DE1024533B/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05CNITROGENOUS FERTILISERS
    • C05C9/00Fertilisers containing urea or urea compounds
    • C05C9/005Post-treatment

Landscapes

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

Description

Verfahren zur Herstellung von lagerbeständigem, nicht zusammenbackendem Harnstoff Harnstoff ist ein besonders in tropischen und subtropischen Gebieten sehr verbreitetes Düngemittel, von dem eine gute Lagerbeständigkeit und Streubarkeit verlangt wird. Da Harnstoff stark zum Zusammenbacken neigt, wird er zur Verbesserung der Lagerbcständigleit häufig mit Stoffen, wie Kieselgu:r, Ton, Kreide oder Talkum, in Mengen bis zu 5 0/0 des Gesamtgewichtes eingepudert. Dennoch entsprechen Harnstoffdüngemittel nicht immer den an sie zu stellenden Bedingungen.Method of making shelf stable, non-caking Urea Urea is a very important one especially in tropical and subtropical areas Common fertilizer, of which a good shelf life and spreadability is required. Since urea has a strong tendency to cake, it becomes an improvement the storage condition is often with substances such as diatomaceous earth, clay, chalk or talc, Powdered in amounts up to 5% of the total weight. Still, urea fertilizers correspond not always the conditions to be imposed on them.

Dies gilt auch für Harnstoff, dem nach einem bekannten Vorschlag entwässertes Aluminiumammoniumsulfat in geringer Menge zugesetzt ist. Derartige kristallwasserbildende Zusätze sättigen sich beim Lagern mit Wasser und können dann den Harnstoff nicht mehr vor dem Zerfließen bewahren.This also applies to urea, which is dehydrated according to a known proposal Aluminum ammonium sulfate is added in a small amount. Such water-forming crystals Additives become saturated with water during storage and then cannot remove the urea keep more from flowing away.

Es wurde nun gefunden, daß man sehr gut lagerbeständigen und gut streubaren, frei rieselnden Harnstoff erhält, wenn man ihn mit geringen Mengen feingepulvertem basischem Aluminiumsulfat einpudert. Mehr als 1 bis 2 Gewichtsprozent des Aluminiumsulfats sind im allgemeinen zur Erzielung der Wirkung nicht erforderlich.It has now been found that you can easily store and spread, Free flowing urea is obtained when it is finely powdered with small amounts powdered in basic aluminum sulfate. More than 1 to 2 percent by weight of the aluminum sulfate are generally not required to achieve the effect.

Beispiel 98 kg Harnstoff in Form von Kügelchen mit einem Durchmesser von 2 bis 3 mm wurden mit 2 kg feinpulverisiertem basischem Aluminiumsulfat mit 12110 S 04 Gehalt in einer Mischtrommel eingepudert. Der feinpulverige Puderstoff haftete sehr gut an den Harnstoffkügelchen. Der gepuderte Harnstoff war farblos.Example 98 kg of urea in the form of beads with a diameter from 2 to 3 mm were mixed with 2 kg of finely powdered basic aluminum sulfate 12110 S 04 content powdered in a mixing drum. The fine powdery powder adhered very well to the urea globules. The powdered urea was colorless.

Der so gepuderte Harnstoff wurde in zwei kaschierte Jutesäcke zu je 50kg abgefüllt. Die Säcke wurden nebeneinandergelegt, mit einer Eisenplatte bedeckt und mit Bleibarren im Gewicht von 2000 kg beschwert. Dies entspricht einer bei Überseetransporten gebräuchlichen Stapelhöhe von 22 Sack übereinander. Die beiden Säcke wurden 2 Monate lang unter dieser Belastung gelassen. Hierauf wurden die Bleibarren und die Eisenplatte entfernt und die Säcke untersucht. Die Säcke fühlten sich weich an, der Sackinhalt war frei rieselnd. Der Feuchtigkeitsgehalt betrug vor und nach der Lagerung 0,30/a. Ebenso verhielt sich Harnstoff in feinen Kristallen, der mit 2% des gleichen basischen Aluminiumsulfats unter den gleichen Bedingungen eingepudert und gelagert wurde.The powdered urea was packed in two laminated jute sacks each 50kg bottled. The sacks were placed side by side and covered with an iron plate and weighted down with lead ingots weighing 2000 kg. This corresponds to one for overseas transports Usual stacking height of 22 sacks on top of each other. The two sacks were 2 months left under this strain for a long time. Then the lead ingots and the iron plate were placed removed and examined the sacks. The sacks felt soft, the contents of the sack was trickling freely. The moisture content before and after storage was 0.30 / a. Urea behaved in the same way in fine crystals, that with 2% of the same basic Aluminum sulfate was powdered and stored under the same conditions.

Zum Vergleich wurden 98 kg Harnstoff in Form von Kügelchen mit einem Durchmesser von 2 bis 3 mm mit 2 kg feinpulveriger brauner Kieselgur in einer Mischtrommel eingepudert. Der so gepuderte Harnstoff wurde wie oben beschrieben gelagert. Nach der Lagerung fühlten sich die Säcke hart an, der Sackinhalt war zusammengebacken. Die Säcke wurden erst nach viermaligem Aufwerfen aus 2 m Höhe weich, der Sackinhalt wurde dabei zu 80% frei rieselnd, der Rest bestand aus bis zu 10 cm großen Brocken.For comparison, 98 kg of urea in the form of beads with a Diameter of 2 to 3 mm with 2 kg of fine powdery brown diatomaceous earth in a mixing drum powdered. The urea powdered in this way was stored as described above. To the sacks felt hard after storage, the contents of the sack were caked together. The sacks only became soft after being thrown up four times from a height of 2 m, the sack contents was 80% flowing freely, the rest consisted of chunks up to 10 cm in size.

Claims (1)

PATrNTANSPRUCH: Verfahren zur Herstellung von lagerbeständigem, nicht zusammenbackendem Harnstoff, dadurch gekennzeichnet, daß man ihn mit basischem Aluminiumsulfat in geringen, im allgemeinen 1 bis 2 Gewichtsprozent nicht übersteigenden Mengen einpudert. In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 609 799.CLAIM: Process for the production of storable, not caking urea, characterized in that it is mixed with basic aluminum sulfate in small amounts, generally not exceeding 1 to 2 percent by weight powdered. Documents considered: German Patent No. 609 799.
DEB41964A 1956-10-02 1956-10-02 Process for the production of shelf stable, non-caking urea Pending DE1024533B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB41964A DE1024533B (en) 1956-10-02 1956-10-02 Process for the production of shelf stable, non-caking urea

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB41964A DE1024533B (en) 1956-10-02 1956-10-02 Process for the production of shelf stable, non-caking urea

Publications (1)

Publication Number Publication Date
DE1024533B true DE1024533B (en) 1958-02-20

Family

ID=6966590

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB41964A Pending DE1024533B (en) 1956-10-02 1956-10-02 Process for the production of shelf stable, non-caking urea

Country Status (1)

Country Link
DE (1) DE1024533B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2508895A1 (en) * 1981-07-03 1983-01-07 Azote Sa Cie Neerlandaise PROCESS FOR THE MANUFACTURE OF PELLETS CONTAINING UREA AS A MAIN COMPONENT

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE609799C (en) * 1931-11-21 1935-02-23 I G Farbenindustrie Akt Ges Process for the production of storage-stable ammonium nitrate and urea

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE609799C (en) * 1931-11-21 1935-02-23 I G Farbenindustrie Akt Ges Process for the production of storage-stable ammonium nitrate and urea

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2508895A1 (en) * 1981-07-03 1983-01-07 Azote Sa Cie Neerlandaise PROCESS FOR THE MANUFACTURE OF PELLETS CONTAINING UREA AS A MAIN COMPONENT

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