DE2040071A1 - Process for making non-baking urea - Google Patents
Process for making non-baking ureaInfo
- Publication number
- DE2040071A1 DE2040071A1 DE19702040071 DE2040071A DE2040071A1 DE 2040071 A1 DE2040071 A1 DE 2040071A1 DE 19702040071 DE19702040071 DE 19702040071 DE 2040071 A DE2040071 A DE 2040071A DE 2040071 A1 DE2040071 A1 DE 2040071A1
- Authority
- DE
- Germany
- Prior art keywords
- urea
- baking
- making non
- sulfur
- prills
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
- C07C273/02—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds
- C07C273/14—Separation; Purification; Stabilisation; Use of additives
Description
Wesseling, den 7.Aug.1970 VP/Dr.Sch-B/KeWesseling, August 7, 1970 VP / Dr Sch-B / Ke
Unser Zeichen: UK 247Our reference: UK 247
[ Verfahren zur Herstellung von nicht-"backendem Harnstoff[Method of making non-baking urea
Die nach den bekannten Verfahren gewonnenen Harnstoffkristeile oder Harnst off prill s "besitzen die Eigenschaft, beim Lagern fest zusammenzubacken. Es ist dies insbesondere beim Einsatz als Düngemittel oder als Futtermittelkomponente für die Wiederkäuerfütterung unerwünscht, da eine gute Streufähigkeit bei diesen Verwendungen Voraussetzung ist. !•lan versucht ,· die Neigung zum Zusammenbacken zu verringern, indem man z.B. die Harnstoffprills einpudert, z.B. mit Kieselgur oder Ton. Auch elementarer Schwefel wurde für diesen Zweck eingesetzt (DBP 1 I64 392). luan kann zwar so die Lagerfähigkeit des Harnstoffs verbessern, läuft aber Gefahr, dass bei der Handhabung des so behandelten Harnstoffs, z.B. beim-Transport in Silofahrzeugen, gegebenenfalls Entmischungen auftreten, die z.B. bei Anwendung von Schwefel als Pudermittel unter Umständen zu örtlichen überdosierungen an Schwefel im Futter führen, die tierphysiologisch bedenklich sein können.The urea crystals obtained by the known method or Harnst off prill s "have the property of sticking together firmly when stored. This is particularly undesirable when used as a fertilizer or as a feed component for ruminant feeding, since good throwing power is a prerequisite for these uses. ! • lan tries to · reduce the tendency to cake by e.g. powder the urea prills, e.g. with kieselguhr or clay. Even elemental sulfur was used for this purpose (DBP 1 I64 392). luan can improve the shelf life of the urea in this way but there is a risk of segregation when handling the urea treated in this way, e.g. during transport in silo vehicles occur which, for example, when using sulfur as a powdering agent, may lead to local overdoses of sulfur in the feed, which can be questionable from an animal physiological point of view.
Es wurde nun gefunden, dass man die geschilderten Nachteile vermeiden kann, wenn man einer Harnstofflösung vor der Kristallisierung oder Prillierung Schwefelverbindungen zusetzt. Als derartige Schwefelverbindungen kommen anorganische Sulfate und Hydrogensulfate, insbesondere die des Natriums, in Betracht, gegebenenfalls auch organische Schwefelverbindungen, wie Methionin, für sich oder im Gemisch. Man erhält dann Prills, in denen der Schwefel homogen verteilt vorliegt. Damit ist die Gefahr von Überdosierungen an Schwefel nicht mehr möglich, da keine Entmischung stattfinden kann. Überraschend war es dabei,, dass derartige, eine Schwefelverbindung enthaltende Prills praktisch keine Neigung mehr zum Zusammenbacken zeigen oder nur geringe, unter 1 fo liegende Anteile eines Pudermittels, wie Kieselgur", erfordern, damit die Backneigung nicht mehr auftritt. Damit kann zumeist die sonst übliche Nachbehandlung des Harnstoffs entfallen.It has now been found that the disadvantages outlined can be avoided if sulfur compounds are added to a urea solution before crystallization or prilling. Such sulfur compounds are inorganic sulfates and hydrogen sulfates, in particular those of sodium, optionally also organic sulfur compounds, such as methionine, alone or as a mixture. Prills are then obtained in which the sulfur is homogeneously distributed. This means that there is no longer any risk of sulfur overdosing, as segregation cannot take place. It was surprising that such prills containing a sulfur compound show practically no tendency to cake together or only require small amounts of a powder agent such as diatomaceous earth below 1 fo so that the tendency to bake no longer occurs The usual post-treatment of the urea is not required.
Zu 3^00 kg einer wässrigen Harnstofflösung, die 65$ Harnstoff und 0,3 % Biuret enthielt, wurden bei ca. 90° G 7° kg NagSO, zugesetzt. Die Lösung wurde im Vakuum auf einen Wassergehalt von ca. 0,3 $ eingedampftTo 3,000 kg of an aqueous urine solution containing 65 % urea and 0.3% biuret, 7 ° kg of NagSO were added at about 90 ° G. The solution was evaporated in vacuo to a water content of about $ 0.3
209808/1849209808/1849
Unser Zeichen: UK 247Our reference: UK 247
-Z--Z-
und anschliessend in üblicher Weise prilliert. Die so gewonnenen Prills enthielten ca. 0,8 % S und waren gut streufähig.and then prilled in the usual way. The prills obtained in this way contained approx. 0.8 % S and were easy to spread.
209808/1849209808/1849
Claims (1)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702040071 DE2040071A1 (en) | 1970-08-12 | 1970-08-12 | Process for making non-baking urea |
| GB3573071A GB1318666A (en) | 1970-08-12 | 1971-07-29 | Process for the production of non-caking urea |
| NL7110580A NL7110580A (en) | 1970-08-12 | 1971-07-30 | |
| BE770932A BE770932A (en) | 1970-08-12 | 1971-08-04 | UREA PREPARATION PROCESS NOT TAKING INTO ACCOUNT |
| FR7129407A FR2104243A5 (en) | 1970-08-12 | 1971-08-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702040071 DE2040071A1 (en) | 1970-08-12 | 1970-08-12 | Process for making non-baking urea |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2040071A1 true DE2040071A1 (en) | 1972-02-17 |
Family
ID=5779548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19702040071 Pending DE2040071A1 (en) | 1970-08-12 | 1970-08-12 | Process for making non-baking urea |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE770932A (en) |
| DE (1) | DE2040071A1 (en) |
| FR (1) | FR2104243A5 (en) |
| GB (1) | GB1318666A (en) |
| NL (1) | NL7110580A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3135885A1 (en) | 2022-05-25 | 2023-12-01 | Sipa Services | Device for closing holes for panels, particularly furniture |
-
1970
- 1970-08-12 DE DE19702040071 patent/DE2040071A1/en active Pending
-
1971
- 1971-07-29 GB GB3573071A patent/GB1318666A/en not_active Expired
- 1971-07-30 NL NL7110580A patent/NL7110580A/xx unknown
- 1971-08-04 BE BE770932A patent/BE770932A/en unknown
- 1971-08-11 FR FR7129407A patent/FR2104243A5/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL7110580A (en) | 1972-02-15 |
| BE770932A (en) | 1971-12-16 |
| GB1318666A (en) | 1973-05-31 |
| FR2104243A5 (en) | 1972-04-14 |
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