JPS5677252A - Granulation of urea - Google Patents
Granulation of ureaInfo
- Publication number
- JPS5677252A JPS5677252A JP15316479A JP15316479A JPS5677252A JP S5677252 A JPS5677252 A JP S5677252A JP 15316479 A JP15316479 A JP 15316479A JP 15316479 A JP15316479 A JP 15316479A JP S5677252 A JPS5677252 A JP S5677252A
- Authority
- JP
- Japan
- Prior art keywords
- urea
- molten
- biuret
- powdery
- melting
- 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
Landscapes
- Glanulating (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Fertilizers (AREA)
Abstract
PURPOSE: To prevent the by-production biuret which is harmful to crop, in the granulation of urea from molten, urea, by adding fine urea powder to the molten urea.
CONSTITUTION: In the preparation of granular urea by spraying molten urea to nucleus particles (of urea) in a rotary drum, a rotary pan, a jet-stream tank, etc., fine urea powder is added to the molten urea before feeding to the granulation apparatus. The addition of the powdery urea prevents the by-production of biuret which occurs by heating and melting urea even for a short time. The mixing of the powdery urea may be carried out by melting the urea incompletely and leaving a part of the powdery urea undissolved. For example, the amount of by-produced biuret is very small even by storing urea in a melting tank at 137W132°C for 1W30min.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15316479A JPS5677252A (en) | 1979-11-27 | 1979-11-27 | Granulation of urea |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15316479A JPS5677252A (en) | 1979-11-27 | 1979-11-27 | Granulation of urea |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5677252A true JPS5677252A (en) | 1981-06-25 |
Family
ID=15556436
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15316479A Pending JPS5677252A (en) | 1979-11-27 | 1979-11-27 | Granulation of urea |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5677252A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102126901A (en) * | 2011-01-25 | 2011-07-20 | 中国科学院南京土壤研究所 | Granulator and preparation method for coated 15N urea |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4919263A (en) * | 1972-04-13 | 1974-02-20 |
-
1979
- 1979-11-27 JP JP15316479A patent/JPS5677252A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4919263A (en) * | 1972-04-13 | 1974-02-20 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102126901A (en) * | 2011-01-25 | 2011-07-20 | 中国科学院南京土壤研究所 | Granulator and preparation method for coated 15N urea |
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