JPS5677252A - Granulation of urea - Google Patents

Granulation of urea

Info

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
Application number
JP15316479A
Other languages
Japanese (ja)
Inventor
Toshio Fujita
Hideaki Matsuoka
Shigemitsu Yoshida
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.)
JNC Corp
Original Assignee
Chisso Corp
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 Chisso Corp filed Critical Chisso Corp
Priority to JP15316479A priority Critical patent/JPS5677252A/en
Publication of JPS5677252A publication Critical patent/JPS5677252A/en
Pending legal-status Critical Current

Links

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Fertilizers (AREA)
  • Glanulating (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
JP15316479A 1979-11-27 1979-11-27 Granulation of urea Pending JPS5677252A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4919263A (en) * 1972-04-13 1974-02-20

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4919263A (en) * 1972-04-13 1974-02-20

Cited By (1)

* Cited by examiner, † Cited by third party
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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