GB932997A - Improvements in and relating to the prilling of urea - Google Patents

Improvements in and relating to the prilling of urea

Info

Publication number
GB932997A
GB932997A GB772560A GB772560A GB932997A GB 932997 A GB932997 A GB 932997A GB 772560 A GB772560 A GB 772560A GB 772560 A GB772560 A GB 772560A GB 932997 A GB932997 A GB 932997A
Authority
GB
United Kingdom
Prior art keywords
urea
granules
melting point
prilling
relating
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.)
Expired
Application number
GB772560A
Inventor
Martin S Bloom
Donald Anderson Crooks
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB772560A priority Critical patent/GB932997A/en
Publication of GB932997A publication Critical patent/GB932997A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C9/00—Fertilisers containing urea or urea compounds
    • C05C9/005—Post-treatment
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Granules of urea are formed by passing heated discrete quantities of urea at a temperature above its melting point into a body of a denser liquid, e.g. Woods metal or Lipowitz alloy, which is maintained at a lower temperature than the urea's melting point, and collecting urea granules from an upper free surface of the denser liquid. Any metal stuck to the surface of the granules is removed by tumbling them in a rotary screen, passing them through a highly concentrated solution of urea, then through a centrifuge. Two forms of suitable apparatus are described.
GB772560A 1960-03-04 1960-03-04 Improvements in and relating to the prilling of urea Expired GB932997A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB772560A GB932997A (en) 1960-03-04 1960-03-04 Improvements in and relating to the prilling of urea

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB772560A GB932997A (en) 1960-03-04 1960-03-04 Improvements in and relating to the prilling of urea

Publications (1)

Publication Number Publication Date
GB932997A true GB932997A (en) 1963-07-31

Family

ID=9838555

Family Applications (1)

Application Number Title Priority Date Filing Date
GB772560A Expired GB932997A (en) 1960-03-04 1960-03-04 Improvements in and relating to the prilling of urea

Country Status (1)

Country Link
GB (1) GB932997A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3653222A (en) * 1970-02-27 1972-04-04 Bell Telephone Labor Inc Method of freezing solution droplets and the like using immiscible refrigerants of differing densities

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3653222A (en) * 1970-02-27 1972-04-04 Bell Telephone Labor Inc Method of freezing solution droplets and the like using immiscible refrigerants of differing densities

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