GB1459781A - Prilling - Google Patents

Prilling

Info

Publication number
GB1459781A
GB1459781A GB659273A GB659273A GB1459781A GB 1459781 A GB1459781 A GB 1459781A GB 659273 A GB659273 A GB 659273A GB 659273 A GB659273 A GB 659273A GB 1459781 A GB1459781 A GB 1459781A
Authority
GB
United Kingdom
Prior art keywords
droplets
drops
volatile
tower
volatile material
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
GB659273A
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.)
Fisons Ltd
Original Assignee
Fisons 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 Fisons Ltd filed Critical Fisons Ltd
Priority to GB659273A priority Critical patent/GB1459781A/en
Priority to US05/594,674 priority patent/US4031174A/en
Publication of GB1459781A publication Critical patent/GB1459781A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
    • B01J2/04—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a gaseous medium

Landscapes

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

Abstract

1459781 Prilling FISONS Ltd 7 Jan 1974 [9 Feb 1973 18 April 1973] 6592/73 and 18609/73 Heading B5A [Also in Divisions C1 and C2] Molten material such as sulphur, urea, NPK fertilizer or an alkali-metal hydroxide is prilled by causing droplets of the material to travel against a counter-current of drops of material which volatalises on contact with the molten material suspended in a gas stream saturated with respect to the volatile material so that at least the surface of the drops solidifies before collection. Droplets, formed by flowing through a perforated plate, by spraying or by a spinning basket fall down a tower into which is upwardly sprayed water or a low boiling point alcohol, ketone or halogenated hydrocarbon. Air, N 2 or CO 2 is fed into the spray or down into the tower by the upcurrent. Tangential sprays may cause swirling of the upcurrent. Material for incorporation in the molten droplets may be dissolved in the volatile material. After falling through a portion of the tower free from drops of volatile material, so that excess volatile material may evaporate, the droplets are collected in a liquid or fluidized bed of material which forms a coating on the droplets, or in the liquid forming the volatile drops, or in a solvent which removes excess of the volatile material.
GB659273A 1973-02-09 1973-02-09 Prilling Expired GB1459781A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB659273A GB1459781A (en) 1973-02-09 1973-02-09 Prilling
US05/594,674 US4031174A (en) 1973-02-09 1975-07-10 Process of prilling molten materials

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB659273A GB1459781A (en) 1973-02-09 1973-02-09 Prilling
GB1860973 1973-04-18

Publications (1)

Publication Number Publication Date
GB1459781A true GB1459781A (en) 1976-12-31

Family

ID=26240810

Family Applications (1)

Application Number Title Priority Date Filing Date
GB659273A Expired GB1459781A (en) 1973-02-09 1973-02-09 Prilling

Country Status (1)

Country Link
GB (1) GB1459781A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5236466A (en) * 1991-08-30 1993-08-17 Chilean Nitrate Corporation Fast cooling of partially solidified granules of low melting, subliming substances obtained by prilling
US5437691A (en) * 1991-08-30 1995-08-01 Chilean Nitrate Corporation Production of spherical shaped products of subliming substances
US5514307A (en) * 1992-10-13 1996-05-07 Laroche Industries, Inc. Process for the reducing emissions during prilling of material such as ammonium nitrate
WO2000063137A1 (en) * 1999-04-15 2000-10-26 Rutgers, The State University Of New Jersey Phosphate sulfur fertilizer particles and methods for making same
EP1205455A1 (en) * 2000-11-14 2002-05-15 Urea Casale S.A. Method and apparatus for obtaining urea prills

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5236466A (en) * 1991-08-30 1993-08-17 Chilean Nitrate Corporation Fast cooling of partially solidified granules of low melting, subliming substances obtained by prilling
US5437691A (en) * 1991-08-30 1995-08-01 Chilean Nitrate Corporation Production of spherical shaped products of subliming substances
US5514307A (en) * 1992-10-13 1996-05-07 Laroche Industries, Inc. Process for the reducing emissions during prilling of material such as ammonium nitrate
WO2000063137A1 (en) * 1999-04-15 2000-10-26 Rutgers, The State University Of New Jersey Phosphate sulfur fertilizer particles and methods for making same
US6217629B1 (en) 1999-04-15 2001-04-17 Rutgers, The State University Of New Jersey Phosphate sulfur fertilizer particles and methods for making same
EP1205455A1 (en) * 2000-11-14 2002-05-15 Urea Casale S.A. Method and apparatus for obtaining urea prills
US6827887B2 (en) 2000-11-14 2004-12-07 Urea Casale S.A. Method for obtaining urea prills

Similar Documents

Publication Publication Date Title
US4190622A (en) Process for prilling urea
FI843349A (en) FOERFARANDE FOER FRAMSTAELLNING AV GRANULAT.
US2774660A (en) Granulation of fertilizers
CA2141874A1 (en) Process for the production of urea granules
US3475132A (en) Fluidized bed for the granulation of fertilizers
US4024210A (en) Sulfur pelletizing
GB1459781A (en) Prilling
US5514307A (en) Process for the reducing emissions during prilling of material such as ammonium nitrate
US4031174A (en) Process of prilling molten materials
GB1503504A (en) Prilling process
UST980005I4 (en) Granulation and coating by improved method of heat removal
GB1454884A (en) Process and device for preparing prills
GB466795A (en) Improvements in or relating to the production of ammonium nitrate in granular form
SE8204077D0 (en) A PROCESS FOR MAKING GRANULES CONTAINING UREA AS THE MAIN COMPONENT
US4153431A (en) Process and apparatus for cleaning prilling tower effluent
GB1189543A (en) Process and Apparatus for Producing a Particulate Product
GB1090971A (en) Method and apparatus for producing microencapsulated particles
US4028447A (en) Method of prilling material
US3887130A (en) Sulfur pelletizing
GB1498606A (en) System for diminishing the emission of noxious gases
ATE92472T1 (en) PROCESS FOR PRODUCTION OF CALCIUM NITRATE UREA.
FR2286672A1 (en) Sulphur granules solidified from molten sulphur droplets - delivered from vortex-chambered nozzle into water
JPS557527A (en) Production of uranium trioxode from uranyl nitrate
AT239278B (en) Process for the production of granular fertilizers in spherical form by spraying fertilizer melt
JPS57171956A (en) Concentration of aqueous solution of urea

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee