GB1114128A - The production of dried granular solid chemical products - Google Patents

The production of dried granular solid chemical products

Info

Publication number
GB1114128A
GB1114128A GB3405465A GB3405465A GB1114128A GB 1114128 A GB1114128 A GB 1114128A GB 3405465 A GB3405465 A GB 3405465A GB 3405465 A GB3405465 A GB 3405465A GB 1114128 A GB1114128 A GB 1114128A
Authority
GB
United Kingdom
Prior art keywords
granules
h3po4
dil
gaseous
bed
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
GB3405465A
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.)
Montedison SpA
Original Assignee
Montedison SpA
Montecatini Edison SpA
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 Montedison SpA, Montecatini Edison SpA filed Critical Montedison SpA
Publication of GB1114128A publication Critical patent/GB1114128A/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
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
    • B01J8/245—Spouted-bed technique
    • 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
    • B01J2/16—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B19/00—Granulation or pelletisation of phosphatic fertilisers, other than slag

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Fertilizers (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Abstract

Granular products are obtained by injecting the appropriate reactants, at least one of which is liquid, solution, slurry, or paste, in an atomized state upwardly into a circulating fluidized bed of growing granules having its cross-section increasing with height, so that material is deposited on the granules (before, during, or after reaction) and any liquid evaporates, the product granules being removed from the top of the bed to keep it level. The reactants may be introduced separately through concentric nozzles, or may be premixed: gases may be introduced at a velocity greater than that of the fluidizing gas (30-100 m./sec.) or may be mixed with it; and liquids may be injected by means of compressed air. The fluidizing gas may be heated, and is introduced at such a rate that the granules are projected upwards in the central zone to form a jet, and then fall back down the side, larger granules tending to remain on top. Inlet gas temperatures of 280-600 DEG C. are referred to. The exhaust gases are treated to recover dust (which is returned), heat, unreacted gases and gaseous products. The product may be screened to obtain granules 0.5-8 mm. in diameter, and fines recycled. The reactor may be cylindrical with a conical lower end of angle 55-65 degrees, the top of the bed being 20-70 cm. above the top of the cone. The reactions listed are: (1) Ammonium phosphate from dil. H3PO4 and gaseous NH3 (Example 1). (2) Na phosphate from dil. H3PO4 and NaOH. (3) Triplesuperphosphate from dil. H3PO4 and pebble phosphorite (Example 2). (4) (NH4)2SO4 from NH3 and H2SO4. (5) Ammonium sulphonitrate from NH3 and (NH4)2SO4, NH4NO3, HNO3 and/or H3PO4. (6) Na or K carbonate from CO2 and dil. NaOH or KOH. (7) AlF3 from gaseous or aqueous HF and Al(OH)3 slurry. (8) Complex fertilizers from HNO3, H3PO4, NH4NO3, gaseous NH3, and K salts, e.g. K2SO4 or KCl, N/P2O5/K2O ratios of 16/16/16, 8/24/24, 18/16/32, 11/22/22 and 12/24/12 may be obtained (Example 3).
GB3405465A 1964-08-12 1965-08-09 The production of dried granular solid chemical products Expired GB1114128A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1742764 1964-08-12

Publications (1)

Publication Number Publication Date
GB1114128A true GB1114128A (en) 1968-05-15

Family

ID=11150346

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3405465A Expired GB1114128A (en) 1964-08-12 1965-08-09 The production of dried granular solid chemical products

Country Status (10)

Country Link
BE (1) BE668009A (en)
CH (1) CH460724A (en)
DE (1) DE1542425A1 (en)
DK (1) DK116451B (en)
ES (1) ES316591A1 (en)
GB (1) GB1114128A (en)
IL (1) IL24090A (en)
NL (1) NL145465B (en)
NO (1) NO121333B (en)
SE (1) SE332158B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999059938A1 (en) * 1998-05-15 1999-11-25 Kemira Agro Oy Process for the preparation of compound fertilizers

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2903289A1 (en) * 1979-01-29 1980-08-07 Otto & Co Gmbh Dr C METHOD FOR GRANULATING THE FALLING PRODUCTS CREATED FROM AMMONIUM COMPOUNDS BY SUBSTITUTION WITH EARTH ALKALINE COMPOUNDS
DE102019211958A1 (en) * 2019-08-08 2021-02-11 Glatt Ingenieurtechnik Gesellschaft mit beschränkter Haftung Process for the production of fertilizer granules
CN116272645B (en) * 2023-05-11 2023-08-04 中建环能科技股份有限公司 Sewage denitrification carrier preparation system and preparation method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999059938A1 (en) * 1998-05-15 1999-11-25 Kemira Agro Oy Process for the preparation of compound fertilizers

Also Published As

Publication number Publication date
IL24090A (en) 1969-07-30
BE668009A (en) 1965-12-01
DK116451B (en) 1970-01-12
ES316591A1 (en) 1966-04-01
NL6509990A (en) 1966-02-14
NL145465B (en) 1975-04-15
DE1542425A1 (en) 1969-12-18
NO121333B (en) 1971-02-15
SE332158B (en) 1971-02-01
CH460724A (en) 1968-08-15

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