GB1412487A - Manufacture of granular fertilizers - Google Patents

Manufacture of granular fertilizers

Info

Publication number
GB1412487A
GB1412487A GB764273A GB764273A GB1412487A GB 1412487 A GB1412487 A GB 1412487A GB 764273 A GB764273 A GB 764273A GB 764273 A GB764273 A GB 764273A GB 1412487 A GB1412487 A GB 1412487A
Authority
GB
United Kingdom
Prior art keywords
zone
temperature
melt
granulating
gas
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
GB764273A
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.)
BASF SE
Original Assignee
BASF SE
Badische Anilin and Sodafabrik AG
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 BASF SE, Badische Anilin and Sodafabrik AG filed Critical BASF SE
Publication of GB1412487A publication Critical patent/GB1412487A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C1/00—Ammonium nitrate fertilisers
    • C05C1/02—Granulation; Pelletisation; Stabilisation; Colouring
    • 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
    • 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
    • B01J2/12—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in rotating drums
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/30—Layered or coated, e.g. dust-preventing coatings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Fertilizers (AREA)
  • Glanulating (AREA)

Abstract

1412487 Granulating fertilizer BADISCHE ANILIN- & SODA-FABRIK AG 16 Feb 1973 [19 Feb 1972] 7642/73 Heading B5A [Also in Division C1] In a process for making substantially anhydrous granular fertilizer wherein moisturecontaining melts are sprayed on to moving granule cores in a granulating zone, e.g. a drum, whilst a gas inert to the melt and cores is passed through the zone, (a) the granule cores introduced into the zone have a temperature 5-30‹ C. below that of the granulating temperature, (b) the unsaturated water vapour pressure in the zone is 0À05-0À15 atmosphere, (c) the gas stream is adjusted to be 50-90% saturated with water vapour on leaving the zone, (d) the temperature of the melt introduced into the zone is 5-25‹ C. above the granulating temperature provided that the temperature of the melt is equal to or higher than the crystallization temperature of the melt and (e) the granules discharged from the zone are sifted with the tails and fines being recycled to the granulating zone. The melt may contain suspended solids, e.g. comminuted tails and fines which may be heated via steam heat exchangers. Fertilizers of nitro-chalk (lime and ammonia) and ammonium nitrate may be formed having a particle size of 1-3 mm. and a water content of 0À3-0À6% W/W. The gas may be air. Examples of granulating temperature, melt moisture content and inert gas temperatures are given.
GB764273A 1972-02-19 1973-02-16 Manufacture of granular fertilizers Expired GB1412487A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722207922 DE2207922B2 (en) 1972-02-19 1972-02-19 PROCESS FOR THE MANUFACTURING OF LARGETY ANATHER-FREE THINNING AGENT GRANULATES

Publications (1)

Publication Number Publication Date
GB1412487A true GB1412487A (en) 1975-11-05

Family

ID=5836508

Family Applications (1)

Application Number Title Priority Date Filing Date
GB764273A Expired GB1412487A (en) 1972-02-19 1973-02-16 Manufacture of granular fertilizers

Country Status (10)

Country Link
JP (1) JPS4894678A (en)
AT (1) AT321326B (en)
BE (1) BE795630A (en)
DE (1) DE2207922B2 (en)
ES (1) ES411775A1 (en)
FR (1) FR2172296B1 (en)
GB (1) GB1412487A (en)
IT (1) IT977363B (en)
NL (1) NL7302282A (en)
NO (1) NO130640C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113976265A (en) * 2021-10-19 2022-01-28 傅东宇 Solid waste treatment device and treatment method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113976265A (en) * 2021-10-19 2022-01-28 傅东宇 Solid waste treatment device and treatment method thereof

Also Published As

Publication number Publication date
NO130640B (en) 1974-10-07
BE795630A (en) 1973-08-20
NO130640C (en) 1975-01-15
DE2207922B2 (en) 1977-04-21
NL7302282A (en) 1973-08-21
JPS4894678A (en) 1973-12-05
AT321326B (en) 1975-03-25
FR2172296B1 (en) 1977-12-30
IT977363B (en) 1974-09-10
FR2172296A1 (en) 1973-09-28
ES411775A1 (en) 1976-01-01
DE2207922A1 (en) 1973-08-23

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee