WO2012115496A1 - Method for production of granular compound fertilizers - Google Patents

Method for production of granular compound fertilizers Download PDF

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Publication number
WO2012115496A1
WO2012115496A1 PCT/LT2011/000010 LT2011000010W WO2012115496A1 WO 2012115496 A1 WO2012115496 A1 WO 2012115496A1 LT 2011000010 W LT2011000010 W LT 2011000010W WO 2012115496 A1 WO2012115496 A1 WO 2012115496A1
Authority
WO
WIPO (PCT)
Prior art keywords
components
mixer
mixtures
alkaline
weight
Prior art date
Application number
PCT/LT2011/000010
Other languages
French (fr)
Inventor
Alfredas Martynas SVIKLAS
Vidmantas KUCINSKAS
Original Assignee
UAB "ARVI" ir ko
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 UAB "ARVI" ir ko filed Critical UAB "ARVI" ir ko
Priority to EA201290814A priority Critical patent/EA025226B1/en
Priority to EP11770545.9A priority patent/EP2718245A1/en
Priority to UAA201211034A priority patent/UA106519C2/en
Publication of WO2012115496A1 publication Critical patent/WO2012115496A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
    • 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
    • C05G5/10—Solid or semi-solid fertilisers, e.g. powders
    • C05G5/12—Granules or flakes

Definitions

  • This invention relates to the fertilizer industry and may be used for production of granular compound nitrogen, phosphorus and potassium (NPK) fertilizers with the secondary plant nutrients and microelements.
  • NPK granular compound nitrogen, phosphorus and potassium
  • a method for production of compound fertilizers is known where fertilizers are produced from separate solid free flowing fertilizers by mixing them, moistening with water and/or water steam and adding some crushed clay (US patent No.5749936, priority date 07.06.1996, published in 1998). With the use of this method of production the yield of commercial fraction of fertilizers increases, the product quality improves. However, the special clay slurry should be prepared, and the concentration of clay as a ballast up to 5% by weight reduces the amount of nutrient materials in the fertilizer.
  • the closest known technical solution is the method of production of compound fertilizers, wherein the components of solid fertilizers are mixed with the product of interaction of mineral fertilizers and ammonia in a granulator, then the mixture is granulated, dried, fractioned (LT patent No.4720, priority date 29.11.1999, published in 2000).
  • the shortcoming of this method is that nitrogen concentration in the product is not sufficiently high, the amount of fine fraction to be recycled reaches 30-35% by weight, and the efficiency of the granulating device thereby decreases.
  • a method of production of granular compound fertilizers of present invention comprises the mixing of free-flowing solid components of fertilizer during from 1 to 10 min. with moist components, obtained from the tubular reactor arranged in the bottom part of a mixer, wherein the alkaline fertilizer components are neutralized with mineral acids; raising the temperature of a mixture up to 140°C; granulating by spraying with the acidified water and/or heating with water steam; drying, fractionating, and returning the fine fraction of the granulated product to a mixer.
  • an exothermic chemical reaction occurs.
  • the alkaline component consists of ammonia aqueous solutions, containing ammonium nitrate, urea, ammonium sulphate, calcium nitrate, magnesium nitrate or mixtures thereof, potassium hydroxide or potassium salts or mixtures thereof.
  • the acidic component is composed of nitric, phosphoric or sulphuric acids.
  • the amounts and ratios of all the components are selected such that the nitrogen in the granulated product would amount from 5 to 25% by weight, while sulphur - up to 15% by weight.
  • Calcium, magnesium and boron minerals or mixtures thereof may be mixed into the solid fertilizer components.
  • the granular compound fertilizers are produced as represented in the technological scheme (Fig.1).
  • Free-flowing solid components designated for production of fertilizer, from bunkers (1) are weighed with the scales (2) and are fed by the mechanical feeders (3, 5) and an elevator (4) into a mixer (6), wherein they are mixed with moist components, obtained from the tubular reactor arranged in the bottom part of a mixer, wherein the alkaline fertilizer components from a container (7) were neutralized with mineral acids from a container (8), and started to be granulated. Granulation is continued and completed in a granulator (9). The obtained fertilizer is dried in a drier (10) with combustion gas from a furnace (11).
  • the granular fertilizer is lifted by an elevator (12) into a first screen sieve (13), wherefrom the fine fraction of the product is returned into a mixer (6) and the remaining part is cooled in a cooler (14), then fractioned in a second screen sieve (15), and the commercial part of the product is supplied to storage or prior to storage is conditioned with the quality improving materials.
  • the fine fraction is returned to a mixer (6), and oversize particles are crushed in a crusher (16) and fractioned in a screen sieve (15). If calcium, magnesium and boron minerals, mixtures thereof or other plant-friendly nutrients are desired to be added into fertilizers, they are loaded into bunkers (1).
  • the concentration of the nutrients of the granular compound fertilizer and physical- chemical and commercial properties of fertilizer were identified by the standard testing methods.
  • Example 1 The substance of the present invention is illustrated by the following examples.
  • Example 1 The substance of the present invention is illustrated by the following examples.
  • NPK fertilizers are granulated, dried at a temperature of 80°C, and then fractioned by particle size.
  • the obtained NPK fertilizers are of 24:5:5 grades.
  • the yield of the commercial (1-5 mm in diameter) fraction is 91 %.
  • the granular (3 mm) crushing strength is 3520 g/gran.
  • the slurry is mixed with 265 kg of ammonium sulphate, 79 kg of urea, containing 46% of nitrogen, 292 kg of diammophos, 50 kg of ammophos, which contains 12% of nitrogen and 52% of phosphorus pentoxide, and with 267 kg of potassium chloride. Fertilizers are further processed in the same way as in Example 1.
  • the obtained NPK fertilizers are of 16-16-16 grade.
  • the yield of the commercial fraction (1-5 mm in diameter) is 93%.
  • the granular crushing strength is 3320 g/gran.

Landscapes

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

Abstract

The method for production of granular compound fertilizers according to present invention comprises mixing the solid components within 1 to 10 min. with moist components, obtained from the tubular reactor, arranged in the bottom part of a mixer, wherein the alkaline components were neutralized with mineral acids. The temperature of a mixture is raised up to 140°C. Ammonia aqueous solutions, containing ammonium nitrate, urea, ammonium sulphate, calcium nitrate, magnesium nitrate or mixtures thereof, potassium hydroxide or potassium salts or mixtures thereof are used as the alkaline component, whereas nitric, phosphoric or sulphuric acids - as the acidic component. The amount of nitrogen in the granulated product is from 5 to 25%, by weight and sulphur - up to 15% by weight.

Description

METHOD FOR PRODUCTION OF GRANULAR COMPOUND FERTILIZERS
Field of the Invention
This invention relates to the fertilizer industry and may be used for production of granular compound nitrogen, phosphorus and potassium (NPK) fertilizers with the secondary plant nutrients and microelements.
Background of the Invention
A method for production of compound fertilizers is known where fertilizers are produced from separate solid free flowing fertilizers by mixing them, moistening with water and/or water steam and adding some crushed clay (US patent No.5749936, priority date 07.06.1996, published in 1998). With the use of this method of production the yield of commercial fraction of fertilizers increases, the product quality improves. However, the special clay slurry should be prepared, and the concentration of clay as a ballast up to 5% by weight reduces the amount of nutrient materials in the fertilizer.
The closest known technical solution is the method of production of compound fertilizers, wherein the components of solid fertilizers are mixed with the product of interaction of mineral fertilizers and ammonia in a granulator, then the mixture is granulated, dried, fractioned (LT patent No.4720, priority date 29.11.1999, published in 2000). The shortcoming of this method is that nitrogen concentration in the product is not sufficiently high, the amount of fine fraction to be recycled reaches 30-35% by weight, and the efficiency of the granulating device thereby decreases.
Summary of the Invention
A method of production of granular compound fertilizers of present invention comprises the mixing of free-flowing solid components of fertilizer during from 1 to 10 min. with moist components, obtained from the tubular reactor arranged in the bottom part of a mixer, wherein the alkaline fertilizer components are neutralized with mineral acids; raising the temperature of a mixture up to 140°C; granulating by spraying with the acidified water and/or heating with water steam; drying, fractionating, and returning the fine fraction of the granulated product to a mixer. Upon mixing the alkaline component with the acidic component in the tubular reactor, an exothermic chemical reaction occurs. The alkaline component consists of ammonia aqueous solutions, containing ammonium nitrate, urea, ammonium sulphate, calcium nitrate, magnesium nitrate or mixtures thereof, potassium hydroxide or potassium salts or mixtures thereof. The acidic component is composed of nitric, phosphoric or sulphuric acids. The molar ratio of alkaline and acidic components is NH3 : H3P0 = 1-3 : 1 , or NH3 : H2S04 = 0.9-2 : 1 , or NH3 : HN03 = 0.9-1 : 1. The amounts and ratios of all the components are selected such that the nitrogen in the granulated product would amount from 5 to 25% by weight, while sulphur - up to 15% by weight. Calcium, magnesium and boron minerals or mixtures thereof may be mixed into the solid fertilizer components. The granular compound fertilizers are produced as represented in the technological scheme (Fig.1).
Detailed Description of the Invention
Free-flowing solid components, designated for production of fertilizer, from bunkers (1) are weighed with the scales (2) and are fed by the mechanical feeders (3, 5) and an elevator (4) into a mixer (6), wherein they are mixed with moist components, obtained from the tubular reactor arranged in the bottom part of a mixer, wherein the alkaline fertilizer components from a container (7) were neutralized with mineral acids from a container (8), and started to be granulated. Granulation is continued and completed in a granulator (9). The obtained fertilizer is dried in a drier (10) with combustion gas from a furnace (11). The granular fertilizer is lifted by an elevator (12) into a first screen sieve (13), wherefrom the fine fraction of the product is returned into a mixer (6) and the remaining part is cooled in a cooler (14), then fractioned in a second screen sieve (15), and the commercial part of the product is supplied to storage or prior to storage is conditioned with the quality improving materials. The fine fraction is returned to a mixer (6), and oversize particles are crushed in a crusher (16) and fractioned in a screen sieve (15). If calcium, magnesium and boron minerals, mixtures thereof or other plant-friendly nutrients are desired to be added into fertilizers, they are loaded into bunkers (1).
The concentration of the nutrients of the granular compound fertilizer and physical- chemical and commercial properties of fertilizer were identified by the standard testing methods.
The substance of the present invention is illustrated by the following examples. Example 1
200 kg/h of solution, containing 12% by weight of ammonia, 42.5% by weight of urea and 45.5% by weight of water, is neutralized in the tubular reactor of the pilot facility with 72 kg/h of 98% concentration sulphuric acid at a molar ratio NH3 : H2SO4 = 1.95 : 1. The obtained slurry is mixed in a mixer with 109 kg of diammophos, containing 18% of nitrogen and 46% of phosphorus pentoxide, 430 kg of ammonium sulphate, containing 21 % of nitrogen, 200 kg of ammonium nitrate, containing 34% of nitrogen and with 83 kg of potassium chloride, which contains 60% of potassium oxide. Those fertilizers are granulated, dried at a temperature of 80°C, and then fractioned by particle size. The obtained NPK fertilizers are of 24:5:5 grades. The yield of the commercial (1-5 mm in diameter) fraction is 91 %. The granular (3 mm) crushing strength is 3520 g/gran.
Example 2
The 100 kg/h solution of a mixture of alkaline components of the same composition as in Example 1 is neutralized in the tubular reactor of the pilot facility with 35 kg of sulphuric acid of 98% concentration at a molar ratio NH3 : H2S04 = 2 : 1. The slurry is mixed with 265 kg of ammonium sulphate, 79 kg of urea, containing 46% of nitrogen, 292 kg of diammophos, 50 kg of ammophos, which contains 12% of nitrogen and 52% of phosphorus pentoxide, and with 267 kg of potassium chloride. Fertilizers are further processed in the same way as in Example 1. The obtained NPK fertilizers are of 16-16-16 grade. The yield of the commercial fraction (1-5 mm in diameter) is 93%. The granular crushing strength is 3320 g/gran.
In production of granular compound fertilizers by the method of present invention, an exothermic reaction takes place in the tubular reactor when neutralizing the alkaline components with acids, therefore a thermal effect accelerates the formation of granules in a mixer, up to 20% reduces the amount of the product of fine fraction to be recycled, reduces the energy consumption per product unit, and increases the yield of commercial fraction up to 93%. The granular crushing strength increases to 3200-3500 g/gran. The fertilizers obtained in this way have a high concentration of plant nutrients (about 50% NPK and up to 25% of nitrogen). Besides the fertilizers are enriched with the important secondary plant nutrient element - sulphur (up to 15%). The fertilizers produced by a method of present invention may have the plant nutrients of different ratio and amount. This expands the choice of fertilizers and fields of use thereof. The production process of fertilizers is cheaper, more efficient and environmentally friendly.

Claims

1. A method for production of granular compound fertilizers, comprising the mixing of solid components in a mixer, moistening with water and/or water steam, granulating, drying, fractionating and returning the fine fraction to a mixer, and conditioning, c h a r a ct e r i z e d in that the mixing of the solid fertilizer components with moist components, obtained from the tubular reactor arranged in the bottom part of a mixer, wherein the alkaline fertilizer components were neutralized with mineral acids, is continued from 1 to 10 minutes; and raising the temperature of a mixture up to 140°C; granulating is performed by spraying with the acidified water and/or heating with water steam; followed by drying, fractionating and returning the fine fraction of the granulated product to a mixer.
2. The method according to Claim 1, characterized in that, while mixing an alkaline component with an acidic component in the tubular reactor, an exothermic chemical reaction takes place.
3. The method according to Claims 1 and 2, c h a ra cte rized in that the alkaline component comprises the ammonia aqueous solutions, containing ammonium nitrate, urea, ammonium sulphate, calcium nitrate, magnesium nitrate or mixtures thereof, potassium hydroxide or potassium salts or mixtures thereof, whereas the acidic component comprises the nitric, phosphoric or sulphuric acids at a molar ratio NH3 : H3P04 = 1-3 : 1, or NH3 : H2S0 = 0.9-2 : 1, or NH3 : HN03 = 0.9-1 : 1.
4. The method according to any of Claims 1, 2, 3, ch a racterized in that the amounts and ratios of all the components are selected such that the granulated product contains from 5 to 25% by weight of nitrogen, and up to 15% by weight of sulphur.
5. The method according to any of Claims 1,2,3,4, characterized in that calcium, magnesium and boron minerals or mixtures thereof are added into granular fertilizer components.
PCT/LT2011/000010 2011-06-13 2011-08-18 Method for production of granular compound fertilizers WO2012115496A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EA201290814A EA025226B1 (en) 2011-06-13 2011-08-18 Method for production of granular compound fertilizers
EP11770545.9A EP2718245A1 (en) 2011-06-13 2011-08-18 Method for production of granular compound fertilizers
UAA201211034A UA106519C2 (en) 2011-06-13 2011-08-18 Method for producing granulated complex fertilizers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LT2011056A LT5921B (en) 2011-06-13 2011-06-13 Process for preparing bulk compound frtilizer
LT2011056 2011-06-13

Publications (1)

Publication Number Publication Date
WO2012115496A1 true WO2012115496A1 (en) 2012-08-30

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PCT/LT2011/000010 WO2012115496A1 (en) 2011-06-13 2011-08-18 Method for production of granular compound fertilizers

Country Status (5)

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EP (1) EP2718245A1 (en)
EA (1) EA025226B1 (en)
LT (1) LT5921B (en)
UA (1) UA106519C2 (en)
WO (1) WO2012115496A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018073815A1 (en) * 2016-10-22 2018-04-26 Dead Sea Works Ltd. Binders for the granulation of fertilizers
CZ307542B6 (en) * 2017-05-18 2018-11-21 Lovochemie, A.S. A method of preparation of a nitrogen-sulphur granulated fertilizer and a device for implementing this method
US10894749B2 (en) 2017-02-10 2021-01-19 Icl Europe Cooperatief U.A. Polyhalite granulation process
CN112938923A (en) * 2020-12-28 2021-06-11 瓮福（集团）有限责任公司 Preparation method of nutrient-controllable ammonium polyphosphate
US11306033B2 (en) 2016-12-17 2022-04-19 Dead Sea Works Ltd. Process for the production of potassium sulphate and magnesium sulphate from carnallite and sodium sulphate
US12017198B2 (en) 2018-11-30 2024-06-25 Dead Sea Works Ltd. Potash dust granulation process

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3031742B1 (en) 2015-01-21 2016-12-23 Ab7 Innovation PROCESS FOR THE PRODUCTION OF A HYDRO- AND / OR LIPO-ABSORBENT NON-POROUS COMPOSITE MATERIAL OF LIQUID ACTIVE COMPOSITIONS

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1903605A1 (en) * 1969-01-24 1970-08-13 Pechiney Saint Gobain Dry-granulated ammonium salts
CH497353A (en) * 1960-11-14 1970-10-15 Scottish Agricultural Ind Ltd Process for the production of granular ammonium salt - fertilizer
GB1252651A (en) * 1969-01-20 1971-11-10
US3649240A (en) * 1970-08-17 1972-03-14 Camillien Bolduc Process for the production of granulated materials
CA2029887A1 (en) * 1989-03-23 1990-09-24 Zbigniew Boguslawski Process for manufacturing pelletized materials for use in chemical reactions in industry or agriculture
GB2237800A (en) * 1989-11-11 1991-05-15 Willett & Son Fertilizer particle and method of preparation
US5019148A (en) * 1988-06-14 1991-05-28 Agrinutrients Technology Group, Inc. Homogeneous mineral granules by acid-base reaction
US5749936A (en) 1996-06-07 1998-05-12 A.J. Sackett And Sons Company Method of producing dry granular fertilizer and soil amendments using clay slurry and dry chemicals
EP0937694A1 (en) * 1998-02-20 1999-08-25 Fibrophos Limited Plant nutrient composition and method of manufacture
LT2005062A (en) * 2005-06-27 2006-01-25 Uždaroji akcinė bendrovė "ARVI" ir ko Process for preparing free-flowing compound fertilizers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2893858A (en) * 1955-08-25 1959-07-07 Int Minerals & Chem Corp Granulation of fertilizers
LT4720B (en) 1999-11-29 2000-10-25 Kučinsko Firma "Arvi" Method for producing dry granular fertilizer

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH497353A (en) * 1960-11-14 1970-10-15 Scottish Agricultural Ind Ltd Process for the production of granular ammonium salt - fertilizer
GB1252651A (en) * 1969-01-20 1971-11-10
DE1903605A1 (en) * 1969-01-24 1970-08-13 Pechiney Saint Gobain Dry-granulated ammonium salts
US3649240A (en) * 1970-08-17 1972-03-14 Camillien Bolduc Process for the production of granulated materials
US5019148A (en) * 1988-06-14 1991-05-28 Agrinutrients Technology Group, Inc. Homogeneous mineral granules by acid-base reaction
CA2029887A1 (en) * 1989-03-23 1990-09-24 Zbigniew Boguslawski Process for manufacturing pelletized materials for use in chemical reactions in industry or agriculture
GB2237800A (en) * 1989-11-11 1991-05-15 Willett & Son Fertilizer particle and method of preparation
US5749936A (en) 1996-06-07 1998-05-12 A.J. Sackett And Sons Company Method of producing dry granular fertilizer and soil amendments using clay slurry and dry chemicals
EP0937694A1 (en) * 1998-02-20 1999-08-25 Fibrophos Limited Plant nutrient composition and method of manufacture
LT2005062A (en) * 2005-06-27 2006-01-25 Uždaroji akcinė bendrovė "ARVI" ir ko Process for preparing free-flowing compound fertilizers

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE EPODOC [online] EUROPEAN PATENT OFFICE, THE HAGUE, NL; XP002670991, Database accession no. LT-2005062-A *
See also references of EP2718245A1

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018073815A1 (en) * 2016-10-22 2018-04-26 Dead Sea Works Ltd. Binders for the granulation of fertilizers
US10988419B2 (en) 2016-10-22 2021-04-27 Dead Sea Works Ltd. Binders for the granulation of fertilizers
IL266158B2 (en) * 2016-10-22 2023-06-01 Dead Sea Works Ltd Binders for the granulation of fertilizers
US11306033B2 (en) 2016-12-17 2022-04-19 Dead Sea Works Ltd. Process for the production of potassium sulphate and magnesium sulphate from carnallite and sodium sulphate
US10894749B2 (en) 2017-02-10 2021-01-19 Icl Europe Cooperatief U.A. Polyhalite granulation process
CZ307542B6 (en) * 2017-05-18 2018-11-21 Lovochemie, A.S. A method of preparation of a nitrogen-sulphur granulated fertilizer and a device for implementing this method
US12017198B2 (en) 2018-11-30 2024-06-25 Dead Sea Works Ltd. Potash dust granulation process
CN112938923A (en) * 2020-12-28 2021-06-11 瓮福（集团）有限责任公司 Preparation method of nutrient-controllable ammonium polyphosphate
CN112938923B (en) * 2020-12-28 2023-07-07 瓮福（集团）有限责任公司 Preparation method of nutrient-controllable ammonium polyphosphate

Also Published As

Publication number Publication date
EA025226B1 (en) 2016-12-30
EP2718245A1 (en) 2014-04-16
LT2011056A (en) 2013-01-25
LT5921B (en) 2013-04-25
EA201290814A1 (en) 2014-09-30
UA106519C2 (en) 2014-09-10

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