WO2004039722A1 - Method for production of nitrate-containing products from undercooling melts - Google Patents

Method for production of nitrate-containing products from undercooling melts Download PDF

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Publication number
WO2004039722A1
WO2004039722A1 PCT/NO2002/000400 NO0200400W WO2004039722A1 WO 2004039722 A1 WO2004039722 A1 WO 2004039722A1 NO 0200400 W NO0200400 W NO 0200400W WO 2004039722 A1 WO2004039722 A1 WO 2004039722A1
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WO
WIPO (PCT)
Prior art keywords
weight
melt
nitrate
particles
water
Prior art date
Application number
PCT/NO2002/000400
Other languages
French (fr)
Inventor
Jan Birger Isaksen
Lars Moland
Torstein Obrestad
Original Assignee
Yara International Asa
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
Priority to UAA200505207A priority Critical patent/UA80163C2/en
Priority to DE60211039T priority patent/DE60211039T2/en
Priority to CNB028298349A priority patent/CN1307090C/en
Priority to PCT/NO2002/000400 priority patent/WO2004039722A1/en
Priority to MXPA05004624A priority patent/MXPA05004624A/en
Priority to DK02778107T priority patent/DK1556308T3/en
Priority to PT02778107T priority patent/PT1556308E/en
Priority to AU2002339757A priority patent/AU2002339757B9/en
Priority to NZ539890A priority patent/NZ539890A/en
Priority to SK5036-2005A priority patent/SK287778B6/en
Priority to BRPI0215929-5A priority patent/BR0215929B1/en
Priority to AT02778107T priority patent/ATE324352T1/en
Priority to EA200500754A priority patent/EA008385B1/en
Priority to ES02778107T priority patent/ES2261746T3/en
Application filed by Yara International Asa filed Critical Yara International Asa
Priority to CA002503842A priority patent/CA2503842C/en
Priority to SI200220044A priority patent/SI21742A/en
Priority to ROA200500397A priority patent/RO121775B1/en
Priority to US10/533,417 priority patent/US7500995B2/en
Priority to EP02778107A priority patent/EP1556308B1/en
Priority to JP2004548172A priority patent/JP4435689B2/en
Priority to HU0500835A priority patent/HU230118B1/en
Priority to CZ2005-315A priority patent/CZ306507B6/en
Priority to EG2003101006A priority patent/EG23430A/en
Publication of WO2004039722A1 publication Critical patent/WO2004039722A1/en
Priority to NO20051857A priority patent/NO20051857L/en
Priority to IL168185A priority patent/IL168185A/en
Priority to BG109137A priority patent/BG66487B1/en
Priority to HRP20050374AA priority patent/HRP20050374B1/en
Priority to CY20061100952T priority patent/CY1105077T1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F5/00—Compounds of magnesium
    • C01F5/38—Magnesium nitrates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
    • C01B21/48—Methods for the preparation of nitrates in general
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/36—Nitrates
    • C01F11/44—Concentrating; Crystallisating; Dehydrating; Preventing the absorption of moisture or caking
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C1/00—Ammonium nitrate fertilisers
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C1/00—Ammonium nitrate fertilisers
    • C05C1/02—Granulation; Pelletisation; Stabilisation; Colouring
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C5/00—Fertilisers containing other nitrates
    • C05C5/02—Fertilisers containing other nitrates containing sodium or potassium nitrate
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C5/00—Fertilisers containing other nitrates
    • C05C5/04—Fertilisers containing other nitrates containing calcium nitrate
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/50—Agglomerated particles

Definitions

  • the invention concerns production of nitrate-containing products (fertilizers, technical products) from undercooling melts.
  • the CN melt In order to use devices like centrifugal or nozzle prilling equipment or pan/ drum granulators, the CN melt has to have compositions that contain 5-8 weight % ammonium nitrate (AN).
  • AN ammonium nitrate
  • the object of the invention is to obtain a method to produce high quality solid CN-water particles easily, in large quantities. Another object is to obtain a production method that could be applied generally for nitrate containing salts that very often tend to form super cooling melts.
  • the invention thus concerns a method for the production of nitrate containing products (fertilizers, technical products) from undercooling melts, wherein a XN - water solution is evaporated up to a content of 50-99.8 weight % XN, where X is one or more selected from Ca, Mg, NEU, Na and K, and N means nitrate.
  • XN is one or more selected from Ca, Mg, NEU, Na and K
  • N means nitrate.
  • the preferred range of XN is 70-99.5 weight %.
  • the melt is cooled down to and kept at a temperature at or below the crystallisation point and finely divided solid XN powder consisting of the equilibrium phases is added to the melt. Melt drops are then formed and allowed to cool and solidify during up to 70 seconds, preferably 20-70 seconds. It is preferred to use a cooling belt for solidification of the particles.
  • the belt is cooled by air, water, oil or another medium.
  • the melt temperature is preferably kept 0-10°C below the crystallization point of the melt.
  • CN*2H 2 O and CN *3H 2 O are used as seed particles.
  • the particles formed have a particle size between 0,2 and 0,8 mm, preferably between 0,4 and 0,6 mm.
  • Particles could be made from a melt consisting of 74 weight % calcium nitrate, 14 weight % potassium nitrate and 12 weight % water.
  • Solid particles can also be produced consisting of a homogenous mixture of nitrates, chlorides and crystal water. An example of this is particles made from a melt consisting essentially of 50 weight % calcium nitrate, 4 weight % ammonium nitrate, 26.5 weight % calcium chloride and 18-20 weight % water.
  • Example 1 Granules CN-water solutions were evaporated to above 70, 75 and 78 weight % CN .
  • Example 2 Prills Melts with the CN concentrations mentioned above, were kept at temperatures close to the crystallization point given by the literature. Finely crushed NH-CN were mixed into the melt subsequent to pumping the melt at high pressure to nozzles where drops were formed and allowed to cool down to 20°C for 5-10 seconds. As cooling medium oil and air were tried. Solid particles did not form due to undercooling.
  • melt-droplets turned into slurries with no particle strength as they cooled down.
  • Trial 3 CN melt having 23 weight % water and 77 weight % CN were allowed to cool on a plate for 48 hours at 20°C. A white solid material was formed during this time
  • melt composition was 25 weight %/ 75 weight % and 21.5 weight %/ 78,5 weight % (H 2 O/CaN).
  • Trial 5 Same procedure as in Trial 4, after reducing the temperature of the melt (23% weight % H O/77% weight % CN) to approximately 45°C the finely divided solid material was mixed in as seeding particles. As crystals started to form in the beaker, drops were allowed to fall on the cooling plate and simultaneously pure melt (23 weight %l 11 weight %) with temperature below 50°C was added to the beaker, while stirring.
  • Trial 5 in Example 3 was repeated by replacing CN melt with 1: MgN-water melt having composition 67 weight % MgN and 33 weight % H 2 O (boiling point 180 °C) and 2: MgN- water melt with composition 58 weight % MgN and 42 weight %(boiling point 155°C). Both melt 1 and 2 were cooled down to 30°C by procedure mentioned in trial 5 (Example 3). Letting composition 1 and 2 solidify in an exsiccator for 3 days, and then crush the solids formed into a fine powder made seeding material.
  • MgN*4H 2 O and MgN *6H 2 O were made also without seeding material as the MgN*6H 2 O melt very easily solidified.
  • Example 6 Making pastilles of MgN- AN and CN
  • a melt consisting of 67 weight % CN, 4.0 weight % AN, 10 weight % MgN and 20 weight % water was held at 110°C.
  • the melt was cooled down to 65°C and seeding material thoroughly mixed in as drops were allowed to fall on a cold metal plate.
  • Example 7 Mixture of CN , AN and CaCb
  • a melt consisting of 50 weight % CN, 4 weight % AN, 26.5 weight % CaCl 2 and 18-20 weight % water was made by melting a mixture of NH-CN and CaCl 2 *2H 2 O (130-140°C).
  • a melt consisting of 74 weight % CN, 14 weight % KN and 12 weight % water was made by evaporating water from a CN -KN -H 2 O solution.
  • the melt temperature was reduced to 86°C, app. 5-6°C above crystallization point.
  • 3 weight % finely grained seed material was thoroughly mixed in and droplets allowed falling on to a cold metal plate (23°C).
  • the right seeding material was made by letting the melt composition crystallise in an exsiccator over 2-3 days and then grind to powder the solid formed.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Fertilizers (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

The invention concerns a method for the production of nitrate containing products (fertilizers, technical products) from undercooling melts, wherein a XN - water solution is evaporated up to a content of 50-99.8 weight % XN, where X is one or more selected from Ca, Mg, NH4, Na and K, and N means nitrate. The preferred range of XN is 70-99.5 weight %. The melt is cooled down to and kept at a temperature at or below the crystallisation point and finely divided solid XN powder consisting of the equilibrium phases is added to the melt. Melt drops are then formed and allowed to cool and solidify during up to 70 seconds. It is preferred to use a cooling belt for solidification of the particles. The belt is cooled by air, water, oil or another medium.

Description

"Method for production of nitrate-containing products from undercooling melts"
The invention concerns production of nitrate-containing products (fertilizers, technical products) from undercooling melts.
Pure CN (Ca(NO3)2 ) melts at 560°C and this very high temperature is inconvenient for particulation. In order to use devices like centrifugal or nozzle prilling equipment or pan/ drum granulators, the CN melt has to have compositions that contain 5-8 weight % ammonium nitrate (AN). Today, all prilled or granulated CN contains this amount of AN in addition to 14-16 weight % water (crystal water). If the ammonium nitrate content is removed from the melt, the composition undercooles to such an extent that prilling/ granulation is not possible.
There is still a need for CN without AN and it is desirable to find methods to produce CN- water solid easily, in large quantities.
From British Patent No. 392 531 it is known a process for production of distributable and non-caking fertilizers containing calcium nitrate. According to this patent, a calcium nitrate/water solution is evaporated to a sandy-pasty consistency in which it contains about 90-95 weight % calcium nitrate (calculated as anhydrous calcium nitrate). Thereafter the concentrated product is converted without any substantial further concentration, into granular form by mechanical disaggregation in bulk at a temperature of 50-100°C. This method gives salt deposits on equipment and a flaked, dusty product. The method is therefore considered not well suited for large-scale production of CN.
From a CN -water solution CN* 4H20 crystals can be obtained in crystallization processes well described in the literature. Such crystals are available in the markets. Such crystals contain 69-70 weight % CN, but normally they have a high caking tendency and over time they become hard and difficult to handle. Thus, it is not desirable to make a crystalline material. By mapping the phase diagram (from Gmelin) of the system CN-AN -Water, it has been possible to find a rather narrow melt composition region that can be particulated with ordinary plant equipment and today granulated or prilled CN contains 77-80 weight % CN, 5-8 weight % AN and 15-17 weight % water.
By studying the phase diagram of CN -water (Fig. 1) it can be seen that the following solid compounds can be formed in the system:
Ca(NO3)*4H2O Ca(NO3)*3H2O Ca(NO3)*2H2O Ca(NO3)2
Further, it can be realized that according to the CN- water system, all CN concentrations above 70 weight % should solidify, meaning that all liquid should have disappeared at equilibrium if temperature is below 40-43°C. Further, it can be seen that by cooling a CN- water solution with CN less than 70 weight %, CN *4H2O crystals will be formed.
The object of the invention is to obtain a method to produce high quality solid CN-water particles easily, in large quantities. Another object is to obtain a production method that could be applied generally for nitrate containing salts that very often tend to form super cooling melts.
These and other objects of the invention are obtained with the method as described below, and the invention is further defined and characterised by the accompanying patent claims.
The invention thus concerns a method for the production of nitrate containing products (fertilizers, technical products) from undercooling melts, wherein a XN - water solution is evaporated up to a content of 50-99.8 weight % XN, where X is one or more selected from Ca, Mg, NEU, Na and K, and N means nitrate. The preferred range of XN is 70-99.5 weight %. The melt is cooled down to and kept at a temperature at or below the crystallisation point and finely divided solid XN powder consisting of the equilibrium phases is added to the melt. Melt drops are then formed and allowed to cool and solidify during up to 70 seconds, preferably 20-70 seconds. It is preferred to use a cooling belt for solidification of the particles. The belt is cooled by air, water, oil or another medium.
The melt temperature is preferably kept 0-10°C below the crystallization point of the melt. When calcium nitrate particles are produced, CN*2H2O and CN *3H2O are used as seed particles. The particles formed have a particle size between 0,2 and 0,8 mm, preferably between 0,4 and 0,6 mm. Particles could be made from a melt consisting of 74 weight % calcium nitrate, 14 weight % potassium nitrate and 12 weight % water. Solid particles can also be produced consisting of a homogenous mixture of nitrates, chlorides and crystal water. An example of this is particles made from a melt consisting essentially of 50 weight % calcium nitrate, 4 weight % ammonium nitrate, 26.5 weight % calcium chloride and 18-20 weight % water.
Several experiments were carried out in order to try to make particles of the melts.
Example 1 - Granules CN-water solutions were evaporated to above 70, 75 and 78 weight % CN .
The various melts were sprayed onto a rotating laboratory pan granulator containing solid NH-CN (calcium nitrate from Norsk Hydro ASA) in various ratios and at various temperatures.
None of the trials succeeded as the liquid/melt did not solidify. The whole matrix (solid CN+melt) turned into a sticky slurry that could not be processed with liquid/solid ratios within acceptable limits
Example 2 - Prills Melts with the CN concentrations mentioned above, were kept at temperatures close to the crystallization point given by the literature. Finely crushed NH-CN were mixed into the melt subsequent to pumping the melt at high pressure to nozzles where drops were formed and allowed to cool down to 20°C for 5-10 seconds. As cooling medium oil and air were tried. Solid particles did not form due to undercooling.
Example 3 - Making pastilles
Trial 1:
Droplets of CN-melts with CN concentrations above 70, 75 and 78 weight % pure CN where allowed to cool on a chilled metal plate down to 10°C for several minutes. The melt-drops turned into viscous, sticky liquid, solid particles did not form.
Trial 2:
Same procedure as above but now finely divided solid CN powder was added to the melt before setting the droplets on the plate. Solids of NH-CN and crushed CN*4H2O crystals were applied.
The melt-droplets turned into slurries with no particle strength as they cooled down.
Trial 3: CN melt having 23 weight % water and 77 weight % CN were allowed to cool on a plate for 48 hours at 20°C. A white solid material was formed during this time
Now clearly the melt had turned into a strong solid material over these hours and X-ray analysis showed that the material consisted of CN*2H2O and CN 3*H2O.
However, the solidifying time was too long for a convenient particulation process.
Trial 4a:
Same procedure as in trial 1, but now a CN-melt consisting of 23 weight % water and 77 weight % CN was cooled down to 50-55°C and 2 weight % crushed material from trial 3 was thoroughly mixed into the melt. As the drops cooled, crystals were formed and during 30-70 second hard pastilles were formed with particle strength above 1 kg. As time passed, particle strength became substantially higher.
Particles did form with this procedure and the crucial part of this procedure was obviously to add finely divided solid material consisting of the equilibrium phases of the system at room temperature (CN*2H2O and CN *3H2O).
Trial 4b:
Same procedure as trial 4a but now melt composition was 25 weight %/ 75 weight % and 21.5 weight %/ 78,5 weight % (H2O/CaN).
Trial 5: Same procedure as in Trial 4, after reducing the temperature of the melt (23% weight % H O/77% weight % CN) to approximately 45°C the finely divided solid material was mixed in as seeding particles. As crystals started to form in the beaker, drops were allowed to fall on the cooling plate and simultaneously pure melt (23 weight %l 11 weight %) with temperature below 50°C was added to the beaker, while stirring.
In this way drops containing solid crystals with the right composition were continuously formed and solidified on the metal plate just by adding one portion of solid material to make the crystallization start.
However, 40-70 seconds are too long time for using a granulation or prilling technique with an acceptable recycling ratio.
To use procedure 5 for producing large quantities of particles, a way of obtaining 40-70 second crystallization time was looked for. Example 4 - Making CN pastilles in industrial scale
Experiments were carried out on a moving steel cooling belt (as described in US patent No. 5326541) that is kept at a low temperature by using water as cooling agent. On this belt a rotating drum with nozzles, supply drops that can solidify on the belt. A plant test was carried out with CN melt (23 weight %/ 77 weight %).
By using procedure described in "Trial 5", several hundred kg of CN particles (pastilles ) were produced on the cooling belt.
Example 5 - Making MgN pastilles
Trial 5 in Example 3 was repeated by replacing CN melt with 1: MgN-water melt having composition 67 weight % MgN and 33 weight % H2O (boiling point 180 °C) and 2: MgN- water melt with composition 58 weight % MgN and 42 weight %(boiling point 155°C). Both melt 1 and 2 were cooled down to 30°C by procedure mentioned in trial 5 (Example 3). Letting composition 1 and 2 solidify in an exsiccator for 3 days, and then crush the solids formed into a fine powder made seeding material.
With melt 1 and 2 and the procedure described we obtained MgN*4H2O and MgN *6H2O respectively. MgN*6H2O was made also without seeding material as the MgN*6H2O melt very easily solidified.
Example 6 - Making pastilles of MgN- AN and CN
A melt consisting of 67 weight % CN, 4.0 weight % AN, 10 weight % MgN and 20 weight % water was held at 110°C. The melt was cooled down to 65°C and seeding material thoroughly mixed in as drops were allowed to fall on a cold metal plate.
During 60 seconds on the plate hard pastilles were formed. Letting the melt composition crystallize in an exsiccator for 2-3 days and then grinding to a fine powder made seeding material. Example 7 - Mixture of CN , AN and CaCb
A melt consisting of 50 weight % CN, 4 weight % AN, 26.5 weight % CaCl2 and 18-20 weight % water was made by melting a mixture of NH-CN and CaCl2*2H2O (130-140°C).
By using procedure described in 4 b (seeding material added at 120°C) nice particles were formed within 30 seconds on a cold steel plate. The particles consisted of homogenously solidified CaN-AN CaCl2 particles.
Example 8 - Mixture of CN and KN
A melt consisting of 74 weight % CN, 14 weight % KN and 12 weight % water was made by evaporating water from a CN -KN -H2O solution. The melt temperature was reduced to 86°C, app. 5-6°C above crystallization point. 3 weight % finely grained seed material was thoroughly mixed in and droplets allowed falling on to a cold metal plate (23°C).
During 50-60 seconds hard pastilles/particles formed on the plate.
The right seeding material was made by letting the melt composition crystallise in an exsiccator over 2-3 days and then grind to powder the solid formed.
Thus, by applying:
- correct melt or CN-water composition
- correct temperature of the melt (at or below cryst. point)
- correct seeding material (consits of equilibrium phases of the solidifying material) - a cooling belt or a similar system that allows 20-70 seconds or more for crystallization,
it has been possible to find a procedure for producing solid CN particles (CN+crystal water) without AN. The procedure can be applied for making solids of several nitrate systems containing Ca, Mg, K, Na, NFLj or mixtures of these nitrates or mixtures of nitrates and chlorides.

Claims

Patent claims
1. Method for the production of nitrate containing products (fertilizers, technical products) from undercooling melts, wherein a XN - water solution is evaporated up to a content of 50-99.8 weight % XN, where X is one or more selected from Ca, Mg, Nt- , Na and K, N is nitrate, the melt is cooled down to and kept at a temperature at or below the crystallisation point, finely divided solid XN powder consisting of the equilibrium phases is added to the melt, where after melt drops are formed and allowed to cool and solidify during up to 70 seconds.
2. Method according to claim 1 , wherein the content of XN is 70-99.5 weight %.
3. Method according to claim 1, wherein a cooling belt is used for solidification of the particles.
4. Method according to claim 3, wherein the belt is cooled by air, water oil or another medium.
5. Method according to claim 1, wherein the melt drops are cooled and solidified during 20-70 seconds.
6. Method according to claim 1, wherein the temperature is kept preferably 0-10°C below starting crystallization point of the melt.
7. Method according to claim 1, wherein calcium nitrate is produced and CN*2H2O and CN *3H2O are used as seed particles.
8. Method according to claim 1, wherein particles are formed with particle size between 0.2 and 0.8 mm, preferably between 0.4 and 0.6 mm.
9. Method according to claim 1, wherein particles are made from a melt consisting of 74 weight % calcium nitrate, 14 weight % potassium nitrate and 12 weight % water.
10. Method according to claim 1, wherein solid particles consisting of a homogenous chemical mixture of nitrates, chlorides and crystal water were produced.
11. Method according to claim 10, wherein solid particles are made from a melt consisting essentially of 50 weight % calcium nitrate, 4 weight % ammonium nitrate, 26.5 weight % calcium chloride and 18-20 weight % water.
PCT/NO2002/000400 2002-11-01 2002-11-01 Method for production of nitrate-containing products from undercooling melts WO2004039722A1 (en)

Priority Applications (28)

Application Number Priority Date Filing Date Title
UAA200505207A UA80163C2 (en) 2002-11-01 2002-01-11 Process for obtaining of nitrate containing products from undercooled melts
SI200220044A SI21742A (en) 2002-11-01 2002-11-01 Method for production of nitrate-containing products from undercooling melts
CA002503842A CA2503842C (en) 2002-11-01 2002-11-01 Method for production of nitrate-containing products from undercooling melts
MXPA05004624A MXPA05004624A (en) 2002-11-01 2002-11-01 Method for production of nitrate-containing products from undercooling melts.
CNB028298349A CN1307090C (en) 2002-11-01 2002-11-01 Method for prodn, of nitrate-Containing products from undercooling metals
PT02778107T PT1556308E (en) 2002-11-01 2002-11-01 METHOD FOR PRODUCING PRODUCTS CONTAINING NITRATES FROM OVERFLOW MELTING
AU2002339757A AU2002339757B9 (en) 2002-11-01 2002-11-01 Method for production of nitrate-containing products from undercooling melts
NZ539890A NZ539890A (en) 2002-11-01 2002-11-01 Method for production of nitrate-containing products from undercooling melts
SK5036-2005A SK287778B6 (en) 2002-11-01 2002-11-01 Method for production of nitrate containing products from under-cooled melts
BRPI0215929-5A BR0215929B1 (en) 2002-11-01 2002-11-01 method for the production of nitrate products (fertilizers) from subcooling fusions.
AT02778107T ATE324352T1 (en) 2002-11-01 2002-11-01 METHOD FOR PRODUCING NITRATE CONTAINING PRODUCTS FROM SUPERCOOLING MELTS
ROA200500397A RO121775B1 (en) 2002-11-01 2002-11-01 Process for producing nitrate-containing products from undercooling melts
ES02778107T ES2261746T3 (en) 2002-11-01 2002-11-01 PROCEDURE FOR THE PRODUCTION OF PRODUCTS CONTAINING NITRATE FROM SUB-COOLED GROUNDED MASSES.
DE60211039T DE60211039T2 (en) 2002-11-01 2002-11-01 PROCESS FOR PRODUCING NITRATE-CONTAINING PRODUCTS FROM UNDER COOLING MELTS
PCT/NO2002/000400 WO2004039722A1 (en) 2002-11-01 2002-11-01 Method for production of nitrate-containing products from undercooling melts
DK02778107T DK1556308T3 (en) 2002-11-01 2002-11-01 Method for making nitrate-containing products from undercooled melting agents
EA200500754A EA008385B1 (en) 2002-11-01 2002-11-01 Method for production of nitrate-containing products from undercooling melts
US10/533,417 US7500995B2 (en) 2002-11-01 2002-11-01 Method for production of nitrate-containing products from undercooling melts
EP02778107A EP1556308B1 (en) 2002-11-01 2002-11-01 Method for production of nitrate-containing products from undercooling melts
JP2004548172A JP4435689B2 (en) 2002-11-01 2002-11-01 Process for producing nitrate-containing products from undercooled melts
HU0500835A HU230118B1 (en) 2002-11-01 2002-11-01 Method for production of nitrate-containing products from undercooling melts
CZ2005-315A CZ306507B6 (en) 2002-11-01 2002-11-01 A method of manufacturing products containing nitrates from undercooled melts
EG2003101006A EG23430A (en) 2002-11-01 2003-10-28 Method for production of nitrate-containing products from undercooling melts.
NO20051857A NO20051857L (en) 2002-11-01 2005-04-15 Process for producing nitrate-containing products from undercooling melts
IL168185A IL168185A (en) 2002-11-01 2005-04-21 Method for production of nitrate-containing products from undercooling melts
BG109137A BG66487B1 (en) 2002-11-01 2005-04-26 Method for production of nitrate-containing products from undercooling melts
HRP20050374AA HRP20050374B1 (en) 2002-11-01 2005-04-27 Method for production of nitrate-containing products from undercooling melts
CY20061100952T CY1105077T1 (en) 2002-11-01 2006-07-07 METHOD FOR PRODUCING PRODUCTS WHICH COMPRESS NITRATE FROM LOW TEMPERATURE MELTS FROM MELTING TEMPERATURE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NO2002/000400 WO2004039722A1 (en) 2002-11-01 2002-11-01 Method for production of nitrate-containing products from undercooling melts

Publications (1)

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WO2004039722A1 true WO2004039722A1 (en) 2004-05-13

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PCT/NO2002/000400 WO2004039722A1 (en) 2002-11-01 2002-11-01 Method for production of nitrate-containing products from undercooling melts

Country Status (28)

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US (1) US7500995B2 (en)
EP (1) EP1556308B1 (en)
JP (1) JP4435689B2 (en)
CN (1) CN1307090C (en)
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WO2015197595A1 (en) 2014-06-23 2015-12-30 Yara International Asa Method for producing anhydrous calcium nitrate powder
WO2017178342A1 (en) * 2016-04-14 2017-10-19 Yara International Asa Particulate calcium nitrate composition for fertigation comprising nitrate-based micronutrients and method for production thereof
EP3348538A1 (en) 2017-01-16 2018-07-18 YARA International ASA Calcium nitrate and potassium nitrate fertiliser particles

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NO20131471A1 (en) * 2013-11-05 2015-05-06 Yara Int Asa Solid mortar accelerator accelerator, process for producing such mortar accelerator, dry mortar mix and mortar paste
DE102014217603A1 (en) * 2014-09-03 2016-03-03 Sandvik Materials Technology Deutschland Gmbh Process and apparatus for producing L-menthol in solid form

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GB510053A (en) * 1937-08-04 1939-07-26 Azogeno Soc Anonima Process for the crystallisation of alkaline earth metal nitrates
GB768040A (en) * 1953-11-05 1957-02-13 Norsk Hydro Elek Sk Kvelstofak Improvements in or relating to the crystallisation of nitrates from nitric acid solutions of calcium phosphate
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WO2012007331A1 (en) * 2010-07-16 2012-01-19 Sandvik Materials Technology Deutschland Gmbh Method for producing tablets containing ammonium nitrate
US9366485B2 (en) 2010-07-16 2016-06-14 Sandvik Materials Technology Deutschland Gmbh Method for producing tablets containing ammonium nitrate
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WO2017178342A1 (en) * 2016-04-14 2017-10-19 Yara International Asa Particulate calcium nitrate composition for fertigation comprising nitrate-based micronutrients and method for production thereof
EP3348538A1 (en) 2017-01-16 2018-07-18 YARA International ASA Calcium nitrate and potassium nitrate fertiliser particles
WO2018130677A1 (en) 2017-01-16 2018-07-19 Yara International Asa Calcium nitrate and potassium nitrate fertiliser particles
CN111108078A (en) * 2017-01-16 2020-05-05 亚拉国际有限公司 Calcium nitrate and potassium nitrate fertilizer particles
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US12103896B2 (en) 2017-01-16 2024-10-01 Yara International Asa Calcium nitrate and potassium nitrate fertiliser particles

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