Fluid Fertilizers: Properties and Characteristics · 2016-09-02 · Fluid Fertilizers: Properties...
Transcript of Fluid Fertilizers: Properties and Characteristics · 2016-09-02 · Fluid Fertilizers: Properties...
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Fluid Fertilizers: Properties and
Characteristics
Dale F. Leikam
Fluid Fertilizer Foundationwww.FluidFertilizer.com
785-776-0273
785-770-0009
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Fluid Fertilizers
Increasing in popularity in U.S. and elsewhere Advantages include Flexibility and versatility in application Efficiency and adaptability Potential benefits of continuous bands Ease of handling Does not segregate Etc.
Limitations Generally higher purchase cost than solid fertilizers Salt-out and precipitate formation potential with
certain products and blends
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USA N fertilizer consumption by product.
Data source: Commercial Fertilizers, AAPFCO & TFI
0
2
4
6
8
10
12
1965 1970 1975 1980 1985 1990 1995 2000 2005 2010
Millio
n to
nn
es N
Total
Ammonia
Urea*Solutions*
Ammon. nitr.*
*Blended multi-nutrient materials excluded
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USA P fertilizer market share.
Data source: Commercial Fertilizers, AAPFCO & TFI
0
10
20
30
40
50
60
70
80
90
1965 1970 1975 1980 1985 1990 1995 2000 2005 2010
Ma
rke
t sh
are
, %
DAP
MAP APPTSP
Others (includes mixed fertilizers)
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Fluid Fertilizers
Terminology, Solubility, Density and N Solutions
Solution – All salts totally dissolved in water. No solids allowed!
Slurry – Fluid product containing water, dissolved salts and
undissolved salts. Settles out quickly. Not Common.
Suspension – Fluid product containing water, dissolved salts,
fine undissolved salt crystals and a suspending agent – normally
attapulgite clay.
Muddy Water – Solutions with undissolved solids or suspensions containing too
few undissolved salt crystals. Not a good range to try and operate in!!.
Falling Out Of Solution – No such thing.
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Salt-Out – Crystals form as solution cools; goes
back in solution as product is warmed.
Example; UAN Solution.
Precipitate Formation – Non-crystalline mass
forms which has much lower solubility than
original ingredients in solution. Example;
Improperly stored fluid phosphates
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Urea Solutions
0
10
20
30
40
50
60
70
80
0 2 4 6 8 10 12 14 16 18 20 22 24
Percent N
Sa
lt-O
ut
(F)
8.0
8.3
8.6
8.9
9.2
9.5
9.8
De
ns
ity
(L
b/G
al)
Salt Out (F) Lbs/Gal.
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Ammonium Nitrate Solutions
0
10
20
30
40
50
60
70
80
90
0 2 4 6 8 10 12 14 16 18 20 22 24
Percent N
Sa
lt-O
ut
(F)
8.0
8.4
8.8
9.2
9.6
10.0
10.4
10.8
11.2
11.6
De
ns
ity
(L
b/G
al)
Salt Out (F) Lbs/Gal.
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Eutectic Point – point of maximum solubility
32% UAN contains:
• approximately 35% ammonium nitrate, 45% urea and 20% water at eutectic point
28% UAN contains 30% water
Urea - Ammonium Nitrate Solutions(32 degree F saltout)
0
10
20
30
40
50
60
70
80
90
100
40:0 40:10 40:20 38:30 37:40 35:45 30:46 20:48 10:51 0:53
Urea - Ammonium Nitrate Ration
% M
ate
ria
l
14
16
18
20
22
24
26
28
30
32
34
% N
Amm. Nitrate
Urea
% N
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Urea - Ammonium Nitrate Solutions
-20
-10
0
10
20
30
40
50
60
0 4 8 12 16 20 24 28 32
Percent N
Sa
lt-O
ut
(F)
8.0
8.4
8.8
9.2
9.6
10.0
10.4
10.8
11.2
11.6
De
ns
ity
(L
b/G
al)
Salt Out (F) Lbs/Gal.
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UAN Solutions
Amm. Nitrate
14 F
14 F- 4 F
32 F
50 F
68 F
86 F
- 16 F
100 % Amm. Nit.
Water 100%
Urea 100%
10%
20%
30%
40%
50%
60%
70%
80%
90%
10% 20% 30% 40% 50% 60% 70%
80%
90%
10%
20%
30%
40%
50%
60%
70%
80% 90%
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UAN Solution
Salt-out is an issue in many environments
There is very little water in UAN solution. Warm water has ability to dissolve more salts than
cold water
Salt-out occurs when salt content exceeds solubility at a given product temperature
Crystals form on tank walls as temperature cools
Eventually salts accumulate at tank bottom
Salts will re-dissolve with sufficient heat and recirculation
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Lowering Water Freezing Temperature With UAN Soulution
Freezing
Temperature F% N 28-0-0 32-0-0
gal per 100 gal water
0 32 0 0
2 27 6.1 5.2
4 23 13.1 11.2
6 18 21.5 18.2
8 14 31.5 26.2
10 9 43.7 35.6
12 5 59.0 47.2
14 0 78.7 61.2
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Liquid Phosphate Products
Fluid Phosphate Products and Characteristics
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Phosphoric AcidWet-Process Acid
• Black, brown, green (calcined)• Contains many rock impurities• Used in fertilizer industry
Furnace, food-grade acid• Clear• No impurities• Food and industrial processes
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Orthophosphoric Acid
Examples
Source
P2O5
MgO
Fe2O3
Al2O3
F
Solids
Visc.@100F
P/F
Acid 4
57
0.2
0.32
0.16
0.1
Nil
27
248
Acid 1
61
0.3
0.35
0.18
0.3
0.5
40
89
Acid 2
53.2
1.2
0.5
0.4
0.4
0.1
90
58
Acid 3
52.8
1.1
1
0.5
2.1
0.1
100
46
Source: Texas Gulf
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Ammonium Polyphosphate
Primary P source for much of fluid industry Most NPKS products made from APP Produced from ammonia, superphosphoric acid
and water Generally equal agronomic performance as
compared to solid fertilizers If applied at equal P rates in similar manner Potentially superior to solids if discontinuous bands
result from with solid fertilizer band applications
Contains most P as polyphosphatePolyphosphates and orthophosphates are considered
agronomically equal
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Heat links phosphates
by removing
chemically bound
water
Heat comes from
chemical reaction of
reacting phosphoric
acid with ammonia
=HO P OH
O
O
H
==
==HO P OH
O
O
H
==
==HO P OH
O
O
H
==
==HO P OH
O
O
H
==
=
=HO P OH
O
O
H
==
==HO P OH
O
O
H
==
==HO P OH
O
O
H
==
==HO P OH
O
O
H
==
=
H2O H2OH2O
=HO P
O
O
H
==
= =O P
O
O
H
==
= =O P
O
O
H
==
= =O P OH
O
O
H
==
=
Ortho
Pyro
Tri
Higher
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Flow Diagram For Ammonium Polyphosphate Production10-34-0 & 11-37-0
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Why Do We Want Polyphosphates ?
Not necessarily for agronomic reasons
Manage sludge problems in fluid P products Polyphosphates sequester metal cation impurities in
the product (especially Mg) to form relatively insoluble precipitates
Provides superior storage qualities
Increased analysis compared to orthophosphate
Provides ability to include higher amounts of micronutrients in product (not Ca or Mg)
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Hydrolysis Of Polyphosphate To Orthophosphate
24 Hour Polyphosphate
Soil Temperature Hydrolysis (%)
41 F 30-40 %
68 F 50-60 %
95 F 80-90 %
Chang and Racz, 1977
After application to soils, polyphosphate is quickly converted to orthophosphate by
abundant soil enzymes
Plants utilize orthophosphates
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Effect of Poly Content and N:P2O5 Ratio On Solubility
0.28 0.29 0.30 0.31 0.32 0.33 0.34
Perc
en
t To
tal
N +
P2O
5 C
on
ten
t
35
49
47
45
43
41
39
37
70% Poly
45% Poly
0% Poly
N:P2O5 Weight Ratio
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Factors Impacting Precipitate Formation In Storage
Amount of polyphosphate initially present
Amount of impurities in super-acid
Other ‘impurities’ added to product Zinc Previous product sludge
Temperature of stored product
Length of time product stored
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APP Storage and Housekeeping Suggestions
Do not store longer than necessary
Avoid storage in summer months
Completely empty and clean tanks regularly
Know the quality of remaining product before adding additional product to tanks
Do not contaminate with products/impurities that may affect storage properties
Never mingle any calcium or magnesium with product or mix plant
Make sure that farmers and dealers lines, tanks and equipment are completely cleaned after use
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• Final maximum grade May Contain 31 Total Plant Food Units.
N = 25% of 31 = .25 X 31 = 7.75% N
P2O5 = 50% of 31 = .50 X 31 = 15.5% P2O5
K2O = 25% of 31 = .25 X 31 = 7.75% K2O
100 % K2O
P2O5 100%
K2O
N 100%
10%
20%
30%
40%
50%
60%
70%
80%
90%
10% 20% 30% 40% 50% 60% 70%
80%
90%
10%
20%
30%
40%
50%
60%
70%
80% 90%
1515
17
17
19
21
23
25
2729
31
3335
39
41
4345
37
4
7
4
9
70 % Poly
15
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N:P2O5:K2O RatioSolution Analysis
(32 F Saltout)
Solution Grades For UAN Solution (28-32% N), Potassium Chloride
(0-0-62) and Ammonium Polyphosphate (10-34-0, 11-37-0) System
N:P2O5:K2O RatioSolution Analysis
(32 F Saltout)
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Typical Characteristics Of Several Fluid Fertilizer Products
Source Analysis Density Salt-Out General Comments
N-P2O5-K2O Lbs/gal º F
UAN 28-0-0 10.67 0 ~ 30% water
UAN 32-0-0 11.06 28 - 32 ~ 20% water
ATS 12-0-0-26S 11.04 <20 Fluid S Source of Choice
APP 10-34-0 11.65 <10 11-37-0 grade also
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Temperature Effect On Fluid Fertilizers Density
10.4
10.6
10.8
11
11.2
11.4
11.6
11.8
12
20 30 40 50 60 70 80 90 100
Estimated Density (lb/gal)
Pro
du
ct
Te
mp
era
ture
28-0-0
32-0-0
10-34-0
Product
Temperature 28-0-0 32-0-0 10-34-0
20 10.78 11.17 11.76
30 10.76 11.14 11.74
40 10.73 11.12 11.72
50 10.7 11.09 11.7
60 10.67 11.05 11.68
70 10.64 11.02 11.66
80 10.61 10.99 11.64
90 10.58 10.95 11.62
100 10.55 10.92 11.6
- - - lb / gal - - -
Estimated Density Of Fluid Products
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Salt-out – Crystals form as solution cools; goes back in solution
as product is warmed. Example; UAN Solution.
Precipitate formation – Non-crystalline mass forms which has
much lower solubility than original ingredients in solution.
Example; Improperly stored fluid phosphates
Heat generator – Generates chemical heat when producing
solutions. Examples; ammonia + phosphoric acid; dilution of
sulfuric acid)
Fume generator – Generates fumes which can be safety
hazard. Example; UAN solution + Potassium carbonate
ammonia fumes.
2NH4NO3 + K2CO3 2KNO3 + (NH4)2CO3
2NH3 + H2CO3
H2O + CO2UAN in Irrigation Water ?
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Caution: This chart contains information based on the opinions
of people in the fluid fertilizer industry. This information has been
compiled as a general guide only. Neither the Fluid Fertilizer
Foundation or contributors guarantee the accuracy of the information.
Please refer to manufacturer/supplier product information and also
Perform a small jar compatibility test prior to final mixing.
'Compatible', results in relatively stable mixture.
FluidFertilizer.com 'Limited Compatibility', generally compatible within solubility limits.
'Very Limitied Compatibility', generally unsuitable mixtures.
Anhydrous Ammonia 'Incompatible', unsuitable mixture and/or hazardous combination.
Aqua Ammonia; 20-0-0 ∆ ∆ Significant heat generated.
Urea Soln; 23-0-0 ∆
Ammonium Nitrate Soln; 20-0-0 ∆
Urea Ammonium Nitrate Soln; UAN 28/32-0-0 ∆
Ammonium Sulfate Soln; 8-0-0-9S ∆ ∆
Ammonium Polyphosphate Soln; 10-34-0 ∆ ∆
Ammonium Chloride Soln; 6-0-0-16Cl ∆
Ammonium Thiosulfate Soln; 12-0-0 26S ∆
Potassium Thiosulfate; KTS 0-0-25-17S
Calcium Thiosulfate; CaTS, 6%Ca 10%S ?
Magnesium Thiosulfate; MgTS, 10%S 4%Mg ? `
Calcium-Ammonium Nitrate Soln; 17-0-0 8.8Ca
Calcium Nitrate Soln; 9% N, 11% Ca ?
Potassium Carbonate Soln; 0-0-32 ?
N-pHuric 28/27; 28-0-0 9S ∆
N-pHuric 15/49; 15-0-0 16S ∆
N-pHuric 10/55; 10-0-0 18S ∆
Water ∆ ```
Nitric Acid ∆ ∆ ∆ ∆ ∆ ∆ ∆
Phosphoric Acid (white) ∆ ∆ ∆ ∆ ∆ ∆ ∆
Phosphoric Acid (green) ∆ ∆ ∆ ∆ ∆ ∆ ∆
Sulfuric Acid ∆ ∆ ∆ ∆ ∆ ∆
Urea; 46-0-0 ∆ ∆ ∆ ∆
Ammonium Nitrate; 34-0-0 Dry
Calcium Nitrate; 15.5-0-0-19Ca Dry Dry
Potassium Chloride; 0-0-62 Dry Dry Dry
Potassium Nitrate; 13-0-46 ? Dry Dry Dry Dry
Magnesium Nitrate; 10%N 9%Mg ? Dry Dry Dry Dry Dry
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Fluid Fertilizer Foundation
2805 Claflin Road, Suite 200
Manhattan, KS 66502
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785-776-0273
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Thank You And Enjoy The
Conference
Dale F. Leikam
Fluid Fertilizer Foundationwww.FluidFertilizer.com
785-776-0273
785-770-0009
The Fluid Advantage