CN1088692C - Long-acting ammonium nitrate and method for preparation thereof - Google Patents
Long-acting ammonium nitrate and method for preparation thereof Download PDFInfo
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- CN1088692C CN1088692C CN97111891A CN97111891A CN1088692C CN 1088692 C CN1088692 C CN 1088692C CN 97111891 A CN97111891 A CN 97111891A CN 97111891 A CN97111891 A CN 97111891A CN 1088692 C CN1088692 C CN 1088692C
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- ammonium nitrate
- long
- dyhard
- dicyanodiamide
- acting
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C1/00—Ammonium nitrate fertilisers
- C05C1/02—Granulation; Pelletisation; Stabilisation; Colouring
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C1/00—Ammonium nitrate fertilisers
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- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The present invention relates to long acting ammonium nitrate which exists in the form of a eutectic mixture of dicyanodiamide and ammonium, and the content of the dicyanodiamide is 0.3 wt% to 4 wt% of the ammonium nitrate. In a preparation method for the ammonium nitrate, after dicyanodiamide dissolves (with water or ammonium hydroxide), the dissolved dicyanodiamide is pumped by a metering pump into a reaction vessel for synthesizing ammonium nitrate to be thoroughly mixed with reaction solution, and the present invention is prepared by that the solution after reaction is concentrated by a conventional technology and is processed through the crystallization of the dicyanodiamide and the ammonium nitrate, dewatering and drying. A fertilizer of the present invention has a long effect period, and the utilization rate of nitrogen of the present invention is higher than that of common ammonium nitrate by about 5% to 8%. Using the long acting fertilizer to replace ammonium nitrate not only can achieve the aim of increasing both production and income, but also can reduce the discharge capacity of gas which is discharged by farmland and causes atmosphere greenhouse effect. Obvious economical and social benefits can be obtained.
Description
The invention provides a kind of long-acting ammonium nitrate chemical fertilizer, specifically contain long-acting ammonium nitrate of dihydro-amine and preparation method thereof.
Ammonium nitrate is the important solid nitrogenous fertilizer of more application in the present agricultural, and the nitrogenous of it is 33.5%, is only second to urea fertilizer.Its advantage is: contained ammonia-state nitrogen and nitric nitrogen can be absorbed by crop fully, do not stay any to soil, the deleterious material of crop.But it mainly is nitrated--cause bigger NO under the denitrification
3 -Leaching loss and N
2The airborne release of O.This is the one of the main reasons that influences its application.
The applicant once proposed to adopt the interpolation Dyhard RU 100 to prepare long-acting ammonium bicarbonate chemical fertilizer (CN 1053225A) in early days, mainly contain dihydro-amine and coal-based a kind of nitrogenous fertilizer long-acting synergist (CN 1109038A) adds in bicarbonate of ammonia or the urea, the fertilizer efficiency period of chemical fertilizer can be prolonged, and the technology of the nitrogen utilization efficiency of chemical fertilizer can be improved.This technology mainly is the inhibiting nitrification effect that utilizes Dyhard RU 100 to have, and can stop the conversion process of the ammonium attitude of nitrogenous fertilizer to nitric nitrogen, reduces and reduce the leaching loss and the volatilization loss of nitrogenous fertilizer.But with the method for Dyhard RU 100, directly add in the ammonium nitrate, or nitrogenous fertilizer long-acting synergist is added in the ammonium nitrate, all can not obviously increase the fertilizer efficiency period of ammonium nitrate and improve its nitrogen utilization efficiency effectively with mechanically mixing.Have not yet to see the relevant report that improves the practical technique aspect of ammonium nitrate performance.
The objective of the invention is to solve the ammonium nitrate nitrogen and utilize low problem, a kind of long-acting ammonium nitrate and preparation method thereof is provided.The fertilizer efficiency period of this chemical fertilizer is long, and its nitrogen utilization efficiency is also than common ammonium nitrate high nearly 5～8%.Use this long-acting fertilizer to replace ammonium nitrate, not only can receive the purpose of increasing both production and income, also can reduce the quantity discharged that the farmland discharging causes the atmosphere greenhouse gases, protected physical environment.
Long-acting ammonium nitrate provided by the invention still adopts a kind of ammonium nitrate chemical fertilizer that contains Dyhard RU 100 that adds Dyhard RU 100 and obtain, and it is characterized in that Dyhard RU 100 and ammonium nitrate exist for the eutectic mixture form, and the content of Dyhard RU 100 is 0.5～5% of ammonium nitrate weight; Dyhard RU 100 and ammonium nitrate that so-called eutectic mixture form exists are in the building-up process of ammonium nitrate, and Dyhard RU 100 is joined in the reaction soln, mix, then the product that obtains after dehydration and drying.
The preparation method of concrete long-acting ammonium nitrate is as follows:
1. with after the Dyhard RU 100 dissolving (water or ammoniacal liquor), be input to volume pump in the reactor of nitric acid synthesis ammonium and the reaction soln thorough mixing;
Again routinely technology back solution concentrates to reacting, Dyhard RU 100 and ammonium nitrate cocrystallization, dehydration and drying make finished product.
Long-acting ammonium nitrate of the present invention also can be as the carrier of micronutrient element, as: boron, manganese, molybdenum, zinc etc., produce the long-acting compound ammonium nitrate that contains multiple little fertilizer.Simultaneously this long-acting ammonium nitrate also can with present production in the middle of various special-purpose fertile (nitrogenous, phosphorus, potassium) of using be mixed with long acting special compound fertilizer.Make various long acting special compound fertilizers flexibly according to the fertility level of different soils and the nutrient uptake feature of raise crop.
Below by embodiment technology of the present invention is given to illustrate further.
The preparation of embodiment 1 long-acting ammonium nitrate
In the technical process of nitric acid synthesis ammonium, set up a dissolving tank and volume pump, Dyhard RU 100 solution in the dissolving tank is quantitatively pumped in the nitric acid synthesis ammonium reactor, technology is operated and can be obtained long-acting ammonium nitrate routinely again.
The application of embodiment 2 long-acting ammonium nitrates
Utilize the preparation method of embodiment 1, when adding the amount of different Dyhard RU 100s,, under the identical condition in field, make the ammonium stability experiment obtaining containing the different ammonium nitrate of Dyhard RU 100, and with common ammonium nitrate as a comparison, its result such as table 1.
Table 1 Dyhard RU 100 content is to the influence of ammonium nitrate nitrogen utilization efficiency
Two cyanogen ammonium content NH
4 +-N increases (%) NO
3 --N increases (%)
(%) (mgKg
-1) (mgKg
-1) ammonium nitrate (0) 1212.99--635.08--long-acting ammonium nitrate (0.3%) 1256.78 0.30 840.42 32.33 long-acting ammonium nitrate (0.5%) 1281.59 2.28 1098.51 72.97 long-acting ammonium nitrate (1.0%) 1310.16 4.56 1100.12 73.22 long-acting ammonium nitrate (3.0%) 1438.53 14.81 1109.55 74.21 long-acting ammonium nitrate (5.0%) 1476.12 17.81 1212.94 90.99 long-acting ammonium nitrate (6.0%) 1479.31 18.06 1221.69 92.36
Result by table 1, when the content of Dyhard RU 100 is crossed (＜0.5%) when low, limited to the effect that improves the ammonium nitrate nitrogen utilization efficiency, and during too high levels (＞5%), can not more effective raising nitrogen utilization efficiency, and higher because of the price of Dyhard RU 100, too much use will increase the cost of long-acting ammonium nitrate chemical fertilizer, and it is 1～5% more suitable generally containing with it.
Comparative example 1 Dyhard RU 100 adds the influence of form to the ammonium nitrate nitrogen utilization efficiency
Utilize the method for embodiment 1 to prepare long-acting ammonium nitrate, the mixture with equivalent Dyhard RU 100 and ammonium nitrate obtain by the mechanically mixing method compares experiment under embodiment 2 the same terms, and it the results are shown in table 2.
Table 2 Dyhard RU 100 interpolation form is added NH to the dihydro-amine that influences of ammonium nitrate nitrogen utilization efficiency
4 +-N increases (%) NO
3 --N increases (%) amount and method (mgKg
-1) (mgKg
-1) 1. 2. synergistic agent (3%) 1276.78 1.90 817.65 28.74 of mechanically mixing (3%) 1259.00 0.48 680.12 7.09 of ammonium nitrate (0) 1252.99--635.08--long-acting ammonium nitrate (3%) 1438.53 14.81 1109.55 74.21
1. with the Dyhard RU 100 of ammonium nitrate amount 3% and ammonium nitrate mechanically mixing evenly (pressing CN 1053225A technology);
2. utilize nitrogenous fertilizer long-acting synergist (CN 1109038A technology), making the Dyhard RU 100 addition is 3% ammonium nitrate mixed fertilizer.
Result by table 2 can see in the identical various ammonium nitrate fertilizers of Dyhard RU 100 content, having the effect of the most tangible raising nitrogen utilization efficiency by the fertilizer of method preparation of the present invention.Because method provided by the invention is simple, facility investment is few, is suitable for applying simultaneously.
Claims (2)
1. a long-acting ammonium nitrate contains Dyhard RU 100, it is characterized in that Dyhard RU 100 and ammonium nitrate exist for the eutectic mixture form, and the content of Dyhard RU 100 is 0.5～5% of ammonium nitrate weight; Dyhard RU 100 and ammonium nitrate that so-called eutectic mixture form exists are in the building-up process of ammonium nitrate, and Dyhard RU 100 is joined in the reaction soln, mix, then the product that obtains after dehydration and drying.
2. according to the described long-acting ammonium nitrate of claim 1, it is characterized in that Dyhard RU 100 content is 1～5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97111891A CN1088692C (en) | 1997-07-03 | 1997-07-03 | Long-acting ammonium nitrate and method for preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97111891A CN1088692C (en) | 1997-07-03 | 1997-07-03 | Long-acting ammonium nitrate and method for preparation thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1204633A CN1204633A (en) | 1999-01-13 |
| CN1088692C true CN1088692C (en) | 2002-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97111891A Expired - Fee Related CN1088692C (en) | 1997-07-03 | 1997-07-03 | Long-acting ammonium nitrate and method for preparation thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN1088692C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100569705C (en) * | 2005-11-30 | 2009-12-16 | 中国科学院沈阳应用生态研究所 | A kind of slow-release nitro compound fertilizer and preparation method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113603557B (en) * | 2021-08-20 | 2022-10-11 | 四川金象赛瑞化工股份有限公司 | Process for co-production of dicyandiamide and ammonium nitrate nitrogen fertilizer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1136547A (en) * | 1996-01-31 | 1996-11-27 | 中国科学院沈阳应用生态研究所 | Long-acting urea containing dicyandiamide and its producing method |
-
1997
- 1997-07-03 CN CN97111891A patent/CN1088692C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1136547A (en) * | 1996-01-31 | 1996-11-27 | 中国科学院沈阳应用生态研究所 | Long-acting urea containing dicyandiamide and its producing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100569705C (en) * | 2005-11-30 | 2009-12-16 | 中国科学院沈阳应用生态研究所 | A kind of slow-release nitro compound fertilizer and preparation method |
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| Publication number | Publication date |
|---|---|
| CN1204633A (en) | 1999-01-13 |
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