CN1088693C - Long-acting ammonium sulphate and method for preparation thereof - Google Patents
Long-acting ammonium sulphate and method for preparation thereof Download PDFInfo
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- CN1088693C CN1088693C CN97111892A CN97111892A CN1088693C CN 1088693 C CN1088693 C CN 1088693C CN 97111892 A CN97111892 A CN 97111892A CN 97111892 A CN97111892 A CN 97111892A CN 1088693 C CN1088693 C CN 1088693C
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- ammonium sulfate
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
- C05C3/005—Post-treatment
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
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Abstract
The present invention relates to long acting ammonium sulfate which exists in the form of a eutectic mixture of dicyanodiamide and ammonium sulfate, and the content of the dicyanodiamide is 0.3 wt% to 4 wt% of the ammonium sulfate. A preparation method comprises that after the dicyanodiamide is dissolved (with water or ammonium hydroxide), the dissolved dicyanodiamide is pumped by a metering pump into a reaction vessel for synthesizing the ammonium sulfate and is thoroughly mixed with a reaction solution, the solution after reacting is concentrated by the conventional technology, and the dicyanodiamide and the ammonium sulfate are crystallized, dewatered and dried. A fertilizer of the present invention has a long acting period, and the utilization rate of nitrogen is 10% higher than that of the common ammonium sulfate. Using the long acting fertilizer to replace the ammonium sulfate not only can obtain the aim of increasing both production and income, but also can reduce the discharge capacity of gas discharged by small farmland and causes atmosphere greenhouse effect so as to obtain obvious economic benefits and social benefits.
Description
The invention provides a kind of long-acting ammonium sulfate chemical fertilizer, specifically contain long-acting sulfuric acid of dihydro-amine and preparation method thereof.
Ammonium sulfate claims the sulphur ammonium again, it is one of important solid nitrogen fertilizers of more application in the present agricultural, nitrogenous 21%, be used in paddy rice, corn, cotton, fruit tree and the forestry in the nursery stock fertilising more, particularly on the vegetables (as: celery, lettuce) of happiness sulphur and tea tree, use more.Therefore, the sulphur ammonium is not only as nitrogenous fertilizer, and use as sulfur fertilizer, along with the change (high concentration fertilizer is sulfur-bearing no longer) of nitrogen fertilizers and the introducing of high-yield crop (they absorb a large amount of sulphur), make the lack of soil sulfur phenomenon outstanding day by day, the countries and regions that have are to not executing the stage that sulfur fertilizer just can not increase production.But the sulphur ammonium is as a kind of product nitrogenous fertilizer material, and its utilization ratio only is 30～43%, and its loss approach mainly is the NO that causes under nitrated-denitrification
3 -Leaching loss and N
2The airborne release of O.The nitrogen utilization efficiency of thiamine fertilizer is low to be 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 nitrogen 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 sulfate, or nitrogenous fertilizer long-acting synergist is added in the ammonium sulfate, all can not obviously increase the fertilizer efficiency period of ammonium sulfate 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 sulfate performance.
The objective of the invention is to solve the ammonium sulfate nitrogen and utilize low problem, a kind of long-acting ammonium sulfate 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 sulfate high nearly 5～8%.Use this long-acting fertilizer to replace ammonium sulfate, 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 sulfate 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 sulfate exist for the eutectic mixture form, and the content of Dyhard RU 100 is 0.3～4% of ammonium nitrate weight; Dyhard RU 100 and ammonium sulfate that so-called eutectic mixture form exists are in the building-up process of ammonium sulfate, 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 sulfate is as follows:
1. with after the Dyhard RU 100 dissolving (water or ammoniacal liquor), be input to volume pump in the reactor of synthetic ammonium sulfate and the reaction soln thorough mixing;
Again routinely technology back solution concentrates to reacting, Dyhard RU 100 and ammonium sulfate cocrystallization, dehydration and drying make finished product.
Long-acting ammonium sulphate of the present invention also can be as the carrier of micronutrient element, as: boron, manganese, molybdenum, zinc etc., produce the long-acting composite sulfur ammonium that contains multiple little fertilizer.Simultaneously this long-acting ammonium sulphate 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 sulphate
In the technical process of synthetic sulphur ammonium, set up a dissolving tank and volume pump, Dyhard RU 100 solution in the dissolving tank is quantitatively pumped in the synthetic sulphur ammonium reactor, technology is operated and can be obtained long-acting ammonium sulphate routinely again.
The application of embodiment 2 long-acting ammonium sulphates
Utilize the preparation method of embodiment 1, when adding the amount of different Dyhard RU 100s, contain the different sulphur ammonium of Dyhard RU 100, under the identical condition in field, make the ammonium stability experiment obtaining, and with common sulphur ammonium as a comparison, its result such as table 1.
Table 1 Dyhard RU 100 content is to the influence of sulphur ammonium nitrogen utilization efficiency
Two cyanogen ammonium content NH
4 +-N increases (%) NO
3 --N increases (%)
(%) (mgKg
-1) (mgKg
-1) sulphur ammonium (0) 1747.89--51.49--long-acting ammonium sulphate (0.3%) 1981.78 13.38 86.12 67.25 long-acting ammonium sulphate (0.5%) 2021.09 15.63 85.82 66.67 long-acting ammonium sulphate (1. 0%) 2208.56 26.35 82.96 61.12 long-acting ammonium sulphates (2.0%) 2467.37 41.16 80.15 55.66 long-acting ammonium sulphate (3.0%) 2590.12 48.18 78.33 52.13 long-acting ammonium sulphate (4.0%) 2601.35 48.82 71.52 38.90 long-acting ammonium sulphate (5.0%) 2646.81 51.43 63.87 24.04 long-acting ammonium sulphate (6.0%) 2691.44 53.98 55.68 8.14
Result by table 1, when the content of Dyhard RU 100 is crossed (＜0.3%) when low, limited to the effect that improves sulphur ammonium nitrogen utilization efficiency, and during too high levels (＞4%), 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 sulphate chemical fertilizer, and it is 1～3% more suitable generally containing with it.
Comparative example 1 Dyhard RU 100 adds the influence of form to sulphur ammonium nitrogen utilization efficiency
Utilize the method for embodiment 1 to prepare long-acting ammonium sulphate, the mixture with equivalent Dyhard RU 100 and sulphur ammonium 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 sulphur ammonium nitrogen utilization efficiency
4 +-N increases (%) NO
3 --N increases (%) amount and method (mgKg
-1) (mgKg
-1) 1. 2. synergistic agent (3%) 2211.19 26.51 61.87 20.16 of mechanically mixing (3%) 1801.76 3.08 56.10 8.95 of sulphur ammonium (0) 1747.89--51.49--long-acting ammonium sulphate (3%) 2590.12 48.18 78.33 52.13
1. with the Dyhard RU 100 of volume of ammonium sulfate 3% and sulphur ammonium 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% sulphur ammonium mixed fertilizer.
Result by table 2 can see in the identical various ammonium sulfate 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 sulphate contains Dyhard RU 100, it is characterized in that Dyhard RU 100 and ammonium sulfate exist for the eutectic mixture form, and the content of Dyhard RU 100 is 0.3～4% of sulphur ammonium weight; Dyhard RU 100 and ammonium sulfate that so-called eutectic mixture form exists are in the building-up process of sulphur ammonium, 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 sulphate of claim 1, it is characterized in that Dyhard RU 100 content is 1～3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97111892A CN1088693C (en) | 1997-07-03 | 1997-07-03 | Long-acting ammonium sulphate and method for preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97111892A CN1088693C (en) | 1997-07-03 | 1997-07-03 | Long-acting ammonium sulphate and method for preparation thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1204634A CN1204634A (en) | 1999-01-13 |
| CN1088693C true CN1088693C (en) | 2002-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97111892A Expired - Fee Related CN1088693C (en) | 1997-07-03 | 1997-07-03 | Long-acting ammonium sulphate and method for preparation thereof |
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| CN (1) | CN1088693C (en) |
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 CN97111892A patent/CN1088693C/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 |
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| Publication number | Publication date |
|---|---|
| CN1204634A (en) | 1999-01-13 |
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