CN106748570A - A kind of production technology of stability urea - Google Patents
A kind of production technology of stability urea Download PDFInfo
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- CN106748570A CN106748570A CN201611095049.5A CN201611095049A CN106748570A CN 106748570 A CN106748570 A CN 106748570A CN 201611095049 A CN201611095049 A CN 201611095049A CN 106748570 A CN106748570 A CN 106748570A
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- Prior art keywords
- urea
- stability
- medicament
- dissolved
- urea liquid
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- 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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/90—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting the nitrification of ammonium compounds or urea in the soil
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Soil Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Medicinal Preparation (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
The invention provides a kind of production technology of stability urea, introduce the urea liquid for being dissolved with stability medicament, it passes through strict control and is dissolved with moisture in the urea liquid of stability medicament, no matter whether this is dissolved with the urea liquid of stability medicament by evaporation step, will not influence be produced on granulation, with production stage simply, the advantages of operating flexible.
Description
Technical field
The present invention relates to fertilizer field, more particularly to a kind of production technology of stability urea.
Background technology
The chemical name of urea is carbonyl diamide, and its molecular formula is CO (NH2)2, nitrogen content is 46.65%, be nitrogen content most
Solid nitrogenous fertilizer high.Under laboratory condition, it is thus proposed that directly to the method production stability that stability medicament is added in urea
There are various condition limitations on urea, but actual production.In actual production process, the production technology of stability urea often office
It is limited to for gained to add system by solvent configuration stability liquid medicine of water before being evaporated containing urea liquid, by steaming
Excessive moisture is removed after hair, so as to granulate production stability urea product.
In above-mentioned production process, there are problems that it is many, for example：The moisture of addition can increase substantial amounts of to evaporation process
Energy consumption, in addition, above-mentioned production technology is in actual mechanical process, in order to control the moisture of products obtained therefrom, is generally selected at and contains
The stability medicament aqueous solution is added before urea liquid evaporation, but so operation can bring limitation, operation not enough letter to production
It is clean, underaction is produced, especially when simultaneously needs produce common urea product and stability urea product or other urea are produced
, it is necessary to estimate products obtained therefrom yield first during product, urea liquid is classified with before being evaporated containing urea liquid, with
Prepare the urea product of different demands amount.
Therefore, a kind of novel production process of stability urea how is researched and developed, to solve existing stability urea production work
Problem present in skill, as people's problem demanding prompt solution.
The content of the invention
In consideration of it, it is an object of the invention to provide a kind of production technology of stability urea, it is existing steady at least to solve
Complex process that qualitative urea production process is present, it is dumb the problems such as.
The technical scheme that the present invention is provided, specifically, a kind of production technology of stability urea, comprises the following steps：
1) synthetic tower will be entered by the ammonia of purification and carbon dioxide mix, reaction is obtained containing superfluous ammonia and aminoquinoxaline
Urea liquid；
2) by the urea liquid containing superfluous ammonia and aminoquinoxaline, lower the temperature through decompression, isolate ammonia and carbamic acid
Urea liquid after ammonium is evaporated to more than 99.5%, obtains thick urea liquid；
3) by the thick urea liquid injection granulation tower, urea product is obtained through granulation；
Characterized in that, in step 2) or step 3) in add and be dissolved with the urea liquid of stability medicament, it is and described molten
The weight content that solution has moisture in the urea liquid of stability medicament is less than or equal to 20%.
It is preferred that, the weight content for being dissolved with moisture in the urea liquid of stability medicament is 10%~15%.
Further preferably, the urea liquid for being dissolved with stability medicament is by small with fusing urea or moisture weight content
In the aqueous solution of urea equal to 20% for solvent steady dissolution medicament is prepared from.
Further preferably, the stability medicament is urease inhibitor.
Further preferably, the stability medicament is normal-butyl thiophosphoryl triamine.
The stability urea that the present invention is provided, introduces the urea liquid for being dissolved with stability medicament, and it passes through strict control
System is dissolved with moisture in the urea liquid of stability medicament, and no matter whether the urea liquid for being dissolved with stability medicament passes through
Pervaporation step, will not produce influence to granulation, simplify production stage, and operation is flexible.If in step 3) middle addition dissolving
When having the urea liquid of stability medicament, the urea liquid for being dissolved with stability medicament can be made not participate in evaporation step, effectively drop
Energy consumption in low evaporation process, even if additionally, producing common urea product and stability urea simultaneously on a production line
Product, need to only be separated in granulation step, can simplify production process.
Specific embodiment
The present invention is further expalined with specific embodiment below, but the guarantor being not intended to limit the invention
Shield scope.
Present embodiment provides a kind of production technology of stability urea, comprise the following steps：
1) 2.8~4.5 synthetic tower will be mixed into molar ratio by the ammonia of purification and carbon dioxide, tower pressure interior force is
13.8~24.6MPa, temperature is 180~200 DEG C, and the reaction mass residence time is 25~40min, reaction obtain containing superfluous ammonia and
The urea liquid of aminoquinoxaline；
2) by the above-mentioned urea liquid containing superfluous ammonia and aminoquinoxaline, lower the temperature through decompression, isolate ammonia and carbamic acid
Urea liquid after ammonium is evaporated to more than 99.5%, obtains thick urea liquid；
3) thick urea liquid is injected into granulation tower, granulation obtains urea product.
Wherein, can be in above-mentioned steps 2) or step 3) middle addition is dissolved with the urea liquid of stability medicament, and be dissolved with
The weight content of moisture is less than or equal to 20% in the urea liquid of stability medicament.
Wherein, adding the urea liquid amount for being dissolved with stability medicament can according to actual needs carry out specific design, its
Addition does not influence the implementation of the present embodiment.The urea liquid of stability medicament is dissolved with by with fusing urea or moisture weight
Aqueous solution of urea of the content less than or equal to 20% is prepared from for solvent steady dissolution medicament, and above-mentioned stability medicament is preferred
It is urease inhibitor, more preferably normal-butyl thiophosphoryl triamine.
In the present embodiment, due to needing to add the urea liquid for being dissolved with stability medicament, this will necessarily introduce one
Point moisture, in order to be able to simplify operating procedure, control is dissolved with the moisture of the urea liquid of stability medicament below 20%,
It is preferred that in step 2) after thick urea liquid evaporation step, in step 3) in introduce aforementioned stable liquid medicine, by above-mentioned
Uniqueness design, the additional energy that can not only avoid stability medicament from being brought to vapo(u)rization system, but also urea can be met
Moisture requirement in granulation process, makes the urea size obtained after granulation meet the requirements.Additionally, by above-mentioned design, even if one
Two kinds of products of common urea and stability urea are produced on bar production line simultaneously, also need to only be separated i.e. in granulation step
Can, production process can be simplified.
The stability medicament that the present embodiment is used can play stabilization to urea, it is to avoid urea molecule quickly divides
Solution, in particular by urease inhibitor, can preferably be dissolved in the relatively low urea liquid of moisture, so as to form dissolving
There is the urea liquid of stability medicament.
Experiments prove that, the moisture weight content being dissolved with the urea liquid of stability medicament can be preferably 10%
~15%, there is the effect for preferably simplifying production technology compared to not higher than 20%.
The herein described urea liquid for being dissolved with stability medicament is to mainly contain stability medicament, urea and moisture
Solution, remaining composition for containing is impurity component.
The present invention is further illustrated with specific embodiment below, but is not limited to this hair
Bright protection domain.
Embodiment 1
With reference to the production technology in the embodiment above, in step 2) in add the urea for being dissolved with stability medicament molten
Liquid, lowers the temperature, after evaporation, in step 3 through decompression) middle injection granulation tower, granulate and obtain stability urea product, wherein, it is dissolved with
The moisture weight content of the urea liquid of stability medicament is not higher than 20%, and stability medicament is urease inhibitor --- positive fourth
Base thiophosphoryl triamide, the aqueous solution of urea for using moisture weight content to be not higher than 20% is solvent dissolving urease inhibitor preparation
Obtain being dissolved with the urea liquid of stability medicament, and during dissolving urease inhibitor, the temperature of solution is 60-100 DEG C.
During above-mentioned technique is carried out, according to the different ratio of raw material, the moisture of final gained stability urea is determined
Weight content d1 (%) and weight of urea content m1 (%).
Using different in moisture weight content D (%) of the urea liquid for being dissolved with stability medicament, other conditions are identical, example
Such as it is dissolved with quality H1 (g) of the urea liquid of stability medicament, thick urea liquid quality H2 (g), its weight of urea content m2
(%), evaporates moisture weight content d2 (%) of liquid after evaporation.
Table specific as follows：
Testing result：The moisture and granularity of the stability urea of above-mentioned preparation meet standard requirement.
Embodiment 2
Other conditions are same as Example 1, and stability medicament uses normal-butyl thiophosphoryl triamine, but uses fusing urea
The urea liquid for being dissolved with stability medicament is prepared as solvent dissolving normal-butyl thiophosphoryl triamine.
Table specific as follows：
| D (%) | H1(g) | H2(g) | M2 (%) | D2 (%) | D1 (%) | M1 (%) |
| ＜ 1 | 1000 | 900 | 99 | 1.0 | 0.7 | 46.5 |
Testing result：Moisture and granularity in the stability urea of above-mentioned preparation meet standard requirement, and
Better than the stability urea prepared in embodiment 1.
Embodiment 3
With reference to the production technology in the embodiment above, in step 3) in by thick urea liquid and be dissolved with stability medicament
Urea liquid is injected in granulation tower simultaneously, and granulation obtains stability urea product.Wherein, the urea for being dissolved with stability medicament is molten
Moisture weight content is not higher than 20% in liquid, and stability medicament is urease inhibitor-normal-butyl thiophosphoryl triamine, is adopted
The aqueous solution of urea for being not higher than 20% with moisture weight content is that solvent dissolving urease inhibitor is prepared and is dissolved with stability
The urea liquid of medicament, the temperature of solution is 60-100 DEG C when urease inhibitor dissolves.
During above-mentioned technique is carried out, according to the different ratio of raw material, the moisture of final gained stability urea is determined
Weight content d1 (%) and weight of urea content m1 (%).
Using different in moisture weight content D (%) of the urea liquid for being dissolved with stability medicament, remaining condition is identical, example
Such as it is dissolved with quality H1 (g) of the urea liquid of stability medicament, thick urea liquid quality H2 (g), its weight of urea content m2
(%), evaporates moisture weight content d2 (%) of liquid etc. after evaporation.
Table specific as follows：
Testing result：Moisture and granularity in the urea of above-mentioned preparation meet standard requirement.
Embodiment 4
Other conditions are same as Example 3, and stability medicament uses normal-butyl thiophosphoryl triamine, but uses fusing urea
The urea liquid for being dissolved with stability medicament is prepared as solvent dissolving normal-butyl thiophosphoryl triamine.
Table specific as follows：
| D (%) | H1(g) | H2(g) | M2 (%) | D2 (%) | D1 (%) | M1 (%) |
| ＜ 1 | 1000 | 900 | 99 | 1.0 | 0.7 | 46.5 |
Testing result：Moisture and granularity in the urea of above-mentioned preparation meet standard requirement, and better than reality
Apply the stability urea prepared in example 3.
The system energy consumption of production stability urea in embodiment 1~4 is once measured, wherein, embodiment 1 and real
Apply energy consumption in the energy consumption about embodiment 3 and embodiment 4 in example 2 1.3~1.4 times.
Those skilled in the art considering specification and after putting into practice invention disclosed herein, will readily occur to it is of the invention its
Its embodiment.The application is intended to any modification of the invention, purposes or adaptations, these modifications, purposes or
Person's adaptations follow general principle of the invention and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
Claims (5)
1. a kind of production technology of stability urea, comprises the following steps：
1) synthetic tower will be entered by the ammonia of purification and carbon dioxide mix, reaction obtains the urine containing superfluous ammonia and aminoquinoxaline
Plain solution；
2) by the urea liquid containing superfluous ammonia and aminoquinoxaline, lower the temperature through decompression, after isolating ammonia and aminoquinoxaline
Urea liquid be evaporated to more than 99.5%, obtain thick urea liquid；
3) by the thick urea liquid injection granulation tower, urea product is obtained through granulation；
Characterized in that, in step 2) or step 3) in add and be dissolved with the urea liquid of stability medicament, and described be dissolved with
The weight content of moisture is less than or equal to 20% in the urea liquid of stability medicament.
2. the production technology of stability urea according to claim 1, it is characterised in that the stability medicament that is dissolved with
The weight content of moisture is 10%~15% in urea liquid.
3. the production technology of stability urea according to claim 1 or claim 2, it is characterised in that described to be dissolved with stability medicine
The urea liquid of agent is solvent steady dissolution by the aqueous solution of urea with fusing urea or moisture weight content less than or equal to 20%
Property medicament is prepared from.
4. the production technology of stability urea according to claim 3, it is characterised in that the stability medicament is urase suppression
Preparation.
5. the production technology of stability urea according to claim 3, it is characterised in that the stability medicament is normal-butyl
Thiophosphoryl triamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611095049.5A CN106748570A (en) | 2016-12-02 | 2016-12-02 | A kind of production technology of stability urea |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611095049.5A CN106748570A (en) | 2016-12-02 | 2016-12-02 | A kind of production technology of stability urea |
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| CN106748570A true CN106748570A (en) | 2017-05-31 |
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| CN201611095049.5A Pending CN106748570A (en) | 2016-12-02 | 2016-12-02 | A kind of production technology of stability urea |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107827624A (en) * | 2017-12-20 | 2018-03-23 | 青岛住商中农肥料有限公司 | A kind of Synergistic slow release urea and its preparation technology |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104926570A (en) * | 2015-02-10 | 2015-09-23 | 四川美丰化工股份有限公司 | Method of producing urea with high stability |
| CN105439907A (en) * | 2015-12-02 | 2016-03-30 | 锦西天然气化工有限责任公司 | Production technology of stable urea |
-
2016
- 2016-12-02 CN CN201611095049.5A patent/CN106748570A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104926570A (en) * | 2015-02-10 | 2015-09-23 | 四川美丰化工股份有限公司 | Method of producing urea with high stability |
| CN105439907A (en) * | 2015-12-02 | 2016-03-30 | 锦西天然气化工有限责任公司 | Production technology of stable urea |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107827624A (en) * | 2017-12-20 | 2018-03-23 | 青岛住商中农肥料有限公司 | A kind of Synergistic slow release urea and its preparation technology |
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Application publication date: 20170531 |