CN1465553A - Stable urea and production process - Google Patents
Stable urea and production process Download PDFInfo
- Publication number
- CN1465553A CN1465553A CNA02132493XA CN02132493A CN1465553A CN 1465553 A CN1465553 A CN 1465553A CN A02132493X A CNA02132493X A CN A02132493XA CN 02132493 A CN02132493 A CN 02132493A CN 1465553 A CN1465553 A CN 1465553A
- Authority
- CN
- China
- Prior art keywords
- urea
- inhibitor
- stable urea
- ton
- urease inhibitor
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Images
Landscapes
- Fertilizers (AREA)
Abstract
The present invention relates to a stable urea and its production process. Said stable urea contains 0.1-1.0% of urease inhibitor, 0.1-1.0% of nitration inhibitor and 3-10% of ammonia stabilizer, in which N content is 42-44%. On the basis of existent urea production process the above-mentioned urease inhibitor, nitration inhibitor and ammonia stabilizer can be dissolved and quantitatively added in different region and periods of time so as to obtain the invented product whose nitrogen utilization rate can be up to 45% and fertilizer effect time can be up to 120 days.
Description
Technical field
The present invention relates to a kind of urea and production technique thereof, particularly a kind of fertilizer efficiency period is long, the high urea and the production technique thereof of utilization ratio of nitrogen.
Background technology
Nitrogen is the most important nutritive element of plant growth, and urea is the topmost kind of nitrogenous fertilizer.But, the loss of nitrogen in soil is too high, utilization ratio only has 33%, for a long time, in order to improve the utilization ratio of urea, people have carried out number of research projects, have produced as products such as coated urea, urea formadehyde, long-acting carbamides, all obtaining certain effect aspect the raising nitrogen use efficiency, but owing to higher restriction of its cost applied.
Summary of the invention
The objective of the invention is to be to provide a kind of new urea kind, its existing higher nitrogen use efficiency and long fertilizer efficiency period can reduce cost again.
The production technique of the stable urea that another object of the present invention is to provide above-mentioned.
In order to achieve the above object, technical scheme of the present invention is:
A kind of stable urea is added with urease inhibitor HQ, nitrification inhibitor DCD and ammonia stablizer HA in common urea, its effective ingredient is by weight percentage:
N 42～44％
Urease inhibitor 0.1～1.0%
Nitrification inhibitor 0.1～1.0%
Ammonia stablizer 3～10%
Surplus is C, H, O.
Above-mentioned ammonia stablizer is cyanamide, Dicyanodiamide or a trimeric cyanamide in the cyanamide class; Urease inhibitor is pyrocatechol, Resorcinol or a para benzoquinone in the phenol.
The production technique of aforementioned stable urea is on the basis of existing urea production technique, at evaporization process, quantitatively adds nitrification inhibitor DCD and urease inhibitor HQ; Quantitatively add ammonia stablizer HA at granulation process, finish the production process of stable urea.
In the above-mentioned production technique, nitrification inhibitor and urease inhibitor can adopt intermittent type quantitatively to add.
In the production process of reality, need to add specific equipments such as feed bin, dissolving tank, volume pump, annular nozzle, pressure pump, inhibitor and stablizer are accurately joined in the production system by the requirement of component.
The loss of nitrogen in soil mainly contains aspect two: the one, and the volatilization of ammonia-state nitrogen; Next is the loss of nitric nitrogen.Add the activity that urease inhibitor can suppress urase in the soil in the stable urea, promptly slow down urea and be converted into NH
3And CO
2Speed; DCD can stop nitration reaction, and right with absorption of N H
3Thereby, play the effect of fixed nitrogen; HA can adsorb NH
3, the activity of inhibitor urase is improved the soil, and can increase the content of nitrogen in the soil.
Advantage of the present invention and effect:
1. on the surface, the nitrogen content of urine stabilizing attainment provided by the present invention has reduced about 2～4% than common urea, but fertilizer efficiency period extended to 110～120 days by 60 days; Therefore, can guarantee crop yield about 8%; Stable urea is done the base manure single-dose application and is not topdressed.Therefore, this urea has distinguishing features such as long-acting, efficient saving of labor increases production, increases income.
Since nitrogen use efficiency up to 45%, therefore, this stable urea to the protection environment, alleviate river pollution and can play an important role, be specially adapted to exempt from intertillage agricultural, water-saving agriculture.
3. the production technique of stable urea provided by the present invention only needs to increase a spot of mass transport in former urea production process, and specific equipment is added in metering.By specific equipment above-mentioned substance is joined in the carbamide production system equably, can produce qualified stable urea.
4. because nitrification inhibitor provided by the present invention and urease inhibitor adopt intermittent type quantitatively to add, and the ammonia stablizer adds in making material process, above-mentioned additive is blended in the urea equably, promptly reaches the effect that prolongs fertilizer efficiency period, can reach the purpose that reduces cost again.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Embodiment 1
See also Fig. 1, adopt the production technique of existing urea, the synthetic decomposition under High Temperature High Pressure with ammonia and carbonic acid gas, enter evaporization process and granulating working procedure.Calculate according to producing 1 ton of stable urea, its nitrogen content is 0.42 ton, by special-purpose metering outfit, 0.001 ton of urease inhibitor pyrocatechol and 0.01 ton of nitrification inhibitor after the dissolving are added in the reactor of evaporation through dissolving tank and volume pump, enter granulating working procedure then, and when reaction solution enters, add 0.03 ton of ammonia stablizer cyanamide with special-purpose metering outfit, finally finish the production process of stable urea.
Embodiment 2
Production technique is with embodiment 1.Calculate according to producing 1 ton of stable urea, its nitrogen content is 0.43 ton, by special-purpose metering outfit, add to 0.005 ton of urease inhibitor Resorcinol and 0.05 ton of nitrification inhibitor after the dissolving in the reactor of evaporation with intermittent mode, its pitch time, can determine according to the flow in the reaction process; And, add 0.04 ton of ammonia stablizer Dicyanodiamide with special-purpose metering outfit in granulating working procedure, finally finish the production process of stable urea.
Embodiment 3
With embodiment 1.Calculate according to producing 1 ton of stable urea, its nitrogen content is 0.44 ton, by special-purpose metering outfit, add to 0.01 ton of urease inhibitor para benzoquinone and 0.001 ton of nitrification inhibitor after the dissolving in the reactor of evaporation with intermittent type, and in granulating working procedure, add 0.1 ton of ammonia stablizer with special-purpose metering outfit, finally finish the production process of stable urea.
Embodiment 4
With embodiment 1.Calculate according to producing 1 ton of stable urea, its nitrogen content is 0.435 ton, by special-purpose metering outfit, add to 0.006 ton of urease inhibitor Resorcinol and 0.004 ton of nitrification inhibitor after the dissolving in the reactor of evaporation with intermittent type, and in granulating working procedure, add 0.06 ton of ammonia stablizer with special-purpose metering outfit, finally finish the production process of stable urea.
Embodiment 5
With embodiment 1.Calculate according to producing 1 ton of stable urea, its nitrogen content is 0.425 ton, by special-purpose metering outfit, add to 0.008 ton of urease inhibitor Resorcinol and 0.01 ton of nitrification inhibitor after the dissolving in the reactor of evaporation with intermittent type, and in granulating working procedure, add 0.08 ton of ammonia stablizer cyanamide with special-purpose metering outfit, finally finish the production process of stable urea.
Claims (5)
1. stable urea, it is characterized in that: be added with urease inhibitor HQ, nitrification inhibitor DCD and ammonia stablizer HA in common urea, its effective ingredient is by weight percentage:
N 42～44％
Urease inhibitor 0.1～1.0%
Nitrification inhibitor 0.1～1.0%
Ammonia stablizer 3～10%.
2. according to the described stable urea of claim 1, it is characterized in that: the ammonia stablizer is cyanamide, Dicyanodiamide or a trimeric cyanamide in the cyanamide class.
3. according to the described stable urea of claim 1, it is characterized in that: urease inhibitor is pyrocatechol, Resorcinol or a para benzoquinone in the phenol.
4. the production technique of the described stable urea of claim 1 is characterized in that: on the basis of existing urea production technique, at evaporization process, quantitatively add nitrification inhibitor and urease inhibitor; Quantitatively add the ammonia stablizer at granulation process, finish the production process of stable urea.
5. according to the production technique of the described stable urea of claim 4, it is characterized in that: at evaporization process, nitrification inhibitor and urease inhibitor can adopt intermittent type quantitatively to add.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA02132493XA CN1465553A (en) | 2002-06-28 | 2002-06-28 | Stable urea and production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA02132493XA CN1465553A (en) | 2002-06-28 | 2002-06-28 | Stable urea and production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1465553A true CN1465553A (en) | 2004-01-07 |
Family
ID=34145197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA02132493XA Pending CN1465553A (en) | 2002-06-28 | 2002-06-28 | Stable urea and production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1465553A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102442868A (en) * | 2011-09-29 | 2012-05-09 | 廊坊北鑫化工有限公司 | Additive for urea with long-term stability |
| CN103288565A (en) * | 2012-02-28 | 2013-09-11 | 施可丰化工股份有限公司 | Long-lasting potassium sulphate type compound fertilizer special for sugarcanes |
| CN103896686A (en) * | 2014-04-17 | 2014-07-02 | 张彬 | Stability urea and preparation method thereof |
| 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 |
| CN105367175A (en) * | 2015-12-02 | 2016-03-02 | 锦西天然气化工有限责任公司 | Production process for zinc-containing urea |
| 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 |
| CN109641812A (en) * | 2016-10-13 | 2019-04-16 | 科氏农艺服务有限责任公司 | The recycling of the component of waste stream is processed from urea and is reused |
-
2002
- 2002-06-28 CN CNA02132493XA patent/CN1465553A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102442868A (en) * | 2011-09-29 | 2012-05-09 | 廊坊北鑫化工有限公司 | Additive for urea with long-term stability |
| CN103288565A (en) * | 2012-02-28 | 2013-09-11 | 施可丰化工股份有限公司 | Long-lasting potassium sulphate type compound fertilizer special for sugarcanes |
| CN103288565B (en) * | 2012-02-28 | 2015-08-26 | 施可丰化工股份有限公司 | The long-acting potassium sulfate type Chemical Mixed Fertilizer that a kind of sugarcane is special |
| CN103896686A (en) * | 2014-04-17 | 2014-07-02 | 张彬 | Stability urea and preparation method thereof |
| CN103896686B (en) * | 2014-04-17 | 2015-08-26 | 张彬 | A kind of stability urea |
| 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 |
| CN104926570B (en) * | 2015-02-10 | 2018-03-16 | 四川美丰化工股份有限公司 | A kind of method of production stability urea |
| CN105367175A (en) * | 2015-12-02 | 2016-03-02 | 锦西天然气化工有限责任公司 | Production process for zinc-containing urea |
| 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 |
| CN105439907B (en) * | 2015-12-02 | 2017-10-17 | 锦西天然气化工有限责任公司 | A kind of production technology of stability urea |
| CN109641812A (en) * | 2016-10-13 | 2019-04-16 | 科氏农艺服务有限责任公司 | The recycling of the component of waste stream is processed from urea and is reused |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5352265A (en) | Granular urea-based fertilizer | |
| LU500810B1 (en) | Synergistic and stable nitrogen fertilizer and manufacturing process therefor | |
| CN106866242B (en) | Fertilizer synergist, synergistic fertilizer and preparation method thereof | |
| CN102040435B (en) | Preparation method of organic slow-release fruit fertilizer | |
| CN101723754B (en) | High-efficient controlled release compound fertilizer and preparation method thereof | |
| CN110981596B (en) | Soybean foliar fertilizer for increasing flower and protecting pod and preparation method and application thereof | |
| CN102584497A (en) | Glutamic acid synergist urea and preparation method thereof | |
| CN102786346B (en) | Synergistic slow-release urea fertilizer and preparation method thereof | |
| CN102173962A (en) | Built-in screen type controlled-release urea as well as production method and application thereof | |
| CN109232137A (en) | A kind of carbon coupled mode stability nitrogen fertilizer and preparation method | |
| CN1169758C (en) | Long-acting water-retaining complex fertilizer and its preparation method and special-purpose equipment | |
| CN1465553A (en) | Stable urea and production process | |
| SK281704B6 (en) | Liquid organo-mineral fertilizer | |
| CN102786367A (en) | Synergistic slow-release urea fertilizer and preparation method thereof | |
| AU2021100557A4 (en) | Carbon-coupled stabilized nitrogen fertilizer and preparation method | |
| CN106187640B (en) | Medium carrier type slow-release carbamide based on rare earth modified reinforcing and preparation method thereof | |
| CN113024328A (en) | Application of compound containing 2-cyclopentenone as synergist of nitrogen-containing fertilizer | |
| KR20000037120A (en) | Fertilizer | |
| CN1158227C (en) | Compound long-acting urea and its producing process and special equipment | |
| CN1269774C (en) | Nano urea and its preparing process | |
| CN104355811A (en) | Slow-dissolving-type fertilizer | |
| AU2021100558A4 (en) | Carbon-coupled stabilized compound fertilizer and preparation method | |
| CN114368995B (en) | Combined fertilizer composition for rice and application thereof | |
| CN102910961A (en) | Novel regulator slow-release nitrogen fertilizer | |
| VIDICAN et al. | Reducing the Loss of Nitrogen in Athmosphere by Granular Urea |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |