CN1180684A - Compound long-lasting urea fertilizer and preparing method thereof - Google Patents
Compound long-lasting urea fertilizer and preparing method thereof Download PDFInfo
- Publication number
- CN1180684A CN1180684A CN 96119494 CN96119494A CN1180684A CN 1180684 A CN1180684 A CN 1180684A CN 96119494 CN96119494 CN 96119494 CN 96119494 A CN96119494 A CN 96119494A CN 1180684 A CN1180684 A CN 1180684A
- Authority
- CN
- China
- Prior art keywords
- urea
- fertilizer
- inhibitor
- lasting
- add
- 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.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
- C05C9/005—Post-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
A long-acting compound urea fertilizer containing urease and nitrating inhibitors and used as base fertilizer features that after syntehsizing urea, hydroquinone as urease inhibitor and dicyandiamide as nitrating inhibitor are added, and serves to decrease the loss of urea N from soil.
Description
The present invention relates to urea fertilizer, specifically a kind of compound long-lasting urea fertilizer and manufacturing process thereof that contains urease inhibitor and nitrification inhibitor.
Urea fertilizer is to use maximum a kind of solid chemical fertilizer in the present world agriculture, though it has the nitrogen content height, use conveniently, more stable advantage, but because the common urase of enzymolysis urea and the nitrate reductase that its enzymolysis product is carried out of existing in the soil, make urea be manured into soil the back under their serial action, change into ammonia-state nitrogen and nitric nitrogen soon, and can not all be utilized by plant absorbing immediately, often cause the murder by poisoning of plant seedlings and more gaseous loss and leaching loss, cause the utilization ratio of urea fertilizer many,, reduce the loss of blood urea nitrogen in being manured into soil in order to improve the nitrogen utilization efficiency of urea below 40%, in recent ten years, people attempt to take number of ways to study controlled availability fertilizer, realize that urea is unlikely hydrolysis rapidly in soil in a short time, but its effect are undesirable.
The objective of the invention is shortcoming at above-mentioned existence, provide a kind of long-acting carbamide with simple technology, this urea can reduce the accumulation and the loss of nitrate effectively, make the ammonia in the urea in soil, obtain the maintenance more and longer time, guarantee that crop is for fertile needs, prolong the fertilizer efficiency of urea again, improve its utilization ratio.
The object of the present invention is achieved like this: after selecting for use urease inhibitor and nitrification inhibitor to add the urea production synthesis procedure to, before the granulating working procedure, the urease inhibitor and the nitrification inhibitor that add to after the urea synthesis operation are respectively quinhydrones and Dyhard RU 100, and its proportioning is to add 1～3 ‰ and 1～10 ‰ of urea (weight) respectively.Add to and make compound manure in the urea and can suppress the decomposition rate of urea and nitrated effectively.Experiment shows: add certain amount of H Q and DCD in urea, the utilization ratio of its nitrogen improves 10% than common urea; Crop yield increases more than 10%.
Processing method provided by the invention is easy to combine with the existing urea technique of producing, and in conjunction with urea synthesis technology and the condition used at present, needs equipment few, and processing method is simple, is easy to apply in chemical fertilizer industry is produced.After using this fertilizer to apply, can reduce the loss of blood urea nitrogen in the soil, adapt to various farm crop and use, but as the base manure applied once, the saving of labor, joint is fertile, remarkable in economical benefits.
Compound New-type long-acting urea of the present invention also can be used as other in a large number and the carriers of micronutrient element, add P, and K and various trace element be as boron, zinc, and iron, manganese etc. can be made into the compound long-acting compound manure that contains various nutrient elements.
The manufacturing process of compound long-acting urea of the present invention is in the preceding operation of the urea moulding (granulation) of the urea production process that adopts at present, a pipeline is set HQ and DCD are joined concentrated urine according to a certain ratio or dissolves in the urea, make it fully to puddle and evenly make finished product.In this manufacturing process,,, just can utilize original equipment to produce compound long-acting urea so need to increase the inhibitor adding set and puddle device owing to be based on former urea synthesis production technique.
Utilize example and accompanying drawing that the present invention is described further below.
Existing urea technological process of production synoptic diagram shown in the figure, wherein: 1) NH
3With CO
2Mixing tank; 2) synthetic tower; 3) give separator; 4) press in and decompose pressurizer; 5) press separator decomposition in; 6) low pressure decomposition heater; 7) low-pressure distillation tower; The low pressure separator decomposition; 9) urine flash drum; 10) general vaporizer; 11) general vapor seperator; 12) two-section evaporating heater; 13) dual circulation separator; 17) be pressed into prilling tower; 18) carry out granulation and get compound New-type long-acting urea; Technology of the present invention is: increase by 14) HO and DCD puddle device; 15) HQ+DCD mixed solution metering sample feeding pump; 16) puddle device (HQ+DCD mixed solution and concentrated urine formula fusing urea are puddled evenly at this).
Except that above-mentioned manufacturing process, processing method of the present invention also is applicable to other processing method of present production urea, for example: hot gas cycle method, gas delivery circulation method, slurries circulation method; Production technique such as gas formulation and connection pump method just add in these technologies and add HQ, DCD and puddle two procedures.
Claims (2)
1. compound long-lasting urea fertilizer, in the urea operation, add inhibitor, the urease inhibitor and the nitrification inhibitor that it is characterized in that adding to after the urea synthesis operation are respectively quinhydrones and Dyhard RU 100, and its proportioning is to add 1～3 ‰ and 1～10 ‰ of urea (weight) respectively.
2. a method for preparing the described long-acting urea fertilizer of claim 1 is characterized in that behind the urea production synthesis procedure, before the granulating working procedure, adds quinhydrones and Dyhard RU 100; Increased HO and DCD and puddled device (14), HQ and DCD mixed solution metering sample feeding pump (15) are puddled device (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96119494A CN1073975C (en) | 1996-10-18 | 1996-10-18 | Compound long-lasting urea fertilizer and preparing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96119494A CN1073975C (en) | 1996-10-18 | 1996-10-18 | Compound long-lasting urea fertilizer and preparing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1180684A true CN1180684A (en) | 1998-05-06 |
| CN1073975C CN1073975C (en) | 2001-10-31 |
Family
ID=5125745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96119494A Expired - Fee Related CN1073975C (en) | 1996-10-18 | 1996-10-18 | Compound long-lasting urea fertilizer and preparing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1073975C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337992C (en) * | 2005-02-22 | 2007-09-19 | 徐州市五谷丰化肥有限公司 | 46% sulfur based 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 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2964960A1 (en) | 2014-10-31 | 2016-05-06 | Koch Agronomic Services, Llc | Nitrification inhibitor compositions and methods of making thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85109580B (en) * | 1985-12-30 | 1988-05-04 | 中国科学院林业土壤研究所 | Production of lang life urea fertilizers containing para-dihydroxyl-benzene |
| DE3714729A1 (en) * | 1987-05-02 | 1988-11-10 | Sueddeutsche Kalkstickstoff | NITRIFICATION AGENT |
| CN1065651A (en) * | 1992-04-03 | 1992-10-28 | 内蒙古自治区大兴安岭农场管理局扎赉河肥料厂 | Synergist and nitrogen protective agent for urea |
-
1996
- 1996-10-18 CN CN96119494A patent/CN1073975C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337992C (en) * | 2005-02-22 | 2007-09-19 | 徐州市五谷丰化肥有限公司 | 46% sulfur based 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1073975C (en) | 2001-10-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103804092B (en) | Sugarcane special-purpose fertilizer material and preparation method thereof | |
| CN102260111B (en) | Method for preparing humic acid-urea complex in aqueous medium | |
| CN102153424B (en) | Novel method for preparing humic acid urea slow release fertilizer | |
| CN100513359C (en) | Method for preparing slow-release multielement compound-mixed fertilizer for forest trees | |
| CN101781151A (en) | Amino acid chelated medium and trace element water-soluble fertilizer in and preparation method thereof | |
| CN1084320C (en) | Long-lasting special-purpose compound mixed fertilizer for corn and rice | |
| CN102173962A (en) | Built-in screen type controlled-release urea as well as production method and application thereof | |
| CN102887794A (en) | Nitrogen-phosphorus-potassium high-concentration liquid fertilizer containing synergist and preparation method thereof | |
| CN102503628A (en) | Preparation method of humic acid/urea long-acting nitrogen fertilizer | |
| CN105254664A (en) | Synthesis method for urease inhibitor and application of urease inhibitor | |
| CN104829342A (en) | Method for producing compound fertilizer from allantoin wastewater | |
| CN101955379A (en) | Preparation method for nitrate urea-formaldehyde fertilizer | |
| CN103896686A (en) | Stability urea and preparation method thereof | |
| CN1255468A (en) | Long-acting special compound (mixed) fertilizer | |
| CN102515924A (en) | Preparation method of chlorine-free compound fertilizer | |
| CN105110892A (en) | Macroelement water soluble fertilizer and preparation method therefor | |
| CN103232270A (en) | Method for synthesizing urea ammonia nitrate (UAN) high-nitrogen slow-release liquid composite fertilizer | |
| CN103739406A (en) | Humic acid chelated boron, magnesium, zinc and iron fertilizer and preparation method thereof | |
| CN1073975C (en) | Compound long-lasting urea fertilizer and preparing method thereof | |
| CN1629106A (en) | Quick dissolving fertilizer containing nitro ammonium humate and method for preparing same | |
| CN1255473A (en) | Slowly-releasing long-acting agent for compound (mixed) fertilizer | |
| CN101870606A (en) | Production formula and process for novel sustained release fertilizer tablets | |
| CN116693342A (en) | Preparation method of stable synergistic liquid fertilizer containing polymerized phosphorus and fertilizer | |
| CN107827680A (en) | A kind of zinc-base activated water-soluble compound trace element fertilizer and preparation method thereof | |
| CN105330465A (en) | Process for preparing urea humate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |