CN1789207A - Urea formaldehyde and its production process - Google Patents
Urea formaldehyde and its production process Download PDFInfo
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- CN1789207A CN1789207A CN 200510048091 CN200510048091A CN1789207A CN 1789207 A CN1789207 A CN 1789207A CN 200510048091 CN200510048091 CN 200510048091 CN 200510048091 A CN200510048091 A CN 200510048091A CN 1789207 A CN1789207 A CN 1789207A
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Abstract
The invention discloses a chemical type slow release long-acting nitrogenous fertilizer synthesized from formaldehyde and urea and the production process, wherein the fertilizer is prepared from the following raw materials (by mol ratio): formaldehyde : urea = 1 : 1-3.
Description
Affiliated technical field
The invention belongs to the technical field of slow release long-acting fertilizer one urea formadehyde, relate in particular to a kind of chemotype slow release long-acting nitrogenous fertilizer and production technique thereof by formaldehyde and urea synthesis.
Background technology
Slow release long-acting fertilizer is the developing direction of fertilizer, and its advantage is that nutrient discharges slowly, and fertilizer efficiency period is long, and loss amount is big, the utilization ratio height.Can reach single fertilization on agricultural, exempt the operation of topdressing, it is coordinated substantially for fertile process and regulation of fertilizer requirement of farm crop, reaches the comprehensive benefit that saves fertilizer, saving of labor, increases production, increases income; On ecotope, Gu slow release long-acting utilization rate of fertilizer height runs off, volatile quantity is few, can reduce the pollution of fertilizer to environment; In addition, Gu slow release long-acting utilization rate of fertilizer height can reduce fertilizer amount, have remarkable economical, society and ecological environment benefit and save a large amount of resources.
At present, the slow release long-acting fertilizer of the producer and use has three types both at home and abroad: the one, and physical: large-particle fertilizer, coating and coated fertilizer; The 2nd, chemotype: urea formadehyde, IBDU, oxamide etc.; The 3rd, biochemical: add urea, bicarbonate of ammonia of various inhibitor etc.
The weak point that prior art exists is: nutrient release and crop regulation of fertilizer requirement are inharmonious in the fertilizer, and the ratio of promptly quick-acting nitrogen, middle effect nitrogen and slow nitrogen is not suitable for, and the seedling stage that has is not enough for fertilizer, poor growth, and the later stage that has is taken off fertilizer, influences output.
Summary of the invention
At the technical problem of above-mentioned existence, it is long to the invention provides a kind of fertilizer efficiency period, and utilization ratio significantly improves, a kind of urea formadehyde and production technique thereof that loss amount is few.
The present invention is achieved in that
A kind of urea formadehyde, it is to be made of following material molar ratio: formaldehyde: urea=1: 1～3;
The production technique of described urea formadehyde is as follows:
Get in formaldehyde and the urea adding reactor by above-mentioned ratio, react under the following conditions, its ph value of reaction is reached: 4.0～9.0; Temperature of reaction reaches: 30～90 ℃; Reaction times is: 30 minutes～3 hours; Dry filtration through whizzer, dry again, be crushed to 40～80 orders, get final product to moisture content to 1.0～5.0%.
The key technical indexes of described urea formadehyde is:
Total nitrogen content: 37～40%;
Water soluble nitrogen content: 10～13%;
The insoluble nitrogen content of cold water: 24～28%;
The insoluble nitrogen content of hot water: 11～14%;
Vigor coefficient: 40～60%;
Urea nitrogen content: 1.0～5.0%;
Biuret Content: 0.3～0.7%;
Moisture content: 1.0～5.0%.
Advantageous effect of the present invention is as follows:
Urea formadehyde is a kind of of slow release long-acting nitrogenous fertilizer, is characterized in that nitrogen discharges slowly, and fertilizer efficiency period is long, the utilization ratio height, and loss amount is few.Fertilizer efficiency period is 8-10 a times of common urea, reaches more than 1 year, and utilization ratio can double.Urea formadehyde is widely used in agricultural, forestry and environmental greening, can use separately, also can be used with other fertilizer, or make composite fertilizer, the urea formadehyde production technique is simple and easy to do, less investment, instant effect, raw material abundance, extensive market, especially world market, supply falls short of demand especially.Can be useful in areas such as Japan, North America widely, its market outlook are wide.
Embodiment
Urea formadehyde of the present invention also claims urea formaldehyde (UF), be by urea and formaldehyde with various processes, be connected with ionic linkage by covalency, and absorption mutually, parcel and the class novel compositions that constitutes.Its contained nitrogen depends on the character of each composition and chemical bond, the stereochemical structure that is connected each other thereof with release rate.Look hydrophobicity, degraded difficulty and crosslinking degree.
Urea formadehyde of the present invention can use separately, also can be used with other fertilizer, or make composite fertilizer.
The substantive distinguishing features of urea formadehyde of the present invention and production technique thereof is: the nitrogen release rate can be adjusted by production technique, making its quick-acting nitrogen is that water-soluble nitrogen, middle effect nitrogen are that the ratio of cold water insoluble and hot water solubility's nitrogen and the insoluble nitrogen of slow nitrogen hot water and breeding time and the regulation of fertilizer requirement of farm crop are coordinated, reach best fertilizer efficiency period and utilization ratio, make agricultural reach optimum economic benefit, and good society and ecological environment benefit.
Embodiment 1:
A kind of urea formadehyde is characterized in that it is to be made of following material molar ratio:
Formaldehyde: urea=1: 1;
Its production technique is as follows:
Get in 100 kilograms in formaldehyde and 100 kilograms of adding reactors of urea by above-mentioned ratio, react under the following conditions, its ph value of reaction is reached: 4.0; Temperature of reaction reaches: 30 ℃; Reaction times is 2 hours; Dry filtration through whizzer, dry again, be crushed to 40 orders, get final product to moisture content to 4.1%.
The key technical indexes of described urea formadehyde is:
Total nitrogen content reaches 38.5%;
Water soluble nitrogen content reaches: 11.0%;
The insoluble nitrogen content of cold water reaches: 26.5%;
The insoluble nitrogen content of hot water reaches: 12.6%;
The vigor coefficient reaches: 52%;
Urea nitrogen content: 3.5%;
Biuret Content: 0.6%;
Moisture content: 4.1%.
Embodiment 2:
A kind of urea formadehyde is characterized in that it is to be made of following material molar ratio:
Formaldehyde: urea=1: 2;
Its production technique is as follows:
Get in 100 kilograms in formaldehyde and 200 kilograms of adding reactors of urea by above-mentioned ratio, react under the following conditions, its ph value of reaction is reached: 9.0; Temperature of reaction reaches: 88 ℃; Reaction times is 3 hours; Dry filtration through whizzer, dry again, be crushed to 50 orders, get final product to moisture content to 3.8%.
The key technical indexes of described urea formadehyde is:
Total nitrogen content 39.0%;
Water soluble nitrogen content: 10.5%;
The insoluble nitrogen content of cold water: 26.1%;
The insoluble nitrogen content of hot water: 13.4%;
Vigor coefficient: 49%.
Urea nitrogen content: 2.8%;
Biuret Content: 0.5%;
Moisture content: 3.8%.
Embodiment 3:
A kind of urea formadehyde is characterized in that it is to be made of following material molar ratio:
Formaldehyde: urea=1: 3;
Its production technique is as follows:
Get in 100 kilograms in formaldehyde and 300 kilograms of adding reactors of urea by above-mentioned ratio, react under the following conditions, its ph value of reaction is reached: 9.0; Temperature of reaction reaches: 90 ℃; Reacted 3 hours; Dry filtration through whizzer, dry again, be crushed to 60 orders, get final product to moisture content to 2.4%.
The key technical indexes of described urea formadehyde is:
Total nitrogen content: 40%;
Water soluble nitrogen content: 13%;
The insoluble nitrogen content of cold water: 28%;
The insoluble nitrogen content of hot water: 14%;
Vigor coefficient: 60%;
Urea nitrogen content: 4.0%;
Biuret Content: 0.4%;
Moisture content: 2.4%.
Embodiment 4:
A kind of urea formadehyde is characterized in that it is to be made of following material molar ratio:
Formaldehyde: urea=1: 1;
Its production technique is as follows:
Get in 100 kilograms in formaldehyde and 100 kilograms of adding reactors of urea by above-mentioned ratio, react under the following conditions, its ph value of reaction is reached: 4.0; Temperature of reaction reaches: 30 ℃; Reaction times is 2 hours; Dry filtration through whizzer, dry again, be crushed to 40 orders, get final product to moisture content to 1.0%.
The key technical indexes of described urea formadehyde is:
Total nitrogen content reaches 37%;
Water soluble nitrogen content reaches: 10%;
The insoluble nitrogen content of cold water reaches: 24%;
The insoluble nitrogen content of hot water reaches: 11%;
The vigor coefficient reaches: 40%;
Urea nitrogen content: 1.0%;
Biuret Content: 0.3%;
Moisture content: 1.0%.
Embodiment 5:
A kind of urea formadehyde is characterized in that it is to be made of following material molar ratio:
Formaldehyde: urea=1: 3;
Its production technique is as follows:
Get in 100 kilograms in formaldehyde and 300 kilograms of adding reactors of urea by above-mentioned ratio, react under the following conditions, its ph value of reaction is reached: 9.0; Temperature of reaction reaches: 90 ℃; Reacted 3 hours; Dry filtration through whizzer, dry again, be crushed to 80 orders, get final product to moisture content to 5.0%.
The key technical indexes of described urea formadehyde is:
Total nitrogen content: 40%;
Water soluble nitrogen content: 13%;
The insoluble nitrogen content of cold water: 28%;
The insoluble nitrogen content of hot water: 14%;
Vigor coefficient: 60%;
Urea nitrogen content: 5.0%;
Biuret Content: 0.7%;
Moisture content: 5.0%.
Claims (3)
1, a kind of urea formadehyde is characterized in that it is to be made of following material molar ratio:
Formaldehyde: urea=1: 1～3.
2, urea formadehyde according to claim 1 is characterized in that its production technique is as follows:
Get in formaldehyde and the urea adding reactor by above-mentioned ratio, react under the following conditions, its ph value of reaction is reached: 4.0～9.0; Temperature of reaction reaches: 30～90 ℃; Reaction times is: 30 minutes～3 hours; Dry filtration through whizzer, dry again, be crushed to 40～80 orders, get final product to moisture content to 1.0～5.0%.
3, urea formadehyde according to claim 1 is characterized in that its key technical indexes is:
Total nitrogen content: 37～40%;
Water soluble nitrogen content: 10～13%;
The insoluble nitrogen content of cold water: 24～28%;
The insoluble nitrogen content of hot water: 11～14%;
Vigor coefficient: 40～60%;
Urea nitrogen content: 1.0～5.0%;
Biuret Content: 0.3～0.7%;
Moisture content: 1.0～5.0%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510048091 CN1789207A (en) | 2005-12-20 | 2005-12-20 | Urea formaldehyde and its production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510048091 CN1789207A (en) | 2005-12-20 | 2005-12-20 | Urea formaldehyde and its production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1789207A true CN1789207A (en) | 2006-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510048091 Pending CN1789207A (en) | 2005-12-20 | 2005-12-20 | Urea formaldehyde and its production process |
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| CN (1) | CN1789207A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101081048B (en) * | 2007-05-24 | 2010-12-08 | 杜云芳 | Method for producing health-care sunflower seed oil rich in selenium |
| CN104609998A (en) * | 2014-12-03 | 2015-05-13 | 辽宁绿源生物肥业有限公司 | Urea formaldehyde (UF) sustained-release fertilizers and production process thereof |
| CN105503277A (en) * | 2015-12-24 | 2016-04-20 | 贵州省化工研究院 | Slow-release urea formaldehyde fertilizer and production method thereof |
-
2005
- 2005-12-20 CN CN 200510048091 patent/CN1789207A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101081048B (en) * | 2007-05-24 | 2010-12-08 | 杜云芳 | Method for producing health-care sunflower seed oil rich in selenium |
| CN104609998A (en) * | 2014-12-03 | 2015-05-13 | 辽宁绿源生物肥业有限公司 | Urea formaldehyde (UF) sustained-release fertilizers and production process thereof |
| CN105503277A (en) * | 2015-12-24 | 2016-04-20 | 贵州省化工研究院 | Slow-release urea formaldehyde fertilizer and production method thereof |
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