CN103351222A - Preparation process for urea formaldehyde slow-release and controlled-release compound fertilizer - Google Patents
Preparation process for urea formaldehyde slow-release and controlled-release compound fertilizer Download PDFInfo
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- CN103351222A CN103351222A CN2013102554089A CN201310255408A CN103351222A CN 103351222 A CN103351222 A CN 103351222A CN 2013102554089 A CN2013102554089 A CN 2013102554089A CN 201310255408 A CN201310255408 A CN 201310255408A CN 103351222 A CN103351222 A CN 103351222A
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Abstract
The invention relates to the field of fertilizers for crops and particularly relates to a preparation process for a urea formaldehyde slow-release and controlled-release compound fertilizer. The preparation process is characterized by comprising the following steps of: (1) adding 430kg of urea into a reaction kettle, adding water with the weight equal to 1.5-4 times of mass of the urea and stirring to dissolve the urea, regulating the pH to be 8-9 by utilizing borax and potassium hydroxide, and carrying out stirring reaction for about 1 hour at 75-80 DEG C; (2) adding oxidized starch with the weight equal to 8-10% of that of the urea, stirring for 15-20 minutes, and regulating the pH to be neutral by utilizing calcium oxide, so as to prepare a urea formaldehyde slow-release agent; and (3) weighing solid materials which are crushed to be 80 meshes according to the weight ratio of nitrogen to phosphorus to potassium to middle-trace elements being 4:1:2:1, putting the solid materials into a stirring machine to be uniformly stirred, putting the uniformly stirred materials into a pelletizer, and spraying the urea formaldehyde slow-release agent to carry out pelleting. With the adoption of the technical scheme, the novel slow-release and controlled-release compound fertilizer has the advantages that not only can the utilization rate of the fertilizer be improved, the food security can be guaranteed, and the environmental pollution can be alleviated; lifetime requirements of crops can be met after the fertilizer is applied once, the labor intensity of famers can be greatly alleviated, and the production inputs can be decreased.
Description
Technical field
The present invention relates to farm crop and use fertile field, be specifically related to the preparation technology of the slow controlled-release compound fertilizer of a kind of urea formaldehyde.
Background technology
In China, along with the continuous increase of fertilizer amount, devote exclusive attention to output and lay equal stress on both quality and quantity at agricultural-food, and the requirement of eco-friendly multiple target to be lower, the modification problem of fertilizer just seems particularly important.The exploitation sustained-controll-release fertiliser improves utilization rate of fertilizer, and environmental contamination reduction is simple measure, is particularly suitable for the national conditions of China.
China peasant's education level is low, and peasant household's land area is small and scattered, and planting system is complicated, and mechanization degree is low, and the farmingization service system is difficult to set up and put in place, and rational application of fertilizers and other technical measures are difficult to the service that the peasant provides convenience.In addition, in the developed area, the be unwilling time and efforts that costs a lot of money in the agronomy operation such as topdress of peasant.Therefore, be badly in need of a kind of chemical fertilizer product that integrates rational application of fertilizers, controlled-release technology.Novel slow control release composite fertilizer can not only improve utilization rate of fertilizer, guarantees grain security, environmental contamination reduction, and applied once just can satisfy the crop needs in all one's life, and labour intensity and the reduction production that can greatly alleviate the peasant drop into.
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Summary of the invention
The objective of the invention is for Common compound fertilizer material plant recovery of nutrient low, fertilizer efficiency period is short, the problem of environmental pollution that long-term application is brought, the production technique of the slow controlled-release compound fertilizer of the synthetic urea formaldehyde of a kind of new chemical is provided, utilize the slow controlled-release compound fertilizer of this explained hereafter urea formaldehyde out to belong to novel environment friendly fertilizer, it all plays intelligentized for soil continues, provides desired nutritional reposefully to all kinds of farm crop, vegetables, melon and fruit, have slowly-releasing, controlled release double effects.
The present invention is achieved like this: the preparation technology of the slow controlled-release compound fertilizer of a kind of urea formaldehyde, it is characterized in that 1, add the urea of 430kg in the reactor, add the water stirring and make the urea dissolving, amount of water is 1.5～4 times of urea quality, regulate pH8～9 with borax and potassium hydroxide, press urea and formaldehyde mole ratio 1.2～1.5:1 and add 37% formaldehyde solution of 10kg, 75～80 ℃ of lower stirring reactions approximately 1 hour; 2, adding weight is the Sumstar 190 of amount of urea 8～10%, stirs 15～20min, transfers reactor pH value of solution 4～4.5 with phosphoric acid, continues stirring reactions 0.5～1 hour under 85～90 ℃, regulates pH to neutral with calcium oxide, makes the urea formaldehyde sustained release dosage; 3, nitrogen, phosphorus, potassium and in, trace element takes by weighing by the 4:1:2:1 weight percent and is crushed to each solid materials of 80 purposes; sending into stirrer stirs; the material that stirs is sent into tablets press; and spray the urea formaldehyde sustained release dosage and carry out granulation; material after the balling-up granulation is delivered to drying machine carry out drying; again screening is returned again granulation of tablets press again with fine powder behind the underproof large grain material crushing, and qualified material makes required slow controlled-release compound fertilizer finished product through cooling, metering packing.
Owing to having adopted technique scheme, novel slow control release composite fertilizer can not only improve utilization rate of fertilizer, guarantees grain security, environmental contamination reduction, applied once just can satisfy the crop needs in all one's life, can greatly alleviate peasant's labour intensity and reduce the production input.
Embodiment
The invention will be further described below in conjunction with example.
1, the urea that adds 430kg in the reactor, add the water stirring and make the urea dissolving, amount of water is 1.5～4 times of urea quality, regulate pH8～9 with borax and potassium hydroxide, press urea and formaldehyde mole ratio 1.2～1.5:1 and add 37% formaldehyde solution of 10kg, 75～80 ℃ of lower stirring reactions approximately 1 hour;
2, adding weight is the Sumstar 190 of amount of urea 8～10%, stirs 15～20min, transfers reactor pH value of solution 4～4.5 with phosphoric acid, continues stirring reactions 0.5～1 hour under 85～90 ℃, regulates pH to neutral with calcium oxide, makes the urea formaldehyde sustained release dosage;
3, nitrogen, phosphorus, potassium and in, trace element takes by weighing by the 4:1:2:1 weight percent and is crushed to each solid materials of 80 purposes; sending into stirrer stirs; the material that stirs is sent into tablets press; and spray the urea formaldehyde sustained release dosage and carry out granulation; material after the balling-up granulation is delivered to drying machine carry out drying; again screening is returned again granulation of tablets press again with fine powder behind the underproof large grain material crushing, and qualified material makes required slow controlled-release compound fertilizer finished product through cooling, metering packing.
1, use is oxidization starch modified, and the urea formaldehyde sustained release dosage that makes not only viscosity is suitable, and without free formaldehyde, has solved for a long time safety and environmental protection problem of puzzlement.Improve simultaneously the slow control release composite fertilizer utilization ratio of urea formaldehyde, reduced widespread pollution from the overuse of fertilizers and pesticides in rural area, strengthened the resistance of plant, improved crops quality.
2, use borax, potassium hydroxide, phosphoric acid and calcium oxide conditioned reaction liquid pH value, and add trace element, improved the nutrient content of the slow controlled-release compound fertilizer of urea formaldehyde, can satisfy the demand of crop centering, trace element.
3, urea aldehyde slow-release compound fertilizer is take the urea formaldehyde sustained release dosage as skeleton, do not use clay, can effectively prevent the quickly disintegrated phenomenon of fertiliser granulates water-swelling, has particularly nitrogen sustained release performance of good nutrient, improved its total nutrient amount, and balling ratio is high in the production process, pellet hardness also large (＞18N).
Claims (1)
1. the preparation technology of the slow controlled-release compound fertilizer of a urea formaldehyde, it is characterized in that 1, add the urea of 430kg in the reactor, add the water stirring and make the urea dissolving, amount of water is 1.5～4 times of urea quality, regulate pH8～9 with borax and potassium hydroxide, press urea and formaldehyde mole ratio 1.2～1.5:1 and add 37% formaldehyde solution of 10kg, 75～80 ℃ of lower stirring reactions approximately 1 hour; 2, adding weight is the Sumstar 190 of amount of urea 8～10%, stirs 15～20min, transfers reactor pH value of solution 4～4.5 with phosphoric acid, continues stirring reactions 0.5～1 hour under 85～90 ℃, regulates pH to neutral with calcium oxide, makes the urea formaldehyde sustained release dosage; 3, nitrogen, phosphorus, potassium and in, trace element takes by weighing by the 4:1:2:1 weight percent and is crushed to each solid materials of 80 purposes; sending into stirrer stirs; the material that stirs is sent into tablets press; and spray the urea formaldehyde sustained release dosage and carry out granulation; material after the balling-up granulation is delivered to drying machine carry out drying; again screening is returned again granulation of tablets press again with fine powder behind the underproof large grain material crushing, and qualified material makes required slow controlled-release compound fertilizer finished product through cooling, metering packing.
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Cited By (13)
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| CN103936524A (en) * | 2014-05-08 | 2014-07-23 | 河南力浮科技有限公司 | Method for producing urea formaldehyde controlled-release compound fertilizer |
| CN104072296A (en) * | 2014-07-08 | 2014-10-01 | 句容谷歌庄园现代农业科技发展有限公司 | Special fertilizer for ginkgoes as well as preparation method and application of special fertilizer |
| CN104072297A (en) * | 2014-07-08 | 2014-10-01 | 句容谷歌庄园现代农业科技发展有限公司 | Special fertilizer for poplar tree, and preparation method and application thereof |
| CN104086283A (en) * | 2014-06-11 | 2014-10-08 | 句容谷歌庄园现代农业科技发展有限公司 | Urea formaldehyde sustained-release fertilizer special for tea and preparation method of the fertilizer |
| CN104276871A (en) * | 2014-10-23 | 2015-01-14 | 贵州省化工研究院 | Preparation method of urea-formaldehyde slow release fertilizer |
| CN104291305A (en) * | 2014-09-19 | 2015-01-21 | 贵阳中化开磷化肥有限公司 | Production method of preparing tricalcium phosphate and byproduct special fertilizer for mangos |
| CN104692950A (en) * | 2015-03-17 | 2015-06-10 | 山东农业大学 | Preparation method of biological carbon sustained-release compound fertilizer |
| CN104744164A (en) * | 2015-03-20 | 2015-07-01 | 山东农业大学 | Powdery potassium chloride granulation method taking synthesised urea resin as binder |
| CN104909881A (en) * | 2015-05-27 | 2015-09-16 | 深圳市芭田生态工程股份有限公司 | Additive for preventing potassium fertilizer from powder generation, and application method thereof |
| CN105315048A (en) * | 2014-05-30 | 2016-02-10 | 中化山东肥业有限公司 | Process for preparing urea formaldehyde slow-release fertilizer through diluted solution method |
| CN109644999A (en) * | 2019-02-18 | 2019-04-19 | 齐齐哈尔盛泽农药有限公司 | A kind of preparation method of slow released herbicide micro-capsule |
| CN112624851A (en) * | 2020-12-30 | 2021-04-09 | 广西金裕隆农药化工有限公司 | Preparation method of urea formaldehyde slow-release granular pesticide fertilizer |
| CN115286457A (en) * | 2022-08-26 | 2022-11-04 | 湖北四季丰收肥业股份有限公司 | Formula and preparation method of efficient biological pesticide fertilizer |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103936524A (en) * | 2014-05-08 | 2014-07-23 | 河南力浮科技有限公司 | Method for producing urea formaldehyde controlled-release compound fertilizer |
| CN105315048A (en) * | 2014-05-30 | 2016-02-10 | 中化山东肥业有限公司 | Process for preparing urea formaldehyde slow-release fertilizer through diluted solution method |
| CN104086283A (en) * | 2014-06-11 | 2014-10-08 | 句容谷歌庄园现代农业科技发展有限公司 | Urea formaldehyde sustained-release fertilizer special for tea and preparation method of the fertilizer |
| CN104086283B (en) * | 2014-06-11 | 2016-06-08 | 句容谷歌庄园现代农业科技发展有限公司 | A kind of special urea aldehyde slow release fertilizer of tealeaves and its preparation method |
| CN104072296B (en) * | 2014-07-08 | 2016-04-27 | 句容谷歌庄园现代农业科技发展有限公司 | A kind of ginkgo dedicated fertilizer and its preparation method and application |
| CN104072296A (en) * | 2014-07-08 | 2014-10-01 | 句容谷歌庄园现代农业科技发展有限公司 | Special fertilizer for ginkgoes as well as preparation method and application of special fertilizer |
| CN104072297A (en) * | 2014-07-08 | 2014-10-01 | 句容谷歌庄园现代农业科技发展有限公司 | Special fertilizer for poplar tree, and preparation method and application thereof |
| CN104072297B (en) * | 2014-07-08 | 2016-06-29 | 句容谷歌庄园现代农业科技发展有限公司 | A kind of poplar dedicated fertilizer material and its preparation method and application |
| CN104291305A (en) * | 2014-09-19 | 2015-01-21 | 贵阳中化开磷化肥有限公司 | Production method of preparing tricalcium phosphate and byproduct special fertilizer for mangos |
| CN104291305B (en) * | 2014-09-19 | 2016-07-06 | 贵州开磷集团股份有限公司 | A kind of production method preparing tricalcium phosphate by-product Fructus Mangifera Indicae special fertilizer |
| CN104276871A (en) * | 2014-10-23 | 2015-01-14 | 贵州省化工研究院 | Preparation method of urea-formaldehyde slow release fertilizer |
| CN104692950A (en) * | 2015-03-17 | 2015-06-10 | 山东农业大学 | Preparation method of biological carbon sustained-release compound fertilizer |
| CN104744164A (en) * | 2015-03-20 | 2015-07-01 | 山东农业大学 | Powdery potassium chloride granulation method taking synthesised urea resin as binder |
| CN104744164B (en) * | 2015-03-20 | 2018-01-16 | 山东农业大学 | Synthesize the powdery potassium chloride prilling process that Lauxite is binding agent |
| CN104909881A (en) * | 2015-05-27 | 2015-09-16 | 深圳市芭田生态工程股份有限公司 | Additive for preventing potassium fertilizer from powder generation, and application method thereof |
| CN109644999A (en) * | 2019-02-18 | 2019-04-19 | 齐齐哈尔盛泽农药有限公司 | A kind of preparation method of slow released herbicide micro-capsule |
| CN112624851A (en) * | 2020-12-30 | 2021-04-09 | 广西金裕隆农药化工有限公司 | Preparation method of urea formaldehyde slow-release granular pesticide fertilizer |
| CN115286457A (en) * | 2022-08-26 | 2022-11-04 | 湖北四季丰收肥业股份有限公司 | Formula and preparation method of efficient biological pesticide fertilizer |
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Application publication date: 20131016 |