Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Coated controlled release fertilizer and preparation method thereof

A technology of coating controlled-release fertilizer and coating is applied in the field of chemical compound fertilizer, which can solve the problems of short duration of controlled-release coating of coated controlled-release fertilizer, and achieve the effects of convenient operation, prolonging controlled-release time and prolonging fertilizer efficiency.

Inactive Publication Date: 2018-06-01
SHENZHEN BATIAN ECOTYPIC ENG
View PDF12 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a coated controlled-release fertilizer and a preparation method thereof for the problem that the controlled-release time of the coated controlled-release fertilizer is short.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Coated controlled release fertilizer and preparation method thereof
  • Coated controlled release fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The preparation method of the above-mentioned coated controlled-release fertilizer comprises the following steps:

[0032] S10. Heating the fertilizer core to 60° C. to 80° C., and the fertilizer core is nitrogen fertilizer.

[0033] In one of the embodiments, the nitrogen fertilizer is selected from at least one of urea and urea-based compound fertilizer.

[0034] In one embodiment, the time for heating and raising the temperature of the fertilizer is 20 minutes to 40 minutes.

[0035] Specifically, in this embodiment, the heat treatment of the fertilizer is carried out in a drum device. The rotating speed of the drum device is set at 2r / min~15r / min.

[0036] S20. Mix the isocyanate, polyol, curing catalyst and additives uniformly in a mixer to obtain a mixture.

[0037] S30 , coating the fertilizer core with the mixture at 60° C. to 80° C.

[0038] In one embodiment, the coating treatment is carried out in a drum device, the coating treatment time is 10 minutes to...

Embodiment 1

[0046] Select 970g of urea as the fertilizer core, the urea particle size is 2.0mm-4.8mm, put it in the drum device, the rotating speed of the drum device is set to 12r / min, heat treatment for 20min until the temperature of nitrogen fertilizer is 60°C; weigh 21g Toluene diisocyanate, 9g of glycerol, 0.03g of curing catalyst triethanolamine and 0.2g of additive diaminophenylphosphate, mixed evenly, added to the drum device, heated at 60°C for 20min to obtain coated controlled-release fertilizer.

Embodiment 2

[0048] Select 970g of urea as the fertilizer core, the particle size of urea is 2.0mm-4.8mm, put it in the drum device, the rotating speed of the drum device is set to 10r / min, heat treatment for 30min until the temperature of nitrogen fertilizer is 70°C; weigh 28g Polyphenyl polymethylene polyisocyanate, 15g of castor oil polyol, 0.03g of curing catalyst dibutyltin dilaurate and 0.4g of additive caproyl hydroxamic acid, mix well and add to the drum device, at 70 ℃ Under heating for 15 minutes, the coated controlled-release fertilizer is obtained.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

Coated controlled release fertilizer comprises a fertilizer core and a coat, wherein the fertilizer core is nitrogen fertilizer, and the use amount of the nitrogen fertilizer is 96-97 parts by mass; the coat is a polyurethane material coating the surface of the fertilizer core; the coat is prepared from raw materials in parts by mass as follows: 2.1-2.8 parts of isocyanate, 0.9-2.1 parts of polyalcohol, 0.03-0.15 parts of a curing catalyst and 0.1-0.8 parts of an additive, and the additive is selected from at least one of diaminobenzene phosphate, N-thiophosphoric triamide and acetohydroxamicacid. According to the coated controlled release fertilizer, the controlled release effect of the coated controlled release fertilizer can be effectively improved, the controlled release time of the coated controlled release fertilizer can be prolonged, the fertilizer efficiency is prolonged and loss of nitrogen is reduced.

Description

technical field [0001] The invention relates to the technical field of chemical compound fertilizers, in particular to a coated controlled-release fertilizer and a preparation method thereof. Background technique [0002] Coated controlled-release fertilizer is a new type of fertilizer, which mainly coats the surface of fertilizer particles through a certain process. When the prepared coated controlled-release fertilizer is applied in the soil, the active ingredients in the fertilizer granules need to enter the soil through the coating layer on the surface, so the release rate of the active ingredients in the fertilizer can be controlled to provide nutrients for crops stably and continuously. [0003] However, the currently commonly used coated controlled-release fertilizers can only maintain a good controlled-release effect in a short period of time, resulting in the loss of nutrients and reducing the utilization rate of fertilizers. Contents of the invention [0004] Ba...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05C9/00C05G3/00C05G5/37
Inventor 李峰张建军陈文哲
Owner SHENZHEN BATIAN ECOTYPIC ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com