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

Coated slow-release organic fertilizer and preparation method thereof

An organic fertilizer, slow-release technology, applied in layered/coated fertilizers, fertilizer mixtures, nitrogen fertilizers, etc., can solve the problems of easy peeling, poor slow-release performance, adverse effects of slow-release performance, etc., to avoid wear consumption, The effect of good protection and isolation performance

Inactive Publication Date: 2020-04-10
NANJING HANERSI BIOLOGY TECHNOLOGY CO LTD
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the outer coating of the existing coated slow-release fertilizer is easy to peel off due to mutual friction during transportation, which adversely affects its slow-release performance. In practical applications, the slow-release performance is relatively poor.

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 slow-release organic fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A coated slow-release organic fertilizer is composed of urea nuclei with a particle size of 1-5 mm and a coating, and the coating is composed of an inner slow-release layer and an outer isolation layer;

[0034] The sustained-release layer comprises the following components in weight percent:

[0035] Carbon-based loaded layered double hydroxide 62%, chitosan 30%, tung oil 8%.

[0036] The isolation layer is styrene-acrylic emulsion-paraffin-phosphogypsum material.

[0037] The preparation method of carbon-based loaded layered double hydroxide is as follows:

[0038] (1) Wash the peanut shells, dry them, crush them, and sieve them, then add them to concentrated phosphoric acid at 50°C for 10 hours and then filter them out. The solid-to-liquid mass ratio of peanut shells to concentrated phosphoric acid is 1:8. Stir in dilute hydrochloric acid for 35 minutes, then dry, place in a muffle furnace and heat up to 120°C for 3 hours, then heat up to 200°C for 2 hours at a rat...

Embodiment 2

[0045] A coated slow-release organic fertilizer is composed of urea nuclei with a particle size of 1-5 mm and a coating, and the coating is composed of an inner slow-release layer and an outer isolation layer;

[0046] The sustained-release layer comprises the following components in weight percent:

[0047]Carbon-based loaded layered double hydroxide 60%, chitosan 35%, tung oil 5%.

[0048] The isolation layer is styrene-acrylic emulsion-paraffin-phosphogypsum material.

[0049] The preparation method of carbon-based loaded layered double hydroxide is as follows:

[0050] (1) Wash the peanut shells, dry them, crush them, and sieve them, then add them to concentrated phosphoric acid at 60°C for 5 hours and then filter them out. The solid-to-liquid mass ratio of peanut shells to concentrated phosphoric acid is 1:8. Stir in dilute hydrochloric acid for 30 minutes, then dry, place in a muffle furnace and heat up to 130°C for 2 hours, then heat up to 180°C for 2 hours at a rate ...

Embodiment 3

[0057] A coated slow-release organic fertilizer is composed of urea nuclei with a particle size of 1-5 mm and a coating, and the coating is composed of an inner slow-release layer and an outer isolation layer;

[0058] The sustained-release layer comprises the following components in weight percent:

[0059] Carbon-based loaded layered double hydroxide 65%, chitosan 30%, tung oil 5%.

[0060] The isolation layer is styrene-acrylic emulsion-paraffin-phosphogypsum material.

[0061] The preparation method of carbon-based loaded layered double hydroxide is as follows:

[0062] (1) Wash the peanut shells, dry them, crush them, and sieve them, then add them to concentrated phosphoric acid at 60°C for 5 hours and then filter them out. The solid-to-liquid mass ratio of peanut shells to concentrated phosphoric acid is 1:6. Stir in dilute hydrochloric acid for 30 minutes, then dry it, place it in a muffle furnace and heat it up to 130°C for 1 hour, then heat it up to 200°C for 2 hour...

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 sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a coated slow-release organic fertilizer and a preparation method thereof, and relates to the field of fertilizers. The organic fertilizer is composed of a urea core body with the particle size of 1-5 mm and a coating film. The coating film is composed of a slow-release layer on the inner side and an isolation layer on the outer side. The slow release layer comprises 60-90%of carbon-based loaded layered double hydroxides according to the total mass; the isolation layer is made of a styrene-acrylic emulsion-paraffin-phosphogypsum material; tests show that the slow-release performance of a fertilizer without the isolation layer is greatly reduced after stirring and mixing and the fertilizer efficiency is completely released after 16 days, while the slow-release performance of the fertilizer containing the isolation layer is not influenced by stirring and mixing, so that the isolation layer can well protect the fertilizer, and the influence of collision and abrasion on the slow-release performance of the fertilizer is avoided.

Description

technical field [0001] The invention relates to the field of fertilizers, in particular to a coated slow-release organic fertilizer and a preparation method thereof. Background technique [0002] N, P, and K in fertilizers are the three main nutrient elements necessary for crop growth and development. However, due to the soluble characteristics of today's commercial fertilizers, the release rate of N, P, and K nutrients per unit time is much greater than the absorption rate of crops. It has caused problems such as low crop nutrient utilization rate, crop quality and yield decline, waste of resources, and environmental pollution. For example, proper supply of N nutrients can promote plant growth and increase yield, but excessive and inappropriate N supply can cause nitrate accumulation in crops, which is harmful to human health. Generally, cereals and vegetable crops can only absorb about 33% of the total amount of N in fertilizers. Even the more common urea N fertilizers ha...

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
IPC IPC(8): C05G3/40C05G5/30C05G3/00
CPCC05C9/00C05G3/00
Inventor 谢四川曹军智
Owner NANJING HANERSI BIOLOGY TECHNOLOGY CO LTD
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