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

Method for preparing controlled-release fertilizer from potassium feldspar

A technology of controlled-release fertilizer and potassium feldspar, which is applied in the direction of fertilizer mixture, application, fertilization device, etc., can solve the problems of expensive synthetic polymer coated fertilizer, poor slow and controlled release effect, complex production process, etc., and achieve easy industrialization The effect of production, low cost and simple processing technology

Active Publication Date: 2015-11-25
FUJIAN NORMAL UNIV
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the reduction of petroleum resources and the rising price, the use of synthetic polymer coated fertilizers is expensive
These methods generally have defects such as poor slow and controlled release effect, complex production process, and high production cost.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Preparation of coating agent

[0030] components

[0031] Camellia polyphenols 3.5kg

[0032] Potassium persulfate 0.27kg

[0033] Acrylamide 2.25kg

[0034] 12.5kg of water

[0035] Isocyanate 1.8kg;

[0036] preparation steps

[0037] Add potassium persulfate and acrylamide into the reaction kettle, add water, stir and mix evenly, heat to 36°C for 1.5h, adjust pH=4 with sulfuric acid, add camellia oleifera polyphenol, raise the temperature to 80°C for 1.5h, Cool to room temperature; add isocyanate, stir evenly to form the coating agent, set aside.

[0038] 2. Preparation of fertilizer granules

[0039] components

[0040] Potassium nitrate 55kg

[0041] Modified potassium feldspar 35kg

[0042] Clay 10kg;

[0043] preparation steps

[0044] Potassium nitrate, modified potassium feldspar, and clay are mixed according to the above weight ratio, pressed into strips, put into a granulator to granulate, and the particle size range is 7mm.

[0045] 3. Prepar...

Embodiment 2

[0048] 1. Preparation of coating agent

[0049] components

[0050] Camellia polyphenols 4.5kg

[0051] Potassium persulfate 0.25kg

[0052] Acrylamide 2.5kg

[0053] 16kg of water

[0054] Diphenylmethane diisocyanate 1.5kg;

[0055] preparation steps

[0056] Add potassium persulfate and acrylamide into the reaction kettle, add water, stir and mix evenly, heat to 42°C for 2.5 hours, adjust pH=4 with sulfuric acid, add camellia oleifera polyphenols, raise the temperature to 90°C and react for 0.5h, Cool to room temperature; add diphenylmethane diisocyanate, stir evenly to form the coating agent, set aside.

[0057] 2. Preparation of fertilizer granules

[0058] components

[0059] Potassium nitrate 60kg

[0060] Modified potassium feldspar 30kg

[0061] Clay 10kg;

[0062] preparation steps

[0063] Potassium nitrate, modified potassium feldspar, and clay are mixed according to the above weight ratio, pressed into strips, put into a granulator to granulate, and th...

Embodiment 3

[0067] 1. Preparation of coating agent

[0068] components

[0069] Camellia polyphenols 3.5kg

[0070] Potassium persulfate 0.27kg

[0071] Acrylamide 2.0kg

[0072] 12kg of water

[0073] Isocyanate 1.8kg;

[0074] preparation steps

[0075] Add potassium persulfate and acrylamide into the reaction kettle, add water, stir and mix evenly, heat to 38°C for 2.5 hours, adjust pH=4 with sulfuric acid, add camellia oleifera polyphenol, raise the temperature to 70°C for 2 hours, cool to room temperature; add isocyanate, stir evenly to form the coating agent, set aside.

[0076] 2. Preparation of fertilizer granules

[0077] components

[0078] Potassium nitrate 55kg

[0079] Modified potassium feldspar 30kg

[0080] Clay 10kg;

[0081] preparation steps

[0082] Potassium nitrate, modified potassium feldspar, and clay are mixed according to the above weight ratio, pressed into strips, put into a granulator to granulate, and the particle size ranges from 4 to 6 mm.

[0...

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

No PUM Login to View More

Abstract

The invention discloses a method for preparing a controlled-release fertilizer from potassium feldspar, belonging to the field of controlled-release fertilizers. The controlled-release fertilizer is prepared from controlled-release particles and a coating agent, wherein the controlled-release particles are prepared from potassium nitrate, modified potassium feldspar and clay; and the coating agent is prepared from oil tea polyphenol, acrylic amide, potassium peroxodisulfate, isocyanate and the like. The method comprises the steps of mixing acrylic amide, potassium peroxodisulfate and oil tea polyphenol, reacting for a period of time by heating, cooling to the room temperature, and adding toluene diisocyanate to obtain the coating agent; and placing a granulated fertilizer into a rotary drum coating machine, spraying the coating agent on the surfaces of the particles of the fertilizer by using a spray gun, carrying out aeration drying, cooling, sieving, sealing and packaging to obtain the controlled-release fertilizer. The coating agent provided by the invention has the advantages of low cost, environment friendliness, simple preparation method and low equipment investment and is capable of easily realizing industrial production. The prepared coated controlled-release fertilizer is good in controlled-release property and simple in processing technology and can be used for crops such as flowers, fruits and vegetables and economic forests.

Description

technical field [0001] The invention relates to a method for preparing slow and controlled release fertilizers by utilizing potassium feldspar, and belongs to the technical field of slow and controlled release fertilizers. Background technique [0002] Potassium fertilizer is one of the three major elements and plays an important role in agriculture. Potassium in plants is second only to nitrogen. Potassium plays a very important role in plant growth and development. my country is a large agricultural country with a large demand for potash fertilizers. However, my country is a potassium-deficient country with poor potash resources and limited mining technology. At present, a large amount of potash fertilizers in my country is imported from abroad. Potassium fertilizer is an instant fertilizer, which is prone to leaching, volatilization and loss in the soil. Not only the utilization rate is low, but also the application amount is large, resulting in a large waste of potassiu...

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
Inventor 卢玉栋童跃进黄金凤苏梁妹林炎伟
Owner FUJIAN NORMAL UNIV
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com