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

Preparation method of a slow-release degradable film-coated porous material of fertilizer

A porous material and degradable film technology, applied in the field of porous material preparation, can solve the problems of variation and other biological pollution, high cost of graphene, complicated process, etc., and achieve the effect of prolonging the effective release period, increasing the retention time, and simple process steps

Active Publication Date: 2022-04-15
CHINA NONFERROUS METAL (GUILIN) GEOLOGY & MINING CO LTD +1
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the excessive use of organic pesticides and chemical fertilizers in a short period of time has caused non-negligible pollution and damage to the soil environment, researchers must find environmentally friendly and efficient materials that can reduce the number of pesticides and fertilizers used
[0004] In the existing technology, such as the invention patent CN107857666A discloses a method for preparing organic fertilizers that enhance soil insect resistance, which is prepared by extracting traditional Chinese medicines. Traditional Chinese medicines are relatively expensive, and the extraction process is complicated, so it is difficult to popularize in large quantities.
And the slow-release treatment of the fertilizer is not carried out, and the long-term effect of the fertilizer is not ideal
[0005] The existing medicine-fertilizer integration technology, such as the invention patent CN108530220A, discloses an eco-friendly medicine-fertilizer mixture and its preparation method. The fertilizer and the sugar-making waste liquid are soaked for 3 days, evaporated and concentrated, and then granulated. The viscosity is too high , it is difficult to granulate, and it is difficult to disperse the fertilizer evenly, which increases the possibility of uneven fertilization
[0006] A mixture of medicine and fertilizer containing slow-release materials, such as a graphene composite controlled-release medicine fertilizer granule and its preparation method disclosed in the invention patent number CN109053289A, although the release of the medicine is slowly controlled, the cost of graphene is too high and it is not degradable , leaving it in the soil will cause secondary pollution, lack of practicability
[0007] For example, patent CN109880763A discloses a preparation method and application of a highly active biopesticide microcapsule sustained-release agent. The use of biological strains in biopesticides has great advantages in environmental protection, but there are risks of biological contamination such as variation, and the microcapsules The production cost is high, the process is complicated, and it is difficult to further promote the use
[0008] For example, the patent CN109966505A discloses a nano-channel type natural sustained and controlled release carrier material and its preparation method. The raw material is shrimp and crab shells, but the source of shrimp and crab shells is limited by regions and seasons, and the source is not wide enough.
Secondly, the alcohol-alkali method is used to make pores, but the selected pesticides cannot coexist with the alkaline solution, which loses its practicability

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
  • Preparation method of a slow-release degradable film-coated porous material of fertilizer
  • Preparation method of a slow-release degradable film-coated porous material of fertilizer
  • Preparation method of a slow-release degradable film-coated porous material of fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1. Preparation of porous carbonized material:

[0042] 1) Weigh plant ash as raw material, dry at 70°C for 2 hours, mechanically pulverize, pass through a 10-mesh sieve, and superfinely pulverize through a 250-mesh sieve for later use;

[0043] 2) Weighing 45wt% of plant ash powder in proportion, 35wt% of a configured mass fraction of 8% potassium hydroxide alkali solution, and 20wt% of pore-enhancing agent 15% polyvinylpyrrolidone;

[0044] 3) Soak the pulverized plant ash in the mixed solution for 5 hours, put it into the drier for ammoniation and dispersion treatment with ammonia gas for 1 hour;

[0045] 4) Put the plant ash powder into the tube furnace for low-temperature carbonization, set the temperature to rise from 100°C / h to 300°C for 3 hours, during which the protective gas nitrogen is introduced, cooled to room temperature and taken out for later use.

[0046] 2. Pesticide loading of porous materials:

[0047] 1) Weigh 1500ml of 20% sodium pentachlorophenat...

Embodiment 2

[0059] 1. Preparation of porous carbonized material:

[0060] 1) Weigh plant ash as raw material, dry at 70°C for 2.5 hours, mechanically pulverize, pass through a 10-mesh sieve, and superfinely pulverize through a 250-mesh sieve for later use;

[0061] 2) Weigh 60wt% of plant ash powder in proportion, 30wt% of the configured mass fraction 8% potassium hydroxide alkali solution, and 10wt% of pore-enhancing agent 3% urea solution;

[0062] 3) Soak the pulverized plant ash in the mixed solution for 5 hours, put it into the drier for 1.5 hours for ammonification and dispersion treatment with ammonia gas;

[0063] 4) Put the plant ash powder into the tube furnace for low-temperature carbonization, set the temperature to rise from 100°C / h to 300°C for 3 hours, during which the protective gas nitrogen is introduced, cooled to room temperature and taken out for later use.

[0064] 2. Pesticide loading of porous materials:

[0065] 1) Weigh 1500ml of 20% sodium pentachlorophenate aq...

Embodiment 3

[0077] 1. Preparation of porous carbonized material:

[0078] 1) Weigh plant ash as raw material, dry at 73°C for 2 hours, mechanically pulverize, pass through a 10-mesh sieve, and superfinely pulverize through a 250-mesh sieve for later use;

[0079] 2) Weighing 55wt% of the plant ash powder in proportion, 30wt% of the configured mass fraction 8% potassium hydroxide alkali solution, and 15wt% of the pore-enhancing agent 3% urea solution;

[0080] 3) Soak the pulverized plant ash powder in the mixed solution for 5.5 hours, wash it with a large amount of distilled water until the pH value is 7-9, and put it into the dryer for 1.5 hours of ammonification and dispersion treatment with ammonia gas;

[0081] 4) Put the plant ash powder into the tube furnace for low-temperature carbonization, set the temperature to rise from 100°C / h to 300°C for 3 hours, during which the protective gas nitrogen is introduced, cooled to room temperature and taken out for later use.

[0082] 2. Pesti...

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 preparation method of a slow-release and degradable film-coated porous material of medicinal fertilizer, which comprises the following steps: pulverizing plant ash, soaking in a wall-breaking agent and a pore-enhancing agent, and performing ammoniation and carbonization to obtain a porous material. Materials; soak the porous material in the pesticide solution, and ultrasonically disperse to obtain the porous material loaded with pesticide; heat the wheat husk and starch in a water bath, and then add modifying aids, plasticizers, distilled water, film-forming aids, and pesticide-loaded Stir the porous material evenly to complete the coating of the slow-release degradable film; dry and sieve the powder coated with the slow-release degradable film to obtain the porous material of the slow-release degradable film-coated fertilizer. The invention efficiently retains the long-term effect of the drug, and uses degradable and environmentally friendly raw materials to make a slow-release film to control the release and adhesion of the drug. After the slow-release film is damaged, the adsorption carrier can be used as a fertilizer to achieve long-term and slow release of the drug fertilizer. The effect of reducing the number of fertilizer application.

Description

technical field [0001] The invention relates to the technical field of preparation of pesticides and fertilizers, and more specifically relates to a preparation method of a porous material for slow-release degradable film-coated fertilizers. Background technique [0002] Plant ash is a recognized environmental protection material. It is the ashes formed after burning firewood. It is a quick-acting potassium fertilizer with a loose texture. It generally contains 5% to 15% of available potassium, and also contains calcium, magnesium, sulfur, phosphorus, and iron. Moreover, it has the functions of sterilization and disinfection and pest control, and its excellent performance characteristics make it a hot material for researchers. The study found that plant ash itself has an internal pore structure, which can be used as an adsorption carrier, and the effect is very ideal. [0003] As a large agricultural country, China has always been concerned about agricultural issues, and th...

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 Patents(China)
IPC IPC(8): A01N25/00
CPCC05D1/00C05G3/00
Inventor 王立惠李硕夏村村卢宗柳张小文
Owner CHINA NONFERROUS METAL (GUILIN) GEOLOGY & MINING 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