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Method for preparing porous material of slow-release degradable film wrapped medicine fertilizer

A technology of porous materials and degradable films, applied in inorganic fertilizers, fertilizer mixtures, potash fertilizers, etc., can solve the problems of unsatisfactory long-term effect of fertilizers, variation and other biological pollution, complex processes, etc., to achieve large-scale production promotion, prolonged effective The effect of release period and simple process steps

Active Publication Date: 2019-12-20
CHINA NONFERROUS METAL (GUILIN) GEOLOGY & MINING CO LTD +1
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  • 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

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  • Method for preparing porous material of slow-release degradable film wrapped medicine fertilizer
  • Method for preparing porous material of slow-release degradable film wrapped medicine fertilizer
  • Method for preparing porous material of slow-release degradable film wrapped medicine 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...

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Abstract

The invention discloses a method for preparing a porous material of a slow-release degradable film wrapped medicine fertilizer. The method comprises the following steps: crushing plant ash, soaking the plant ash into a wall breaking agent and a plus pore agent, and performing ammoniation and carbonization so as to obtain a porous material; soaking the porous material into a pesticide solution, andperforming ultrasonic dispersion so as to obtain a pesticide supported porous material; performing water bath heating on wheat bran and starch, sequentially adding a modification aid, a plasticizer,distilled water, a film formation aid and the pesticide supported porous material, and performing uniform stirring so as to obtain a wrapping slow-release degradable film; and drying and screening powder of the wrapping slow-release degradable film, so as to obtain the porous material of the slow-release degradable film wrapped medicine fertilizer. By adopting the method, the long lasting effect of a medicine is efficiently maintained, degradable environment-friendly raw materials are prepared into the slow-release film to control release and viscosities of medicines, an adsorption carrier canalso function as a fertilizer to take effects into play after the slow-release film is broken, an effect of long-lasting and slow release of medicine fertilizers can be achieved, and the applicationtimes of the medicine fertilizers can be reduced.

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

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
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
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