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Method for structural reconstruction of hydrated aluminum chloroaluminate to synthesize pesticide controlled release agent

A technology for hydrating calcium chloroaluminate and slow-release agent, which is applied in the directions of botanical equipment and methods, biocides, animal repellents, etc., can solve problems such as few reports in literature, and achieve simple synthesis, easy separation and repeatability. Utilization, the effect of large specific surface area

Inactive Publication Date: 2015-03-11
JIANGSU LONGCHANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relevant literature reports mostly involve the adsorption and removal efficiency of hydrotalcite materials for anionic pollutants. For the removal of heavy metals in water by hydrotalcite, especially the removal of heavy metal pollutants in the form of cations, there are few reports in the literature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation method of calcium chloroaluminate hydrate structure reconstruction synthetic pesticide sustained-release agent:

[0028] (1) First prepare calcined calcium chloroaluminate hydrate: take the synthesized calcium chloroaluminate hydrate dry powder and put it into a crucible, raise it to 500°C at a speed of 10°C / 30min, and calcinate at a constant temperature for 4 hours to obtain calcined Calcium chloroaluminate hydrate, namely calcined calcium chloroaluminate;

[0029]Take 1g calcined calcium chloroaluminate hydrate and disperse it into 40ml ethanol / water (volume ratio (1:1)) solution containing 0.8mol / ml indolebutyric acid. After testing, the pH of the suspension is greater than 8.5 , with HNO 3 Adjust to 8.0, then react at room temperature for three days, filter, and wash twice with deionized water to obtain the indolebutyric acid nano-sustained release agent.

[0030] Based on the pesticide slow-release agent produced by the method of this embodiment, the ...

Embodiment 2

[0032] A kind of calcium chloroaluminate hydrate structure reconstruction synthetic pesticide slow-release agent method:

[0033] On the basis of Example 1, 1 g of calcined calcium chloroaluminate prepared in Example 1 was taken and dispersed into 100 ml of aqueous solution containing 0.5 g of dicamba. pH of the suspension with HNO 3 Adjust to 8.0. Then, react at room temperature for 24 hours. Filter and wash with water to obtain the dicamba nano sustained-release agent.

[0034] Based on the pesticide slow-release agent produced by the method of this embodiment, the pesticide slow-release agent is simple to synthesize, low in cost, easy to separate and reusable, and uses hydrotalcite to remove heavy metals in water, with a large specific surface area and stronger surface adsorption capacity. significantly.

Embodiment 3

[0036] A kind of calcium chloroaluminate hydrate structure reconstruction synthetic pesticide slow-release agent method:

[0037] On the basis of Example 1, 1 g of calcined calcium chloroaluminate prepared in Example 1 was dispersed into 60 ml of aqueous solution containing 0.1 g of 2,4-dichlorophenoxyacetic acid. The pH of the suspension was adjusted to 8.0 with HNO3. Then, react at room temperature for 12 hours. Filter and wash with water to obtain the 2,4-D nano sustained-release agent.

[0038] Based on the pesticide slow-release agent produced by the method of this embodiment, the pesticide slow-release agent is simple to synthesize, low in cost, easy to separate and reusable, and uses hydrotalcite to remove heavy metals in water, with a large specific surface area and stronger surface adsorption capacity. significantly.

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PUM

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Abstract

The invention discloses a method for structural reconstruction of hydrated aluminum chloroaluminate to synthesize pesticide controlled release agent. The method includes: firstly calcining synthetic hydrated aluminum chloroaluminate dry powder in a crucible to obtain calcined aluminum chloroaluminate; then dispersing the calcined aluminum chloroaluminate in a solution containing original pesticide to obtain a suspension solution; then adjusting the pH of the obtained suspension solution with an acidity adjustment solution, and finally carrying out reaction, filtering, washing and drying so as to obtain the nano-controlled release agent. According to the method for structural reconstruction of hydrated aluminum chloroaluminate to synthesize pesticide controlled release agent, the pesticide controlled release agent has the characteristics of simple synthesis, low cost, easy separation and reusability. Hydrotalcite is employed to remove heavy metals in water, the specific surface area is large, and stronger adsorption capacity makes the adsorption effect remarkable. The method eliminates the metal salt inorganic anions competing with organic anions intercalation, and can be used for preparation of pillared hydrotalcite. The calcined hydrotalcite has very good adsorption and regeneration effects.

Description

technical field [0001] The invention relates to a method for synthesizing a pesticide slow-release agent by reconstructing the structure of calcium chloroaluminate hydrate, and belongs to the field of chemically synthesized pesticide slow-release agents. Background technique [0002] Layered double metal hydroxides, LDHs for short, are a class of anionic layered compounds, also known as hydrotalcites, which have acidic and basic characteristics, memory effect, exchangeability of interlayer anions and microporous structure. Hydrotalcite-like compounds have attracted a great deal of interest since the first patent on their preparation of hydrogenation catalysts in 1970. It is widely used in catalysis, adsorption, ion exchange and other fields. In recent years, with the further research on this kind of material, its application in medicine, coatings, pesticides, functional polymer materials, oil field development and so on has been opened up. [0003] Layered double hydroxides...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/08
Inventor 赵雪松刘朋昕佘道才王敏芝
Owner JIANGSU LONGCHANG CHEM