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Nitrification inhibitor and preparation method thereof

A technology of nitrification inhibitor and nitrification agent, which is applied in the direction of agricultural gas emission reduction, fertilizer mixture, fertilization equipment, etc., can solve the problems of reducing the ability to inhibit nitrification, loss of active components, and high energy consumption, so as to improve the application effect, Effects of preventing continuous loss and preventing environmental pollution

Inactive Publication Date: 2021-10-22
JIANGSU LONGCHANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a nitrification inhibitor and its preparation method, which can solve the problem that the effect of the nitrification inhibitor in the prior art is greatly affected by the environment, and most of the nitrification inhibitors are easily washed out. , deliquescence, greatly reducing the ability to inhibit nitrification, nitrification inhibitors have high volatility when used, resulting in continuous loss of active components, concentrated sulfuric acid as a catalyst will produce a large amount of waste acid that is difficult to regenerate, and direct discharge of waste acid will cause serious damage. environmental pollution and high energy consumption during application

Method used

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  • Nitrification inhibitor and preparation method thereof
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Examples

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Effect test

Embodiment 1

[0040] A nitrification inhibitor comprises the following components: 10 parts of p-dichlorobenzene, 15 parts of a nitrating agent, 5 parts of a catalyst protecting agent, and 70 parts of a protective colloid.

[0041] P-dichlorobenzene is liquid p-dichlorobenzene with a content of more than 99.5%, the nitrating agent is a mixed acid composed of 98% nitric acid and 85% sulfuric acid, the mass ratio of nitric acid and sulfuric acid is 1.5:1, and the protective colloid is gum arabic powder.

[0042] The catalyst protection agent is a sulfate-type calcium-aluminum binary hydroxide, which is synthesized from raw materials calcium hydroxide, calcium sulfate, and aluminum hydroxide. The mass ratio of calcium hydroxide, calcium sulfate, and aluminum hydroxide is 1:1:1.8.

[0043] A preparation method of nitrification inhibitor, comprising the following steps:

[0044] S1, adding nitrating agent in proportion to the tubular reactor;

[0045] S2, add liquid p-dichlorobenzene, catalyst ...

Embodiment 2

[0051] 15 parts of p-dichlorobenzene, 17 parts of nitrating agent, 3 parts of catalyst protection agent, and 65 parts of protective colloid.

[0052] P-dichlorobenzene is liquid p-dichlorobenzene with a content of more than 99.5%, the nitrating agent is a mixed acid composed of 98% nitric acid and 90% sulfuric acid, the mass ratio of nitric acid and sulfuric acid is 1.5:1, and the protective colloid is gelatin.

[0053] The catalyst protection agent is a sulfate-type calcium-aluminum binary hydroxide, which is synthesized from raw materials calcium hydroxide, calcium sulfate, and aluminum hydroxide. The mass ratio of calcium hydroxide, calcium sulfate, and aluminum hydroxide is 1:1:1.8.

[0054] The preparation method of the specific nitrification inhibitor and the preparation method of the catalyst protection agent are the same as those in Example 1.

Embodiment 3

[0056] 13 parts of p-dichlorobenzene, 22 parts of nitrating agent, 5 parts of catalyst protection agent, and 60 parts of protective colloid.

[0057] P-dichlorobenzene is liquid p-dichlorobenzene with a content of more than 99.5%. The nitrating agent is a mixed acid composed of 98% nitric acid and 87% sulfuric acid. The mass ratio of nitric acid and sulfuric acid is 1.5:1; the protective colloid is gum arabic powder and The combination of gelatin, the mass ratio of gum arabic powder and gelatin is 1:1.6.

[0058] The catalyst protection agent is a sulfate-type calcium-aluminum binary hydroxide, which is synthesized from raw materials calcium hydroxide, calcium sulfate, and aluminum hydroxide. The mass ratio of calcium hydroxide, calcium sulfate, and aluminum hydroxide is 1:1:1.8.

[0059] The preparation method of the specific nitrification inhibitor and the preparation method of the catalyst protection agent are the same as those in Example 1.

[0060] Using liquid p-dichlor...

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Abstract

The invention discloses a nitrification inhibitor and a preparation method thereof, and relates to the technical field of soil improvement. The nitrification inhibitor comprises the following components: p-dichlorobenzene, a nitrating agent, a catalyst protective agent and protective colloid, wherein the nitrating agent is mixed acid composed of nitric acid and sulfuric acid. The preparation method of the nitrification inhibitor comprises the following steps: adding a nitrating agent, p-dichlorobenzene, a catalyst protective agent and a protective colloid into a tubular reactor to obtain a reaction solution; and adding the liquid nitrification inhibitor into a nitrogen fertilizer, and processing the mixture into a fertilizer. The nitrification inhibitor has the advantages that the nitrification inhibitor is high in total yield and good in stability; and the nitrification inhibitor can effectively avoid volatilization loss of the nitrification inhibitor, avoids generation of a large amount of waste acid, can be recycled and can save energy, the nitrogen fertilizer added with the nitrification inhibitor can well inhibit conversion from ammonium nitrogen in the nitrogen fertilizer to nitrate nitrogen, and the utilization rate of the fertilizer is high.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a nitrification inhibitor and a preparation method thereof. Background technique [0002] After chemical nitrogen fertilizer is applied to the soil, it is easy to lose with water in the form of nitrate nitrogen, which is one of the main reasons for the low utilization rate of fertilizers. Excessive nitrate nitrogen content will cause eutrophication of the water body, and in severe cases, it will cause harm to livestock and humans. Delaying the oxidation of ammonium nitrogen to nitrate nitrogen by microorganisms in the soil is an effective way to reduce the leaching of nitrate nitrogen. The most widely used method at present is to use nitrification inhibitors to inhibit the occurrence of nitrogen fertilizer nitrification. [0003] Nitrification inhibitors such as 3,4-dimethylpyrazole phosphate (DMPP), 2-chloro-6 (trichloromethyl) pyridine, and dicyandiamide (DCD) are add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/90
CPCC05G3/90Y02P60/21
Inventor 张剑宇崔伟伟陈树鹏
Owner JIANGSU LONGCHANG CHEM