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Stability urea and preparation method thereof

A technology of stability and urea, which is applied in the direction of fertilizer mixture, fertilization device, application, etc., can solve the problems of short fertilizer effect period, urea sticking, high price, etc., and achieve the effect of improved utilization rate, simple process and large production capacity

Active Publication Date: 2014-07-02
武威金仓生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of low utilization rate of common urea and short fertilizer effect period; n-butylthiophosphoric triamide and 2-chloro-6-trichloromethylpyridine cannot be used at high temperature and prepared by dissolving these two substances with organic solvents The stable urea has the problems that it is easy to cause the urea to stick after absorbing moisture, the price is high, the production process is complicated, and the organic solvent has risks to people and soil, and a stable urea and its preparation method are provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0007] Specific embodiment one: This embodiment is that a kind of stable urea is prepared from n-butyl thiophosphoric triamide, 2-chloro-6-trichloromethylpyridine, humic acid and urea, and the n-butyl The mass ratio of base thiophosphoric triamide and 2-chloro-6-trichloromethylpyridine is 1:(0.5~10); the mass ratio of described n-butylthiophosphoric triamide and humic acid is 1:(2-200); the mass ratio of n-butylthiophosphoric triamide to urea is 1:(1000-100000).

[0008] In this embodiment, humic acid is used to react with urea at a temperature of 45°C to 60°C to form a dense film layer, and n-butylthiophosphoric triamide and 2-chloro-6-trichloromethylpyridine are wrapped in the film layer In this process, stable urea is obtained. Compared with ordinary urea, the utilization rate of this stable urea is increased by more than 40%, and the fertilizer effect period is extended from 35 days to more than 120 days.

specific Embodiment approach 2

[0009] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the mass ratio of described n-butyl thiophosphoric triamide and 2-chloro-6-trichloromethylpyridine is 1:(2 ~8). Others are the same as the first embodiment.

specific Embodiment approach 3

[0010] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the mass ratio of n-butylphosphorothioate to humic acid is 1:(20-150). Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides stability urea and a preparation method thereof, and relates to urea and the preparation method thereof. The invention aims at solving the problems that the utilization rate of common urea is low, the fertilizer efficiency period of the common urea is short, N-(n-butyl) thiophosphoric-triamide and 2-chlorin-6-nitrapyrin cannot be used at a high temperature, and when an organic solvent is used for dissolving the N-(n-butyl) thiophosphoric-triamide and the 2-chlorin-6-nitrapyrin so as to prepare the stability urea, the urea becomes adhesive after absorbing moisture and is high in price and complicated in a production technology, and the organic solvent is risky for people and soil. The stability urea is prepared from the N-(n-butyl) thiophosphoric-triamide, the 2-chlorin-6-nitrapyrin, humic acid and urea. The preparation method comprises the following steps: 1, carrying out preheating treatment so as to obtain preheated urea; 2, firstly mixing the N-(n-butyl) thiophosphoric-triamide, the 2-chlorin-6-nitrapyrin and the humic acid, and then carrying out grinding treatment so as to obtain a mixture; and 3, adding the mixture to the preheated urea, carrying out heat preservation, stirring, sieving, and cooling to room temperature, thus obtaining the stability urea. The preparation method is mainly used for preparing the stability urea.

Description

technical field [0001] The invention relates to a stable urea and a preparation method thereof. Background technique [0002] Urea is currently the main type of nitrogen fertilizer due to its high nitrogen content, stable performance, and easy storage. Urea is directly applied to farmland, or mixed with other nutrients such as phosphorus and potassium, and then used as a blended fertilizer or compound (mixed) fertilizer. During the use of urea, there are problems such as short fertilizer effect period and low utilization rate. The short fertilizer effect period causes farmers to need to topdress many times, resulting in huge waste of manpower, and the low utilization rate causes huge direct economic losses and non-point source pollution of farmland. The average utilization rate of urea in my country is only 30%, and the fertilizer effect period is only 35 days. The annual direct economic loss caused by the loss of farmland nitrogen (mainly urea conversion products) is more...

Claims

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Application Information

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IPC IPC(8): C05G3/00
Inventor 张彬
Owner 武威金仓生物科技有限公司
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