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Humic acid urea and preparing method thereof

A humic acid urea, humic acid technology, applied in fertilizer mixture, fertilization device, application and other directions, can solve the problems of difficult mass production, popularization and application, application effect is not very obvious, product appearance is not beautiful, etc. Conversion process, cost environment friendly, low cost effect

Active Publication Date: 2012-07-18
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The common feature of the above two kinds of humic acid urea products is that they use humic acid to wrap urea particles. They both have the disadvantages of unsightly appearance and the humic acid on the outer layer is easy to fall off, which is very inconvenient to use.
Secondly, because the humic acid used in the above two products is low-grade coal, the content of humic acid is low, the water solubility is poor, the absorption rate of crops is low, and the application effect is not very obvious
At the same time, the production cost of the above-mentioned products is high, and the production speed is slow, so it is difficult to mass-produce, popularize and apply

Method used

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  • Humic acid urea and preparing method thereof

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Effect test

Embodiment 1

[0052] Embodiment 1: Preparation of humic acid synergist solution A

[0053] Crush the weathered coal to 80 mesh, add 0.3% by weight sodium hydroxide solution with a concentration 10 times its weight, heat and continue to boil for 20 minutes, then carry out centrifugation to obtain a supernatant, and concentrate the supernatant to the solid Humic acid synergist solution A is obtained with a content of 8%.

Embodiment 2

[0054] Embodiment 2: Preparation of humic acid synergist solution A

[0055] Pulverize lignite to 100 mesh, add 0.5% by weight potassium hydroxide solution with a concentration 12 times its weight, heat and continue to boil for 25 minutes, then carry out centrifugation to obtain a supernatant, and concentrate the supernatant to the solid Content is 6%, namely obtains humic acid synergist solution A.

Embodiment 3

[0056] Embodiment 3: Preparation of humic acid synergist solution B

[0057] Mix the sulfuric acid solution with a concentration of 0.5% by weight and sodium humate in a weight ratio of 9:1, stir thoroughly for 15 minutes, and then centrifuge to obtain a supernatant, which is concentrated to a solid content of 10% by weight , to obtain humic acid synergist solution B;

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Abstract

The invention relates to humic acid urea and a preparing method thereof. The preparing method includes: firstly preparing humic acid synergistic liquid, then adding the humic acid synergistic liquid into urea melt liquid during urea producing, and finally performing high tower cooling granulation on mixture of the humic acid synergistic liquid and the urea melt liquid to obtain the humic acid urea. The humic acid urea has the advantages of being high in nitrogen content and productivity, low in cost, good in effect, suitable for field crops, easy to popularize and use and the like. In production practice, the humic acid urea reduces ammonia volatilization loss by restraining soil urease activity, has the characteristics of being excellent in slow release performance, high in in-season nutrient use ratio, environment-friendly and the like, is simple in manufacture technology, wide in raw material sources, easy to operate, low in cost, high in productivity and environment-friendly, and has wide application prospect in specific production practice.

Description

【Technical field】 [0001] The invention relates to a fertilizer, in particular to a humic acid urea and a preparation method thereof. 【Background technique】 [0002] Urea is the nitrogen fertilizer with the highest nitrogen content, the largest agricultural demand, and the widest application range. Urea has high activity and is transformed quickly in the soil. It can cause gaseous loss through ammonia volatilization or denitrification. After being converted into nitrate nitrogen, it is not easy to be adsorbed by soil colloids, and it is easy to leaching in the soil. The absorption and utilization of urea nitrogen by crops The utilization rate is very low, and the utilization rate is only about 35%, which not only causes economic losses, but also causes serious environmental pollution due to nitrate, nitrite, and nitrogen oxides formed by the decomposition and conversion of urea. [0003] In order to solve this problem, agricultural chemists from all over the world have condu...

Claims

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Application Information

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IPC IPC(8): C05G3/08C05G3/90
Inventor 赵秉强袁亮李燕婷林治安温延臣杨相东李娟戚剑王薇
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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