Humic acid urea, preparation method thereof, and composition for preparing humic acid urea

A technology of humic acid urea and composition, applied in the direction of urea compound fertilizer, fertilizer mixture, application, etc., can solve the problems of soil toxicity, high cost, pollution of agricultural ecological environment, etc., achieve low cost, increase utilization rate, and avoid pollution Effect

Inactive Publication Date: 2018-08-14
LOMON LAND AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above three methods can improve the utilization rate of nitrogen to a certain extent, but the cost

Method used

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preparation example Construction

[0044] The embodiment of the present invention also provides a preparation method of humic acid urea, which includes: stirring and mixing the first urea and the composite binder for 2-6 minutes. Add humic acid powder at 20-45°C and stir for 5-10 minutes.

[0045] Stirring and mixing the first urea and the composite binder can make the composite binder fully coat the surface of the urea particles of the first urea, so that the composite binder can form a complete protection on the surface of the urea particles of the first urea layer, which can not only effectively protect the first urea, prevent the nitrogen of the first urea from losing too much during storage, but also help the subsequent humic acid powder to be fully and completely bonded to the first urea A dense layer of humic acid powder is formed on the outside. In order to ensure that the subsequent branch calculation powder can effectively control the release of nitrogen from the first urea.

[0046] It should be no...

Embodiment 1

[0057] This embodiment provides a composition for preparing humic acid urea, which includes, in parts by weight: 100 g of the first urea, 25 g of lignite powder, and 5 g of composite binder.

[0058] The raw materials of the above-mentioned composite binder include by weight: 2g of second urea, 25g of sodium humate, 5g of attapulgite, and 78g of water. Take 5g in the finally prepared composite binder.

[0059] Wherein, the lignite powder is -140 mesh to +170 mesh, the water content is 20%, and the mass percentage of free humic acid in the lignite powder in anhydrous state is 40%. The sodium humate has a humic acid mass percentage of 55% in an anhydrous state.

Embodiment 2

[0061] This embodiment provides a composition for preparing humic acid urea, which includes, in parts by weight: 100 g of the first urea, 25 g of weathered coal powder, and 10 g of a composite binder.

[0062] The raw materials of the above-mentioned composite binder include by weight: 2g of second urea, 25g of potassium humate, 5g of attapulgite, and 78g of water. Take 10g in the finally prepared composite binder.

[0063] Among them, the weathered coal powder is -120 mesh to +140 mesh, the water content is 15%, and the mass percentage of free humic acid in the weathered coal powder in anhydrous state is 45%. The mass percentage of humic acid in potassium humate is 55% in anhydrous state.

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Abstract

The invention discloses a humic acid urea, a preparation method thereof, and a composition for preparing the humic acid urea, and relates to the fields of fertilizers and chemical industry. The composition comprises, by weight, 60-150 parts of first urea, 17-35 parts of humic acid powder, and 3.5-12 parts of a composite binder. Raw materials of the composite binder include, by weight, 1.5-2.5 parts of second urea, 5-30 parts of humate, 3-15 parts of clay and 65-85 parts of water. The preparation method comprises the following steps: stirring and mixing the first urea and the composite binder for 2-6 min, adding the humic acid powder at 20-45 DEG C, and performing stirring for 5-10 min. The humic acid urea is prepared from the composition. The humic acid urea can effectively improve the utilization rate of nitrogen, and also can avoid environmental pollution. The preparation method has the advantages of simplicity, convenience, low cost, convenience in operation enforcement, and suitableness for large-scale industrial production. The composition has the advantages of easiness in obtaining, low cost, and great reduction of the requirements of raw materials.

Description

technical field [0001] The invention relates to the technical field of fertilizer chemical industry, in particular to a humic acid urea, a preparation method thereof and a composition for preparing humic acid urea. Background technique [0002] Urea is a high-concentration nitrogen fertilizer with a nitrogen content of about 46%. It is a neutral quick-acting fertilizer and can also be used to produce a variety of compound fertilizers. At present, the consumption of urea in our country accounts for about 50% of the total amount of nitrogen fertilizer, so the key to improving the utilization rate of nitrogen fertilizer is to improve the utilization rate of nitrogen in urea. Since the 1960s, researchers at home and abroad have been working on the synergy of urea. The methods can be roughly divided into three types: the first is the additive method, which is to add urease activity inhibitors or nitrifying bacteria activity inhibitors to the urea melt. agent; the second is the e...

Claims

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Application Information

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IPC IPC(8): C05G3/04C05G3/00C05G3/80
CPCC05C3/00C05C9/00C05G3/00C05G3/80C05G5/30C05D9/00C05F11/02
Inventor 晏萍汉何丰陈开明张洪江吴玉龙钟世林
Owner LOMON LAND AGRI
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