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A kind of humic acid coated urea and its production method

A technology for coating urea and humic acid, which is used in agricultural gas emission reduction, fertilizer mixtures, fertilization devices, etc. Large-scale production and other issues, to achieve the effects of abundant reserves, improved urea utilization, and easy promotion

Inactive Publication Date: 2016-05-11
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that it needs to be coated multiple times and dried at high temperature, consumes a lot of energy, and the production efficiency is low, so it is difficult to produce on a large scale
This method can only be carried out in the urea production plant, and subsequent processing is not possible, and the slow release performance is limited
[0012] Due to the limitation of slow-release performance and manufacturing process, the scale production and sales of widely recognized humic acid-coated urea products have not been seen in the market so far.

Method used

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  • A kind of humic acid coated urea and its production method
  • A kind of humic acid coated urea and its production method
  • A kind of humic acid coated urea and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Urea specifications: particle size 2.00 ~ 4.75 mm,

[0076] Adhesive composition:

[0077] Styrene-acrylic waterproof emulsion (45%): 75 parts by weight, polyvinyl formal resin (8%): ​​10 parts by weight, yellow dextrin: 5 parts by weight, water: 10 parts by weight.

[0078] Package powder ratio:

[0079] Humic acid (180-300 mesh): 45 parts by weight, sodium humate (120-200 mesh): 15 parts by weight, hemihydrate gypsum (180-300 mesh): 20 parts by weight, calcined diatomite (180-325 mesh ): 8 parts by weight, sodium-based pentonite (160-200 mesh): 4 parts by weight, sodium polyacrylate (160-200 mesh): 6 parts by weight, dicyandiamide (160-200 mesh): 2.0 parts by weight.

[0080] Urea consumption: 90KG

[0081] Adhesive dosage: 1.5KG

[0082] Package powder consumption: 8.5KG

[0083] Follow the steps below:

[0084] (1) Put the binder raw material into the blending tank, mix it with water, and make the binder for subsequent use;

[0085] (2) Mixing humic acid and ...

Embodiment 2

[0091] The urea specification, binder composition, package powder proportioning are the same as embodiment 1

[0092] Urea consumption: 86KG

[0093] Adhesive dosage: 2.0-KG

[0094] Package powder consumption: 12.0KG

[0095] According to embodiment 1 step operation

[0096] After testing, the relative loss control rate of the obtained humic acid-coated urea is 76%, the relative water retention rate is 77%, and the slow dissolution rate is 4.3 times.

Embodiment 3

[0098] The urea specification, binder composition, package powder proportioning are the same as embodiment 1

[0099] Urea consumption: 82KG

[0100] Adhesive dosage: 2.5KG

[0101] Package powder consumption: 15.5KG

[0102] According to embodiment 1 step operation

[0103] After testing, the relative loss control rate of the obtained humic acid-coated urea is 86%, the relative water retention rate is 82%, and the slow dissolution rate is 5.1 times.

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Abstract

The invention provides multifunctional humic acid type coated urea and a production method thereof. The production method comprises the following step: by taking urea as an inner core, humic acid and derivatives thereof as a main coating material and carrier, and a water-based emulsion as viscose, adding corresponding functional components and various auxiliary materials, thus obtaining the multifunctional humic acid type coated urea. The multifunctional humic acid type coated urea has the functions of moisture retention, fertilizer maintenance, slow dissolution, slow release and the like, and the utilization ratio of the urea is improved more effectively; and since the coated urea is produced under the condition of normal temperature and pressure, the process is easy to operate and control and easy to realize continuous large-scale production.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, and relates to a multi-effect humic acid-type coated urea capable of effectively improving the utilization rate of urea and a production method thereof. Background technique [0002] As an important nitrogen fertilizer and nitrogen source, urea plays an irreplaceable role in agriculture and fertilizer production. At present, my country consumes more than 50 million tons of urea every year. However, because urea is easy to decompose, volatilize and leaching after application, its actual utilization rate is very low, usually only about 35%, which not only wastes resources, but also causes environmental pollution. [0003] How to improve the utilization rate of urea has been a problem that people have been concerned about and devoted to solving for a long time. People try to improve the utilization rate of urea through physical, chemical and biochemical methods. For example, urea and formaldehy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/04C05G3/08C05G3/80C05G3/90
CPCY02P60/21
Inventor 曾宪文
Owner YANSHAN UNIV
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