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A kind of urea phosphate mother liquor slow-release suspension liquid fertilizer and preparation method thereof

A technology of urea phosphate mother and suspended liquid, applied in liquid fertilizers, ammonium orthophosphate fertilizers, alkaline orthophosphate fertilizers, etc., can solve the problems of inconvenient transportation, difficult customer acceptance, low product profit, etc. Economic benefits and long-term stable effects

Active Publication Date: 2022-05-13
GUIZHOU CHANHEN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, it is directly sold as agricultural grade fertilizer, but it is difficult to be accepted by customers due to inconvenient transportation, and the products used for agricultural grade fertilizer have low profit
Therefore, for many urea phosphate manufacturers, the urea phosphate mother liquor is a waste material, and a certain cost is required for disposal
However, the suspended liquid fertilizer is a supersaturated liquid and is in an unstable state. It is greatly affected by external force, temperature, pH, etc. The solution is easy to precipitate crystals, and the crystals will continue to grow, eventually leading to solid-liquid separation of the suspended liquid fertilizer.
Many suspended liquid fertilizers currently on the market will have unsettled deposition and stratification problems, and deposition is more likely to occur after long-term storage

Method used

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  • A kind of urea phosphate mother liquor slow-release suspension liquid fertilizer and preparation method thereof
  • A kind of urea phosphate mother liquor slow-release suspension liquid fertilizer and preparation method thereof

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preparation example Construction

[0046] The present invention also provides a kind of preparation method of urea phosphate mother liquor sustained-release suspension liquid fertilizer, comprising the following steps:

[0047] A) adding 90 to 100 parts of pH regulator into 1000 parts of urea phosphate mother liquor to obtain a mixed mother liquor with a pH value of 3.0 to 7.0;

[0048] B) adding 200 to 500 parts by weight of a compound containing a large number of elements into the mixed mother liquor to obtain a suspension fertilizer mother liquor;

[0049] C) adding 15 to 30 parts by weight of suspending agent to the suspension fertilizer mother liquor, dispersing and emulsifying, and obtaining the slow-release suspension liquid fertilizer of urea phosphate mother liquor;

[0050] The suspending agent is one or more of xanthan gum, polyacrylamide and clay mineral; the clay mineral is one or more of montmorillonite, sepiolite, attapulgite and bentonite.

[0051] In the present invention, the type, amount and...

Embodiment 1

[0062] S1: Take 1000 parts of urea phosphate mother liquor at room temperature, slowly add 100 parts of ammonium bicarbonate to the urea phosphate mother liquor, stir with a mechanical stirrer, the stirring speed is 600 rpm, and the stirring time is 50 minutes to obtain a mixed mother liquor;

[0063] S2: Add 100 parts of urea, 80 parts of potassium pyrophosphate, and 100 parts of ammonium tripolyphosphate to the mixed mother liquor, and stir at the same stirring speed for 50 minutes to obtain the suspension fertilizer mother liquor;

[0064] S3: Add 10 parts of xanthan gum, 6 parts of polyacrylamide, and 2 parts of sodium bentonite to the mother liquor of the suspended fertilizer, and emulsify with an emulsifying machine at a speed of 8000 rpm for 3 minutes to obtain a suspended liquid fertilizer .

Embodiment 2

[0066] S1: Take 1000 parts of urea phosphate mother liquor at room temperature, slowly add 100 parts of ammonium bicarbonate to the urea phosphate mother liquor, stir with a mechanical stirrer, the stirring speed is 600 rpm, and the stirring time is 50 minutes to obtain a mixed mother liquor;

[0067] S2: Add 200 parts of UAN, 150 parts of ammonium polyphosphate, 100 parts of potassium pyrophosphate, and 20 parts of potassium chloride to the mixed mother liquor, and stir for 50 minutes at the same stirring speed to obtain the suspension fertilizer mother liquor;

[0068] S3: Add 15 parts of potassium fulvic acid, 10 parts of xanthan gum, 4 parts of polyacrylamide, 2 parts of sodium bentonite, and 2 parts of attapulgite to the mother liquor of the suspension fertilizer, and emulsify with an emulsifier at a speed of 8000 rev / min, emulsification time is 3 minutes, and the suspension liquid fertilizer is obtained.

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Abstract

The object of the present invention is to provide a slow-release suspension liquid fertilizer of urea phosphate mother liquor, which is prepared from the following raw materials in parts by weight: urea phosphate mother liquor: 1000 parts; pH regulator: 90-100 parts; compound containing a large number of elements: 200 ~500 parts; Suspending agent: 15~30 parts; Said suspending agent is one or more in xanthan gum, polyacrylamide and clay mineral; Said clay mineral is montmorillonite, sepiolite, attapulgite One or more of soil and bentonite. The method provided by the invention can solve the problem of precipitation of urea phosphate mother liquor with high content of inorganic metal ions, and no waste water or waste residue will be generated during the preparation process, and the gas produced is carbon dioxide, which will not pollute the environment. The prepared liquid fertilizer has a slow-release effect. The invention also provides a preparation method of the urea phosphate mother liquor slow-release suspension liquid fertilizer.

Description

technical field [0001] The invention belongs to the technical field of liquid fertilizer production, and in particular relates to a urea phosphate mother liquor slow-release suspension liquid fertilizer and a preparation method thereof. Background technique [0002] Liquid fertilizer has become the first choice fertilizer for irrigation equipment due to its advantages of fast dissolution and uniformity. Because of its ready-to-use, no need to stir and dissolve, it is very suitable for automatic fertilization. In countries where irrigation technology and automatic fertilization are popular, liquid fertilizers are widely used. In the United States, liquid fertilizers account for more than 38% of all fertilizers. Almost all fields in Israel use liquid fertilizers. Australia, France, Germany, Spain, Romania, etc. are all countries that use liquid fertilizers in large quantities. [0003] my country is a large agricultural country and is the world's largest producer and consumer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C05G3/40C05G3/80C05G3/90C05G5/27
CPCC05B7/00C05G3/00
Inventor 王成文袁海斌雷波陈仕林马永强简路明
Owner GUIZHOU CHANHEN CHEM CO LTD
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