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High-concentration suspended liquid fertilizer and preparation method thereof

A suspended liquid, high concentration technology, applied in liquid fertilizers, nitrogen fertilizers, potash fertilizers, etc., can solve the problems of easy sedimentation, solid-liquid separation of suspended fertilizers, and insignificant thickening effect, so as to solve the problems of low nitrogen utilization rate, The production process is short and the wall sticking phenomenon is not obvious.

Inactive Publication Date: 2017-05-31
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is that it is prone to subsidence
However, a stable suspension can only be produced by using a large amount, and the cost problem has been entangled in the development of suspension liquid fertilizer.
Clay mineral is a low-cost thickener, suitable for a large amount of use in suspended liquid fertilizers, but the existing problems are: on the one hand, clay minerals have low viscosity, and the thickening effect is not obvious in liquid fertilizers. The product is easy to settle in a short time
However, the suspended fertilizer is a supersaturated liquid and is in an unstable state. Under the influence of external force, temperature, pH, etc., the dissolved fertilizer will precipitate crystals, and the crystals will continue to grow, eventually leading to the formation of solid-liquid separation in the suspended fertilizer.
As a result, large particles sink to the bottom of the water during the integrated fertilization process, causing uneven dispersion and even blocking the pipeline
This defect is especially obvious in high concentration suspension fertilizer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A high-concentration suspended liquid fertilizer prepared from the following raw materials:

[0043] (1) 35 parts of urea, 30 parts of ammonium dihydrogen phosphate, 10 parts of ammonium nitrate, 8 parts of potassium sulfate, 3 parts of potassium tripolyphosphate, 1 part of magnesium oxide, 1 part of ferrous sulfate, 2 parts of copper sulfate, 0.5 parts of borax Parts, 0.1 part of xanthan gum, 20 parts of water, control the grinding temperature in a ball mill to be less than 50°C, grind the undissolved particles to micron level, and form a suspension under the action of the suspension aid;

[0044] (2) Disperse 10 parts of crystal growth inhibitor and 10 parts of water in a high-speed disperser at a stirring speed of 3000 rpm for 20 minutes to obtain a colloidal liquid;

[0045] (3) Mix the suspension obtained in step (1) with the colloidal liquid obtained in step (2) uniformly to obtain a high-concentration suspended liquid fertilizer.

[0046] Wherein, the crystal growth inhi...

Embodiment 2

[0049] A high-concentration suspended liquid fertilizer prepared from the following raw materials:

[0050] (1) 40 parts urea, 30 parts ammonium dihydrogen phosphate, 15 parts ammonium nitrate, 8 parts potassium sulfate, 5 parts potassium tripolyphosphate, 1 part magnesium oxide, 1 part ferrous sulfate, 1 part copper sulfate, 0.5 parts borax Parts, 0.3 parts of pregelatinized starch, 20 parts of water, in a sand mill, control the grinding temperature to be less than 50°C, grind the undissolved particles to micron level, and form a suspension under the action of the suspension aid;

[0051] (2) Disperse 8 parts of crystal growth inhibitor and 5 parts of water in a high-speed disperser at a stirring speed of 5000 rpm for 30 minutes to obtain a colloidal liquid;

[0052] (3) Mix the suspension obtained in step (1) with the colloidal liquid obtained in step (2) uniformly to obtain a high-concentration suspended liquid fertilizer.

[0053] Wherein, the crystal growth inhibitor is a nanopor...

Embodiment 3

[0056] A high-concentration suspended liquid fertilizer prepared from the following raw materials:

[0057] (1) 40 parts urea, 20 parts ammonium dihydrogen phosphate, 10 parts ammonium nitrate, 5 parts potassium sulfate, 5 parts potassium tripolyphosphate, 1 part magnesium oxide, 1 part ferrous sulfate, 1 part copper sulfate, 0.5 parts borax Parts, 0.1 part of carboxymethyl cellulose, 15 parts of water, control the grinding temperature to be less than 50°C in the tubular homogenizer, grind the undissolved particles to micron level, and form a suspension under the action of the suspension aid;

[0058] (2) Disperse 5 parts of crystal growth inhibitor and 5 parts of water in a high-speed disperser at a stirring speed of 3000 rpm for 15 minutes to obtain a colloidal liquid;

[0059] (3) Mix the suspension obtained in step (1) with the colloidal liquid obtained in step (2) uniformly to obtain a high-concentration suspended liquid fertilizer.

[0060] Wherein, the crystal growth inhibitor ...

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Abstract

The invention relates to the field of liquid fertilizer, particularly relates to high-concentration suspended liquid fertilizer, and further relates to the solving of the defects that sedimentation is generated due to the fact that a crystal is separated out and grows to be a large particle in a high-concentration suspended liquid fertilizer storage process. The high-concentration suspended liquid fertilizer is characterized in that an insoluble substance in fertilizer is suspended through using a suspended auxiliary; specific nano-pore colloidal particles are added as a crystal growth inhibitor; the colloidal particles have excellent dispersity in the suspended fertilizer; nano pores of the colloidal particles have big enough surface areas and in-pore chelating agents to adsorb and collect crystalline gains; the aggregation of newly separated out crystalline grains and the growth of crystal grains in the storage process of liquid fertilizer are effectively limited through a space effect of the dispersion of the colloidal particles; thus, the high-concentration suspended liquid fertilizer is stably suspended for a long time. The crystal growth inhibitor has fixation effects on amidonitrogen, ammonium nitrogen and nitric nitrogen; after the high-concentration suspended liquid fertilizer is used for water-fertilizer integrated fertilizer application, the loss and the volatilization of nitrogen fertilizer are reduced; thus, the defect that the utilization rate of a nitrogen element is low for a long time in water-fertilizer integration is effectively solved.

Description

Technical field [0001] The invention relates to the field of liquid fertilizers, in particular to a high-concentration suspended liquid fertilizer, and further relates to solving the defect that crystals precipitate and grow into large particles during storage of high-concentration suspended liquid fertilizers, resulting in sedimentation. Background technique [0002] With the rapid development of water and fertilizer integration technology, the development trend of instant, compound, liquefied, and concentrated fertilizers is becoming more and more obvious. In particular, the proportion of liquid compound fertilizers is increasing year by year. Liquid fertilizer is a kind of fluid fertilizer. Because of its uniform composition, high nutrient activity, flexible formula, simple production, convenient use, and wide raw material sources, it is more and more accepted by people. At present, liquid fertilizers include clear liquid type and suspension type. [0003] In order to meet the...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05B7/00C05G3/00C05G5/20C05C1/00C05C9/00C05D1/02C05D5/00C05D9/00C05D9/02
Inventor 陈庆曾军堂
Owner CHENDU NEW KELI CHEM SCI CO LTD
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