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Humic acid composite fertilizer and preparation method thereof

A technology of humic acid and compound fertilizer, applied in urea compound fertilizer, ammonium orthophosphate fertilizer, alkaline orthophosphate fertilizer, etc., can solve the problems of easy nutrient loss, soil compaction, short fertilizer efficiency, etc., and improve soil permeability properties, increase soil fertility, and improve the effect of fertilizer utilization

Inactive Publication Date: 2017-05-10
SHENZHEN BATIAN ECOTYPIC ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of short fertilizer efficiency, easy loss of nutrients, and soil compaction in the prior art, and firstly provides a humic acid compound fertilizer with both quick-acting and long-acting effects

Method used

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  • Humic acid composite fertilizer and preparation method thereof

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preparation example Construction

[0045] See figure 1 The present invention also provides a preparation method of the above-mentioned humic acid compound fertilizer, including the following steps:

[0046] S1 prepares raw materials of humic acid, phosphoric acid, urea, magnesium oxide, monoammonium phosphate, potassium chloride and trace elements. Since urea phosphate is synthesized from urea and phosphoric acid, ammonium polyphosphate is made from said urea and urea. Synthesis, the final preparation also contains urea raw materials, so urea needs to be prepared according to urea phosphate synthesis, ammonium polyphosphate synthesis and humic acid compound fertilizer preparation respectively according to the first urea, the second urea, and the third urea;

[0047] S2 prepares urea phosphate:

[0048] 75%-85% phosphoric acid is sprayed into the first reactor 1 which has been filled with the first portion of urea. The first reactor 1 is equipped with a vacuum device and a stirring device, and the molar ratio of the ...

Embodiment 1

[0057] 1. Preparation of Urea Phosphate:

[0058] According to the molar ratio of urea to phosphoric acid of 1:1, 85% phosphoric acid was added to the first reactor pre-filled with the first part of urea and mixed and stirred, maintaining normal pressure, the speed of the stirring device was 300r / min, and the reaction temperature was 85°C. The reaction time is 30min. After the reaction is completed, the urea phosphate solution is stored in the urea phosphate storage tank.

[0059] 2. Preparation of ammonium polyphosphate:

[0060] According to the molar ratio of urea and urea phosphate of 1:2, the second portion of urea and urea phosphate solution was put into the second reaction kettle, and reacted for 90 minutes at a temperature of 220° C., and the prepared ammonium polyphosphate had a polymerization degree of 8. After the reaction was completed, the ammonium polyphosphate was put into the ammonium polyphosphate cooling tower and cooled to 110°C.

[0061] 3. Preparation of compoun...

Embodiment 2

[0065] 1. Preparation of Urea Phosphate:

[0066] According to the molar ratio of urea to phosphoric acid of 1:0.95, 75% phosphoric acid was added to the first reactor containing the first portion of urea, the vacuum in the reactor was controlled to 0.5Mpa, the speed of the stirring device was 250r / min, and the reaction temperature 90°C, reaction time 35min.

[0067] 2. Preparation of ammonium polyphosphate:

[0068] According to the molar ratio of urea to urea phosphate of 1:2.2, the second portion of urea and urea phosphate solution was mixed in the second reaction kettle, and reacted at a temperature of 260° C. for 100 min. The prepared ammonium polyphosphate had a polymerization degree of 8. After the reaction was completed, the ammonium polyphosphate was put into the ammonium polyphosphate cooling tower and cooled to 100°C.

[0069] 3. Preparation of compound fertilizer:

[0070] Melt the third portion of urea 25kg, add 30kg potassium chloride, transfer to the mixing tank, contro...

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Abstract

The invention relates to a humic acid composite fertilizer, which is prepared from 20 to 30 parts of humic acid, 10 to 20 parts of urea phosphate, 15 to 25 parts of ammonium polyphosphate, 5 to 15 parts of magnesium ammonium phosphate, 0.1 to 3 parts of trace elements, 15 to 25 parts of urea, 3 to 10 parts of monoammonium phosphate and 18 to 30 parts of potassium chloride. A preparation method of the humic acid composite fertilizer comprises the following steps of synthesizing the phosphoric acid and the urea for preparing the urea phosphate; then, synthesizing the prepared urea phosphate and the urea to prepare the ammonium polyphosphate; then, fusing the urea according to the weight parts of the ingredients; after the addition of the potassium chloride, adding the ammonium polyphosphate, urea phosphate and trace elements into a mixed groove to stir; then, adding the monoammonium phosphate and magnesium oxide; performing stirring; finally, adding the humic acid; uniformly mixing the materials for granulation. The prepared humic acid composite fertilizer has the advantages that the nutrients can be gradually released according to the soil condition; the requirements of the crops at different growth stages can be met; the soil structure can be effectively improved; the effects of nitrogen control, phosphorus stabilization and potassium retaining can be achievedt; the crop resistance can be improved; the crop quality is improved; the yield is increased.

Description

Technical field [0001] The invention belongs to the technical field of fertilizers, and in particular relates to a humic acid compound fertilizer with both quick-acting and long-acting effects and a preparation method. Background technique [0002] At present, some lands in our country have long-term single application of inorganic chemical fertilizers, humus cannot be supplemented, and soil aggregate structure is destroyed, resulting in soil compaction, acidification or salinization. The utilization rate of domestic fertilizers is originally low, and the above problems will It directly leads to a further reduction in fertilizer utilization, especially the quick-acting phosphate fertilizer is easily fixed when applied to the soil. Generally, most of it is converted into ineffective phosphorus within seven days, and some water-soluble phosphorus is lost with water. Urea applied to the soil will be quickly decomposed under the action of urease and nitrase, and nitrogen volatilizes,...

Claims

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Application Information

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IPC IPC(8): C05G3/04C05G3/08C05G3/80C05G3/90
CPCC05B7/00C05G3/80C05G3/90C05B15/00C05C9/00C05D1/02C05D9/02C05F11/02
Inventor 石朋飞穆光远陈彬阚学飞张敏黄春艳
Owner SHENZHEN BATIAN ECOTYPIC ENG
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