A modified humic acid chelated water soluble fertilizer and a preparing method thereof

A water-soluble fertilizer and humic acid technology, applied in the direction of alkaline orthophosphate fertilizer, nitrate fertilizer, urea compound fertilizer, etc., can solve the problem of humic acid's unsatisfactory anti-flocculation performance and activity, unfavorable crop growth, and narrow supply of raw materials etc. to achieve the effects of slow absorption and utilization, simple and controllable preparation methods, and avoiding rapid loss

Inactive Publication Date: 2017-04-19
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 implementation of this technical solution requires high-priced potassium hydroxide, which has a certain destructive effect on the environment; at the same time, its components lack various trace elements necessary for plants, which is unfavorable to the growth of crops
[0005] Chinese invention patent application number 201310357167.9 discloses a water-soluble fertilizer containing high concentration of humic acid. , hydroxymethyl cellulose, and water are the formula, which also has the defect of insufficient nutritional elements, especially the lack of trace elements necessary for various plants, so it is not conducive to the growth of crops
[0006] China Invention Patent Application No. 201510003070.7 discloses a high-concentration humic acid water-soluble fertilizer. In order to solve the technical problem that the anti-flocculation performance and activity of humic acid in most humic acid water-soluble fertilizers are not ideal at present, it adopts high activity Potassium humate and potassium tripolyphosphate are the main raw materials, a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Dissolve the lignite rich in humic acid in a 5% phosphoric acid solution after grinding and sieving, remove the fulvic acid in the upper liquid that is soluble in acidic conditions, and add ammonia water (NH 3 ·H 2 O) dissolve humic acid, adjust the system to make the pH 8, and form a mixed solution of ammonium humate;

[0031](2) Transfer the ammonium humate mixed solution to a sealable reaction vessel, add the polymerizable monomer compound carboxylic acid solution, seal the reactor, use the acid solution to adjust the pH of the reaction system to between 7 and 8, and stir and mix at a constant speed Solution, slowly heat the solution to 72ºC~85ºC, heat-preserve and mature for 3 hours to make the polymerizable monomer compound coordinate with the ammonium humate mixture to form a particulate structure and obtain a dispersion;

[0032] (3) Adjust the pH of the dispersion liquid obtained in step (2) to 6-7, and add industrial grade potassium dihydrogen phosphate, i...

Embodiment 2

[0035] (1) After grinding and sieving peat rich in humic acid, dissolve it in a nitric acid solution with a mass fraction of 10%, remove the fulvic acid in the upper liquid that is soluble in acidic conditions, and then add ammonia water (NH 3 ·H 2 O) dissolve humic acid, adjust the system to make the pH>8.4, and form a mixed solution of ammonium humate;

[0036] (2) Transfer the ammonium humate mixed solution to a sealable reaction vessel, add the polymerizable monomer compound carboxylate solution, seal the reactor, use the acid solution to adjust the pH of the reaction system to between 7 and 8, and stir at a constant speed Mix the solution, slowly heat the solution to 72ºC~85ºC, heat and cure for 6 hours to coordinate polymerize the polymerizable monomer compound with the ammonium humate mixture to form a particulate structure, and obtain a dispersion liquid, wherein the polymerizable monomer compound It is at least one kind of material among carboxylic acid, carboxylic a...

Embodiment 3

[0039] (1) Dissolve the weathered coal rich in humic acid in acetic acid solution with a mass fraction of 10% after grinding and sieving, remove the fulvic acid in the upper liquid that is soluble in acidic conditions, and add ammonia water (NH 3 ·H 2 O) dissolve humic acid, adjust the system to make the pH>7.8, and form a mixed solution of ammonium humate;

[0040] (2) Transfer the ammonium humate mixed solution to a sealable reaction vessel, add the polymerizable monomer compound carboxylic acid anhydride solution, seal the reactor, use the acid solution to adjust the pH of the reaction system to between 7 and 8, and stir and mix at a constant speed Solution, the solution is slowly heated to 72ºC~85ºC, heat-preserved and matured for 9 hours so that the polymerizable monomer compound can be coordinately polymerized with the ammonium humate mixture to form a particulate structure, and a dispersion liquid is obtained, wherein the polymerizable monomer compound is At least one ...

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Abstract

The invention relates to a modified humic acid chelated water soluble fertilizer. Humic acid can be polymerized and modified by utilizing a polymerizable monomer compound to allow the humic acid to be dispersed in water in a microsphere manner, thus overcoming the water solubility problem of the humic acid on the one hand and improving chelating performance on the other hand. After the humic acid is chelated with ions in conventional nitrogen phosphorus potassium fertilizers and trace element fertilizers, the chelation products can be well dispersed in water, thus promoting absorption and utilization of elements by crops. Through chelation with trace mineral element cations, formation of noneffective precipitates from the ions and PO<4><3-> and SO<4><2-> can be avoided. A preparing method of the chelated water soluble fertilizer is also provided. The method includes steps of subjecting the humic acid to polymerization modification with the polymerizable monomer compound to obtain a humic acid microsphere suspension, and then subjecting the suspension, nitrogen phosphorus potassium fertilizers and trace elements such as calcium, zinc, boron and magnesium to mechanical grinding and dispersing under waterless conditions to obtain the modified humic acid chelated water soluble fertilizer.

Description

technical field [0001] The invention belongs to the technical field of agricultural fertilizers, in particular to a water-soluble fertilizer containing humic acid and a preparation method thereof, in particular to a water-soluble fertilizer containing polymer-modified humic acid and a preparation method thereof. Background technique [0002] Humic acid, also known as humic acid (HA for short), is the remains of animals and plants, mainly the remains of plants, a type of organic substance caused and accumulated by a series of processes of microbial decomposition and transformation, as well as geochemistry. Humic acid is a mixture of a group of amorphous acidic substances with aromatic structures and similar properties, including black humic acid, fulvic acid and brown humic acid. Humic acid can improve the soil, improve the physical structure of the soil, neutralize the acidity and alkalinity of the soil, and adjust the pH value; it can adsorb, exchange, and activate many min...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G3/80
CPCC05B7/00C05C3/00C05G3/00C05G3/80C05C5/02C05D9/00C05D9/02C05F11/02C05C9/00C05D3/00C05D5/00
Inventor 陈庆曾军堂陈兵王镭迪
Owner CHENDU NEW KELI CHEM SCI CO LTD
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