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Nitryl fertilizer containing activated mineral resource humic acid and preparation method thereof

A humic acid and fertilizer technology, applied in organic fertilizers, inorganic fertilizers, calcareous fertilizers, etc., can solve problems such as intractability, and achieve the effects of increasing content, reducing viscosity and increasing solubility

Inactive Publication Date: 2019-03-19
郑利
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, this method can not discharge phosphogypsum, solves the problem of difficult disposal of phosphogypsum (calcium sulfate) waste residue that is ubiquitous in the production of phosphate and compound fertilizers, and even does not separate acid-insoluble matter, so that there is no solid waste discharge at all

Method used

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  • Nitryl fertilizer containing activated mineral resource humic acid and preparation method thereof
  • Nitryl fertilizer containing activated mineral resource humic acid and preparation method thereof
  • Nitryl fertilizer containing activated mineral resource humic acid and preparation method thereof

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preparation example Construction

[0039] A preparation method of a nitro fertilizer containing activated mineral source humic acid, comprising the following steps:

[0040] Mix nitric acid with inorganic minerals, dissolve inorganic minerals, and obtain an acidolysis solution; add mineral humic acid to the acid solution, and add excess nitric acid for activation, add alkali to the activated acid solution to neutralize the remaining nitric acid , concentrated by evaporation, granulated or powdered, and dried to obtain the nitro fertilizer.

[0041] The preparation method of the nitro fertilizer containing activated mineral humic acid provided by the present invention is to prepare compound fertilizer with mineral humic acid and inorganic minerals, and add nitric acid for activation, after activation, add nitro groups to the humic acid molecules , Convert mineral humic acid from large molecules to small molecules, reduce the content of black humic acid, increase the content of brown humic acid and fulvic acid, i...

Embodiment 1

[0068] Adopt the method provided by the application to prepare nitrophosphate fertilizer, such as figure 1 As shown, it specifically includes the following steps:

[0069] Mix nitric acid with phosphate rock, dissolve the phosphate rock, separate the insoluble matter to obtain an acidolysis solution, add sulfuric acid in an amount equal to the molar amount of calcium in the phosphate rock to precipitate calcium in the form of calcium sulfate, and filter to remove calcium sulfate; Add peat humic acid to the solution, and add 30% nitric acid of peat humic acid mass (in addition to the remaining nitric acid in the acid solution, the content of nitric acid is excessive relative to the humic acid from the mineral source) for activation, and pass ammonia gas into the activated acid solution Neutralize the remaining nitric acid, evaporate and concentrate, granulate and dry to obtain the nitrophosphate fertilizer.

Embodiment 2

[0072] Adopt the method provided by the application to prepare nitrophosphate fertilizer, such as image 3 As shown, it specifically includes the following steps:

[0073] Mix nitric acid with phosphate rock, dissolve the phosphate rock, separate the insoluble matter, and obtain acidolysis solution, cool the acid solution solution to below -5°C, after calcium nitrate tetrahydrate crystallizes, remove calcium nitrate by filtration; in the acid solution solution Add lignite humic acid, and add nitric acid 50% times the mass of lignite humic acid (in addition to the remaining nitric acid in the acid solution, the content of nitric acid is excessive relative to the humic acid from the mineral source) to activate, and pass through the activated acid solution to neutralize The remaining nitric acid is concentrated by evaporation, granulated and dried to obtain the nitrophosphate fertilizer.

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Abstract

The invention provides a nitryl fertilizer containing activated mineral resource humic acid and a preparation method thereof. The method comprises the following steps: mixing nitric acid with an inorganic mineral, dissolving the inorganic mineral, and separating insoluble substances to obtain an acidolysis liquid; adding mineral resource humic acid to the acidolysis liquid, adding excessive nitricacid for activation, adding alkali into the activated acidolysis liquid to neutralize residual nitric acid, evaporating and concentrating, pelletizing or milling powder, and drying to obtain the nitryl fertilizer. A composite fertilizer is prepared by adopting the mineral resource humic acid and the inorganic mineral, nitric acid is added for activation, and after activation, nitryl groups are added to humic acid molecules, to convert the mineral resource humic acid from large molecules to small molecules, and therefore, the content of humus is reduced, the contents of ulmic acid and fulvic acid are increased, the solubleness is improved, and the fertilizer efficiency is improved; the preparation method is improved on the basis of an original process, without increasing a too complex production line, and thus has the advantages of being convenient, simple, and easy for production.

Description

technical field [0001] The invention relates to the technical field of fertilizer preparation, in particular to a nitro fertilizer containing activated mineral source humic acid and a preparation method thereof. Background technique [0002] Humic acid fertilizer is a kind of organic fertilizer. Natural humic acid is formed by the decomposition of plant residues. It widely exists in dry soil, river mud and shallow buried weathered coal, peat and lignite. Contains carbon, hydrogen, oxygen, nitrogen and other elements, and has a certain fertilizer effect, but most of them are insoluble in dry water. If they are combined with potassium, sodium, ammonium and other substances and ammoniated in the sun, they are easily absorbed by plants as nutrients. [0003] In the existing preparation method of the nitro fertilizer (comprising elemental fertilizer and compound fertilizer) that contains activated ore source humic acid, usually earlier adopt nitric acid and ore or ore powder re...

Claims

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Application Information

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IPC IPC(8): C05G3/04C05G3/80
CPCC05B17/00C05D3/02C05G3/80C05F11/02C05D5/00
Inventor 郑利张云
Owner 郑利
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