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Method for producing instant potassium sulfate

A technology of instant potassium sulfate and potassium sulfate, applied in the directions of potash fertilizers, inorganic fertilizers, fertilization devices, etc., can solve problems such as blocking fertilization drip holes, and achieve the effects of rapid dispersion and dissolution, overcoming agglomeration, and simple processing technology.

Active Publication Date: 2014-05-07
CHANGSHA DESIGN & RES INST OF CHEM IND MIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When crops are planted with potassium sulfate aqueous solution for large-scale drip irrigation, undissolved potassium sulfate particles and calcium and magnesium ions contained in the dissolved potassium sulfate water react with carbon dioxide in the air to form insoluble calcium carbonate, and magnesium carbonate is attached to the outlet of the drip hole , both lead to blockage of the fertilization drip hole in the process of flushing fertilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] This embodiment includes the following steps:

[0019] (1) Preparation of spray aid: make sulfuric acid into an aqueous solution with a mass fraction of 68%;

[0020] (2) Spray the auxiliary agent prepared in step (1) onto the surface of the raw material potassium sulfate, and the spraying amount of the auxiliary agent is 4% of the mass fraction of the raw material potassium sulfate;

[0021] The raw material potassium sulfate is the wet potassium sulfate product obtained by filtering in the conventional potassium sulfate production process (but the calculation basis of the percentage is the weight of potassium sulfate on a dry basis, the same below);

[0022] (3) Spray the surface modifier aqueous solution to the wet potassium sulfate after spraying the auxiliary agent, the mass percentage concentration of the surface modifier aqueous solution is 2%, and the spraying amount of the surface modifier aqueous solution is the raw material potassium sulfate 0.9‰ of mass fra...

Embodiment 2

[0029] This embodiment includes the following steps:

[0030] (1) Preparation of spray aid: Make potassium bisulfate into an aqueous solution with a mass concentration of 30%.

[0031] (2) Spray the auxiliary agent prepared in step (1) onto the surface of the raw material potassium sulfate, and the spraying amount of the auxiliary agent is 2% of the mass fraction of the raw material potassium sulfate;

[0032] Described raw material potassium sulfate is the wet potassium sulfate product obtained by filtering in the potassium sulfate production process;

[0033] (3) Spray the surface modifier aqueous solution to the potassium sulfate product after spraying the auxiliary agent, and the mass percentage concentration of the surface modifier aqueous solution is 1%; the spraying amount of the surface modifier aqueous solution is 0.1‰ of potassium mass fraction. The surface modifier is polyacrylamide;

[0034] (4) Dry the wet potassium sulfate sprayed in step (3) at 100°C for 2 ho...

Embodiment 3

[0038] This embodiment includes the following steps:

[0039] (1) Preparation of spray aid: make phosphoric acid into an aqueous solution with a mass fraction of 65%;

[0040] (2) Spray the auxiliary agent prepared in step (1) onto the surface of the raw material potassium sulfate, and the spraying amount of the auxiliary agent is 1.5% of the mass fraction of the raw material potassium sulfate;

[0041] Described raw material potassium sulfate is commercially available potassium sulfate product; Add the water that is equivalent to commercially available potassium sulfate weight 12% to moisten before spraying;

[0042] (3) Spray the surface modifier aqueous solution to the potassium sulfate product after spraying the auxiliary agent, the mass percentage concentration of the surface modifier aqueous solution is 2%, and the spraying amount of the surface modifier aqueous solution is the mass of potassium sulfate 1.5‰ of the fraction. The surface modifier is sodium dodecylsulfon...

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Abstract

The invention discloses a method for producing instant potassium sulfate. The method comprises the following steps: (1) preparing a spraying aid, namely preparing an inorganic acid, acid anhydride or an acid type inorganic salt into an aqueous liquid; (2) spraying the prepared aid to the surface of potassium sulfate; (3) spraying an aqueous liquid of surfactants to the surface of the potassium sulfate subjected to aid spraying; (4) drying wet potassium sulfate on which the aid and aqueous liquid of surfactants are sprayed; and (5) crushing the potassium sulfate product, and packaging to obtain a finished product. The processing technology is simple, a small amount of aids are sprayed on the basis that the original potassium sulfate production process is not changed, the surface performance of the potassium sulfate is changed, namely an instant potassium sulfate product is obtained, and the defect that the potassium sulfate is agglomerated due to moisture absorption in the storage process is overcome according to the obtained product. Moreover, the potassium sulfate can be rapidly dispersed and dissolved in water, and the problem that drip holes are blocked in the flush fertilization process is solved.

Description

technical field [0001] The present invention relates to a kind of production method of potassium sulfate, especially relate to a kind of method of producing instant potassium sulfate. Background technique [0002] Potassium sulfate is a kind of chlorine-free, high-quality and high-efficiency potassium fertilizer, especially in the cultivation of chlorine-avoiding crops such as tobacco, grapes, sugar beets, tea trees, potatoes, flax and various fruit trees. It is an indispensable and important fertilizer. However, the commercial potassium sulfate obtained by the conventional production process has low solubility at room temperature, slow dissolution rate, and low work efficiency during fertilization operations. When crops are planted with potassium sulfate aqueous solution for large-scale drip irrigation, undissolved potassium sulfate particles and calcium and magnesium ions contained in the dissolved potassium sulfate water react with carbon dioxide in the air to form insolu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05D1/02
Inventor 胡淑曾孙成高汤建良郑贤福
Owner CHANGSHA DESIGN & RES INST OF CHEM IND MIN
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