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A kind of preparation method of environment-friendly anti-hard water fulvic acid potassium

A kind of potassium humate, environment-friendly technology, applied in the field of agricultural chemical production, can solve problems such as poor hard water resistance

Active Publication Date: 2021-08-03
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention aims to solve the problem of poor hard water resistance of potassium fulvic acid prepared by the existing method, and provides an environmentally friendly preparation method of potassium fulvic acid that is resistant to hard water

Method used

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specific Embodiment approach 1

[0020] Specific embodiment one: the preparation method of the environmentally friendly anti-hard water fulvic acid potassium of the present embodiment comprises the following steps:

[0021] 1. Suspend coal powder in water, add H 2 o 2 、NaNO 3 With solid acid catalyst, stirring reaction at 50~100°C for 4-20 hours;

[0022] 2. Add KOH to the reaction system, then adjust the pH value of the solution to 9.0 with ammonia water, continue to stir for 2 hours, and centrifuge to obtain the liquid potassium fulvic acid solution;

[0023] 3. Concentrate the potassium fulvic acid solution in vacuum, and obtain solid potassium fulvic acid by spray drying.

specific Embodiment approach 2

[0024] Embodiment 2: This embodiment differs from Embodiment 1 in that the pulverized coal is brown coal powder or weathered coal powder, and the content of humic acid in the pulverized coal is more than 35%; the others are the same as Embodiment 1.

specific Embodiment approach 3

[0025] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the particle size of the pulverized coal is 60-200 mesh; others are the same as Embodiment 1 or Embodiment 2.

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Abstract

An environment-friendly preparation method of potassium fulvic acid potassium which is resistant to hard water aims to solve the problem that the potassium fulvic acid humate product prepared by the existing method is poor in hard water resistance. Method: 1. Suspend coal powder in water, add H 2 o 2 、NaNO 3 and solid acid catalyst, stirring reaction, 2. Add KOH to the reaction system, then adjust the pH value of the solution to 9.0 with ammonia water, continue to stir, and centrifuge, the obtained liquid is potassium fulvic acid solution; 3. Potassium fulvic acid The solution was concentrated in vacuum, and solid potassium fulvic acid was obtained by spray drying. The potassium fulvic acid prepared by the invention has high anti-hard water activity, and under the condition of no anti-coagulation additive, no flocculation phenomenon occurs when the dilute solution prepared in 30-degree hard water is placed for 120 hours. The invention is used for preparing potassium fulvic acid.

Description

technical field [0001] The invention relates to the technical field of agricultural chemical production, in particular to a preparation method of potassium fulvic acid. Background technique [0002] Potassium fulvic acid is an important plant growth promoter, which is widely used in the compatibility of economic crop foliar fertilizers; the hard water resistance of potassium fulvic acid is one of the important indicators reflecting the stability of its dilution in practical applications. Generally, the flocculation time of potassium fulvic acid produced from lignite or weathered coal in moderately hard water (15-20 degrees) is less than 48 hours; the higher the hardness of the dilution water, the shorter the flocculation time; potassium fulvic acid After flocculation, it will seriously affect the absorption of plants, reduce the fertilizer efficiency, and may block the spraying equipment at the same time; therefore, improving the hard water resistance of potassium fulvic aci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05F11/02
CPCC05F11/02
Inventor 由君曹茜娴井斌武文菊喻艳超刘波
Owner HARBIN UNIV OF SCI & TECH
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