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Environment-friendly hard water resisting potassium fulvic acid preparation method

An environmentally friendly technology of potassium fulvic acid, applied in the field of agrochemical production, can solve the problems of poor resistance to hard water, and achieve the effects of reduced reaction energy consumption, high anti-hard water activity, and low reaction temperature

Active Publication Date: 2019-03-08
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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Examples

Experimental program
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specific Embodiment approach 1

[0029] Specific embodiment 1: The environment-friendly preparation method of hard-water yellow-resistant potassium humate of this embodiment includes the following steps:

[0030] 1. Suspend coal powder in water and add H 2 O 2 , NaNO 3 With solid acid catalyst, stir and react for 4-20 hours at 50~100℃;

[0031] 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, centrifuge, and the resulting liquid is potassium yellow humate solution;

[0032] 3. Concentrate the potassium yellow humate solution in vacuum, and obtain solid potassium humate by spray drying.

specific Embodiment approach 2

[0033] Specific embodiment two: this embodiment is different from specific embodiment one in that the coal powder is brown coal powder or weathered coal powder, and the humic acid content in the coal powder is more than 35%. Others are the same as the first embodiment.

specific Embodiment approach 3

[0034] Specific embodiment three: This embodiment is different from specific embodiment one or two in that the particle size of the coal powder is 60-200 mesh. Others are the same as the first or second embodiment.

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Abstract

The invention discloses an environment-friendly hard water resisting potassium fulvic acid preparation method and aims at solving the problem that a potassium fulvic acid product prepared by an existing method has poor hard water resistance. The method comprises the following steps: 1, suspending pulverized coal in water, adding H2O2, NaNO3 and a solid acid catalyst and performing stirring reaction; 2, adding KOH into a reaction system, then using ammonium hydroxide to adjust the pH value of a solution to 9.0, continuing stirring and centrifugally separating, wherein obtained liquid is a potassium fulvic acid solution; 3, vacuum concentrating the potassium fulvic acid solution and using a spray drying mode to obtain solid potassium fulvic acid. The potassium fulvic acid prepared by the preparation method disclosed by the invention has very high hard water resistance activity; without any anti-coagulation additive, a dilute solution prepared from 30 DEG C hard water has no coagulation phenomenon after being placed for 120 hours. The preparation method disclosed by the invention can be applied to preparing potassium fulvic acid.

Description

Technical field [0001] The invention relates to the technical field of agricultural chemicals production, in particular to a method for preparing potassium yellow humate. Background technique [0002] Potassium yellow humate is an important plant growth promoter, which is widely used in the compatibility of cash crop foliar fertilizers. The hard water resistance of potassium yellow humate is one of the important indicators reflecting the stability of its diluent in practical applications. Generally, potassium yellow humate produced from lignite or weathered coal is in moderately hard water (15-20 degrees) The flocculation time is less than 48 hours. The higher the hardness of the dilution water, the shorter the time for flocculation to occur. After flocculation, potassium yellow humate will seriously affect its absorption by plants, reduce fertilizer efficiency, and may block spraying equipment. Therefore, improving the hard water resistance of potassium yellow humate is one o...

Claims

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Application Information

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Patent Type & Authority Applications(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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