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Preparation method of compound potassium fulvate

A kind of technology of potassium fulvate and compound type, which is applied in the field of preparation of compound type potassium fulvate, can solve the problems such as poor persistence and weak effect of biochemical potassium fulvate, and achieve cost reduction, good acid adjustment and improvement Soil, the effect of huge application potential

Pending Publication Date: 2022-05-31
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in recent years, there has been less research on the preparation of biochemical potassium fulvate, and the prepared biochemical potassium fulvate has problems such as weak persistence and weak effect.

Method used

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  • Preparation method of compound potassium fulvate
  • Preparation method of compound potassium fulvate
  • Preparation method of compound potassium fulvate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Use different low-priced coal or agricultural and forestry wastes on a dry basis as raw materials, with a mass fraction of 10% HNO 3 Experiment for an oxidizing agent:

[0033] Raw materials and thermal oxidation treatment: according to the solid-to-liquid ratio of 1:20, 10% HNO 3 Add it into a 50mL Erlenmeyer flask, and add the raw materials when it is preheated to 70°C. The ratio of the raw materials is shown in Table 1. The reaction was carried out for 60 min under the conditions of water bath temperature 70° C. and shaking speed 150 rpm.

[0034] Extraction: After the reactant is cooled to room temperature, carry out vacuum filtration to obtain HNO 3 The thermal oxidation residue was washed with water until neutral, and the filtrate was kept, and the upper layer residue was further prepared into potassium fulvic acid.

[0035] Drying: Pour the filtrate into a beaker and dry it in a blast drying oven at 60°C to obtain potassium fulvic acid solids.

[0036] Table ...

Embodiment 2

[0039] Using different low-priced coal and agricultural and forestry waste mixtures with a mass ratio of 1:1 on a dry basis as raw materials, HNO with a mass fraction of 10% 3 Experiment for an oxidizing agent:

[0040] Raw materials and thermal oxidation treatment: according to the solid-to-liquid ratio of 1:20, 10% HNO 3 Put it into the Erlenmeyer flask, and add the mixed raw materials when it is preheated to 70°C. The types of mixed raw materials are shown in Table 2. The reaction was carried out for 60 minutes under the conditions of water bath temperature 70° C. and shaking speed 150 rpm.

[0041] Extraction: After the reactant is cooled to room temperature, carry out vacuum filtration to obtain HNO 3 The thermal oxidation residue was washed with water until neutral, and the filtrate was kept, and the upper layer residue was further prepared into potassium fulvic acid.

[0042] Drying: Pour the filtrate into a beaker and dry it in a blast drying oven at 60°C to obtain ...

Embodiment 3

[0047] With different mass ratios of weathered coal and walnut shells as raw materials, the mass fraction of 10% H 2 SO 4 Oxidizing agent for experiment:

[0048] Raw materials and thermal oxidation treatment: according to the solid-to-liquid ratio of 1:20, first add 10% H 2 SO 4 Add it to the Erlenmeyer flask, and add the raw materials when it is preheated to 80°C. The reaction was carried out for 90 min at a water bath temperature of 90° C. and a shaking rate of 200 rpm.

[0049] Extraction: After the reactant is cooled to room temperature, carry out vacuum filtration to obtain H 2 SO 4 The thermal oxidation residue was washed with water until neutral, and the filtrate was kept, and the upper layer residue was further prepared into potassium fulvic acid.

[0050] Drying: Pour the filtrate into a beaker and dry it in a blast drying oven at 60°C to obtain potassium fulvic acid solids. Table 3 shows the content of fulvic acid in the compound potassium fulvate prepared by d...

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Abstract

The invention provides a preparation method of composite potassium fulvate, which comprises the following steps: respectively mixing low-rank coal such as lignite with agricultural and forestry wastes such as wheat straw, yellow fir and walnut shell mixtures, and preparing the composite potassium fulvate by adopting a thermal oxidation method. Compared with mineral source potassium fulvic acid and biochemical potassium fulvic acid, the composite potassium fulvic acid has the advantages that the cost is greatly reduced, the use of fossil energy such as lignite can be reduced, and the high-value utilization of agricultural and forestry wastes can be realized. The low-rank coal is respectively mixed with agricultural and forestry residues such as wheat straws, yellow fir and walnut shells to synergistically promote a thermal oxidation reaction, the yield of the prepared potassium fulvic acid can reach 48.7%, the content of fulvic acid in the potassium fulvic acid can reach 55.6%, and the content of potassium oxide in the potassium fulvic acid can reach 9.4%. And the application potential is huge.

Description

technical field [0001] The invention belongs to the technical field of humic acid preparation, and in particular relates to a preparation method of compound potassium fulvic acid. Background technique [0002] Potassium fulvic acid is a condensation polymer of polyvalent phenolic aromatic compounds and nitrogen-containing compounds. It is brown powder in appearance and has no toxic and side effects. Due to the characteristics of high load capacity and physiological activity, it can be applied in industries such as agriculture and horticulture. At present, it is widely used as foliar fertilizer and functional water-soluble fertilizer, which can promote plant growth and improve stress resistance. It plays an important role in improving crop drought resistance, and has the effect of increasing production and improving crop quality. The development prospect is objective. [0003] According to different sources of fulvic acid, potassium fulvate is divided into mineral potassium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H7/00C08H8/00
CPCC08H6/00C08H8/00Y02W30/40
Inventor 李晨祎
Owner CHANGZHOU UNIV
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