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Preparation method of micronutrient element zinc-manganese chelate

A technology of micronutrient and elemental zinc, which is applied in the field of preparation of zinc-manganese chelates, achieves the effect of simple method and increased content ratio

Inactive Publication Date: 2020-01-03
上海永通生态工程股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although zinc glucoheptonate and manganese glucoheptonate are suitable for use in alkaline soils, they are still rarely used in fertilizers

Method used

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  • Preparation method of micronutrient element zinc-manganese chelate
  • Preparation method of micronutrient element zinc-manganese chelate
  • Preparation method of micronutrient element zinc-manganese chelate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Preparation of aqueous solution of glucoheptononic acid

[0039] Solid sodium glucoheptonate (Wuhan Yuancheng Science and Technology Development Co., Ltd. industrial grade) was formulated into an aqueous solution, and the activated large-pore strong acid cation exchange resin (Shanghai Jinkai Resin Co., Ltd. D301) carried out ion exchange to obtain a mass percentage of 10% aqueous solution of glucoheptonic acid.

[0040] 2) Preparation of zinc hydroxide or manganese hydroxide

[0041] Preparation of zinc hydroxide: Stir saturated zinc sulfate solution, and dropwise add 0.2M sodium bicarbonate solution at the same time, stop dropping when white precipitate appears at pH 7.5-8; stop stirring and stand still for 24 hours; filter, wash, pump Just dry.

[0042] Preparation of manganese hydroxide: Stir the saturated manganese sulfate solution, and add dropwise a 0.2M sodium bicarbonate solution at the same time, stop the dropwise addition when a brown precipitate appears...

Embodiment 2

[0046] 1) Preparation of aqueous solution of glucoheptononic acid

[0047] Solid sodium glucoheptonate (Wuhan Yuancheng Science and Technology Development Co., Ltd. industrial grade) was formulated into an aqueous solution, and the activated large-pore strong acid cation exchange resin (Shanghai Jinkai Resin Co., Ltd. D301) carried out ion exchange to obtain a mass percentage of 20% aqueous solution of glucoheptonic acid.

[0048] 2) Preparation of zinc hydroxide or manganese hydroxide

[0049] Preparation of zinc hydroxide: Stir saturated zinc sulfate solution, and dropwise add 0.2M sodium bicarbonate solution at the same time, stop dropping when white precipitate appears at pH 7.5-8; stop stirring and stand still for 24 hours; filter, wash, pump Just dry.

[0050]Preparation of manganese hydroxide: Stir saturated manganese sulfate solution, and dropwise add 0.2M sodium bicarbonate solution at the same time, stop the dropwise addition when a brown precipitate appears above ...

Embodiment 3

[0054] 1) Preparation of aqueous solution of glucoheptononic acid

[0055] Solid sodium glucoheptonate (Wuhan Yuancheng Science and Technology Development Co., Ltd. industrial grade) was formulated into an aqueous solution, and the activated large-pore strong acid cation exchange resin (Shanghai Jinkai Resin Co., Ltd. D301) carried out ion exchange to obtain a mass percentage of 30% aqueous solution of glucoheptonic acid.

[0056] 2) Preparation of zinc hydroxide or manganese hydroxide

[0057] Preparation of zinc hydroxide: Stir saturated zinc sulfate solution, and dropwise add 0.2M sodium bicarbonate solution at the same time, stop dropping when white precipitate appears at pH 7.5-8; stop stirring and stand still for 24 hours; filter, wash, pump Just dry.

[0058] Preparation of manganese hydroxide: Stir saturated manganese sulfate solution, and dropwise add 0.2M sodium bicarbonate solution at the same time, stop the dropwise addition when a brown precipitate appears above...

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Abstract

The invention provides a preparation method of a micronutrient element zinc-manganese chelate. The preparation method comprises the following steps: subjecting an aqueous sodium glucoheptonate solution to ion exchange through activated large-aperture strong acid cation exchange resin to obtain an aqueous glucoheptonic acid solution; adding the aqueous glucoheptonic acid solution into a reactor, adding zinc hydroxide or manganese hydroxide while stirring, carrying out heating, continuing stirring until a reaction solution becomes clear from turbid, and ending the reaction; and performing evaporating, concentrating and drying to obtain solid zinc glucoheptonate or solid manganese glucoheptonate. The method has the advantages of easiness, feasibility and capacity of increasing the content ratio of nutrient elements.

Description

technical field [0001] The invention relates to a zinc-manganese chelate; in particular, it relates to a preparation method of a zinc-manganese chelate. Background technique [0002] Trace elements zinc and manganese play a very important role in plant nutrition. Although the soil contains zinc and manganese, its effective form is not enough to meet the nutritional needs of plants, making plants show symptoms of zinc and manganese deficiency. [0003] There are currently many micronutrient fertilizers, but their effectiveness in the soil is not satisfactory. Although EDTA-Zn, EDTA-Mn, EDDHA-Zn, EDDHA-Mn, etc. have good effectiveness, their effect in alkaline soil is very poor. Glucoheptonic acid is a polyvalent organic chelating agent with strong chelating ability. In alkaline environment, zinc manganese glucoheptonate has excellent stability, and its chelate stability constant is higher than that of EDTA, EDDHA, DTPA Stability constants for chelating agents. As an excel...

Claims

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Application Information

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IPC IPC(8): C05D9/02C05F11/00C07C59/105C07C51/41C07C51/47
CPCC05D9/02C05F11/00C07C51/412C07C51/47C07C59/105
Inventor 石称华钱志红陈唐
Owner 上海永通生态工程股份有限公司
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