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Preparing method of coal fulvic acid with high purity

A fulvic acid, high-purity technology, applied in the direction of organic chemistry, can solve the problems of low extraction rate and complicated process, and achieve the effects of reducing molecular weight, simplifying operation and reducing cost

Inactive Publication Date: 2017-02-22
河北源本生物科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process is complicated and the extraction rate is not high

Method used

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  • Preparing method of coal fulvic acid with high purity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 100 g of Yunnan Shiping peat with a particle size of 200 mesh and put it in a stainless steel reactor, add 800 ml of 0.5 mol / L of KOH, and use an ultrasonic generator produced by Crecson Ultrasonic Co., Ltd. to feed in ultrasonic waves with a power of 500 W and a frequency of 80 KHz. React at 80°C for 1 hour; centrifuge the obtained suspension with a high-speed centrifuge of the type 2-16KL / 2-16P produced by Huobajiu Industrial Co., Ltd., the centrifuge speed is 10000r / min, discard the residue, and obtain humic acid Potassium humate crude solution; under the condition of 0.4MPa pressure and operating flow rate of 10L / min, the potassium humate crude solution was passed through a microfiltration membrane with a pore size of 50 μm, the filtrate was collected, and the intercepted residue was discarded; under the pressure of 1.0MPa, the The filtrate is sequentially pumped into ultrafiltration membranes with molecular weights of 1500da and 500da, and the retentate after ...

Embodiment 2

[0029] Weigh and crush 100 g of Yunnan Shiping peat with a particle size of 200 mesh in a stainless steel reactor, add 600 ml of 0.5 mol / L KOH, and the rest of the steps are the same as in Example 1 to obtain fulvic acid powder. After inspection, the FA content of the powder is 98.3% ( dry basis).

Embodiment 3

[0031] Weigh and crush 100 g of Yunnan Shiping peat with a particle size of 200 mesh in a stainless steel reactor, add 1200 ml of 0.5 mol / L KOH, and the rest of the steps are the same as in Example 1 to obtain fulvic acid powder. After inspection, the FA content of the powder is 98.5% ( dry basis).

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Abstract

The invention provides a preparing method of coal fulvic acid with high purity. The preparing method comprises the steps of using aqueous alkali to extract peat or brown coal, conducting centrifugation and microfiltration to remove undissolved substances and macromolecular colloid, then using an ultrafiltration membrane to cut out a fulvic acid salt fraction with molecular weight being 300-2500 da, then removing residual inorganic salt through an ion exchange membrane, transforming the fulvic acid salt fraction into a fulvic acid solution, and conducting drying to obtain a pharmaceutical grade fulvic acid with purity being 98% or above. The preparing method is simple in process, low in energy consumption and high in extraction ratio and purity of the fulvic acid, and obviously reduces environmental pollution.

Description

technical field [0001] The product of the invention belongs to the field of fine chemical preparations, and in particular relates to a preparation method of high-purity coal fulvic acid. [0002] technical background [0003] Fulvic acid (codenamed FA) is a mixture of aliphatic-aromatic complex organic carboxylic acids extracted from low-grade coal (including peat, lignite and weathered coal). Due to the common action of various functional groups, FA has a wide range of chemical and biological activities. It has been widely used not only in agriculture and animal husbandry, but also in food, health care and medical fields. Aging, anti-virus, anti-inflammatory and blood circulation, tumor suppression, enhancement of immunity, promotion of microcirculation, prevention and treatment of cardiovascular and cerebrovascular diseases, etc. At present, the extraction technology of FA is still basically at the level of traditional acid extraction or alkali dissolution-acid analysis, a...

Claims

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Application Information

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IPC IPC(8): C08H99/00C07G99/00C08H7/00
CPCC08H6/00C07G99/00
Inventor 董志强白彦峰
Owner 河北源本生物科技有限责任公司
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