Preparation method of high-purity food-grade fulvic acid
By employing organic acid extraction, hollow fiber filtration, vacuum distillation, and heterogeneous membrane electrodialysis processes, combined with online detection parameter control, the problem of low purity in fulvic acid extraction has been solved, enabling the preparation and recycling of high-purity fulvic acid that meets food and pharmaceutical grade requirements.
Patent Information
- Application Number
- CN202610501902.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-16
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies make it difficult to extract high-purity fulvic acid from weathered coal or lignite, resulting in problems such as low product purity, easy leaching of heavy metals, high acid and alkali consumption, high wastewater salinity, heavy environmental burden, and difficulty in meeting food and drug safety requirements.
The technology route combines organic acid extraction, hollow fiber filtration, first vacuum distillation, resolution, heterogeneous membrane electrodialysis, and second vacuum distillation. The extraction control module dynamically determines and adjusts the process based on online detection parameters such as pH and conductivity, forming a closed-loop resource cascade utilization process.
It achieves efficient extraction and purification of fulvic acid under mild conditions, obtaining high-purity fulvic acid product with a fulvic acid content of greater than or equal to 95%, reducing the introduction of inorganic salts and heavy metal impurities, reducing material consumption and waste emissions, and possessing value for green manufacturing and industrial applications.
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Abstract
Citation Information
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