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Equipment for Purification

Coupling technologies of extraction, crystallization, and filtration

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Home Chemical Solutions Purification

Core Competencies
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Extraction Crystallization & Filtration
Types of Equipment Involved
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Core Competencies

Extraction: The extract phase is subjected to evaporation, distillation, or back-extraction to recover the solvent and obtain a concentrated or purified products

Melt crystallization separates components by melting point differences. The target component crystallizes out, followed by solid-liquid separation for purification.

Filtration: A porous medium allows liquid or gas to pass through while retaining solid particles, achieving solid-liquid or solid-gas separation.

Extraction Crystallization & Filtration

Extraction, Crystallization, and Filtration

Technical Concept

Based on the solubility, partition coefficient, and melting point/crystal form of the material system, an extraction column first separates and enriches the target component. A crystallizer then controls supersaturation and crystal growth to produce high-purity, regular crystals. Finally, precision filtration rapidly separates crystals from the mother liquor while enabling filtrate recycling and filter cake washing, establishing a closed-loop, high-efficiency process.

Extraction, Crystallization, and Filtration

Types of Equipment Involved

Crystallization Unit

Corrosion resistance: Stainless steel or special alloys are used to resist acid corrosion.

Efficient heat transfer: External circulation cooling or internal coils are often adopted, combined with powerful agitation to prevent crystal precipitation and wall scaling.

Multi-stage flash evaporation: Crystals are precipitated through stepwise pressure reduction and temperature reduction (without heat exchange surfaces), which resists fouling and saves energy.

Extraction Column

Large processing capacity, capable of continuous operation, suitable for large-scale industrial production.

Relatively simple structure with good sealing performance, suitable for toxic and flammable systems.

Through the design of internal tower components, high mass transfer efficiency and separation performance can be achieved.

Wastewater Filter

Plate Crystallizer

1. Batch melt crystallizer;

2. Processing capacity applicable to equipment from 1L to 50m³;

3. Wide range of applications: including but not limited to durene, bisphenol, ethylene carbonate, toluic acid, refined benzene, and other materials;

4. Purity up to 99%;

5. Single-tube testing available before industrial-scale application.

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2026-04-07

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