Soxhlet extractor - high efficiency - Huaqiang Electronic Network

Soxhlet Extractor

ZF-13 Type

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Soxhlet Extractor

Overview

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The Soxhlet extractor is an essential tool in laboratory settings, designed for the efficient extraction of compounds from solid materials. It operates based on the principles of solvent reflux and siphoning, allowing repeated contact between the solid sample and a pure solvent. This method significantly enhances the efficiency of extracting target components, making it ideal for multiple samples at once. Each heating unit can be adjusted independently, enabling experiments under varying conditions or repeat trials with the same parameters, thus saving time and improving overall productivity. The device consists of an extraction flask, an extraction tube, and a condenser. The extraction tube is equipped with siphons and connecting pipes, ensuring all joints are tightly sealed to prevent leakage. By continuously using fresh solvent, the extraction process achieves high efficiency and precision.

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Soxhlet Extractor

Main Technical Parameters

Number of samples per batch: 3

Extraction Flask Volume: 500ml per piece

Extraction Solvent Can Be Recycled Automatically

Power Supply Voltage: 220V

Electric Heating Power: 300W

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Soxhlet Extractor

Reagents

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Anhydrous Ether or Low Boiling Point Petroleum Ether (AR Grade)

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Soxhlet Extractor

Instructions

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1. Before extraction, the solid material should be finely ground to increase the surface area for better solvent penetration. Place the sample in a filter paper holder inside the extraction chamber. When the solvent is heated, vapor rises through the air tube, condenses, and drips into the extractor. Once the liquid level exceeds the siphon’s highest point, the solvent flows back into the flask, carrying the extracted compound with it. This cycle repeats, maximizing the yield of the desired substance.

2. During the extraction process, place the sample in a degreased filter paper bag and insert it into the extraction tube. Add petroleum ether to the extraction flask, then heat it. The vapor travels up the connecting tube, condenses in the condenser, and drips into the extraction tube. As the liquid level rises, the dissolved compounds are siphoned back into the flask, continuing the cycle until the extraction is complete.

3. Prepare a filter paper tube that fits the extractor size, place the sample inside, and secure it with a cotton thread for easy removal after extraction. Ensure the filter paper tube is close to the wall and does not exceed the siphon height to allow full solvent contact. Avoid any leakage from the tube, which could block the siphon. If the sample is light, use cotton wool to press it down. Connect the lower end of the extractor to a flask containing the solvent and attach a reflux condenser. Heat the flask, causing the solvent to vaporize, rise, condense, and drip back into the extractor, repeating the process until the extraction is complete.

4. Add the solvent and a few boiling chips (not glass beads) to the flask to prevent bumping during the heating process.

5. The exact reflux time varies depending on the sample. Extraction is complete when the extract becomes colorless. After stopping the heating, cool the extract and remove the Soxhlet apparatus. Install a condenser for distillation if needed.

Soxhlet Extractor Picture: