Soxhlet extractor capable of preventing thermal degradation

Abstract

The invention relates to a soxhlet extractor capable of preventing thermal degradation. The soxhlet extractor comprises an extracting pipe, a siphon, a U-shaped elbow, a flask, a branch pipe and a condenser pipe which are sequentially communicated together, wherein the lower end of the condenser pipe is communicated with the extracting pipe to form a loop structure which is mutually communicated;a rectifying pipe is further arranged on the branch pipe, and the condenser pipe, the extracting pipe and the flask are sequentially arranged from top to bottom; the upper end of the branch pipe is communicated with the middle of the condenser pipe, solvent steam is prevented from contacting the extracting pipe, the extracting pipe is prevented from being affected by heat brought by the steam, anda thermo-sensitive matter in the extracting pipe cannot be affected by high temperature; a contact part between the flask and the extracting pipe is changed into the U-shaped elbow disclosed by the invention; in use, the U-shaped elbow can form liquid seal at the bottom by liquid guided into by the siphon, hot steam in the flask cannot pass through the U-shaped elbow, heat cannot be transmitted to the bottom of the extracting pipe, and the thermo-sensitive matter in the extracting pipe cannot be affected by the high temperature.

Description

technical field [0001] The invention relates to a Soxhlet extractor, in particular to a Soxhlet extractor capable of preventing thermal degradation. Background technique [0002] In the prior art, the Soxhlet extractor is mostly used in the laboratory to extract (such as figure 2 Shown) Utilize the principle of solvent reflux and siphon to continuously extract the substance to be extracted by pure solvent, which not only saves solvent but also has high extraction efficiency. Place the extract to be extracted in the extraction tube, the lower end of the extraction tube is connected with the flask containing the solvent, and the upper end is connected with the condenser tube. Heating the flask to make the solvent boil, the vapor rises through the branch of the extraction tube, is condensed and dripped into the extraction tube, the solvent and the extract are in contact for extraction, when the solvent level exceeds the highest point of the siphon tube, the solvent containing ...

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Problems solved by technology

[0003] Heat-sensitive substances, especially heat-sensitive substances that are easily degraded or denatured when exposed to high temperatures or when their own temperature rises to a certain temperature, if the above-mentioned Soxhlet extraction tube is used for extraction, since the upper cavity of the extraction tube is connected to the branch pipe, the hot steam will Filling the upper cavity of the extraction tube, the liquid surface in the lifter is easily heated, and the inner wall of the upper cavity is also easily heated, and the heat is transmitted to the entire extraction tube along the glass wall, and the heat of the beaker itself is also transmitted to the extraction tube through the contact position , the above situation will make some parts of the extraction tube have a higher temperature, resulting in thermal degradation or denaturation of heat-sensitive substances

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