Garlic essential oil extraction method

Abstract

The invention discloses a garlic essential oil extraction method which comprises the following steps: carefully choosing and cleaning garlic; crushing the cleaned garlic to powder with diameter of 0.2-0.5mm; sending the crushed garlic powder into a distillation column, adjusting pressure in the distillation column to 0.10-0.20MPa, and keeping distillation for at least 4 hours when temperature in the distillation column rises to 120-150 DEG C; sending a distillate into a cooling tower for cooling; and sending a condensate in the cooling tower into an oil-water separating column to separate garlic essential oil, where a disk-shaped separating disc with several through holes arranged in the surface is also disposed inside the distillation column. Purity of garlic essential oil extracted by the above garlic essential oil extraction method is high; garlic distillation efficiency is raised; and extraction rate of garlic essential oil can reach 0.2-0.5%. In addition, byproducts of garlic essential oil are fully utilized, and economic value is raised. The method provided by the invention is convenient to operate, is cost-saving, and also can be applied in extraction of essential oil of ginger, rapeseed, soybean and the like.

Description

technical field [0001] The invention relates to the technical field of food processing, in particular to a method for extracting garlic essential oil. Background technique [0002] Garlic oil is a broad-spectrum antibacterial substance, which has various pharmacological functions such as activating cells, promoting energy production, increasing antibacterial and antiviral capabilities, accelerating metabolism, and relieving fatigue. Therefore, it is widely used in many fields. China is an important producer and exporter of garlic in the world, but there is relatively little deep processing of garlic, mainly exporting primary products and raw material products. In order to enhance international competitiveness, it is very necessary to carry out deep processing of garlic, especially to extract high-quality garlic oil, so as to develop the product in the direction of high added value. This just requires continuous improvement to the extraction process of garlic oil. [0003] ...

AI Technical Summary

Problems solved by technology

[0003] At present, the processing methods of ginger oil and garlic oil mainly use steam distillation, extraction, supercritical CO 2 Extraction, ultrasonic-assisted extraction, etc., the traditional steam distillation extraction method, the extraction time is long, and the extraction rate of garlic oil is relatively low, the essence of garlic is not effectively used, resulting in waste of raw materials, high production costs, and the utilization of by-products Poor, the wastewater has not been effectively treated; in addition, the use of extraction methods and other methods requires the addition of organic solvents such as ethanol, ether, benzene, etc. There is a certain compatibility between the solvent and the essential oil, and it is difficult to completely separate, resulting in poor purity of the essential oil and affecting the quality of the essential oil. Color, aroma and taste indicators, which in turn affect the quality of the product

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