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2021

How to repair small extraction equipment?

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Small extraction equipment technology was first applied to large-scale industrial removal of plant factors in coffee beans, and later also applied to extract plant factors from tea, the plant factor content in coffee is 0.6%-3%, and the plant factor content in tea is about 1%-5%, the extracted coffee can be used as a medicinal compress, and coffee without plant factors can meet people's needs, the traditional method uses solvent extraction skills.

There are solvent residues, low extraction rate and other problems, the application of supercritical carbon dioxide fluid extraction technology solves these problems, the purity of the product is greatly improved, carbon dioxide is easy to dissolve, after the extract passes through the separation device, the plant factors are eluted by water, carbon dioxide continues to cycle, sometimes activated carbon is used instead of water to elute plant factors, with the development of skills, the process of extracting plant factors has been greatly improved.

In the more successful is the semi-continuous production method of General Foods' Sol Norman Katz, which is characterized by the fact that when feeding and discharging regularly, the material will be convectioned with the solvent in the equipment, so that the concentration of plant factors in the carbon dioxide fluid will be greatly increased, and the extracted non-plant factor components will return to the substance, so the extracted coffee flavor is still pure.