A wiped-film molecular still for pharmaceutical use

Abstract

The invention discloses a scraping film type molecular distillation apparatus for pharmaceutical application. The scraping film type molecular distillation apparatus comprises a condenser, a cavity rotary shaft and a body, wherein a heating wire is fixed in an interlayer of the body; the cavity rotary shaft is inserted into the body from top to bottom; the cavity rotary shaft is located at the periphery of the outer part of a scraping plate and is fixedly provided with a driven gear; one side of the driven gear is engaged with a driving gear; a motor is fixed at a position, which vertically corresponds to the driving gear, and is arranged on the upper surface of the body; a power output end of the motor is fixed with the driving gear. According to the scraping film type molecular distillation apparatus disclosed by the invention, the rotary shaft for driving the scraping plate to rotate is hollow, so that the rotary shaft can drive the scraping plate to rotate to distribute a stock solution and can also be used as a water pipe for washing; an L-shaped water spraying pipe is fixed at the lower end of the cavity rotary shaft, so that the water spraying pipe can be at a rotary state when being used for spraying water, and furthermore, the inner part of a distillation apparatus body can be washed from all directions through the water spraying pipe; phenomena that dirt is accumulated and bacteria are bred are avoided.

Description

technical field [0001] The invention relates to the technical field of pharmacy, in particular to a wiped-film molecular still for pharmacy. Background technique [0002] The distillation method generally used for raw materials for pharmaceutical production is sub-distillation. The wiped film molecular still is a kind of molecular distillation. Molecular distillation is a distillation method operated under high vacuum. At this time, the mean free path of steam molecules is greater than that of evaporation. The distance between the surface and the condensing surface, so that the difference in the evaporation rate of each component in the feed liquid can be used to separate the liquid mixture. Molecular distillation is suitable for the separation of high boiling point and easily oxidized materials, and can effectively remove impurities such as organic solvent odor in the liquid. However, it is difficult to clean the inside of the distiller with the existing wiped film molecula...

AI Technical Summary

Problems solved by technology

Molecular distillation is suitable for the separation of high boiling point and easily oxidized materials, and can effectively remove impurities such as organic solvent odor in liquids. However, it is difficult to clean the inside of the distiller with the existing wiped film molecular distiller, and the distiller is used all the year round. Difficult to clean can lead to bacteria and dirt buildup inside the still

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