Isoborneol-dehydrogenated camphor refining method and equipment therefor

Abstract

The invention relates to an isoborneol-dehydrogenated camphor refining method. The method sequentially comprises a dehydrogenation reaction and solvent recovery step, a camphor vaporization subliming step and a camphor sublimation collecting step, wherein the dehydrogenation reaction and solvent recovery step comprises the steps of feeding a mixed solution of the isoborneol and an isoborneol dissolving solvent and a dehydrogenation catalyst into a reactor, heating the reactor so as to realize dehydrogenation reaction, exhausting hydrogen gas produced from the dehydrogenation reaction by using a fractionating column, and recovering the isoborneol dissolving solvent. According to the method, the disadvantage in the existing isoborneol-dehydrogenated camphor refining process that the steps of dehydrogenation reaction, solvent recovery and vaporization subliming are required to be carried out sequentially in different devices is overcome, the integration of a dehydrogenation reactor, a solvent recovery device and a sublimation device can be realized, and thus the steps of dehydrogenation reaction, solvent recovery and vaporization subliming can be carried out in the same reactor; and the method has the advantages of reducing working procedures and greatly reducing manpower and equipment costs.

Description

technical field [0001] The invention relates to a method and equipment for refining camphor by isoborneol dehydrogenation, which are applied to the production of camphor. Background technique [0002] Synthetic camphor is also called camphorone, molecular formula C 10 h 18 O, is a white crystal with a cool and refreshing smell, easily soluble in organic solvents, and easily sublimated. Synthetic camphor has a wide range of uses, mainly including: (1) direct medicinal use, which can be used in external ointments for traumatic injuries, promoting blood circulation and medicinal oil (water) preparations, and can also be used in oral Chinese patent medicine preparations for relieving summer heat, refreshing the brain and strengthening the stomach; (2) Pharmaceutical intermediates, used for the production of pharmaceutical intermediates camphorsulfonic acid and phenylglycine for central nervous system stimulants; (3) Industrial raw materials, such as celluloid, plasticizers, sm...

AI Technical Summary

Problems solved by technology

In the traditional process, xylene is used as a solvent, and xylene is easy to volatilize into the air, causing great environmental pollution; basic copper carbonate cannot be recycled, and the basic copper carbonate used as a dehydrogenation catalyst decomposes to form copper oxide, which needs to be discharged regularly. The processing cost is high; a separate solvent recovery device and sublimation device are required, and the investment cost is high; the sublimation collection process adopts the natural cooling crystallization method

This method has the disadvantage of difficult temperature control, resulting in serious material loss, low yield, unstable product quality, and long production cycle.

In addition, the collected product camphor needs to be manually entered into the sublimation chamber to shovel the brain, and the production efficiency is low.

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