Water-soluble nano material supercritical carbon dioxide anti-solvent preparing device

Abstract

The invention relates to a preparation device for water-soluble nanometer material supercritical carbon dioxide anti-solvent, comprising a high-pressure pump for carbon dioxide, a high-pressure pump for solution, a nozzle, a crystallization reactor, a whole filtration membrane crystallizer, a separation reactor, and a cyclone separator, which is characterized in that: the nozzle and the whole filtration membrane crystallizer are arranged in the crystallization reactor, the aperture of the nozzle outlet is 1 to 1000um, the aperture of the whole filtration membrane crystallizer is 50 to 500nm, the cyclone separator is connected with the whole filtration membrane crystallizer arranged in the crystallization reactor, thus forming a closed recovery system for products. The preparation device has the advantages of large whole filtration membrane crystallizer area, fast crystallization, small particle size, uniform distribution, high crystallization rate of more than 80 percent, automatic collection of products without opening the cover of the crystallization reactor, ability to conversely blow the whole filtration membrane crystallizer utilizing carbon dioxide, and closely select products through the cyclone separator, thorough collection of products, rapid recovery of filter membrane flux, no pollution to environment, not harm to human body, less solvent consumption, high separation efficiency, fast speed, short cycle, low energy consumption, and easy operation.

Description

Technical field [0001] The invention belongs to a material particle size modification device in the fields of chemical industry and pharmacy, in particular to a device for preparing water-soluble nanometer material supercritical carbon dioxide anti-solvent. Background technique [0002] At present, the methods for preparing ultrafine powders are divided into two categories, one is physical method and the other is chemical method. The physical method has derived two categories of crushing method and construction method; the chemical method has derived precipitation method, hydrolysis method, spray drying method, freeze drying method and gas phase reaction method. The crushing method is to use various external forces, such as mechanical force, flow capacity, chemical energy, sound energy, thermal energy, etc. to crush the existing solid block into ultrafine powder; Mill, ball mill, medium agitation mill, high-speed rotary mill, jet mill, micro jet mill, vibration mill, ball m...

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Problems solved by technology

Utilize the mutual shearing, impact and grinding between the medium and the material to pulverize the material particles. Among the above pulverizing methods, ball mills, vibrating mills and stirring mills have the following deficiencies due to the use of grinding media: (1) grinding media The size determines that the prepared ultrafine powder is difficult to reach the submicron level; (2) the abrasion of the grinding media causes impurities to be mixed into the product, reducing the purity of the product

However, due to the small area of ​​the inner membrane of the crystallization kettle, the crystallization is slow, the yield is low, and the filter membrane is easy to be blocked. The product removal is still manual operation, the product collection is not thorough, and pollutes the environment and endangers the body.

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