Supercritical fine particle preparation device_Supercritical fine particle preparation device manufacturer

-- Supercritical fine particle preparation device
1. Overview:
The development of ultrafine particles, especially nanoscale particles, has become a hot field in the current high-tech, in materials, chemical industry, light industry It is widely used in engineering, metallurgy, electronics, biomedicine and other fields. There are many ways to prepare ultrafine particles. Supercritical fluid deposition technology is a new technology under research. In supercritical conditions, reducing the pressure can lead to the generation of supersaturation, and a high saturation rate can be achieved, and solid solutes can crystallize out of the supercritical solution. Since this process takes place in a quasi-homogeneous medium, the crystallization process can be controlled more accurately. It can be seen that solid deposition from supercritical solutions is a promising new technology that can produce fine particles with very small average particles and can control their size distribution.
Several different supercritical fluid deposition technologies have been proposed, such as
,
,
,
,
, etc. The specific process is based on user requirements. specified.
-- 2.
-- Supercritical fine particle preparation device
-- Example process:
-- The following mainly introduces the continuous operation gas antisolvent crystallization process (
-r) Experimental setup. When performing
-r operation, use
-r pump to send
-r to the top of the crystallizer, and the pressure of the crystallizer is controlled by the back pressure valve.
-- Before entering the pump, use a cooler to cool it to
-- below ℃ to prevent cavitation. The crystallizer is installed in an air bath, and its temperature is adjusted by a temperature controller, a heater and a circulating fan. The separator is installed after the crystallization kettle, and the temperature is controlled by water bath circulation. When
-- Supercritical Fine Particle Preparation Device
- r After the system is stable, use a high-pressure pump to move the solution from the storage bottle through the nozzle into the crystallizer. The sub-millimeter suction droplets ejected from the nozzle are dispersed in a continuous medium composed of anti-solvent gas, and solute particles are precipitated due to the expansion and evaporation of the droplets. There are glass cylinders and metal filter plates in the crystallizer to collect particles. After the fluid mixture leaves the crystallizer, it is depressurized in the separator. When enough particles are collected, stop the solution supply and continue to pass
-- into the crystallizer to remove the residual solvent on the particles.
-- Telephone:
-- Mobile:
-- Address: Donghuan Road, Puyang City, Henan Province
- No. r