are discussed,including reaction crystallizer,vapirair wing heat exchanger used in powder MAP drying tower,automatic scraper used in dry tail gas settling chamber.

Study on the settling velocity model of crystal granula in the reactive crystallization process;

Preparation of ultrafine sumatriptan succinate for dry powder inhalation via reactive crystallization;

Progress on granulated potassium sulfate by reactive crystallization method;

High purity nano-sized magnesium hydroxide was prepared by impinging stream reaction crystallization method using bischofite (from Chaerhan salt lake,in Qinghai Province) as raw material.

Formation of magnesium chloride hexammoniate (MgCl 2·6NH 3) is the critical step of the coupled reaction crystallization process, which is an att ractive dehydration process.

Magnesium chloride hexammoniate (MgCl_2·6NH_3) is produced using reaction crystallization method.

Isolation of dehydroabietic acid by reaction-crystallization coupled with ultrasound wave;

Using disproportionated rosin and 2-aminoethanol as raw material and ethanol as reaction solvent, the isolation of dehydroabietic acid from disproportionated rosin by the reaction-crystallization strengthened by ultrasonic wave was studied.

Preparation of micronized ciprofloxacin by reactive precipitation;

The reactive precipitation pathway was explored to synthesize ultrafine particles of salbutamol sulfate.

The efffects of mixing characteristics and chemical characteristics on the precipitation process conducted in a semi-batch stirred tank were investigated and analysed.

On the basis of turbulent theory and the results observed by high speed strobo-scopic microscopic photography for meso-and micro-mixing processes, a mixing mechanism was proposed and then a new mixing - precipitation model including micromixing, turbulent dispersion(meso-mixing)and backmixing(macro-mixing)was established to predict the par-ticls size distribution (PSD).