Apparatus for preparing inorganic compound and method of preparing inorganic compound using the same

A hydrothermal synthesis device for continuously preparing an inorganic slurry using a hydrothermal method, the hydrothermal synthesis device comprising:

• a mixer to mix at least one precursor solution for preparing an inorganic material, injected via at least one supply tube, to prepare an intermediate slurry;
• a connection tube provided at a side of the mixer, continuously discharging the prepared intermediate slurry via the connection tube to a reactor, and having an inner surface contacting a precursor solution mixture on which abrasive polishing has been performed;
• and
• the reactor performing hydrothermal reaction of the intermediate slurry supplied from the connection tube by receiving a liquid stream heated to supercritical or subcritical conditions using a heat exchanger and connected to the connection tube into which the intermediate slurry prepared from the mixer is introduced and to at least one injection tube into which the heated liquid stream is injected;
• and
• wherein the connection tube is provided at an outer portion thereof with a cooling member to dissipate heat transferred from the heated liquid stream in order to maximize the effects of the abrasive polishing with respect to the prevention of clogging in the connection tube.