Method for preparing oxytitanium phthalocyanine charge generating material and apparatus for preparing the same

Abstract

Disclosed herein are a method and an apparatus for preparing oxytitanium phthalocyanine as a charge generating material. The method comprises the steps of homogeneously mixing an oxytitanium phthalocyanine crude with an organic solvent while microwave energy having a frequency of 0.1˜100 GHz and a power of 10˜3,000 W and ultrasonic wave energy having a frequency of 1˜1,000 kHz and a power of 10˜5,000 W are applied thereto, and reacting the mixture at 30˜100° C. for 0.5˜5 hours. The apparatus comprises: a magnetroncapable of generating a frequency of 0.1˜100 GHz and a power of 100˜3,000 W; a mode stirrerfor making the wavelength of microwaves uniform in a microwave container; a PID type temperature controllerfor accurately measurement and controlling the temperature of reactants; a K-type thermocouple shielded from microwaves; a condenser; an agitator, the thermocouple, the condenserand the agitatorbeing inserted into three openings formed at a top of the microwave container; an ultrasonic tipinserted into an opening formed at a bottom of the microwave container; a Pyrex containerinto which the reactants are introduced; and a solvent tank. According to the method and the apparatus, an oxytitanium phthalocyanine charge generating material having superior thermal stability and crystal stability can be prepared in an efficient manner.