Method for Preparing Granular Polycarbonate

A method for preparing granulated polycarbonate particles, comprising:

• mixing a polymerization reaction solution comprising polycarbonate and an organic solvent, and an anti-solvent solution comprising water and an anti-solvent to prepare a mixed solution;
• heating the mixed solution to remove the organic solvent;
• and
• drying or filtering the mixed solution to obtain granular polycarbonate particles,
• wherein the anti-solvent satisfies all of the following Equations 1 to 3,
• 11.8<Ra<14.1 [Equation 1]
• in Equation 1, Ra is a Hansen Solubility Parameter (HSP) of an anti-solvent for polycarbonate;
• −0.88<Δμ<1.95 [Equation 2]
• in Equation 2, Δμ is a mixing energy of an anti-solvent and polycarbonate;
• Δμ′<4.0 [Equation 3]
• in Equation 3, Δμ′ is a mixing energy of the anti-solvent and water.