Shares of Petrosonic Energy Inc. (OTC: PSON), a development stage company engaged in the treatment and upgrading of heavy oil through sonicated solvent de-asphalting, are up sharply in trading today. At last check, PSON shares were trading 6.30% higher at $1.35 on above average volume of 1.20 million. The stock hit an intra-day high of $1.36 earlier today. PSON shares have gained 12.50% in the last three trading sessions.