Patent ID: 8901292

Claim:
A method of mass production of a tetrakis(p-nitrophenyl)porphyrin, the method comprising the steps of: (a) starting a reaction between fuming HNO 3 and H 2 TPP at a ratio equal or greater than 35:1 to form a tetrakis(p-nitrophenyl)porphyrin in a reaction solution; (b) stopping the reaction by adding an ammonia solution to the reaction solution; (c) extracting an organic layer from the reaction solution and drying it to afford a residual powder; (d) applying the residual powder onto a silica gel; (e) eluting the silica gel with a solvent to remove impurities and to leave the tetrakis(p-nitrophenyl)porphyrin adsorbed to the silica gel; and (f) obtaining the tetrakis(p-nitrophenyl)porphyrin by releasing it from the silica gel with a base solution.