Abstract: The synthesis of polycarbonate (PC) by melt transesterification from diphenol carbonate (DPC) with 4,4’-dihydroxy-diphenyl-2,2-propane (BPA) using tetraethyl ammonium hydroxide (TEAH) as catalyst was experimentally studied. The properties of the resulting polymer was influenced markedly by the operating conditions including the concentration of catalyst，the ratio of DPC/BPA and reaction times in different processing stages. Compared with NaOH，using TEAH as catalyst under the optimized process conditions，an almost colorless PC was obtained with relatively higher molecular weight，narrower molecular weight distribution and less branching and rearranging side-products.