Carbon-supported palladium-ruthenium catalyst for hydropuirication of terephthalic acid

摘要

The ruthenium-incorporated catalyst,(0.3precent Pd-0.2precent Ru)CCM(carbon carbonaceous composite materia)catalyst,has been studied as a candidate to replace an existing 0.5 precnet Pd/C catalyst for hydropuification of curde terephthlalic acid;it give an excellent performance and is a promising catalyst.It has been confirmed that the (0.3precent Pd-0.2precent Ru)/CCM catalyst has higher stability in actual comercial condition and aging in lab condition compared with a commercial catalyst.The increased stability may be explained as the effect of ruthenium to prevent the sintering of supported metal particles.The(0.3precent Pd-0.2precent Ru)CCN catalyst shows equal or less amount of side reaction of benzene ring hydrogenation.The dust from carbon support can also be decreased from the (0.3precent Pd-0.2precent Ru)/CCN catalyst due to the increased strength of the CCN.The (0.3precent -0.2precent Ru)/CCN catalyst may be very competitive to the existing catalyst due to the inexpensive ruthenium and the expected long life of the catalyst.