Along with the development of production technology of Pyromelitic Dianhydride (PMDA),PMDA technical process have a higher performance request for PMDA catalyst.Hope Chemical has started research on PMDA production and PMDA process since 1995. In 2003,We developed independently efficient PMDA catalyst. In currently，we have developed different types of catalysts for industry application，just like GHB-1,GHC-1,GHAB-2 double layer. With the properties of high selectivity, high yield and long life , these types of catalyst provide quality guarantee for improving crude PMDA refining efficiency and lower down production cost of PMDA.

HOPE own small test evaluation equipment , single tube pilot evaluation equipment , commercial PMDA production equipment, and advanced detection device, these provide guarantee for research development and production of PMDA catalyst. As a famous bland,Hope catalyst has perfect performance and serviced for most of Chinese PMDA manufacturers.
 

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