<prompt> Dzokorora ndima iri pasi apa uye wozopindura mubvunzo unotevera mumutauro mumwechete sechikamu ichi: Passage: Munguva pfupi yapfuura, kambani yemakemikari Showa Denko, iyo yakavhura chirimwa che ethylene oxidation mu Ōita, Japan, muna 1997, yakashambadzira isingadhuri imwe-nhanho shanduko ye ethylene kune acetic acid. Maitiro acho anogadziriswa ne palladium simbi inokonzeresa inotsigirwa pane heteropoly acid senge silicotungstic acid. Maitiro akafanana anoshandisa imwechete simbi inokonzeresa pane silicotungstic acid uye silica: Mubvunzo: Maitiro aya anokonzereswa nei?  <response>: palladium metal catalyst inotsigirwa pane heteropoly acid 