The preparation and field-test of the 778-type granular rare-earth catalyst for the treatment of auto exhaust gases have been studied.
本文叙述了778型颗粒状汽车尾气净化稀土催化剂的研究和应用。
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Dibutyl oxalate was synthesized with oxalic acid and n-butanol as raw materials and p-toluene sulphonic acid supported on granular active carbon as the catalyst.