以实践中取得的真实数据，探讨了苯酐催化剂装填的最佳条件、装填的实际操作规程、装填后催化剂科学测试等几方面难题。
Through the analysis of the experimental data, discussed the optimum condition and the practical operating rules of the phthalic anhydride catalyst loading, and the scientific testing after loading.
接下来，通过选用硫脲作为主催化剂，另加入少量的助催化剂，将苯酐废水中的马来酸异构化制取富马酸。
Thiourea was then used as the primary catalyst to making fumaric acid from the waste water of phthalic anhydride.
采用了一种新型的催化剂，以化纤废渣为原料代替苯酐生产醇酸树脂。
An alkyd resin has been developed with chemical fiber waste residue as raw material in replacing of phthalic anhydride at the presence of a new catalyst.
气相氧化法是将空气与汽化后的均四甲苯混合进入含有催化剂的氧化反应器进行氧化反应，反应产物经换热冷却后，均苯四甲酸二酐直接从气相中凝华捕集。
In the method of air phase oxidation the mixed gas that boiling 1,2,4,5-tetramethyl benzene is combined with air is carried into oxidation reactor and reacts and then product gas is cooled.
气相氧化法是将空气与汽化后的均四甲苯混合进入含有催化剂的氧化反应器进行氧化反应，反应产物经换热冷却后，均苯四甲酸二酐直接从气相中凝华捕集。
In the method of air phase oxidation the mixed gas that boiling 1,2,4,5-tetramethyl benzene is combined with air is carried into oxidation reactor and reacts and then product gas is cooled.
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