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.
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。
A route suitable for industrial production of secnidazole was improved, in which boron trifluoride etherate was used in replacing sulfuric acid as the catalyst.
通过比较对塞克硝唑不同的合成路线，选择了一条适合工业化生产塞克硝唑的路线。
A route suitable for industrial production of secnidazole was improved, in which boron trifluoride etherate was used in replacing sulfuric acid as the catalyst.
通过比较对塞克硝唑不同的合成路线，选择了一条适合工业化生产塞克硝唑的路线。
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