The rate of usage of industrial alkalinity waste residue is bigger than that of purified chemical absorbent.
含有少量杂质的工业碱性废渣的利用率要大于纯化学试剂吸收剂；
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。
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