The mass fraction of n-butene in mixed C4 from catalytic cracking after etherized was approximately 40%.

混合c 4中含有质量分数约为40%的正丁烯，是生产丙烯的优质原料。

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The mass fraction of n-butene in mixed C4 from catalytic cracking after etherized was approximately 40%.

混合c 4中含有质量分数约为40%的正丁烯，是生产丙烯的优质原料。

youdao