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首页> 外文期刊>Catalysis Communications >Enhancement effect of organic additives on liquid-phase production of epsilon-caprolactam
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Enhancement effect of organic additives on liquid-phase production of epsilon-caprolactam

机译：有机添加剂对ε-己内酰胺液相生产的促进作用

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摘要

The effect of various organic additives on the catalytic performance of zeolites and Al-containing MCM-41 in the liquid-phase Beck-mann rearrangement of cyclohexanone oxime was investigated at 130 deg C using benzonitrile as solvent.Over USY zeolite with a large amount of extraframework aluminum(EFAL),the lactam yield was dramatically improved,up to 82%,by adding ethanol,dimethyl sulfoxide,ammonia,diethylamine,or pyridine to the oxime solution.It is due to a selective adsorption of these additives on the detrimental hydrolysis sites as suggested by FTIR results.On the other hand,the additives enhanced both the oxime conversion and the lactam yield through a promotion of the desorption of lactam product from acid sites when beta zeolite and Al-MCM-41 with relatively low EFAL content were used as catalysts.
机译：以苯甲腈为溶剂，在130℃下研究了各种有机添加剂对沸石和含铝MCM-41在环己酮肟液相贝克曼重排中催化性能的影响。通过在肟溶液中加入乙醇，二甲亚砜，氨气，二乙胺或吡啶，将内酰胺铝（EFAL）的内酰胺收率大大提高，最高可达82％。这是由于这些添加剂对有害水解的选择性吸附所致。另一方面，当β沸石和EFAL含量相对较低的Al-MCM-41含量较高时，这些添加剂通过促进内酰胺产物从酸性位置的解吸作用而提高了肟的转化率和内酰胺产率。用作催化剂。

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