查询词典 catalyst

The conversion temperature of amorphous silica to α-cristobalite decreases from 1470℃ to 700℃ in the presence of Na〓WO〓, and the conversion is accompanied by the great decrease in the surface area of the catalyst.

在有Na〓WO〓存在的条件下，无定形SiO〓转化为α-方石英的温度从1470℃下降到700℃，这种转化同时伴随着催化剂比表面积的急剧下降。

Cryptomeria japonnica was liquefied in polyethylene glycol/glycerol co-solvent with H2SO4 and HCl as a catalyst.

本研究以聚乙二醇／丙三醇为混合溶剂，硫酸及盐酸为催化剂，对柳杉木材Cryptomeria japonnica D。

Application of zeolite catalyst in cumene process makes it possible to achieve better quality without pollution.

而在合成异丙苯阶段使用沸石分子筛为催化剂，具有收率高、产品质量好、操作费用低、无腐蚀等优点。

The zeolite catalyst process can be applied in the revamping of cumene unit.

沸石分子筛催化剂及其工艺用于吉化股份有限公司染料厂原异丙苯单元的技术改造是完全可行的。

For ethylbenzene and cumene oxidations, it was observed that small amounts of mild-strong acid sites in catalyst could inhibit the reaction.

对烷基芳烃的研究结果显示，分子筛催化剂中少量的中强酸性即可对氧化反应产生强烈阻止作用。

The epoxidation of propylene to propylene oxide, using cumene hydroperoxide as oxidant, molybdenum-glycol complex as catalyst and ethanol as solvent, has been investigated.

研究了以钼－醇配合物为催化剂，过氧化氢异丙苯为环氧化剂，乙醇为溶剂的丙烯一步氧化制环氧丙烷的反应。

At the end of the 1990s, there is breakthrough progress in the phenol-acetone process of the world. Especially development of molecule sieve catalyst for cumene is not only of progress of the technique ,but also possibility of clean-production, Also, sythesization and purification of phenol-acetone have been get improvement largely.

九十年代末，世界苯酚丙酮生产技术有了突破性的进展，尤其是分子筛催化剂合成异丙苯技术的开发，不仅是技术的飞跃，而且实现了清洁生产；加之苯酚丙酮合成与精制技术也在不断改进，使装置产品产率和质量进一步提高，物耗能耗大幅度下降。

Employing dealkylation of cumene as the controlling reaction, the authors investigated the poisoning action of pyridine on a silica-alumina catalyst.

本文以异丙基苯的裂化作为控制反应，用动力学方法考察了硅铝催化剂为吡啶中毒的情况。

And taking the alkylation of propylene with benzene to produce cumene as model reaction , the reaction performance of HP zeolite catalyst was also evaluated by means of the semi-continuous gas-liquid reactor and liquid-liquid continuous reactor.

结果表明：催化剂强度随成型过程中醋酸用量的增加呈现先增大后减小的趋势，最高催化剂强度对应的醋酸用量为6%。

Cumene hydroperoxide ; resin ; decomposition ; phenol ; acetone ; catalyst

过氧化氢异丙苯；树脂；分解反应；苯酚；丙酮；催化剂

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷