查询词典 cumene

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。

In order to enhance heat transfer efficiency of reboiler which is widely used in petroleum and chemical system, phase change heat transfer and friction characteristics in several heat transfer enhancement tubes are studied, With a view to approach practical circumstances, cumene is chosen as organic working medium.

为了提高石化系统再沸器的传热效率，本文研究了几种强化沸腾与冷凝管的传热与阻力特性。为接近实际条件，选用异丙苯为工质。

Compared with the corresponding mesoporous molecular sieve, SBU-MCM-41 showed higher above 68% catalytic activity for cumene cracking and exhibited better hydrothermal stability.

与相应的中孔分子筛相比，SBU-MCM-41的酸性增强，异丙苯裂解反应活性提高了68％以上，并且水热稳定性也有一定程度的改善。

The typical industrial technology of producing phenol was cumene process containing four steps: alkylation,oxidation,purification and recovering.

异丙苯法是苯酚、丙酮的代表性工业制备方法，主要由烃化、氧化、精制、回收四个工序组成。

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。

Methods: We used cumene hydroperoxide as an inducer of lipid peroxidation to induce the culture ECs lipid peroxidative action and to prepare endothelial cell conditional medium, and then we added it to the merged VSMCs as an experiment factor.

以氢过氧化枯烯为诱发剂引发培养的血管EC的脂质过氧化反应，将制备的内皮细胞条件培养液作为实验因素作用于培养的VSMC。

Ltd. The results show that in contrast to phosphoric acid catalyst, the production of cumene on zeolite catalyst exhibits low operating cost, high product yields, high product purity and little corrosion.

结果表明，采用沸石分子筛催化剂生产异丙苯，与固体磷酸催化剂相比，具有收率高、产品质量好、操作费用低、无腐蚀等优点。

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%。

two step route, mesoporous material, cumene, catalysis

本研究中，我们以在第一步得到的聚合的Al O

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

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。