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2005年01月18日

【期刊论文】滴流床反应器中发泡流体的流型转变

米镇涛, 刘国柱, 王莅, 王亚权

华工学报,2004,55(5):815~818,-0001,():

-1年11月30日

摘要

Anthraquinone working solutions used in hydrogen peroxide manufacture were selected as the test system to investigate the flow pattern transition behavior of foaming system in the trickle bed reactor (TBR) with the method of measurement and analysis of the instantaneous pressure drop fluctuations. The boundaries and the corresponding flow map for the foaming system were established for TBR packed with different size particles. It was found that the size of particles shows significant effect on the flow regime distributions. A theoretical model proposed by Cheng and Yuan and an empirical correlation by Bartelmus and Janecki were used to predict boundaries of the flow pattern transition for anthraquinone working solutions. Comparison between estimation and experimental results showed that the predicted boundaries of Cheng and Yuan theoretical model are consistent with the observations in the present work.

滴流床反应器, 流型, 发泡流体, 模拟

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2005年01月18日

【期刊论文】铜磷铝分子筛的合成及其对苯液相氧化制苯酚的催化性能

米镇涛, 任永利, 刘国柱, 王莅

催化学报,2004,25(5):357~362,-0001,():

-1年11月30日

摘要

以水热法合成了铜磷铝分子筛(Cu-AIPO4-5),并用XRD,ICP,SEM,FT-IR,NH3-TPD,H2-TPR,ESR和N2吸附脱附等手段对样品进行了表征结果表明,所合成的Cu-AIPO4-5分子筛具有AFI拓扑结构,结晶度高,无结晶态杂质;Cu2+进入到分子筛的骨架结构中,并使其Lewis酸和Brosled酸中心数量增加,弱酸性中心大大增强,强酸性中心消失;样品中的Cu存在多种形式,以骨架Cu物种为主,还存在有骨架外Cuo和双核Cu物种,部分样品具有缺陷结构Cu-AIPO4-5分子筛中存在着骨架Cu和缺陷结构两种可能的活性中心,对苯液相氧化具有良好的催化性能,苯酚选择性可达96%,收率可达6.9%

铜,, 磷铝酸盐,, 分子筛,, 苯,, 过氧化氢,, 液相氧化,, 苯酚

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2005年01月18日

【期刊论文】Experimental Investigation and Simulation of a Gas-Agitated Sieve Plate Column

米镇涛, By Shuxiang Lu, Zhentao Mi, Yaquan Wang, and Li Wang*

Chem. Eng. Technol. 2004, 27, No.8,-0001,():

-1年11月30日

摘要

The extraction of hydrogen peroxide by means of deionized water from anthraquinone working solution via anthraquinone process was carried out in a gas-agitated sieve plate extraction column. The effects of the superficial velocity of air, dispersed phase and continuous phase on the overall plate extraction efficiency have been investigated. The corrections for the prediction of the overall plate extraction efficiency were presented. The correction proposed to predict the overall plate extraction efficiency in the air, water, anthraquinone working solution three-phase system agreed satisfactory with experimental data with a maximum absolute deviation of 5.6%. A new design method for gas-liquid-liquid three-phase extractors is developed based on the multistage countercurrent extraction model. The calculated data by the model agreed well with experimental data and the average relative deviation was less than 10%. Moreover, the model was used to predict a gas-agitated sieve plate extraction column for industrial production of hydrogen peroxide. The results show that the plate numbers of gas-agitated sieve plate extraction column are 30-40% less than that of liquid-liquid sieve plate column.

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2005年01月18日

【期刊论文】INTRINSIC KINETIC STUDY ON THE OXIDATION OF 6-PENTYL-1, 2, 3, 4-TETRAHYDROANTHACENE-9, 10-DIOL

米镇涛, Yongli Ren, Zhentao Mi, Shuying Cheng, Li Wang, and Yaquan Wang*

Akad,-0001,():

-1年11月30日

摘要

A new working solution consisting of 2-pentylanthraquinone (PAQ) and 6-pentyl 1, 2, 3, 4-tetrahydroantraquinone (4HPAQ) was hydrogenated and then oxidized by O2 to produce H2O2. The oxidation reaction was conducted in a well-stirred batch reactor at 30~50℃ and 0.10~0.20MPa. By measuring the concentrations of generated H2O2 by iodometry, the intrinsic kinetics for the gas-liquid oxidation of 6-pentyl-1, 2, 3, 4-tetra-hydroanthacene-9, 10-diol (4HPAQH2, the only hydrogenated product in the hydrogenated working solution) with molecular oxygen were studied. An exponential model was employed to describe the reaction rate and the kinetic parameters were obtained. The results show that the reaction rate is 0.7 and 1.4 order in the concentration of 4HPAQH2 and oxygen pressure, respectively, and the activation energy for oxidation is 41.3kJ/mol.

6-pentyl-1,, 2,, 3,, 4-tetrahydroanthacene-9,, 10-diol,, oxygen,, oxidation,, kinetics,, hydrogen peroxide

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2005年01月18日

【期刊论文】SYNTHESIS OF ACETONE OXIME THROUGH ACETONE AMMOXIMATION OVER TS-1

米镇涛, Xinhua Liang, Zhentao Mi*, Yaquan Wang, Li Wang, and Xiangwen Zhang

Akad,-0001,():

-1年11月30日

摘要

The ammoximation of acetone to acetone oxime with 30wt.% hydrogen peroxide over TS-1 has been studied. The conversion of acetone and the selectivity to acetone oxime can reach 99% and 94%, respectively. The by-products are the corresponding hydrazone, imine and small amounts of unidentified compounds. The influence of various parameters such as solvent, temperature, amounts of catalyst and the NH3 to acetone molar ratio were investigated. Keywords: Acetone oxime, acetone, ammoximation, TS-1, hydrogen peroxide

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    天津大学,天津

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