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The catalytic activity was affected by prepared condition through esterification reaction of acetic acid and isobutyl alcohol.

通过沉淀-浸渍法制备一系列S2O82-/ZrO2-SiO2固体超强酸催化剂,用乙酸和异丁醇的酯化反应研究了制备条件对催化剂活性的影响。

Supported solid bases and metal oxide catalysts were prepared successfully by isochoric impregnation and the co-precipitation method, and were used for synthesis of biodiesel from transesterification of rapeseed oil and methanol. The high active solid base catalysts: KF/Al2O3, ZnO/La2O3 and La2O3 were found in this paper.

本文用等体积浸渍法和共沉淀法制备了负载型和金属氧化物型固体碱催化剂,并应用于催化菜籽油与甲醇酯交换合成生物柴油的反应,筛选出了高活性的KF/Al2O3,ZnO/La2O3和La2O3三种固体碱催化剂。

Table 1 Isoelectric point and molecular weight of specific protein of total difficult-dissoved protein before acid treatment.

索盐酸浸渍蚕卵对解除滞育的作用机理对蚕种生产有。重大作用。在蚕卵滞育发生的条件。

The results show that the optimal value of CoCl2 concentration is 0.2 mol/L and the maximum adsorbed amount is 19.674 mg/g onto this adsorbent. The adsorption capacity of phosphine onto CoCl2-modified ACF decreases with the increase of temperatures. The maximum absorbed amounts are 19.674 mg/g at 298 K, 13.537 mg/g at 313 K and 11.087 mg/g at 328 K, respectively. It is found that the Freundlich equation is more suitable for the description of phosphine adsorption process than the Langmuir equation. The isosteric heat of adsorption decreases with the increase of the surface loading on CoCl2-modified ACF, which means that CoCl2-modified ACF adsorbent has an energetically heterogeneous surface. Meanwhile, adsorptive phosphine removal performance may be a dominant of physical adsorption when the heat of adsorption is 16-24 kJ/mol, the CoCl2-modified ACF adsorbent will be one of the candidates for tail gas purification of airtight calcium-carbide furnace and recycle of phosphine.

研究结果表明:浸渍液浓度最佳值为0.2 mol/L,此改性ACF对PH3的饱和吸附量为19.674 mg/g;PH3在CoCl2改性ACF上的吸附量随温度升高而迅速降低,在298,313和328 K时PH3的饱和吸附量分别为19.674,13.537和11.087 mg/g;Freundlich吸附等温方程较好地模拟了PH3在改性ACF上的等温吸附;PH3气体在改性ACF上的等量吸附热随吸附量的增大而减小,表明改性ACF吸附剂表面能量的不均匀性;吸附热在16~24 kJ/mol范围内,过程为物理吸附,有利于密闭电石炉尾气的净化。

Before impregnating nickel, the addition of 3wt% lanthana into Ni/SiO2 could enhance the activity, selectivity and stability of catalyst apparently.

采用先浸渍方式向催化剂中引入含量为3wt%的镧助剂后,镍基催化剂的催化加氢活性、选择性和稳定性得到了很大幅度的提高。

The catalyst prepared by impregnation has good catalytic performance of maleic anhydride hydrogenation to succinic anhydride.

采用浸渍法制备的催化剂,具有较好的顺酐加氢制备琥珀酸酐活性。

Metatitanic acid as precursor, titanium dioxide loading silver grain was prepared by dipping into a stated concentrated silver nitrate solution and using heated-deposition on the surface of the titanium dioxide.

以偏钛酸为前驱体,浸渍一定浓度的硝酸银溶液,用热沉积法制备出载银二氧化钛。

The most effective concentrations of NaOH were 30%, 15% and 25% to dip cotton fibre, microcrystalline and fir powder respectively in the high pressure pot (140℃).

在高压罐(140℃)中分别浸渍棉纤维、微晶纤维素和杉木粉的最佳NaOH溶液浓度分别是30%、15%和25%。

Surface complex supports VSiO, which have good engineering character, and supported Pd/VSiO and Cu/VsiO catalysts have been prepared by surface chemical reaction modification and isovolume impregnation method, respectively. BET, TPR, chemisorption-IR chemisorption-TPD and microreaction techniques have been used to study the adsorption activation and partial oxidation reactivity of CO〓 and C〓H〓 on the Pd/VSiO and Cu/VSiO catalysts.

以表面化学反应改性法制备了工程性质优良的VSiO表面复合物载体,并以等体积浸渍法制备了负载型的Pd/VSiO和Cu/VSiO催化剂;采用BET、TPR、化学吸附—IR、化学吸附—TPD和微反技术研究了Pd/VSiO和Cu/VSiO催化剂对CO〓和乙烷的吸附活化和部分氧化反应性能。

The therapeutic effects were evaluated in the clinical efficacy and mycological culture examina-tion.

目的 观察不同剂型的抗真菌药物治疗夏季水疱型、浸渍型足癣的临床疗效,好地指导临床用药提供实验依据方法 80例临床实验室确诊的足癣患者分4组,分别外用特比萘芬喷雾剂、乳膏,达克宁乳膏、散剂,根据临床疗效及真菌培养判定其效果。

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