查询词典 tungstic

The present invention prepares aldehyde or ketone by catalytic oxidation of alcohol under microwave irradiation, which takes sodium tungstate and tungstic heteropolyacid salts as catalyst, takes bidentate ligand containing nitrogen and oxygen as additive and takes hydrogen peroxide as preparing oxidant.

本发明以钨酸钠和钨的杂多酸盐为催化剂，以含氧氮的双齿配体作为助剂，以双氧水为氧化剂，在微波辐照下催化氧化醇制备得醛或酮。

The main products are sodium tungstate, tungstic acid, ammonium perchlorate, tungsten trioxide, industrial ammonium molybdate, sodium molybdate, Chung-ammonium molybdate, ammonium tungsten migraine, two ammonium molybdate, barium molybdate, tungsten electrode wire cutter, cerium Tungsten welding electrode, etc., such as tungsten and molybdenum products.

主要产品有钨酸钠、钨酸、仲钨酸铵、三氧化钨、工业钼酸铵、钼酸钠、仲钼酸铵、偏钨酸铵、二钼酸铵、钼酸钡、钨绞丝电极、铈钨等氩弧焊电极等钨钼系列产品。

The catalyzed oxidation of cyclohexanol with 30% aqueous hydrogen peroxide by mass fraction to produce adipic acid can be achieved using tungstic acid -acidic additive catalyst system in the absence of organic solvents and phase-transfer reagent.

以钨酸-酸性添加剂为催化体系，在无有机溶剂和相转移剂的情况下，催化30%过氧化氢氧化环己醇合成己二酸。

A salt of tungstic acid .

氟硅酸钾、氟硅酸钠和氟铝酸盐。。。

Cyclohexene ; catalytic oxidation ; tungstic acid ; hydrogen peroxide ; adipic acid

环己烯；催化氧化；钨酸；过氧化氢；己二酸

M. McCarron III et al.(1984),4[2W12O38].6H2O, a colorless crystalline compound, was prepared by the reaction of white powdery tungstic acid with an aqueous solution of pyridine.

通过粉状白钨酸与吡啶水溶液反应成功地制备了一种无色的晶体(C5H5NH)4

Phospho-tungstic heteropoly(H3PW12O40) was prepared and its catalytic performance for synthesizing of ethyl hexanoate from hexanoic acid and ethyl alcohol were studied.

结果表明：磷钨杂多酸是合成己酸乙酯的良好催化剂，当酸醇物质的量比为1∶2.0，催化剂用量为0.5 g/0.1 mol己酸，甲苯为8 mL，反应时间为150 min时，酯化率可达97.2

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。