钨酸
- 与 钨酸 相关的网络例句 [注:此内容来源于网络,仅供参考]
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The experiment indicates: on condition that the mole ratio is 1.1:1, temperature is 90~98℃, pH is 1~2, acid adding speed is 1 drop/(2~3) second, the yield and quality of the products can get increased when reaction liquid disposed with ultrasound wave.
实验表明:在硅酸钠与钨酸钠的物质的量比为1.1:1,控温90~98℃,pH值1~2,加酸速率1滴/(2~3)s的优化条件下,用超声波处理反应液可以增加产品的产量和质量。
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Optical materials ; PbWO_4 crystal ; optical properties ; electronic structure ; raspite structure
光学材料;钨酸铅晶体;光学性质;电子结构;斜钨矿结构
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A series of SiW_(12)/AC catalysts with different silicotungstic acid loadings supported on acti- vated carbon which was treated with 10% HNO_3 solution were prepared by an impregnation method and the catalytic performance of SiW_(12)/AC for the synthesis of trioxane were investigated.
以10%硝酸溶液处理过的活性炭为载体,采用不同质量分数的硅钨酸SiW_(12溶液为浸渍液,制备了不同负载量的SiW_(12)/AC催化剂,考察了催化剂在合成三聚甲醛中的催化性能,并用XRD、FT-IR、NH_3- TPD、BET、TG-DSC等手段对SiW_(12)/AC催化剂晶粒大小、催化剂表面的酸量及酸强度、比表面积及热稳定性等微观特性进行了表征。
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Monodispersed tungstic acid nanoparticles with an average diameter of 20 nm were prepared by a ultra-violet light irradiation of oxotungsten-citrate complex aqueous solution.
通过紫外光照射柠檬酸钨氧配合物水溶液,制备了平均粒径约为20nm的单分散钨酸纳米颗粒。
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If the tungstic acid alone was used a...
钨酸-磺酸水杨酸催化体系重复使用五次后,己二酸分离产率仍可达到 80.5%。
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As catalyst, the tungstosilicic and phosphato-tungstic acids have similar catalytic activities which are six times more than that of sulfuric acid in the same reactive conditions.
钨硅酸和磷钨酸具有相似的活性活性,在同样条件下,其速度常数均为硫酸的六倍,其选择性为硫酸的3倍。
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In this paper tungstosilicic triethanolamine salt and tungstophoric triethanolamine salt were prepared and used as catalysts in the synthesis of n-butyl lactate ,The synthetic conditions with tungstosilicic triethanolamine salt as catalyst were also examined.
合成了硅钨三乙醇胺盐和磷钨酸三乙醇胺盐,并以它们为催化剂,合成了乳酸正丁酯。
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The present invention is characterized in that the ammonium metatungstate powders and the cobltic-nitrate powders are respectively dissolved in the water and scattered in the liquid nitrogen to be pre-frozen using a nitrogen spray gun after being mixed and defecated, and then are placed in a freezedryer to be dried vacuumly and finally the powders are obtained. The nanometer powder i.e. the nano tungsten-cobalt composite powder is obtained by reducing the freeze-dried mixed powder in the atmosphere of hydrogen.
该微晶硬质合金的制备方法特征为:将偏钨酸铵粉末与硝酸高钴粉末分别溶于水中,混合澄清后使用氮气喷枪,将其分散在液氮中预冻后置于冻干机中进行真空干燥得到粉末;在氢气气氛中对冻干的混合粉末进行还原得到纳米粉体,即钨钴纳米复合粉体。
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According to the experimental data, it is indicated that molybdenum acts as the catalyst, which exists in a much mo...
我们曾用此法在不分离钨的条件下,测定了钨酸钠中微量的钼。
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Dibutyl maleate was prepared from maleic anhydrideand n- butyl alcohol in the presence of tungstophosphoric acid or molybdophosphoric acid .
用顺丁烯二酸酐和正丁醇为原料,分别以磷钨酸和磷钼酸为催化剂,合成了顺丁烯二酸二丁酯。
- 推荐网络例句
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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。
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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。
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When I was in school, the rabbi explained everythingin the Bible two different ways.
当我上学的时候,老师解释《圣经》用两种不同的方法。