正硅酸钠

SBA-15 was synthesized using two different silica sources,sodium metasilicate(Na2SiO3·9H2O) and tetraethyl orthosilicate.

采用两种不同硅源——硅酸钠(Na2SiO3.9H2O)和正硅酸四乙酯合成介孔分子筛SBA-15。

Keywords sodium metasilicate;tetraethyl orthosilicate;SBA-15 zeolite

硅酸钠；正硅酸四乙酯； SBA-15分子筛

Gold nanoparticles were prepared with chemical reduction method and the size was controlled via adjusting the molar ratio of citric acid to chloroauric acid.

采用柠檬酸钠还原氯金酸法制备金溶胶，以正硅酸乙酯为硅源，氨水作催化剂，制备以金为核，二氧化硅为壳的核壳纳米粒子。

The influences of technic conditions of preparation, such as concentration of sodium silicate, concentration of vitriol, reaction temperature and cocurrent time were studied by orthogonal design experiment.

利用正交设计安排实验，采用并流法制备沉淀二氧化硅，研究实验制备工艺条件硅酸钠浓度、硫酸浓度、反应温度和并流时间对沉淀二氧化硅的BET比表面积的影响。

The silica MSU-X type mesoporous molecular sieves were synthesized by using the polyoxyethylene stearyl ether (C18EO10) as template, the tetraethyl orthosilicate and sodium silicates as silica source, respectively.

以十八烷基聚氧乙烯醚(C18EO10)为模板剂，以正硅酸乙酯和硅酸钠分别为硅源，研究了不同pH值、反应温度、反应时间、原料比等条件下，合成的全硅MSU-X型介孔分子筛产物的结构变化规律，并通过焙烧和水热处理，考察了MSU-X介孔材料的结构稳定性。

The experimental result shows that under the condition of lixiviating time being 2.5~3 hours, lixiviating temperature being 110℃, sulphuric acid thickness being 6 mol/L, hydrochloric acid thickness being 3 mol/L, liquid-to-solid quality ratio being 4∶1, the extraction rate of iron will reach 95.7%~96.3% in mass fraction.

丁文武 淮海工学院，连云港 222005通过正交实验研究了用盐酸、硫酸、褐铁矿和硅酸钠制备聚硅氯化硫酸铁絮凝剂的工艺条件。实验结果表明，浸取时间为2.5～3 h，浸取温度为110℃，硫酸浓度为6 mol/L，盐酸浓度为3 mol/L，质量液固比为4∶1，铁的浸出率可达95.7%～96.3%。

Layered sodium silicates was modified by orthogonal test design and the optimal modifying condition was found.

运用正交试验设计对层状硅酸钠进行了改性，确定了最佳的改性条件，并对改性层状硅酸钠进行了表征。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。