water-soluble catalyst

The results are as follows: ( 1) Microspheres SiO2 were prepared by hydrolysis of tetraethoxy silane ( TEOS) in alcohol-water mixed solvents using ammonia as catalyst.

研究结果如下：（1）利用St（o¨）ber法，以醇为溶剂，正硅酸乙酯在氨水催化下水解、缩聚，并进行一系列的后处理得到SiO2微球。

The liquid-phase dehydration of tert-butyl alcohol to isobutene and water was researched in a reactive distillation column with a catalyst-bed filled with cation exchange resin S-54 in pellet form.

采用柱状阳离子交换树脂S54作催化剂研究了叔丁醇脱水的反应精馏过程。

Preparation of tertiary amyl alcohol from hydration of isoamylene enriched C 5 fraction was carried in the laboratory. The effects of catalyst, reaction temperature, pressure, space velocity and water/ isoamylene ratio were investigated.

在实验室研究了从富含异戊烯的C5馏分水合制备叔戊醇的工艺，考察了催化剂、反应温度、压力、空速、水与异戊烯摩尔比等因素对水合反应的影响。

Synthesis of adamantane using AlCl_3-trace water catalyst system by two steps

AlCl3-微量水催化体系两步法合成金刚烷

If the water for making tea is too hot, tea leaves will be spoiled and tea liquor will turn to dark yellow very quickly. ( 2) Initial temperature of catalyst bed is wholly too high.

泡茶时，如果使用水的温度过高，会使茶叶泡熟，茶汤很快变黄。（2）提高起始反应温度使催化剂床层温度整体过高导致飞温。