发烟硫酸含三氧化硫酸的一种腐蚀性溶液。
发烟硫酸活性高，有助于提高磺化物的磺 化度。
The high activity of the oleums is helpful for enhancing the sulfonation degree of the sulfonated bodies.
以大庆黑帝庙稠油为原料，发烟硫酸为磺化剂，合成了稠油磺酸盐。
A new surfactant heavy crude oil sulfonates (HCOS) was synthesized from Daqing Heidimiao oil with fuming sulfuric acid.
经过多次试用，其操作时间和得到的结果，与以前使用的硫酸、硝酸加发烟硫酸的方法基本相同。
This method has been used for many times and similar operation time and product are obtained as that using the treatment with a mixture of sulfuric acid, nitric acid and fuming sulfuric acid.
巴陵分公司一座发烟硫酸储罐于1997年投用，三年多来在罐顶、焊缝及罐壁部位多次穿孔泄漏。
A fuming sulfuric acid tank commissioned in 1997 in Baling Petrochemical Company have experienced a number leakages at the top of the tank, welds and wall shell.
以废聚苯乙烯（WPS）泡沫为原料，采用浓硫酸和发烟硫酸两种磺化方法制备性能良好的砼减水剂。
The PS water reducing agent, which is very effective for concrete, has been made from waste poly styrene(WPS) by sulfuric acid of fuming sulfuric acid sulfonation process.
以发烟硫酸-高氯酸为催化剂，通过四氢呋喃的阳离子开环聚合合成了窄分子量分布的聚四氢呋喃(PTHF)。
Polytetrahydrofuran (PTHF) with narrow molecular mass distribution was prepared by cationic ring-opening polymerization of tetrahydrofuran using H_2SO_4 · SO_3-HClO_4 system as a catalyst.
本方法中发烟硫酸与双氧水反应相对提高了双氧水的浓度，提高了双氧水的氧化能力，降低了双氧水的分解速度；
In the method, the reaction of the oleum and the oxyful relatively improves the concentration and the oxidization capability of the oxyful and reduces the decomposition speed of the oxyful;
本方法中发烟硫酸与双氧水反应相对提高了双氧水的浓度，提高了双氧水的氧化能力，降低了双氧水的分解速度；
In the method, the reaction of the oleum and the oxyful relatively improves the concentration and the oxidization capability of the oxyful and reduces the decomposition speed of the oxyful;
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