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1·Absorption of sulfur trioxide in sulfuric acid.

三氧化硫在硫磺酸里的吸收。

2·A corrosive solution of sulfur trioxide in sulfuric acid.

发烟硫酸含三氧化硫酸的一种腐蚀性溶液。

3·The sulfonation technology of the liquid sulfur trioxide was also reviewed.

对液体三氧化硫磺化技术的特点进行了概述。

4·The research and development of Chinese sulfur trioxide sulfonation technology is reviewed.

对我国三氧化硫磺化技术的研究开发进行了回顾。

5·Advances in applications and technology for sulfonation using sulfur trioxide in manufacturing dye intermediates are reviewed.

综述了三氧化硫磺化在染料中间体生产中的应用和技术进展。

6·The catalyst is characterized by low cost, high catalytic activity and very low activity to oxidize sulfur dioxide to sulfur trioxide.

该催化剂具有成本低，催化活性高，极低的二氧化硫氧化成三氧化硫活性的特点。

7·Secondly molecules of sulfur dioxide are oxidized into sulfur trioxide by those particles, which are including ozone and oxygen plasma.

接着这些高能电子与产生的氧等离子体和臭氧将二氧化硫分子氧化。

8·Sodium gualenate was prepared from guaiazulene by using dioxane sulfur trioxide(D. S. agent ) as sulfonation agent in yield of 71% with 99.5% purity.

以愈创为原料，用二烷· 三氧化硫加合物（D。S。 试剂）作磺化剂合成呱仑酸钠，总收率71% ，产品纯度在99。5 %以上。

9·This paper described the technique of the sulfonation using the liquid sulfur trioxide as a sulfonating agent. The advantages and disadvantages by using this process were pointed out.

叙述了用液体三氧化硫作为磺化助剂的磺化技术，同时，指出了该项技术的优缺点。

10·Pyridine can react with halogens, nitronium fluoroborate, sulfur trioxide, boranes and chromium trioxide to form some useful organic reagents which are introduced briefly in the paper.

吡啶可以和卤素、 硝基四氟化硼盐、 三氧化硫、 硼烷及三氧化铬反应，形成一些有用的有机试剂。