pulse-type ionization chamber

here is an explanation for the principles and characteristics of measuring the content of sulfide or sulfur trioxide ( so3) in cement.

阐述了测定水泥中三氧化硫含量各种方法的原理、特点等。

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on the method of rapid determination of sulfur trioxide in cement

水泥中三氧化硫的快速测定法

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the method and the technology of synthesizing heavy aromatic petroleum sulfonate by heavy aromatic hydrocarbon and sulfur trioxide and the properties of synthesized product are studied in this paper.

本文研究了采用重芳烃和三氧化硫为原料合成重芳烃石油磺酸盐的方法、工艺及产物性质。

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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.

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the maximum methane conversion of 48.5% and methanol yield of 41.5% were obtained under the conditions of 7.0 mmol catalyst, methane pressure of 3.5 mpa, reaction temperature of 473 k, reaction time of 3 h, and 50% sulfur trioxide concentration.

在工艺条件为催化剂用量7·0mmol，反应温度473K，反应压力3·5MPa，反应时间3h和发烟硫酸中SO3含量50%时，甲烷转化率可达48·5%，目的产物甲醇收率为41·5%。

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The title product is prepared by reacting sulfur trioxide with methyl ether.

其制备方法是由三氧化硫与甲醚反应生成硫酸二甲酯.

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the optimum conditions for synthesizing sodium cyclamate by using sulfur trioxide dioxane as sulfonating agent were investigated. the yield of sodium cyclamate is around 94.8% and the purity is more than 98.2%.

以三氧化硫·二氧六环作磺化剂合成甜味素，取得了最佳工艺条件，总收率可达94.8%，产品纯度在98.2%以上。

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A corrosive solution of sulfur trioxide in sulfuric acid.

稀释的硫酸,用于蓄电池.

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study on reaction conditions of toluene sulfonation with gaseous sulfur trioxide

三氧化硫磺化甲苯反应的工艺条件研究

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p-nitrotoluene was sulfonated by sulfur trioxide to produce p-nitrotoluene-2-sulfonic acid. the factors which influence the reaction were studied, the purity of the product is above 98%, and the yield is above 96%.

以对硝基甲苯为原料，经三氧化硫磺化合成了对硝基甲苯邻磺酸，研究了影响反应的因素，主产品含量可达98%以上，收率达96%。

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It is feasible that fuming acid sulfonating technology is substituted by sulfur trioxide sulfonating technology.

用三氧化硫磺化工艺替代发烟硫酸磺化工艺是可行的.

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research on the application of liquid sulfur trioxide

液体三氧化硫应用问题的探讨

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Reduces coking and atomic oxygen thus lowering sulfur trioxide formation.

降低烟尘及氧原子,减少三氧化硫的排放.

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the high-speed analysis on sulfur trioxide in glass

玻璃中三氧化硫的特快分析

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this article outlines the physical and chemical property, production process, product quality standard, process parameter control and operational requirements, etc., for liquid sulfur trioxide, and discusses the technical decisions for the liquid sulfur trioxide plant.

阐述了液体三氧化硫的物化性质、生产工艺、产品质量标准、工艺参数控制及操作要求等，并对液体三氧化硫装置的技术决策进行了探讨。

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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。

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Production of ferrous powder by oxidative roast of copperas, a byproduct of titanium pigment was introduced, and optimum process for the transformation of sulfur to sulfur trioxide was studied. Preparation of ( NH_4)_2SO_4 and Red Fe_2O_3 from Side Product of Making TiO_2 Powder

介绍了以硫酸法钛白粉副产物绿矾为原料，氧化焙烧生产铁红粉，并研究了氧化反应中硫转化为三氧化硫的适宜工艺条件。钛白粉副产物硫酸亚铁生产硫酸铵和氧化铁红的研究

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the preheated system of sulfonation of sulfur trioxide

三氧化硫磺化预热系统国产化

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by film sulfonation with sulfur trioxide, aromatic hydrocarbon of distillate cut oil was sulfonated, and then neutralized, extracted and concentrated to form petroleum sulfonate for the tertiary oil recovery.

采用SO＿3膜式磺化技术，磺化了石油馏分油中的芳烃，磺化产物经中和、萃取和浓缩处理，以制得符合油田三次采油要求的石油磺酸盐产品。

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study of stabilizers for liquid sulfur trioxide

液体三氧化硫稳定剂的研究

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high-speed determination of sulfur trioxide in glass and cement

玻璃和水泥中三氧化硫的高速分析

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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。

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summary of sulfur trioxide sulfonation model

三氧化硫磺化模型综述

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it is feasible that fuming sulfuric acid sulfonating technology is substituted by sulfur trioxide sulfonating technology.

用三氧化硫磺化工艺替代发烟硫酸磺化工艺是可行的。

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determination of liquid-phase sulfur trioxide in wpa slurry by icp-aes

ICP-AES测定湿法磷酸萃取料浆中液相三氧化硫含量

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application of sulfur trioxide sulfonating technology to dsd acid production

三氧化硫磺化工艺用于DSD酸生产

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production process for liquid sulfur trioxide

液体三氧化硫的生产工艺

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the adsorption indicator method to determine rapidly sulfur trioxide in salt cake

吸附指示剂法快速测定芒硝中三氧化硫

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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。

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the partial oxidation of methane by the h_5pv_2mo_ 10 o_ 40 catalyst in oleum was studied. the effects of catalyst amount, reaction temperature, reaction time, and sulfur trioxide concentration on the methane conversion and methanol yield were investigated.

以H5PV2Mo10O40为催化剂，在发烟硫酸中进行了甲烷液相部分氧化，考察了催化剂用量、反应温度、反应时间和发烟硫酸浓度等工艺条件对反应收率的影响。

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