With the continuous deepening of modern industrial production, the actual demand for different types of chemical gas raw materials in the industry is increasing, especially for some gas products with special purposes, the same is true, and hexafluorohydrogen sulfide gas It is one of the more representative ones. So, what is the performance status of this hydrogen sulfide gas? What are the common preparation methods?
According to the gas preparation experts of professional hydrogen sulfide manufacturers in the region, it is very important for the majority of manufacturers to fully understand the performance and actual effect of hydrogen sulfide gas. It will not only help users grasp the correct product use, but also Ensure the safety of industrial production.
From a professional point of view, the basic physical and chemical properties of sulfur hexafluoride in practical applications include:
Sulfur hexafluoride is a colorless, odorless, non-toxic, non-flammable and non-corrosive gas at normal temperature and pressure. The gas density is 61139g/L, and its chemical stability is strong. It does not decompose at 500-600℃, and is acidic. , Alkali, salt, ammonia, water, etc. do not react, and decompose into atomic gas of S and F under the action of arc (thousands of degrees), but once the arc is released, it will recombine into SF6 within 0-5～10-6s.
And because sulfur hexafluoride has good electrical insulation properties and excellent arc extinguishing performance, its electrical strength is 215 times that of nitrogen under the same pressure, its breakdown voltage is 215 times that of air, and its arc extinguishing capacity is 100 times that of air. , Is a new generation of ultra-high insulation dielectric material superior to air and oil.
In practical applications, sulfur hexafluoride is chemically stable. Slightly soluble in water, alcohol and ether, soluble in potassium hydroxide. Does not react chemically with sodium hydroxide, liquid ammonia, hydrochloric acid and water. It does not react with copper, silver, iron, and aluminum in a dry environment below 300°C. Below 500℃, it has no effect on quartz. It reacts with metallic sodium at 250°C, and reacts in liquid ammonia at -64°C. It will be decomposed when mixed with hydrogen sulfide and heated. At 200℃, in the presence of certain metals such as steel and silicon steel, it can promote its slow decomposition.
Regarding the production and preparation methods of hydrogen sulfide gas, manufacturers usually do it in the following ways:
Industrial hexafluorohydrogen sulfide is usually produced by the reaction of fluorine produced by electrolysis with sulfur at medium and high temperatures. In addition to sulfur hexafluoride, a small amount of by-products such as sulfur tetrafluoride (SF4) is also generated. The method of directly synthesizing sulfur hexafluoride from fluorine sulfur can be divided into three methods: fluorine gas and solid sulfur, molten sulfur, and sulfur vapor.
The fluorine gas reacts with solid sulfur. Because the fluorine-sulfur reaction is a very intense exothermic reaction, the reaction temperature is not easy to control, resulting in increased by-products and increased post-processing burden. In addition, it is difficult to continuously add solid sulfur to a sealed reactor, so this method is not suitable for industrial production.
The reaction between fluorine gas and sulfur vapor is to heat the sulfur to above 445°C (boiling point), so that the sulfur becomes vapor and is sent to the reactor to react with fluorine. There is also the defect that the reaction temperature is difficult to control, and the reaction temperature can reach 600 Above ℃, special reactor materials must be used, and this method is also not suitable for industrial production. The reaction between fluorine gas and molten sulfur is to keep the sulfur in the reactor in a molten state at 85-105°C to react with the fluorine gas that is passed in. This method is easier to control the reaction temperature.
Zibo Shuncheng Chemical Co., Ltd. is a regional professional organization specializing in hydrogen sulfide sales and research and development. The company has very rich experience in professional storage and supply of different types of hydrogen sulfide gas products, so its products are of high quality, performance and practical utility. It is very prominent, and it is well received by the large demand manufacturers and self-employed in the region. It is because of this that the company can become a more reliable hydrogen sulfide manufacturer in the region.
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