Difference between toluene and xylene with water

In the chemical industry, toluene and xylene are two common and important organic solvents. They have many similarities in properties and applications, but they also have significant differences. In particular, the performance difference under the condition of "carrying water" is particularly important. This article will analyze the key points of toluene and xylene band water in detail from multiple angles to help readers better understand their characteristics and their differences in practical applications.

1. Physical Properties Comparison

1. Solubility Toluene and xylene are both organic solvents, but there is a significant difference in solubility in water. The solubility of toluene at room temperature is low, and the solubility at high temperature is significantly improved, but the solubility in water is not as high as ethylbenzene or other aromatic solvents. In contrast, the solubility of xylene in water is extremely low and almost negligible, so the stability of xylene is higher under water-carrying conditions.

2. Boiling Point and Vapor Pressure The boiling point of toluene is 110.6 ° C., the vapor pressure is relatively high, and it is easy to evaporate in the environ water, so that the water in the system is more likely to contact with it, resulting in hydration reaction. The boiling point of xylene is higher, 80.1°C, the vapor pressure is lower, and its vapor has a poor affinity for water, so the stability of two is better under the condition of water.

2. chemical differences

1. chemical reaction activity Toluene has high chemical reactivity and is prone to reactions such as addition, reduction and polymerization. Under the condition of water, the reaction activity of toluene may be affected by the hydrolysis reaction, which leads to the inhibition of some chemical reactions. The chemical reaction activity of xylene is low, especially under the condition of water, the chemical reaction is almost negligible.

2. Toxicity and effects on the human body Toluene has a strong toxicity, through a variety of ways to cause harm to the human body. Under the condition of water, the toxicity of toluene may be further enhanced, and the safety requirements for operators and surrounding environment are higher. The toxicity of xylene is low, and has a certain degree of stability, under the condition of water, it is less harmful to the human body.

3. safety and storage conditions

1. Operation safety Toluene is prone to hydration reaction with water under the condition of water, which may generate toxic by-products, so special attention should be paid to protective measures during operation. The xylene almost does not have hydration reaction under the condition of water, and the operation safety is higher.

2. Storage conditions Toluene needs to be stored in a well-ventilated and cool place, away from fire and high temperature equipment. Under the condition of water, the stability of xylene is better, so the storage conditions are relatively loose, and no special anti-humidity measures are needed.

4. process applicability and economy

1. separation and purification Under the condition of water, the physical and chemical properties of xylene are closer to water, so the separation and purification process is easier. Because of its high solubility and hydrolysis reaction, the separation process of toluene is more complicated and the cost is higher.

2. cost of production The production cost of xylene is lower than that of toluene, especially under the condition of water, its stability is higher, and the additional processing cost is reduced. The production cost of toluene is high, and it is easy to cause chemical reactions under the condition of water, which increases the additional processing difficulty.

5. conclusion

The difference between toluene and xylene with water is mainly reflected in the physical properties, chemical properties, safety and economy. Toluene is relatively unstable under the condition of water, which is easy to cause hydration reaction, and the separation and purification process is more complicated and the cost is higher. The xylene has better stability under the condition of belt (with water), safe operation, simple separation and purification process, and low production cost. Therefore, in practical applications, the use of xylene under water conditions is more appropriate, especially in the need of high stability, safe operation of the occasion.