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[Chemical Knowledge]：Coal tar (high temperature) manufacturing method and process

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The manufacturing method
of coal tar (high temperature)
1. Introduction

Coal tar is an important raw material for the production of chemical products, widely used in medicine, pesticides, dyes, synthetic materials and other fields. Making coal tar at high temperature can improve its quality and output and meet different production needs. This article will introduce the manufacturing method of coal tar (high temperature), including raw material preparation, high temperature cracking, condensation separation and purification steps.

2. raw material preparation

manufacturing coal tar is the main raw material of coal, generally choose low metamorphic degree of bituminous coal or anthracite. Raw coal needs to go through crushing, screening, drying and other processes to ensure that its particle size and moisture content meet production requirements. At the same time, it is necessary to test the quality of raw coal to determine its volatile, ash, sulfur and other indicators to ensure the quality of coal tar.

3. high-temperature cracking

high-temperature cracking is a key step in the manufacture of coal tar, the raw material coal needs to be heated to a certain temperature, so that it can be pyrolyzed under anoxic conditions. This process is generally carried out in a tube furnace or a fluidized bed reactor, and the temperature is controlled between 700 and 900°C. At high temperatures, the organic matter in the coal decomposes to generate volatile and fixed carbon, where the volatile matter is condensed to obtain coal tar.

4. condensation separation

high temperature cracking of volatile matter need to be separated by condensation, coal tar and gas, water and so on. Generally, a cooler and a condenser are used for condensation and separation to cool the volatile to a certain temperature, so that the coal tar is condensed into a liquid, and the gas and moisture are discharged from the system. In order to ensure the quality of coal tar, it is necessary to strictly control the condensation and separation process to prevent moisture and impurities from entering the coal tar.

5. Refining and purifying

The coal tar obtained by condensation and separation also contains some impurities and moisture, and needs to be refined and purified to improve its purity. Generally, distillation, extraction, crystallization and other chemical unit operations are used for refining and purification to remove impurities and moisture in coal tar to obtain high-quality coal tar products. In the process of refining and purifying, it is necessary to select appropriate process conditions and operating parameters according to the composition and properties of coal tar to ensure product quality and production efficiency.

6. safety and environmental protection measures

In the coal tar manufacturing process, it is necessary to pay attention to safety and environmental protection measures to ensure that the production process complies with relevant regulations and standards. First of all, it is necessary to establish a sound safety management system and operating procedures, strengthen staff safety training and education, and improve safety awareness. Secondly, it is necessary to strengthen equipment maintenance and overhaul to ensure the normal operation of the equipment and prevent accidents. At the same time, it is also necessary to strengthen the treatment and emission control of pollutants such as waste gas and waste water to protect the environment.

7. conclusion The manufacturing method of

coal tar (high temperature) includes the steps of raw material preparation, high temperature cracking, condensation separation and purification, and it is necessary to strictly control the process conditions and operating parameters to ensure product quality and production efficiency. At the same time, safety and environmental protection measures need to be strengthened to ensure that the production process complies with relevant regulations and standards. By mastering the coal tar manufacturing method, it can provide important raw material guarantee for chemical production and promote industrial development.

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