Coal pitch is a complex mixture of organic compounds, and its main chemical properties include:
1.Hydrocarbon composition: Coal pitch is mainly composed of polycyclic aromatic hydrocarbons, phenols, alcohols, ketones and esters. Among them, polycyclic aromatic hydrocarbons are the main components of coal pitch, and the content is usually more than 50%.
Elemental composition: Coal pitch is composed of elements such as carbon, hydrogen, oxygen, sulfur and nitrogen. Among them, carbon and hydrogen are the main elements, and the content of sulfur and nitrogen is relatively low.
Viscosity: Coal pitch has a higher viscosity and gradually decreases as the temperature increases. The viscosity of coal pitch is affected by its chemical composition and molecular structure.
4.Corrosiveness: Coal pitch has a certain corrosiveness and can corrode metallic and non-metallic materials.
5.Flammability: Coal pitch is a flammable substance, and harmful gases such as carbon monoxide and carbon dioxide produced by its combustion are harmful to the human body and the environment.
6.Stability: Coal pitch is relatively stable at room temperature, but it is prone to decomposition and aging under high temperature and light conditions.
These chemical properties determine the use and application range of coal asphalt, and also provide guidance on the issues that need to be paid attention to in the process of production and use.