Difference Between Coal Pitch and Petroleum Pitch
Coal pitch and petroleum pitch are two common asphalt materials, and they have obvious differences in terms of **, properties and applications. This article will detail the differences between these two asphalt materials so that readers can better understand and use them.
First, the difference between coal asphalt and petroleum asphalt. Coal pitch is obtained by high temperature dry distillation or incomplete combustion of coal, whereas petroleum pitch is obtained by distillation or cracking of petroleum. Thus, coal bitumen has the properties of coal, whereas petroleum bitumen has the properties of petroleum.
2. Nature. 1.Chemical composition.
Coal pitch and petroleum pitch have different chemical compositions. Coal pitch is mainly composed of polycyclic aromatic hydrocarbons, phenols, hydrocarbons, etc., while petroleum asphalt is mainly composed of saturated hydrocarbons, aromatic hydrocarbons, gums, etc. As a result, the chemical properties of coal pitch are more complex, while petroleum pitch is relatively stable.
2.Physical.
The physical properties of coal pitch and petroleum pitch are also different. Coal pitch is darker in color and is black or dark brown in color, whereas petroleum pitch is lighter in color and brown or black in color. Also, coal bitumen is denser, whereas petroleum bitumen is less dense.
3.Performance characteristics:
Coal pitch and petroleum pitch also differ in terms of performance. Coal pitch has good high temperature resistance and corrosion resistance, while petroleum asphalt has good low temperature performance and oxidation resistance. In addition, coal pitch is cheaper, while petroleum pitch is relatively high.
3. Application. Due to the different properties of coal pitch and petroleum pitch, their range of application is also different. Coal asphalt is mainly used in the manufacture of carbon materials, electrode paste, glass, ceramics, building materials, etc., while petroleum asphalt is mainly used in roads, construction, anti-corrosion and other fields.
In conclusion, there are obvious differences between coal pitch and petroleum pitch in terms of **, properties and applications. When using, the appropriate asphalt material should be selected according to the specific needs and uses.