The preferred feedstock for production of Carbon Blacks are heavy oils. The most suitable oils are distillates from coal tar or residual oils that are created by catalytic cracking of mineral oil fractions, and olefins manufactured by the thermal cracking of naphtha or gasoil (petrochemical oil).
The quality is the main criteria for deciding in favor of a specific feedstock. Important properties are:
- Distillate residue
- Carbon/hydrogen ratio
- Asphaltene content
- Specified impurities
- Thermal and electrical conductivity
Additional quality requirements involve impurities from foreign matter such as alkaline metals or sulfur content.