The procedures of producing bitumen are as follows:
1.Continuous blowing procedure
2.Discontinuous blowing procedure
These two procedures are done by other two procedures named catalysis and anticatalysis .
Catalysis means adding some chemical material during the process In order to decrease blowing reaction time.
For the following reasons:
• Ease and simplicity in changing blowing condition and have production with different grades as a result.
• Ease in generating the unit.
• Ease in technology and also low expense in investment. The discontinuous producing procedure is chosen.