Propane Dehydrogenation (PDH) to Propylene

Client：A listed refining and chemical company

Daily Treatment Capacity：500m³

Source of Treatment Solution：

Propane Dehydrogenation (PDH) is an essential chemical process that converts propane into propylene using a catalytic reaction.During operation, the catalyst gradually becomes deactivated as it is encapsulated by by-products formed in the reaction.To restore catalytic activity and maintain pore structure, steam purging is performed to remove these deposits.
The desorbed by-products — including unreacted heavy hydrocarbons, oligomers, and carbonaceous residues — are carried into the condensation system along with the steam.
As the temperature decreases, these substances condense and mix with cooling water, forming a stable oil–water emulsion.
The resulting oily wastewater is characterized by high oil concentration, strong emulsification, and fluctuating oil content, making it extremely difficult to treat using conventional separation methods.
The CASAIS Aggregation-Induced Separation process provides an effective, reliable, and fully physical solution to separate and recover oil from such challenging emulsified wastewater.

Process Comparison

Treatment Effect

Inlet and outlet water effect	Process operation sampling inspection record