2 replies to this topic

[chemicalengineerjunior]

Hi all, 

        We have a tank used to store  FCC main bottom product .  The tank contains thick, high viscos & heavy sludge including catalyst fines. Tank is having a diameter of 24 m .

 As the bottom product will be highly viscous tar like substance ( assumption - around 4000 cp ) , its very hard to remove it using vaccum truck, there is a chance of getting solidifying or semi solid state inside the vaccum truck. 

 

My question ..

 

>>>Is there any chemicals we can use to decrease the viscosity of the material ? 

 

if some one have experience please help me 

 

[rilmehta]

Hello 

 

dont know about the solubility part, but is there a possibility of heating in the tank bottom (or steaming) with a jacketed truck to keep it warm enough during transport to avoid solidifying.

 

Rilesh

[shvet]

What about flushing? Did you try to use stright run diesel?