Issues regarding the sedimentation of catalysts used in the loop reactor process for polypropylene production
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In the production of polypropylene using the loop reactor method, the catalyst in D201 became clogged multiple times; the cause is unknown. Catalyst sedimentation is suspected. After emptying D106 and reconfiguring the system, the problem persisted.
Is it blocked at the D201 exit? This situation is usually caused by a problem with the catalyst; it’s not necessarily due to sedimentation. It’s possible that the catalyst itself contains impurities. Check the D106 filter, the outlet filter at D108, or perform a backwash at the inlet of D201 to see if there are any particulate impurities present
Is there a problem with the viscosity of the white oil?
The cooling effect of D108 and the catalyst lines needs to be checked; there is no cryogenic water flow in the jacket of our cooling lines here. Check the pH value of the chilled water; it should not be acidic, otherwise a corrosion inhibitor needs to be added.
What catalyst is used, white oil and fats? Which location is blocked? Even if there is settlement, the high pressure in D201 prevents blockage; is this caused by fluctuations in the propylene flow rate?
For Shanghai Clariant polypropylene catalysts, contact WX13913299263