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Subject: Distillation tower overhead corrosion

Date: 07/27/02 at 6:21 AM
Posted by: Aatef Irshad
E-mail: aanioz@hotmail.com
Message Posted:

Black particles are being detected in our naphtha circuit of fractionator column. The unit is operational on Heavy crude(sp. gravity 0.890)and light as well(sp.gravity 0.810). The problem becomes more sever when there is a crude chengeover. The pH in tail water is being maintained between 6-6.5, it is disturbed during change over and dissolved Iron is also disturbed ranging around 2-4 ppm. Different filmers and neutralizers have been tried but still no solution to the problem. please do guide us in this regard.

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