I am urgently looking for any advice on what the accepted methods for determining NOx's are in ethylene and propylene entering cryogenic units. I am sure that anyone who owns such units is aware of the explosive hazard cause by NOx gums and NOx salts. I have two questions:
What operation...
Hello,
Can anyone who has experience in Benfield units please tell me what sort of levels of potassium salts (aka PBS)are acceptable in the solution of the Hot Potash process? What are the typical levels experienced in these units and do they adversely affect your operations? If so, at what...
We have a big fouling problem on one of our acid gas strippers. It works on an ammonium carbonate system to remove CO2 and H2S. The make-up water for the tower however has a high silica content and now we sit with a cemented stack of rings which we cannot unpack. The stuff is high in Si, Fe...
All,
I wish to take issue with someone about the popular theory that hydrocarbons cause foaming and to find out why. I have read quite a bit on the subject esp. in Ullman's Encyclopaedia of Industrial Chemistry. I have come to the conclusion that there are two general kinds of foam causes, viz...
Are there critical values for density and viscosity for which it may become difficult for a Benfield or related process to operate, if it is exceeded? If so, where can I obtain an index for such values?
Regards,
JohnCalvin@Geneva
We have a Benfield process to remove CO2 from an LPG stream before it goes to a cryo unit. Currently we experience foaming problems and the dosage of antifoams is necessary. My question is two-fold: 1) is there an upper concentration limit above which it becomes simply ridiculous to dose any...
