We said before that it was wrong to return the effluent from a oncethrough reboiler with a vertical baffle to the cold side of the…
At a Gulf Coast refinery, the reboiler thermosyphon circulation could not be reestablished after a turnaround. The tower was reopened and a lessthan-alive contract employee…
This is perhaps an idea you remember from high school, but never quite understood. The phase rule corresponds to determining how many independent variables we…
There are several common causes of loss of circulation. The common symptoms of this problem are • Inability to achieve normal reboiler duty. • Low…
If you have read this far, and understood what you have read, you will readily understand the following calculation. It is simply a repetition, with…
The tray temperatures in our preflash tower, shown in Fig. 6.4, drop as the gas flows up the tower. Most of the reduced sensible-heat content…
We stated that the top edge of the outlet weir is maintained about 0.5 in above the bottom edge of the inlet downcomer to prevent…
When we raise the top reflux rate to our preflash tower, the tower-top temperature goes down. This is a sign that we are washing out…
Application: Process to produce white oils and waxes. Feeds: Nonrefined as well as solvent- or hydrogen-refined naphthenic or paraffinic vacuum distillates or deoiled waxes. Products:…
Application: Hydrogen finishing technology has largely replaced clay treatment of low-oil-content waxes to produce food- and medicinalgrade product specifications (color, UV absorbency and sulfur) in…