Optimum separator pressure: defined

In those cases where the isotherms are not available, something can still be done to begin to approach the optimum. In this case, experimental data of reasonably good quality is needed. The separation is defined by the required annual production, the purity required for the product, the cost of the crude product (which is not always well known, but estimates are usually available) and the operating pressure of the equipment. As noted above, this pressure is not necessarily the maximum available from the pump since many other factors may be involved. In practice, the dimensions of available columns is also a factor which must be used as a constraint in the calculations. 

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