No abstract

Propylene in a purity degree above 99.5% (polymer purity grade-PPG) is a first-generation basic petrochemical that represents a vital link in refining-petrochemical integration. The strict specification of the product and the need to maximize the energy efficiency of the propylene/propane distillation process poses several challenges to the optimization of both the design and operation of the plant. Using a Petro-SIM (KBC) technology, a polymer grade general model from a propylene distillation unit was developed by means of vapor recompression. The sensitivity for feeding with different propylene fractions was analyzed, reaching a value of 0.94, which is considered the minimum propylene fraction in the feed required to the tower to generate a product with polymer purity grade. Based on the data obtained in the simulation, the tower was designed and evaluated by means of vapor recompression, showing a potential alternative way to obtain propylene at polymer grade which could be cost saving in industrial processes.

This article discusses how with reliable wait list information extracted from the Wait Time Information System, the province, hospital boards, hospitals and clinicians can all make more informed decisions leading to improved access to care. In addition, patients now have information to manage their own care and, through provincial targets, have a sense of how quickly they can and should receive treatment.

No abstract