Example Problem: Impurities in polymerization grade Ethylene and propylene.
Ethylene and propylene producers are faced with product concerns. The most common impurities (see Table 1) are monitored both on-line for process control and in the laboratory for product quality.
Calibration and routine validation of these systems are primary issues. All of these chemicals are reactive and/or polar, and do not store reliably as static mixtures in cylinders. This makes it extremely difficult, if not impossible, to know the accuracy of the standards being dispensed by these cylinders.
| Table 1 | ||||
| COS | H2S | Total Sulfurs | Ethylene | |
| Propylene | Arsine | CO | CO2 | |
| Acetylene | Methanol | Other Oxygenates | H2O | |
Solution: KIN-TEK’s FlexStream™ and 491Flex™ Series Laboratory Standards Generator or Span Pac™ I Series Industrial Standards Generator provide calibration standards for all these compounds, using KIN-TEK’s NIST-traceable Trace Source™ disposable or refillable permeation tubes.
Benefits include:
- The standards are generated fresh, eliminating the storage/deterioration problem inherent in gas cyclinders..
- KIN-TEK’s permeation tubes improve the accuracy of the analysis.
- Our instruments easily generate span gases for span checks or multi-point calibrations.
