Introduction GUIDED WAVE’S ClearView ® db analyzers combined with robust gas sample sys- tems can be used in ethylene dichloride (EDC) plants to monitor the ethylene content in the vent gas. This helps the control systems maintain a constant concentration in the vent gas and also ensures that the concentration is main- tained at safe levels during start-up. Background In one method of production for EDC, chlorine and ethylene are mixed in

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