Problem The Axiall Corporation chemical plant in Westlake, La., a maker of chlorovinyl products, decided to upgrade several gas chromatographs within an analyzer building. The analyzers monitor chemical streams such as 1,1 ethlylene dichoride and 1,2 ethylene dichloride used primarily in the production of vinyl chlorides. Axiall is North America's second-largest producer of vinyl chloride monomer. Examples of stream components measured by the online gas chromatographs include methyl chloroform, ethylene, vinyls, butadiene, nitrogen, oxygen, carbon monoxide, and carbon dioxide. The online GC analyzer values are communicated to a central digital computer system (DCS) in…Full Story
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