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Compared with the previous month, significant changes occurred in the structure and quality of raw materials: naphtha alkane content decreased, light hydrocarbons, paraffin-enriched gas input decreased, and tail oil input increased, which significantly restricted the increase of ethylene yield. In order to increase propylene production, they adopted a series of measures under the premise of stable operation: Adjusting the ratio of polymer-grade and chemical-grade propylene production, adopting appropriate chemical grades, effectively increasing the yield of propylene, and lowering the chemical grade under the condition of ensuring product quality. Propene purity, reducing excess purity, producing about 15 tons of propylene per month; increasing the return of polypropylene tail gas, optimizing the operation of carbon triple hydrogenation, increasing the propylene increase, and increasing the propylene yield in September by 0.02 percentage point.
Qilu Ethylene Diene Yields New Heights
In September, Qilu Petrochemical Company's ethylene plant diene yield reached 45.03%, which was a new record after the technical indicator exceeded the assessment value of the company for 45% for the first time in August.