Abstract
A five-factor four-level Taguchi L16 orthogonal design was used to determine optimized factors of the [titanium tetrabutoxide (Ti(OC4H9)4)–triethyl aluminum (TEA)] catalyst system with two additives: tetrahydropyran (THP) as an electron donor ligand and chloroethane (CE) as a halide promoter. Tests determined the effects of temperature, pressure, TEA/Ti, THP/Ti, and CE/Ti molar ratios on overall yield of reaction (YR(%)) and weight of polymer (WPE(mg)) and evaluations were investigated by signal to noise (S/N) ratios and their mean. Moreover, analysis of variance (ANOVA) determined that the THP/Ti molar ratio (with 33.42%) and the temperature (38.99%) had the highest contributions in YR and WPE, respectively, for the aforesaid newly introduced four-member system. The confirmation tests showed very good consistency between predicted and actual results. The results show that this previously untested method can efficiently increase YR and decrease WPE and better demonstrates the role of the catalyst. The results can be applied to improve 1-butene production on an industrial scale and minimize polymer fouling that could result in a reactor shutdown.
Published Version
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