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FLOS series additive
FLOS series additive is a promoter for selectively enhancing FCC propylene & isobutene yields. Both propylene and isobutene from FCCU are important raw materials for chemical industry. FLOS series additive provides a flexible solution for light olefins boosting which could be tailored in formulations according to refinery situation. FLOS-I is specially designed mainly for enhancing propylene yield while FLOS-II mainly for isobutene yield. FLOS-III is an additive for enhancing propylene and isobutene yields.
Design Philosophy Based on the studies of hydrocarbon reaction chemistry and catalytic material chemistry, a new concept is proposed for promoting propylene & isobutene productions: the precursor for C3 and C4 olefins are essentially C6-C8 carbenium ions. Zeolites with distinct topologies can give different product selectivity. Furthermore, the acid properties of catalytic materials were modified to improve the mono-molecular cracking of C6-C8 secondary and tertiary carbenium carbonium ions and depress the hydrogen transfer reaction. Meanwhile, isomerization of n-butene is promoted by incorporating a novel matrix material.