Selective dimerization of 1-butene on Ni exchanged zeolite LTA to n-octene and methyl heptene occurs via Cossee-Arlman mechanism. With increasing conversion, isomerization to 2-butene led also to dimethylhexene and catalyst deactivation. Dimerization of 1-butene was an order of magnitude faster than dimerization of 2-butene. The presence of alkali and alkali earth cations increased the isomerization rates, but did not affect the dimerization activity of Ni sites, allowing to reach higher selectivities to n-octene and methylheptenes.
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Selective dimerization of 1-butene on Ni exchanged zeolite LTA to n-octene and methyl heptene occurs via Cossee-Arlman mechanism. With increasing conversion, isomerization to 2-butene led also to dimethylhexene and catalyst deactivation. Dimerization of 1-butene was an order of magnitude faster than dimerization of 2-butene. The presence of alkali and alkali earth cations increased the isomerization rates, but did not affect the dimerization activity of Ni sites, allowing to reach higher selecti...
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