Hetero-polyadd

This exotfaennic reaction takes place in the liquid hase between 50 aod at 0.7 tp 1.5.10 Pa, depending on the specific process. It is catalyzed by catioo exchange resins of the Dowex SOW, Amberlite IR 1 or IR 100, Naldte MX type etc., or hetero-polyadds promoted by a metal At the reactor inlet, the methanol to isobutene mole ratio is about 1.15 to 1.10/1, and the WHSV (Weight Honriy Space Vdodty) is around 10 to 15. The main by-products formed are diisobutylene ax r-butyi alcohol Their production is limited by controlling the temperature level for the fir and the water content of the reaction medium for the second. Catalyst life is nsuafly one year. 

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