Method for manufacturing isobutene

摘要

Producing a catalyst comprising 0.1-20 wt.% alkali(ne earth) metal oxide, 0.1-99 wt.% aluminum oxide and 0.1-99 wt.% silicon dioxide comprises treating an aluminosilicate with an aqueous alkali(ne earth) metal salt solution and calcining the product. Independent claims are also included for: (1) catalyst comprising 0.5-20 wt.% alkali(ne earth) metal oxide, 4-30 wt.% aluminum oxide and 60-95 wt.% silicon dioxide; (2) producing isoolefins of formula (I) by gas-phase decomposition of an alcohol or ether of formula (II) at 110-450[deg] C and 0.1-2 MPa using a catalyst as above. R 1>CH=CR 2>R 3> (I) R 1>CH 2-CR 2>R 3>-OR (II) R, R 1> : H, Me or Et; R 2>, R 3> : Me or Et. ACTIVITY : ACTIVITY - MECHANISM OF ACTION : MECHANISM OF ACTION .