New catalyst for skeletal isomerization of olefins
The catalyst, which combines high activity and selectivity for isoolefins with outstanding mechanical, thermal, and hydrothermal stability, is an active alumina in the ..gamma.. or g form modified by treatment with tetraethyl orthosilicate to obtain an imperfect monolayer of surface silica. When used to isomerize n-butenes to isobutene at 470/sup 0/C, the catalyst showed a 78% by wt selectivity at 35% n-butene conversion and 27% isobutene yield per pass and was able to withstand over 100 cycles of regeneration with air at 500/sup 0/-550/sup 0/C with no significant deactivation or sintering. Isomerization of n-butenes to isobutene in mixed C/sub 4/ streams used as feedstocks in the Snamprogetti S.p.A./ANIC S.p.A. synthesis of methyl tert.-butyl ether (MTBE) (by reacting isobutene with methanol, can increase the yield of MTBE from the same feedstocks, such as catalytic cracker C/sub 4/ streams, by 70%. Based on the present availability of C/sub 4/ feedstocks, world-wide (U.S.) MTBE production capacities can be thus increased from 17.6 (11.3) to 60 (43.2) million tons/yr.
- Research Organization:
- Snamprogetti S.P.A.
- OSTI ID:
- 6320915
- Report Number(s):
- CONF-8003198-
- Journal Information:
- Natl. Pet. Refiners Assoc. Annu. Meet. Pap.; (United States), Journal Name: Natl. Pet. Refiners Assoc. Annu. Meet. Pap.; (United States) Vol. AM-80-44
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400300 -- Organic Chemistry-- (-1987)
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
ETHERS
HYDROCARBONS
ISOMERIZATION
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PRODUCTION
REGENERATION
SILICON COMPOUNDS
SILICON OXIDES
SPECIFICITY