Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Boron or compound containing same
Patent
1993-05-11
1994-11-01
Dees, Carl F.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Boron or compound containing same
502232, 502355, 502415, B01J 2002, B01J 2030, B01J 2102
Patent
active
053607775
ABSTRACT:
Alumina heat transfer solids are admixed with a catalyst, or catalysts, and used in conducting high temperature fluidized bed reactions, particularly in a process for the production of hydrogen and carbon monoxide from a low molecular weight hydrocarbon by contact with a fluidized bed of catalyst and said heat transfer solids at high temperature in the presence of oxygen, or steam, or both oxygen and steam. The particulate heat transfer solids are characterized as having a performance index, PI, greater than 20, preferably greater than 40, as characterized by the formula PI=[(i).times.(ii).times.(iii).times.(iv)].sup.-1 where (i) the peripheral outer surface of the particle contains <5 atom % (Si+B) as impurities, and (ii) <20 atom % Na, Fe, Ca and Ti as impurities, where the bulk concentrations of the (Si+B) is sufficient to migrate into and contaminate the outer surface layer of the particles at process conditions. Moreover the (iii) tapped bulk density of the particles range from about 1.2 g/cc to about 2.5 g/cc, and (iv) the Davison Attrition Index of the particles is no greater than about 12.
REFERENCES:
patent: 2961297 (1960-11-01), Fenerty
patent: 3105739 (1963-10-01), Hayes
patent: 3271325 (1966-09-01), Davies et al.
patent: 3883442 (1975-05-01), McArthur
patent: 4703028 (1987-10-01), Steininger
Clavenna LeRoy R.
Davis Stephen M.
Fiato Rocco A.
Say Geoffrey R.
Dees Carl F.
Exxon Research and Engineering Company
Proctor Llewellyn A.
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