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
053607783
ABSTRACT:
High surface purity heat transfer solids are formed, suitably by washing and treating particulate refractory inorganic solids, notably alumina, which contains as impurities up to about 0.5 wt. % silicon and/or up to about 500 wppm boron, with an acid, or dilute acid solution sufficient to reduce the concentration of silicon and boron in the outer peripheral surface layer of the particles, e.g., as measured inwardly toward the center of a particle to a depth of about 50 .ANG. using X-ray photoelectron spectroscopy, to no greater than about 5 atom percent silicon and boron, preferably about 2 atom percent silicon and boron, based on the total number of cations within said outer peripheral surface layer, thereby reducing the tendency of said particles to sinter and agglomerate in the conversion of said hydrocarbon to hydrogen and carbon monoxide in a fluidized bed synthesis gas operation vis-a-vis particles otherwise similar except that the particles are not treated with the acid. The tendency of the particles to sinter and agglomerate is further reduced by the additional removal of sodium, iron, calcium, and titanium impurities from the outer peripheral surface layer of the particles. Preferably the latter named impurities, or impurities other than silicon and boron, are reduced to a concentration below about 20 atom %, more preferably to a concentration below about 15 atom %, in the outer surface layer of the particles.
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.
LandOfFree
High surface purity heat transfer solids for high temperature fl does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High surface purity heat transfer solids for high temperature fl, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High surface purity heat transfer solids for high temperature fl will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1802445