Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Silicon containing or process of making
Patent
1988-11-30
1990-09-25
Dees, Carl F.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Silicon containing or process of making
502238, B01J 2112
Patent
active
049593382
ABSTRACT:
The present invention relates to a heat-resistant catalyst carrier and a catalyst carrier molding comprising silica and alumina, in which a silica content is in a range of 2% by weight to 30% by weight, and an overall pore volume is at least 0.3 ml/g and a volume of pores having a diameter of 100 .ANG. or larger accounts for at least 60% of the overall pore volume, or which have a specific surface area of at least 20 m.sup.2 /g after firing at 1200.degree. C. in air, or which show a peak area at -110 ppm to -130 ppm which is 0 to 10% with respect to a peak area at -50 ppm to -130 ppm, as measured by the nuclear magnetic resonance (.sup.29 Si-NMR) method using silicone rubber (-21.9 ppm) as a reference peak after firing at 500.degree. C. in air, and is also concerned with a catalyst for combustion comprising the same. The catalyst carriers and moldings can retain large pore volume and specific surface area even upon held under high-temperature and --humidity conditions over an extended period of time, while the catalysts for combustion can retain high reactivity with reduced or limited deactivation.
REFERENCES:
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patent: 4399057 (1983-08-01), Hensley, Jr. et al.
patent: 4497909 (1985-02-01), Itoh et al.
patent: 4631268 (1986-12-01), Lachman et al.
patent: 4631269 (1986-12-01), Lachman et al.
patent: 4778779 (1988-10-01), Murrell et al.
Itoh Takuji
Kadono Masaaki
Miura Tadashi
Shimada Masakichi
Dees Carl F.
Toa Nenryo Kogyo Kabushiki Kaisha
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