Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1977-05-27
1979-01-23
Shine, W. J.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252463, 252464, 252465, 4232132, 4232135, 423628, B01J 2104, B01J 2322, B01J 2324, B01J 2374
Patent
active
041360630
ABSTRACT:
The present invention relates to a catalyst carrier characterized by the fact that it comprises a substance which promotes a transition of an alumina that can be converted to .alpha.-alumina, which substance is located near the surface of a carrier composed mainly of alumina and which carrier is subjected to a heat treatment under appropriate conditions, thereby causing the transition of said alumina to .alpha.-alumina, with those pores near the surface made larger in diameter than those pores located more deeply within the carrier. The invention also includes a method of manufacturing said catalyst carrier.
REFERENCES:
patent: 2474440 (1949-06-01), Smith et al.
patent: 3340011 (1967-09-01), Hoekstra et al.
patent: 3428575 (1969-02-01), Pijpers et al.
patent: 3701822 (1972-10-01), Negra et al.
Akizuki Hiroyuki
Kimura Sadahiro
Uchida Kiyoshi
Shine W. J.
Toyota Jidosha Kogyo Kabushiki Kaisha
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