Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1976-11-26
1978-03-28
Shine, W. J.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252465, 252466J, 252466PT, B01J 2104, B01J 2112, B01J 2364, B01J 2384
Patent
active
040814068
ABSTRACT:
An improved process for the production of catalysts comprised of a metal hydrogenation component, or components, composited with high pore volume alumina, with pores of narrow pore size distribution, wherein macropore volume is drastically reduced by improved extrusion techniques. An alumina hydrogel paste is extruded through a die to form spaghetti-like extrudate shapes by application of sufficient torque, suitably from about 25 to about 55 inch-pounds, preferably from about 40 to about 50 inch-pounds, to eliminate much of the macropore volume, i.e., pores greater than 400A, which greatly improves the activity maintenance of the catalyst. The extrudates can, if desired, be shaped into other forms, suitably spheres. The improved process also embodies a technique for increasing the intrinsic activity of these and other catalysts by special impregnation techniques which provides better dispersion of the metal hydrogenation component, or components, throughout the catalyst.
REFERENCES:
patent: 3900427 (1975-08-01), Riley et al.
Exxon Research & Engineering Co.
Proctor Llewellyn A.
Shine W. J.
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