Supported catalysts and a process for their preparation
AssigneeHoechst Aktiengesellschaft
InventorsGerhardt Horn, Carl D. Frohning
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Abstract
Supported catalysts containing nickel, magnesium oxide and, if desired, further additives, which contain reduced Mg and Ni in a molar ratio of (0.0075 to 0.075):1. The catalyst also have an active nickel metal surface area of 110 to 180 m.sup.2 /g of Ni, and a BET total surface area of 160 to 450 m.sup.2 /g. The invention furthermore relates to a process for the preparation of the catalysts and to their use as catalysts for the hydrogenation of aliphatic and/or aromatic hydrocarbons.
Claims24
A catalyst in reduced form containing Mg and Ni in a molar ratio of (0.0075 to 0.075):
- 1, and a water-insoluble support in an amount of 17.0 to 60.0 grams of support per mol of Ni, wherein active nickel metal surface area is 110 to 180 m.sup.2 /g of Ni, and 65 to 97% of a BET total surface area is formed by pores of radius r.sub.p .ltoreq.2.5 nm.
A composition containing magnesium and nickel in non-reduced form in a catalyst molar ratio of (0.0075 to 0.075):
- 1, 17.0 to 60.0 g of a support per mol of said nickel, and 2% to 25% by weight of water,
- said composition prepared by coprecipitating a coprecipitate comprising said magnesium and said nickel in a precipitation molar ratio of (0.02 to 0.25):
- 1 in the presence of 17.0 to 60.0 g of said support per mol of said nickel at a pH of 6 to 8.5 and a precipitation temperature of 90.degree. to 110.degree. C., and thereafter washing said coprecipitate with water at a washing temperature of 60.degree. to 90.degree. C.
Dependencies are inferred from the claim text.