Exxon Research and Engineering Company

Michael A Richard

Thomas H Vanderspurt

Angelo A Montagna

Franklin J Wright

James C Pirkle, Jr

Tessie M Che

Disclosed is a method for preparing dual colloid catalyst compositions which are suitable for use in such processes as ammonia synthesis, carbon monoxide hydrogenation, hydrogenation and denitrogenation. The method comprises forming a gel, or suspension, by admixing: (i) one or more transition metal cyano-containing anionic-complex solutions wherein at least one solution contains a reducible transition metal, and wherein one or more of these solutions optionally contains a nonreducible metal, with (ii) one or more solutions containing polyvalent metal cations. The resulting gel, or suspension is heated to a temperature of about 90.degree. C. to about 150.degree. C. for an effective amount of time to allow hydrolysis and polymerization to occur. The resulting solid is then filtered and ion exchanged with ions of one or more metals selected from those exchangeable metals from groups IA, IIA, IIIB, IVB, VIB, VIIB, and VIII of the Periodic Table of the Elements. The resulting ion-exchanged material is then dried.

Method for producing dual colloid catalyst composition

Disclosed herein are catalyst compositions comprised of:

Dual colloid catalyst compositions

Disclosed is a method for preparing dual colloid catalyst compositions wherein a gel, or colloidal suspension is formed by admixing (a) a 0.6 to 10M aqueous solution containing one or more soluble salts or complexes of one or more transition metals, wherein at least one of the transition metals is reducible and hydrolyzable, and one or more elements selected from Cr, Al, Si, Th, U, the lanthanides, and elements from Groups IA and IIA of the Periodic Table of the Elements, with (b) a 0.5 to 10N aqueous base solution. The solid material is separated from the resulting gel, or colloidal suspension and washed and dried.

Method for preparing dual colloid catalyst compositions

Disclosed is a method for preparing dual colloid catalyst compositions which are suitable for use in such processes as ammonia synthesis, carbon monoxide hydrogenation, hydrogenation and denitrogenation. The method comprises forming a gel, or suspension, by admixing: (i) one or more transition metal cyano-containing anionic-complex solutions wherein at least one solution contains a reducible transition metal, and wherein one or more of these solutions optionally contains a nonreducible metal, with (ii) one or more solutions containing polyovalent metal cations. The resulting gel, or suspension is heated at a temperature of about 90.degree. C. to about 150.degree. C. for an effective amount of time to allow hydrolysis and polymerization to occur. The resulting solid is then separated and dried.

Method for preparing dual colloid compositions

A process is described using novel thallium-promoted iron catalysts in CO hydrogenation with steam. Mixtures of CO and steam are converted to liquid C.sub.6 -C.sub.13 hydrocarbons containing substantial amounts of C.sub.6 -C.sub.13 aromatics.

Process for producing aromatic hydrocarbons from carbon monoxide and

CO hydrogenation process is described utilizing novel thallium-promoted iron catalysts. Mixtures of CO/H.sub.2 are selectively converted to liquid C.sub.6 -C.sub.11 hydrocarbons containing C.sub.6 -C.sub.11 aromatics, alpha olefins and very small amounts of C.sub.23 + hydrocarbon waxes.

Process using iron-thallium catalysts in CO hydrogenation

CO hydrogenation process for producing alcohols is described utilizing novel thallium-promoted iron catalysts. Mixtures of CO/H.sub.2 are selectively converted to liquid C.sub.6 -C.sub.12 hydrocarbons containing C.sub.6 -C.sub.12 alcohols with attendant low methane and low CO.sub.2 make.

Process for producing alcohols using iron-thallium catalysts

An improved catalyst for the synthesis of ammonia is described wherein a promoted iron-derived, pre-reduced catalyst is oxidatively leached with a neutral aqueous solution of potassium cyanide. Preferably an organic carboxylic acid such as citric acid is added to the aqueous solution to maintain the pH at about neutral. The resulting leached catalyst has a markedly higher activity than the unleached catalyst. The leached catalyst may be contacted with a cobalt complex or a nickel salt to incorporate cobalt or nickel therein which catalysts are also useful for ammonia synthesis.

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Fanwood, NJ, United States of America

Michael A Richard