Method for preparing dual colloid compositions

Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Inorganic carbon containing

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502200, 502241, 502243, 502250, 502254, 502256, 502258, 502259, 502260, 502261, 502302, 502303, 502304, 502313, 502315, 502316, 502328, 502330, 502332, 502335, 502336, B01J 2104, B01J 2108, B01J 2346, B01J 2374

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045887055

ABSTRACT:
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.

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"Catalytic Activity of Systems Based on Coordination Cyanides of Copper, Iron Ruthenium, and Osmium in the Reaction of Ammonia Synthesis" by Tkachenko et al.
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"Study of the Thermal Dissociation of Prussion Blue" by Zarovnyatnykh et al.
"Ammonia Synthesis with Catalysts Derived from Complex Iron Cyanides" by A. Mittasch.

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