Supported silver catalyst

Details Supported silver catalyst Supported silver catalyst

B - Operations, Transporting

01

J

252/85, 260/572.

B01J 23/50 (2006.01) C07C 45/38 (2006.01) C07C 47/055 (2006.01)

Patent

CA 1165751

ABSTRACT OF THE DISCLOSURE A process for preparing a granular, supported silver catalyst by: contacting refractory porous granules having a tap volume of about 1 to 2 grams per cubic centimeter with water or a water soluble liquid having a boiling point of less than about 105°C so as to wet said granules and to absorb water or said soluble liquid within peripheral pores of said granules; contacting the wet granules with an ammoniated solution containing a silver salt which decomposes on calcination at a temperature below about 600°C and a fatty acid having from about 12 to 22 carbon atoms, the quantity of silver salt in said solution being sufficient to provide a metallic silver deposit onto said granules of from about 1 to 10% by weight of said dry granules; drying the silver solution on the granules, and heating the dried granules at a temperature sufficient to decompose the dried silver compounds to metallic silver. The catalyst is particularly advantageous for the manufacture of formaldehyde in place of the use of silver crystals.

387253

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