Preparation of highly active copper-silica catalysts
First Claim
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1. In a method for preparing highly active and selective linolenate-reducing, copper-silica catalysts including the steps of:
- a. reacting sodium silicate from an aqueous solution with a water-soluble copper salt to form a precipitate;
b. recovering said precipitate from said aqueous solution;
c. drying said recovered precipitate from step (b); and
d. heat treating said dried precipitate from step (c) at a temperature in the range of 350°
-625°
C. to yield said catalyst,the improvement comprising conducting said drying in step (c) under a vacuum at room temperature or less.
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Abstract
Highly active and selective linolenate-reducing, copper catalysts are prepared by vacuum drying copper-silica coprecipitates, and then activating the precipitates by heat treatment. The resultant catalysts are characterized by activities 2-3.5 times those of commercial copper chromites and also possess comparable linolenate selectivities.
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Citations
6 Claims
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1. In a method for preparing highly active and selective linolenate-reducing, copper-silica catalysts including the steps of:
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a. reacting sodium silicate from an aqueous solution with a water-soluble copper salt to form a precipitate; b. recovering said precipitate from said aqueous solution; c. drying said recovered precipitate from step (b); and d. heat treating said dried precipitate from step (c) at a temperature in the range of 350°
-625°
C. to yield said catalyst,the improvement comprising conducting said drying in step (c) under a vacuum at room temperature or less. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification
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Current AssigneeUnited States Department Of Agriculture
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Original AssigneeUnited States Department Of Agriculture
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InventorsKoritala, Sambasivarao
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Primary Examiner(s)Gantz, Delbert E.
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Assistant Examiner(s)Wright, William G.
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Application NumberUS05/873,572Time in Patent Office652 DaysField of Search252/454US Class Current502/234CPC Class CodesB01J 23/72 CopperC11C 3/126 using catalysts based princ...
