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Regeneration of supported ruthenium catalyst

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TLDR
In this paper, a supported ruthenium catalyst which has been used for conversion of carbohydrates to polyhydric alcohols is regenerated by contacting the catalyst with an aqueous solution of a mineral acid, such as sulfuric, hydrochloric, or phosphoric acid.
Abstract
Regeneration of supported ruthenium catalysts. A supported ruthenium catalyst which has been used for conversion of carbohydrates to polyhydric alcohols is regenerated by contacting the catalyst with an aqueous solution of a mineral acid, such as sulfuric, hydrochloric, or phosphoric acid. Dilute acids, e.g., 0.01 N to 0.5 N, are preferred.

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Method for hydrogenating aqueous solutions of carbohydrates

TL;DR: The use of zinc on titanium dioxide in the hydrogenation of glucose affords sorbitol in excellent yields with quite high selectivity as discussed by the authors, which may be used advantageously in the reduction of aqueous solutions of carbohydrates.
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References
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Process for producing maltitol

TL;DR: In this paper, a process for producing maltitol from a starch slurry is described, which consists of hydrolyzing the mixture with beta-amylase and alpha-1,6-glucosidase to produce a high maltose containing product and catalytically hydrogenating the maltose with Raney nickel after adjusting the pH of the product with calcium carbonate.
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