Process for producing saccharide oxides.

摘要

The present invention relates to a process for producing saccharide oxides by oxidation reaction wherein an alkaline aqueous suspension comprising palladium carbon catalyst suspended in an aqueous saccharide solution is contacted with an oxygen-containing gas, the aqueous suspension containing the saccharide and palladium carbon in a vessel is circulated by means of a circulating pump and a circulating pipe and this circulating pipe is connected with an injector of such a type that the gas is sucked in as the liquid is injected out to mix them together, whereby the oxygen-containing gas is sucked in by means of the circulating liquid to effect the oxidation reaction. If V1 is the amount of the suspension in the reaction vessel (liters) and V2 the amount of the circulating liquid per minute (liters) and V3 the amount of oxygen gas sucked per minute (liters), the ratio of V2/V1 should be 0.1 - 10. It is desirable to use an injector having a sucking capacity under atmospheric pressure of V3/V2 of 0.1 - 100 (oxygen).