A device for preparing tetravalent uranium by electrolytic reduction

Abstract

The invention relates to an electrolytic device and provides a device for preparing tetravalent uranium by electrolytic reduction to solve the problems of low tetravalent uranium yield of an existing diaphragm-free electrolysis device and complicated equipment, high cost and the like of a diaphragm electrolysis device. The device comprises an electrolytic tank body with an insulated inner wall, an anodic platinized and titanized rod and a cathodic titanium net, wherein the cathodic titanium net is barrel-shaped, the anodic platinized and titanized rod is arranged on the axial line of the barrel-shaped cathodic titanium net, and the surface area ratio of the cathodic titanium net to the anodic platinized and titanized rod is (10 to 1) to (20 to 1). The device for preparing tetravalent uranium by electrolytic reduction is simple in structure, high in tetravalent uranium yield and more convenient to operate and repair, overcomes the defect of low tetravalent uranium yield of the existing diaphragm-free electrolysis device and solves the problems of complicated equipment, high cost and the like of the diaphragm electrolysis device; the tetravalent uranium yield is more than 90% during a static electrolytic process.

Description

technical field [0001] The invention relates to an electrolysis device, in particular to a device for preparing tetravalent uranium through electrolytic reduction. Background technique [0002] In power reactor nuclear fuel reprocessing plants, tetravalent uranium is usually used as a reducing agent to separate uranium and plutonium, for example, UP2-800 and UP3 plants in France, RT-1 plant in Russia, and Tokaimura reprocessing plant in Japan And Liusuo reprocessing plant, THORP plant in the UK, etc. [0003] At present, the methods for preparing tetravalent uranium in reprocessing plants mainly include direct electrolysis and catalytic hydrogenation. The catalytic hydrogenation method is based on silica gel beads loaded with platinum as a catalyst, and UO is reduced with hydrogen under high pressure. 2 (NO 3 ) 2 The nitric acid solution is prepared by the chemical reaction between the gas, liquid and solid phases to obtain U(NO 3 ) 4 solution. The catalytic hydrogena...

AI Technical Summary

Problems solved by technology

[0012] In order to solve the problems such as the low yield of tetravalent uranium in the existing diaphragmless electrolysis device and to avoid the problems of complex equipment and high cost in the diaphragm electrolysis device, the present invention provides a device for preparing tetravalent uranium by electrolytic reduction

Images