Method for improving the solubility of molybdenum in molybdenum-rich silicate glass and glass melts.

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By combining ZrO2 and P2O5 in the glass composition, the solubility of molybdenum in nuclear waste glass is enhanced, addressing phase separation issues and reducing package production costs.

JP2026524904APending Publication Date: 2026-07-24COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES +1

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Patent Information

Application Number: JP2026500262
Authority / Receiving Office: JP · JP
Patent Type: Applications
Current Assignee / Owner
Priority Date: 2023-07-07
Filing Date: 2024-07-05
Publication Date: 2026-07-24

Application Information

Patent Timeline

07 Jul 2023

Priority

05 Jul 2024

Application

JP2026500262

24 Jul 2026

Publication

JP2026524904A

IPC: C03C3/097; C03C3/062; C03C3/064; C03C3/066; G21F9/16

CPC: C03C3/097; C03C1/002

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Application Domain

Radioactive decontamination

Technology Topics

Alkali metal oxide Silicate glass

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AI Technical Summary

Technical Problem

Existing vitrification processes face challenges in incorporating high concentrations of molybdenum in nuclear waste glass without causing phase separation, which limits the solubility and necessitates multiple packages, increasing energy, time, and cost.

Method used

A combination of zirconium dioxide (ZrO2) and phosphorus pentoxide (P2O5) is added to the glass composition to enhance molybdenum solubility, reducing phase separation temperature and maintaining homogeneity, thereby allowing higher molybdenum content in the glass.

Benefits of technology

The synergistic effect of ZrO2 and P2O5 lowers the phase separation temperature, enabling the production of homogeneous molybdenum-rich glass at industrial temperatures, reducing package production and associated costs.

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Abstract

The present invention relates to silicate glass comprising 35-45% by mass of silicon dioxide (SiO2), up to 15% by mass of molybdenum trioxide (MoO3), 4-7% by mass of zirconium dioxide (ZrO2), 1-3.5% by mass of phosphorus pentoxide (P2O5), and 14-28% by mass of one or more alkali metal oxides and / or one or more alkaline earth metal oxides, wherein the mass percentages thereof are expressed relative to the total mass of the glass. The present invention also relates to a method for improving the solubility of molybdenum in a glass molten material.

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