Boron-10 Enriched Boric Acid Defluorination Without Recrystallization
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Solution Overview
Problem
Existing methods for preparing boron-10 enriched boric acid for nuclear power primary circuits require secondary treatments like recrystallization to reduce fluoride ion content, leading to low yield and complex operations.
Innovation Solution
A method involving reflux treatment with methanol, defluorination using an agent like ion exchange resin, rectification, condensation, and solid-liquid separation to produce low-fluorine boron-10 enriched boric acid, eliminating the need for recrystallization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If secondary treatment such as recrystallization is used to reduce fluoride ion content, then fluoride ion content is reduced, but product yield decreases and operation becomes complicated
Solution Approach 1:
The patent extracts fluoride ions from the boric acid solution through ion exchange treatment, removing the harmful substance directly without requiring recrystallization. This extraction approach achieves fluoride reduction while maintaining high product yield and simplifying the operation process.
Solution Approach 2:
The patent changes the chemical parameters of the solution by adjusting pH and using ion exchange resins to selectively remove fluoride ions. This parameter-based approach allows fluoride reduction without altering the fundamental crystallization process, thereby maintaining high yield and operational simplicity.
2Object-affected harmful factors
If secondary treatment such as recrystallization is used to reduce fluoride ion content, then fluoride ion content is reduced, but operation becomes complicated
Solution Approach 1:
The patent extracts fluoride ions through ion exchange treatment, removing the need for complex recrystallization operations. This extraction method simplifies the操作流程 while achieving the required fluoride reduction, making the process easier to operate.
Solution Approach 2:
The patent introduces ion exchange resin as an intermediary substance to remove fluoride ions from the solution. This mediator approach simplifies the operation by providing a straightforward treatment step rather than requiring complex recrystallization procedures.
3Quantity of substance
If isotope separation with boron trifluoride is used to enrich boron-10, then boron-10 enrichment is achieved, but fluoride ion content increases
Solution Approach 1:
The patent converts the harmful effect of high fluoride content (generated during boron-10 enrichment) into a treatable parameter by using ion exchange to selectively remove fluoride ions. This approach transforms the enrichment process from producing harmful byproducts to creating a product that can be easily purified.
Solution Approach 2:
The patent uses ion exchange resin as an intermediary to separate and remove fluoride ions from the enriched boric acid solution. This mediator allows the beneficial boron-10 enrichment to be maintained while eliminating the harmful fluoride contamination.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method achieves a high yield of 95.73% to 98.60% with fluoride ion content as low as 0.21 ppm to 0.31 ppm, suitable for nuclear power applications without harmful by-products.
Implementation Method 1
subjecting a gaseous material produced during the reflux treatment to a defluorination treatment by using a defluorination agent
Implementation Method 2
subjecting a resulting defluorinated material to rectification and then condensation
Implementation Method 3
subjecting a raw material liquid to a reflux treatment, subjecting a gaseous material produced during the reflux treatment
Implementation Method 4
mixing the resulting distillate fraction with water and subjecting a resulting mixture to a hydrolysis treatment to obtain a hydrolysate
Data Source
AI summary
Provided are a method and an apparatus for preparing a low-fluorine boron-10 enriched boric acid. The method includes subjecting a raw material liquid to a reflux treatment, subjecting a gaseous material produced during the reflux treatment to a defluorination treatment by using a defluorination agent, subjecting a resulting defluorinated material to rectification and then condensation, and returning a resulting condensed material to a cycle and conducting the reflux treatment, where the raw material liquid includes a high-fluorine boron-10 enriched boric acid and methanol; after the reflux treatment is completed, maintaining distillation and receiving a resulting distillate fraction, and mixing the resulting distillate fraction with water and subjecting a resulting mixture to a hydrolysis treatment to obtain a hydrolysate; and concentrating the hydrolysate, and subjecting a resulting concentrated solution to solid-liquid separation to obtain the low-fluorine boron-10 enriched boric acid.