Phosphoric Acid Crystallization Above 0°C for High-Purity Recovery
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Solution Overview
Problem
Existing methods for producing high-purity phosphoric acid are costly, time-consuming, and inefficient, particularly when using seed-based crystallization at low temperatures, and there is a need for an economical and industrial method to separate impurities from low-grade phosphoric acid.
Innovation Solution
A method involving quantum coupling of phosphoric acid at temperatures above zero Celsius using a cooling device with adjusted roughness to activate crystallization, forming phosphoric acid crystals without a seed, and subsequent purification steps to achieve high-purity phosphoric acid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If crystallization is performed at low temperature (below 0°C) without seed, then high-purity phosphoric acid can be obtained, but production cost and time increase significantly
Solution Approach 1:
The patent introduces a nucleation promoter as an intermediary substance to facilitate crystal nucleation at higher temperatures. The promoter creates favorable conditions for nucleation without requiring extreme low temperatures, thus resolving the contradiction between obtaining high purity crystals and reducing crystallization time/cost.
Solution Approach 2:
The patent changes the temperature parameter from below 0°C to above 0°C (specifically 20-80°C) by introducing the nucleation promoter. This parameter change allows crystallization to proceed efficiently at milder conditions, reducing time and cost while maintaining product purity.
2Temperature
If seed-based crystallization is used, then crystallization can proceed at higher temperatures, but the process becomes more complex and costly
Solution Approach 1:
The patent uses a chemical nucleation promoter instead of reusable seed crystals. The promoter is a simple chemical substance that facilitates nucleation without requiring the complexity of seed crystal preparation, handling, and reuse processes. This simplifies the overall device and process complexity.
Solution Approach 2:
The patent replaces the mechanical/physical method of seed-based nucleation with a chemical method using nucleation promoters. This substitution eliminates the need for mechanical seed crystal handling and introduces a simpler chemical addition process, reducing device complexity.
3Manufacturing precision
If conventional purification methods (film separation, ion exchange, liquid extraction) are used, then phosphoric acid can be purified, but process cost, complexity, or continuous operation requirements increase
Solution Approach 1:
The patent utilizes the phase transition from liquid phosphoric acid to solid crystal form through controlled crystallization. This phase transition naturally separates pure phosphoric acid from impurities, achieving high purification without requiring complex film separation, ion exchange, or liquid extraction processes.
Solution Approach 2:
The patent extracts pure phosphoric acid in the form of crystals from the liquid solution containing impurities. The crystallization process selectively extracts the pure substance while leaving impurities in the mother liquor, achieving purification through simple filtration of the formed crystals.
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 enables the production of high-purity phosphoric acid economically and industrially by separating impurities, achieving excellent yield and purity without the need for low-temperature crystallization.
Implementation Method 1
forming phosphoric acid crystals by stirring the phosphoric acid raw material
Implementation Method 2
activating quantum coupling of phosphoric acid at a temperature above zero (0° C. or higher)
Data Source
AI summary
The present disclosure relates to a method for producing high-purity phosphoric acid from low-purity phosphoric acid by forming pure phosphoric acid crystals using crystallization purification through quantum coupling of phosphoric acid. In particular, the present disclosure relates to a method for producing phosphoric acid capable of obtaining high-purity phosphoric acid from low-grade phosphoric acid economically and industrially by obtaining pure crystals from a phosphoric acid raw material containing a large amount of impurities through activating quantum coupling of phosphoric acid at a temperature above zero (0° C. or higher).