Phosphoric Acid Crystallization for Low-Grade Feed Purification
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Solution Overview
Problem
Existing methods for producing high-purity phosphoric acid are costly and inefficient, requiring high-quality phosphorite reserves and complex processes, and fail to effectively remove impurities from low-grade phosphoric acid for semiconductor manufacturing.
Innovation Solution
A method involving temperature control and quantum behavior manipulation to form phosphoric acid crystals, using a cooling device and phosphoric acid seeds to suppress impurity trapping, followed by high-temperature treatment to remove surface impurities, achieving high-purity phosphoric acid from low-grade sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the dry method of extracting yellow phosphorous from high-quality phosphorite is used, then high-purity phosphoric acid can be produced, but process cost increases and high-quality phosphorite reserves are depleted
Solution Approach 1:
The patent changes the temperature parameter during crystallization to control the behavior of impurities. By maintaining the crystallization temperature above the melting point of specific impurities (such as 20°C for aluminum phosphates), the impurities remain in the liquid phase while phosphoric acid crystallizes, achieving purification without requiring expensive dry method processing
Solution Approach 2:
The patent utilizes phase transition differences between phosphoric acid and impurities during cooling crystallization. Phosphoric acid transitions from liquid to solid crystals while impurities with higher melting points remain liquid, enabling separation based on phase behavior rather than complex chemical processing
2Device complexity
If crystallization is performed without phosphoric acid seed, then the process is simpler, but crystallization requires temperature of 40°C or lower which increases cost and time
Solution Approach 1:
The patent introduces phosphoric acid seeds before crystallization to initiate crystal formation at higher temperatures. The seeds provide pre-formed crystal structures that guide the crystallization process, eliminating the need for extreme cooling temperatures while maintaining crystallization efficiency
Solution Approach 2:
Phosphoric acid seeds act as intermediaries that facilitate crystallization at manageable temperatures. The seeds serve as nucleation sites that enable crystal growth without requiring the system to cool to 40°C or below, thus reducing energy consumption and process complexity
3Productivity
If impurities are trapped inside phosphoric acid crystals during crystallization, then crystal formation is faster, but purity decreases
Solution Approach 1:
The patent applies local quality control by maintaining specific temperature conditions (above 20°C) during different stages of crystallization. This temperature control creates local environmental differences that prevent impurity incorporation into crystals while allowing rapid crystal formation, achieving both high purity and high productivity
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
Economically produces high-purity phosphoric acid with reduced impurities, particularly Al, K, and Cu, suitable for semiconductor manufacturing, by controlling crystal growth and removing trapped impurities through temperature and quantum behavior manipulation.
Implementation Method 1
using a temperature difference between an introduced phosphoric acid raw material and a cooling device
Implementation Method 2
forming phosphoric acid crystals by stirring the introduced phosphoric acid raw material and the phosphoric acid seed
Implementation Method 3
controlling nucleation and crystal growth rates of crystals
Implementation Method 4
melting some of the formed phosphoric acid crystals through additionally introducing a high-temperature phosphoric acid raw material
Implementation Method 5
separating impurities from a phosphoric acid raw material containing a lot of impurities
Data Source
AI summary
The present disclosure relates to a method for producing high-purity phosphoric acid through a quantum behavior control, and more particularly, to a method for producing high-purity phosphoric acid capable of obtaining high-purity phosphoric acid from low-grade phosphoric acid economically and industrially by obtaining phosphoric acid crystals by, using a temperature difference between an introduced phosphoric acid raw material and a cooling device, controlling crystal growth position and rate of the phosphoric acid crystals through changes in the molecular or quantum behaviors of phosphoric acid, water molecules and impurities in the phosphoric acid raw material to suppress a phenomenon of impurities being trapped inside the phosphoric acid crystals, and melting some of the formed phosphoric acid crystals through additionally introducing a high-temperature phosphoric acid raw material to remove the impurities trapped inside the crystals.