Diatomaceous Earth Purification Retaining Colloidal Structure
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Solution Overview
Problem
Existing methods for purifying diatomaceous earth for pharmaceutical use damage its natural structure, compromising its superior compressibility properties while achieving chemical purity, which is essential for bioavailability and stability of active ingredients.
Innovation Solution
A method involving acidic or oxidative treatment, separation, and controlled heating without calcination, using ultrasonic irradiation and specific acid and oxidizing agents, to maintain the natural colloidal structure and enhance chemical purity of diatomaceous earth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If calcination is used to purify diatomaceous earth, then chemical purity is improved, but the natural colloidal structure is destroyed
Solution Approach 1:
The patent changes the temperature parameter from high-temperature calcination (900-1100°C) to low-temperature treatment (below 300°C), which allows purification while preserving the natural colloidal structure of diatomaceous earth. This parameter change resolves the contradiction by finding a temperature window that achieves sufficient purification without structural damage.
Solution Approach 2:
The patent replaces the thermal-mechanical calcination process with a chemical treatment process using acids and oxidizing agents. This substitution allows purification through chemical reactions rather than thermal decomposition, thereby preserving the physical structure while achieving the desired chemical purity.
2Object-generated harmful factors
If high temperature heat treatment is applied, then volatile impurities are removed, but the pore structure is damaged
Solution Approach 1:
The patent changes the temperature parameter from high-temperature heat treatment to low-temperature treatment combined with chemical agents. This allows removal of impurities through chemical reactions at temperatures that do not compromise the pore structure integrity.
Solution Approach 2:
The patent introduces acid and oxidizing agent intermediaries that facilitate impurity removal at low temperatures. These chemical intermediaries enable the removal of volatile and non-volatile impurities without requiring high temperatures that would damage the pore structure.
3Manufacturing precision
If traditional purification methods are used, then chemical purity is achieved, but compressibility properties deteriorate
Solution Approach 1:
The patent changes the processing temperature parameter to below 300°C, which preserves the compressibility properties of diatomaceous earth while still achieving adequate chemical purity through the use of acid and oxidizing agent treatments.
Solution Approach 2:
The patent replaces high-temperature thermal processing with chemical processing using acids and oxidizing agents. This substitution achieves purification without the mechanical stress and thermal damage that would compromise compressibility properties.
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
Retains the natural structure and achieves higher chemical purity than traditional methods, ensuring superior compressibility and purity suitable for pharmaceutical applications.
Implementation Method 1
separating diatomaceous earth from said suspension optionally by applying ultrasonic irradiation
Implementation Method 2
treating the separated diatomaceous earth with an organic or inorganic acid optionally by applying simultaneous ultrasonic irradiation
Implementation Method 3
treating the separated diatomaceous earth with an organic or inorganic acid
Implementation Method 4
purifying the heat-treated diatomaceous earth by oxidative treatment
Implementation Method 5
heating the thus obtained diatomaceous earth at a temperature not higher than 300°C
Implementation Method 6
drying the purified diatomaceous earth product
Data Source
AI summary
The present invention is related to a method for purifying diatomaceous earth wherein the natural colloidal structure of the material is retained, which comprises preparing a suspension of diatomaceous earth in a liquid wherein diatomaceous earth is insoluble, separating diatomaceous earth from the suspension, treating diatomaceous earth with an inorganic or organic acid, heat-treating the thus obtained product at a temperature not higher than 300°C, subjecting the product obtained to oxidative treatment and drying the purified product. The invention also relates to a product obtainable by the above-mentioned method.