Acidic Olive Oil Flotation Reagents for Phosphate Ore Separation
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Solution Overview
Problem
Current methods for beneficiating phosphate ores, particularly calcareous ores, face challenges due to similar physicochemical properties of minerals, leading to inefficient separation and high energy consumption in processes like calcination, and existing collectors are not selective enough, resulting in phosphate loss in tailings.
Innovation Solution
The use of flotation reagents derived from acidic olive oil through transesterification with methanol, producing highly selective collectors that separate carbonates from phosphates, reducing phosphate loss and improving the grade and yield of phosphate ores.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If calcination is used to upgrade calcareous phosphate ore, then carbonate gangue is removed, but energy consumption increases and product quality deteriorates
Solution Approach 1:
The patent replaces the thermal calcination process with a chemical flotation process using collectors derived from acidic olive oil. Instead of heating ore to 950°C to decompose carbonates, the invention uses selective chemical reagents to separate carbonate gangue from phosphate minerals through froth flotation, substituting mechanical/thermal energy with chemical selectivity
Solution Approach 2:
The patent changes the chemical parameters of the flotation process by using collectors with specific molecular structures derived from acidic olive oil transesterification. These collectors have optimized hydrophobicity and selectivity parameters that enable effective separation at ambient temperatures, avoiding the high-temperature calcination process
2Productivity
If conventional collectors are used in flotation, then phosphate recovery is achieved, but selectivity is insufficient and phosphate loss occurs
Solution Approach 1:
The patent applies local quality by designing collectors with specific functional groups that selectively interact with carbonate mineral surfaces. The collectors derived from acidic olive oil have tailored molecular structures with polar and non-polar regions that create localized chemical affinity for carbonate gangue while leaving phosphate minerals unaffected, achieving high selectivity at the mineral-solution interface
Solution Approach 2:
The patent uses composite collectors formed by combining different components from acidic olive oil processing, including esters and other fatty acid derivatives. This composite reagent system provides both the hydrophobicity needed for flotation and the specific chemical selectivity for carbonate minerals, overcoming the limitations of single-component conventional collectors
3Reliability
If calcination is used to remove carbonate gangue, then separation is achieved, but process complexity and cost increase
Solution Approach 1:
The patent extracts and utilizes valuable components from acidic olive oil waste stream to create flotation collectors. By taking out the fatty acid components and converting them to esters through transesterification, the invention creates a dual-benefit solution: waste valorization and effective reagent production, replacing the complex calcination process with a simpler biological/chemical approach
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 acidic olive oil-derived collectors enhance the selectivity and recovery of phosphate ores, achieving better grade and yield with reduced phosphate loss in the froth phase, and are suitable for various types of phosphate ores, including those previously challenging to process.
Implementation Method 1
A collector is one of the surfactants that selectively makes a target mineral hydrophobic
Implementation Method 2
the target mineral gets attached to a bubble
Implementation Method 3
the target mineral gets attached to a bubble, which rises to the top of the slurry
Data Source
AI summary
The flotation reagents from acidic olive oil are made by transesterification of acidic olive oil. Acidic olive oil is olive oil having an acid value high enough to render it unsuitable for consumption, typically greater than 3.3% and/or between 3.3-7%. Transesterification of the olive oil with methanol converts fatty acids in the olive oil to an ester fraction and a glycerol fraction. The ester fraction may be sulfonated and used as the collector in a reverse flotation process, selectively removing the carbonate gangue from phosphate-carbonate rock in the froth, leaving phosphates in the sink. The glycerol fraction may be used without modification as the collector in the reverse flotation process. Both fractions are highly selective for carbonates, substantially reducing loss of phosphates in the froth.