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Leaching is one of many solid-fluid separation processes that are carried out in

the chemical, mineral and related industries. In fact, it is one of the oldest unit

operations in the chemical industries. The fundamental principle behind leaching

is the removal of a soluble material from an insoluble, permeable solid phase. The

soluble fraction, solid or liquid, may exist mechanically in the pore structure of

the insoluble material or chemically combined with that material. This soluble

material is removed through dissolution in a dissolving solvent. The most familiar

example of leaching is the extraction of tea and coffee, and most importantly

mineral recovery.

The rate of leaching (extraction) is affected by many physical and chemical phenomena. Mass transfer and equilibriumphenomena obviously playmajor roles. The process of leaching consists of the following steps: (i) The solvent diffuses into the solid phase; (ii) The diffused solvent dissolves the solutes (i.e. transfer the solute to the liquid phase). Leaching is always followed by solvent recovery, which involves another mass transfer operation; such as filtration.

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What is the principle involved in extraction?

Extraction is based on the principle of transferring a substance from one phase to another, typically from a solid or liquid phase to a liquid phase. This is achieved by using a solvent that selectively dissolves the desired substance while leaving impurities behind. The goal of extraction is to separate the desired compound from a mixture.


What is the definition of back extraction?

Back extraction is a process in chemistry where a substance is removed from a solvent it was previously dissolved in, typically using a different solvent.


Why repeated extraction is better than solvent extraction?

Repeated extraction allows for greater efficiency in extracting desired components from a given sample due to the cumulative effect of multiple extraction cycles. This method ensures that more of the target compounds are effectively removed, leading to higher overall extraction yields compared to a single solvent extraction. Additionally, repeated extraction can help to overcome limitations such as incomplete extraction or low solubility that may be encountered with a single extraction.


Discussions and conclusion in solvent extraction?

In discussions, the results and findings of the solvent extraction experiment are analyzed and compared to the expected outcomes. The limitations of the study and potential sources of error are also addressed. In the conclusion, the key findings of the experiment and their implications are summarized. Recommendations for future research or practical applications of the solvent extraction process may also be provided.


What is the primary function of the solvent extraction in Metallurgy extractive industry?

The primary function of solvent extraction in the metallurgical extractive industry is to selectively separate and concentrate specific metals or minerals from a solution. This process allows for the extraction of valuable metals from ores or solutions by using a solvent that can selectively dissolve the desired metal, separating it from impurities.

Related Questions

What principle is the process of extraction based?

The process of extraction is based on the principle of separating a desired compound from a mixture by using a solvent that selectively dissolves the compound of interest. This is achieved by taking advantage of differences in solubility between the desired compound and the rest of the mixture.


What is the principle involved in extraction?

Extraction is based on the principle of transferring a substance from one phase to another, typically from a solid or liquid phase to a liquid phase. This is achieved by using a solvent that selectively dissolves the desired substance while leaving impurities behind. The goal of extraction is to separate the desired compound from a mixture.


How do you extract pigments?

hot water extraction , aqueous extraction, solvent extraction


How do you extract microbial pigments?

hot water extraction , aqueous extraction, solvent extraction


What is the definition of back extraction?

Back extraction is a process in chemistry where a substance is removed from a solvent it was previously dissolved in, typically using a different solvent.


Is solvent extraction extraction a type of chromatography?

Solvent extraction is not a type of chromatography. Solvent extraction involves the separation of compounds based on their solubility in different solvents, while chromatography separates compounds based on their interactions with a stationary phase and a mobile phase.


What is The best solvent for extraction?

Pivalic Acid


Why repeated extraction is better than solvent extraction?

Repeated extraction allows for greater efficiency in extracting desired components from a given sample due to the cumulative effect of multiple extraction cycles. This method ensures that more of the target compounds are effectively removed, leading to higher overall extraction yields compared to a single solvent extraction. Additionally, repeated extraction can help to overcome limitations such as incomplete extraction or low solubility that may be encountered with a single extraction.


What is a material that separates the compounds in mixture is?

You think probable to a solvent for the solvent extraction method.


Why is density important to consider in the selection of an extraction solvent?

Density is important in selecting an extraction solvent because it affects the efficiency of the extraction process. A solvent with a similar density to the target compound will result in better extraction yields due to reduced mixing and phase separation issues. Additionally, density influences the ease of solvent recovery and recycling in the extraction process.


Discussions and conclusion in solvent extraction?

In discussions, the results and findings of the solvent extraction experiment are analyzed and compared to the expected outcomes. The limitations of the study and potential sources of error are also addressed. In the conclusion, the key findings of the experiment and their implications are summarized. Recommendations for future research or practical applications of the solvent extraction process may also be provided.


What is extraction method of separating?

Extraction is a method of separating a desired compound from a mixture by dissolving the compound in a solvent that selectively extracts it from the mixture. The mixture is then usually shaken or agitated to allow for complete mixing of the solvent and the compound of interest. The compound is then separated from the solvent through techniques such as filtration or evaporation.