Table of Contents
- 1 How do you choose a solvent for liquid-liquid extraction?
- 2 What is the main consideration in selecting a suitable solvent for extraction?
- 3 What are the two types of liquid-liquid extraction?
- 4 What are the main principles of liquid-liquid extraction?
- 5 What is the basic principle of solvent extraction?
How do you choose a solvent for liquid-liquid extraction?
—- Here is the general rule: The more polar the organic solvent, the more it is miscible (soluble) with water. For example, polar solvents such as methanol, ethanol and acetone are miscible with water, thus not suitable for liquid-liquid extraction.
What is the main consideration in selecting a suitable solvent for extraction?
The solvent should be stable chemically and inert toward the other components of the system and toward the common materials of construction. These should be low for ease in handling and storage, for example, a high viscosity leads to difficulties with pumping , dispersion and mass-transfer rate.
What are some things to consider when choosing a extraction solvent?
The following factors should be considered when selecting a solvent for commercial uses:
- solvent power (selectivity);
- polarity;
- boiling temperature – this should be low in order to facilitate removal of the solvent from the product;
- latent heat of vaporization;
What are the important factors to consider in choosing the solvent in the separation and purification of organic compounds?
Other Factors to Consider When Choosing a Solvent System There are two other factors to consider: price and boiling point. If two solvent systems give similarly good separation, the cheapest of the non-halogenated solvents should be used. Typically, this will result in a hexanes:ethyl acetate mixture.
What are the two types of liquid-liquid extraction?
What are the two types of liquid-liquid extractions? Describe each type. – Natural and Acid/base extraction are the two types of extractions. Acid-base extraction is a procedure using sequential liquid–liquid extractions to purify acids and bases from mixtures based on their chemical properties. …
What are the main principles of liquid-liquid extraction?
Liquid–liquid extraction (LLE) is based on the principle that a solute or an analyte can distribute itself in a certain ratio between two immiscible solvents, usually water (aqueous phase) and organic solvent (organic phase).
What makes a good solvent for recrystallization?
Characteristics of a Good Recrystallization Solvent: The recrystallization solvent should NOT dissolve the substance to be purified at room temperature, but it should dissolve it well at the solvent’s boiling point 2. The solvent should dissolve soluble impurities well at room temperature.
How do you choose the right solvent?
A pair of solvents is chosen: one in which the compound is soluble (called the “soluble solvent”), and one in which the compound is insoluble (called the “insoluble solvent”). The two solvents must be miscible in one another so that their solubility with one another does not limit the proportions used.
What is the basic principle of solvent extraction?
The principle behind solvent extraction is extremely basic. The goal is to use a liquid (solvent) to dissolve (solvate) a target molecule or group of compounds (solute) and to wash them out of the solid plant material. The solvent is then separated from the solute in order to concentrate the solute.