P507 extractant is an organic phosphorus extractant, an oily organic phosphorus compound, which can chelate metal ions or salts (see chelation) or coordinate (see coordination compound). Common organic phosphorus extractants (see solvent extraction) can be divided into three categories: neutral dolls, acid dolls and double coordination dolls.

P507 extractant is used in hydrometallurgy, nuclear energy industry, environmental science and other fields, and plays an important role in metal extraction. Organic phosphorus extractants are divided into neutral phosphorus extractants and acid phosphorus extractants. They all have the advantages of good extraction performance, high selectivity, low acceptance and easy back extraction. Tributyl phosphate (TBP) has a strong ability to extract uranium, which can be used for uranium recovery in the reprocessing of ores and uranium fuel. With the rapid development of hydrometallurgy and the improvement of people's environmental awareness, the research on the synthesis of high-quality organic phosphorus extractants and the clean production process have also been developed rapidly, and many important achievements have been made in recent years. What are the advantages of P507 extractant?

A solvent that is insoluble in the original solution.

The solubility of the solute is much higher than that of the original solvent.

Not volatile.

P507 extractant cannot react with the solvent of the original solution. Common extractants for separating funnel extraction: benzene, alcohol, kerosene, straight chain gasoline, ethane and cyclohexane. Don't forget that water is a cheap and easily available extractant.

Compared with other solution group separation methods, P507 extractant has the advantages of normal temperature operation, energy saving, solid, gas and convenient operation. The extraction is applicable to the following situations and is usually beneficial.

What is the selection principle of P507 extractant?

The boiling points of each group of feed liquids are similar, and even the formation of azeotropes, such as the separation and direction angle of methane gas in petroleum fractions, and the dephenolization of coal tar, are not easy to correct.

Low concentration hump group is separated and rectified, which consumes large energy. Such as thin oxalic acid dehydration.

In the separation of mineral leachate and various ions such as detergents, if chemical substances are separated and precipitated, not only the separation quality will decline, but also the filtering work will cause great losses.

Separation of unstable substances (e.g. penicillin) from the fermentation broth. The extracted application is still under development. Most of the elements in the periodic table can be separated by extraction. The selection and development of extractants, the determination of process and operating conditions, and the design and calculation of process and equipment are the themes of development and extraction operations.

The above extractants are mainly physical extractants. At present, chemical extractants are widely used in industry, especially in metallurgical industry, which are used in groceries, purification, separation, product preparation, etc.

Most industrial extractants are soluble in organic solvents, and the common organic solvent is sulfonated kerosene. Because it is cheap and easy to get, it has synergistic effect on extractants. Because it contains a small amount of aromatic hydrocarbons. Soluble in organic solvent can improve the extraction ability of extractants, enhance the solubility of metal extracts, reduce viscosity, reduce volatile energy, and reduce the solubility in water.

P507 extractant is mainly used in the hydrometallurgical industry of copper, zinc, cobalt nickel, cadmium, gold, silver, platinum group metals, rare earth and other non-ferrous metals.

Organophosphorus extractants are used for the extraction and separation of nuclear fuel, the enrichment of rare metals, precious metals and non-ferrous metals, the purification of industrial wastewater, and the extraction and separation of organic acids and bases.