Lithium batteries can be divided into lithium iron phosph×ate battery, lithium manganate battery, lithium cobaltate battery, ternary lithium ba₹ttery, and so on, according to their different anode systems. With the decline of nationa★l subsidies for new energy vehicles, and taking the saf♥ety of lithium iron phosphate and the economy brought by long cycλle into consideration, its thermal run away temperature is much highe≤r, and its safety is also much higher. Therefore, under the cost control, its safety advanta∏ge also makes its demand rise.

Iron phosphate is a key precursor material of lithium i∑ron phosphate, its main process is to fully grind and mix iron phosphate precurαsor with lithium source and carbon source. Then carbon thermal reductπion method is used to produce the positive electrode mat∏erials  iron phosphate lithium. The quality of iron phospha‍te materials will largely determine the overall performa€nce of iron phosphate lithium positive electrode mate↓rials.

Enterprises in the market mainly produce iron phosphate by using ferrous sulfate and amm♥onium dihydrogen phosphate, the cost is relatively low and the raw materials are extremσely easy to obtain. Among them, iron source ferrous sulfate is mostly a b&y-product of waste produced in the production of titanium dioxide enterprises, while phosphoru✔s source ammonium dihydrogen phosphate is a raw mat"erial of agricultural phosphate fertilizer. But phosphoric acid nee$ds to be purified to obtain high-quality ammonium dihydrogen ph¶osphate.

At present, phosphoric acid is mainly produced by thermal process and wet proces s: Phosphoric acid produced by thermal process is mainly used in chemical industry and fαood industry, but its production process has high energy consumption, comp₩lex equipment and serious pollution. With the requirement of econo±mic development for energy conservation and environmental proteβction, the thermal process of high energy consumptΩion and high pollution phosphoric acid production process is gradually® replaced by the wet process of low energy consumption. The production of wet proc∏ess phosphoric acid accounts for about 85% ~ 90% of $total phosphoric acid production in the world. However, impurities lik&e fluorine, sulfur, iron, aluminum, magnesium, calcium and so on in raεw phosphate rock will enter into the finished phosp®horic acid during the production of wet process phosphoric  acid. So if high-quality phosphate products are to made from wet process phosphoric∑ acid, it is necessary to carry out deep purification treatment on impurity ions.&<nbsp;

The main methods of removing ions from wet process phosphoric acid are: solvent precipitatio±n, solvent extraction, ion exchange, cooling crystall↔ization, etc. Among which, solvent precipitation and solvent extraction need to add solvent, ∑which increase the treatment process steps and energy consumption o¶f solvent recovery. Ion exchange requires large amount of resin and the pro×duction cost is high. Cooling crystallization has a low product yield and req≠uires multiple crystallization to obtain high purity ph÷osphoric acid. Therefore, Guochu Technology successfully ÷developed a special technology for phosphoric acid purification. This technology uses na₹no-scale physical separation method to remove metal impurity ions without‌ phase conversion, thus reducing the operating timΩe, energy consumption and equipment area, and improving pσhosphoric acid purification efficiency. Most importantly, the operating costs are almost neg ligible.



Technical features and advantages:

1. Suitable for phosphoric acid purification with high acid concαentration and high ionic impurity content;
2. Heating and pressurization are not needed in the process of phosphoric acid purificatio n, which is safe and reliable, and has very low energy consum¶ption;
3. Both phosphoric acid recovery rate and concentration of recovered± phosphoric acid have advantages.

There are many kinds of impurities in wet process αphosphoric acid, and the quality requirements of feed grad★e, food grade and technical grade are different. Different purification methodΩs can be selected according to the actual demand. If a single p☆urification technology cannot meet the demand of phosphoric acid purity, two or mo&re purification technologies can be used to give play to the advantages of various puri☆fication technologies. In addition, with the development of• microelectronics industry, the demand of high purity electronic grade phosphoric acid≠ will be increasing.

Guochu Technology will also continue to explore new technologies of higher puritσy phosphoric acid purification. For more information, please call: +86-592-6518670