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Применить Всего найдено 2. Отображено 2.
18-07-2023 дата публикации

Iron phosphate as well as preparation method and application thereof

Номер: CN116443835A
Автор: WU PENGSEN, YAN MING, ZHOU DAQIAO, KIM SUN-YONG, DOU JUN, REN MINGMING
Принадлежит:

The invention relates to iron phosphate as well as a preparation method and application thereof. The method comprises the following steps: calcining a mixture of pyrite and sulfur to obtain gas A1 and a reactant A2; dissolving the gas A1 in water, and introducing oxygen to obtain a solution C; adding iron powder and the solution C into the reactant A2, and reacting to obtain a solution D; uniformly mixing phosphorite and the solution C, and carrying out first solid-liquid separation to obtain filtrate E1 and a filter cake F; adding an extracting agent into the filtrate E1, and then carrying out first washing, first purification and second solid-liquid separation to obtain filtrate E2; adding ammonia water into the filtrate E2 to obtain an ammonium dihydrogen phosphate solution; adding hydrogen peroxide and ammonia water into the ammonium dihydrogen phosphate solution to obtain a solution G; the solution G and the solution D are mixed and then subjected to a stirring reaction, heating aging ...

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Номер записи: 1
07-07-2023 дата публикации

Lithium manganese iron phosphate precursor and preparation method of lithium manganese iron phosphate

Номер: CN116395663A
Автор: WU PENGSEN, YAN MING, ZHOU DAQIAO, LI ZIJIN, WANG JING, YOON SUNG OK
Принадлежит:

The invention relates to a lithium manganese iron phosphate precursor and a preparation method of the lithium manganese iron phosphate, and the preparation method of the lithium manganese iron phosphate precursor comprises the following steps: 1) preparing iron phosphate from ferrous sulfate which is a sulfate process titanium dioxide byproduct, separating out mother liquor, and carrying out membrane treatment and MVR concentration treatment on the mother liquor to obtain a first solution; 2) removing impurities from the sulfate process titanium dioxide by-product ferrous sulfate to obtain a second solution; 3) mixing the first solution and the second solution to obtain a mixed salt solution; and 4) simultaneously dropwise adding the mixed salt solution and the ammonium phosphate salt solution into a reactor under an inert atmosphere condition for reaction, controlling the pH value of the solution in the reactor to be 5-6, controlling the reaction temperature to be 50-80 DEG C, and performing ...

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Номер записи: 2