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Title:
IRON PHOSPHATE PRECURSOR, PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2022/267420
Kind Code:
A1
Abstract:
Disclosed in the present invention are an iron phosphate precursor, a preparation method therefor, and the use thereof. The method for preparing the iron phosphate comprises the following steps: mixing and dissolving an iron source and a phosphorus source, adding a precipitation promoter, and stirring same to obtain molten metal; reacting by heating the molten metal, and filtering same to obtain an iron phosphate precipitate; pulping, filtering, washing, grinding, washing again and filtering the iron phosphate precipitate to obtain an iron phosphate dihydrate precipitate; and calcining the iron phosphate dihydrate precipitate to obtain an anhydrous iron phosphate. According to the present invention, in a sulphate-containing system, by means of selecting a phosphorus source and an iron source and then adding a precipitation promoter, heterogeneous precipitation occurs in the system. The heterogeneous precipitation is beneficial for the rapid growth of iron phosphate, and thus by-products of sulphates cannot be wrapped and precipitated in a timely manner, such that iron phosphate dihydrate which is loosely stacked in a sheet shape is obtained.

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Inventors:
LI LING (CN)
LI CHANGDONG (CN)
RUAN DINGSHAN (CN)
TANG SHENGHE (CN)
QIN CUNPENG (CN)
YIN LEI (CN)
Application Number:
PCT/CN2021/142946
Publication Date:
December 29, 2022
Filing Date:
December 30, 2021
Export Citation:
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Assignee:
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP VEHICLES RECYCLING CO LTD (CN)
International Classes:
C01B25/37; H01M4/58; H01M10/0525
Foreign References:
CN113353907A2021-09-07
CN112645299A2021-04-13
CN112624077A2021-04-09
CN112499609A2021-03-16
CN105185993A2015-12-23
CN106829907A2017-06-13
JP2014065641A2014-04-17
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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