Method for preparing columnar large-particle monopotassium phosphate through wet-process phosphoric acid chelation
The invention discloses a method for preparing columnar large-particle monopotassium phosphate by wet-process phosphoric acid chelation, which comprises the following steps: adding a chelating agent into wet-process phosphoric acid, a potassium hydroxide solution, a mixture of the wet-process phosph...
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| creator | LIU PENGFEI HUAQUAN COUNTY CHEN XIANG WANG BAOMING TANG JIANWEI LIU YONG LIU YEHAO LIU XU |
| description | The invention discloses a method for preparing columnar large-particle monopotassium phosphate by wet-process phosphoric acid chelation, which comprises the following steps: adding a chelating agent into wet-process phosphoric acid, a potassium hydroxide solution, a mixture of the wet-process phosphoric acid and the potassium hydroxide solution or a monopotassium phosphate crystallization mother liquor, and after the reaction is finished, performing primary filtration and concentration to obtain a concentrated solution; and performing cooling crystallization, secondary filtration and drying to obtain the product. The chelating agent is a mixture of one or more than two of diethylene triamine pentaacetic acid, nitrilotriacetic acid and sodium gluconate in any proportion, and the addition amount of the chelating agent is 0.15%-5% of the mass of the concentrated solution. The produced monopotassium phosphate product is in a uniform columnar large particle shape, reaches the fertilizer-grade monopotassium phospha |
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The chelating agent is a mixture of one or more than two of diethylene triamine pentaacetic acid, nitrilotriacetic acid and sodium gluconate in any proportion, and the addition amount of the chelating agent is 0.15%-5% of the mass of the concentrated solution. 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The chelating agent is a mixture of one or more than two of diethylene triamine pentaacetic acid, nitrilotriacetic acid and sodium gluconate in any proportion, and the addition amount of the chelating agent is 0.15%-5% of the mass of the concentrated solution. 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The chelating agent is a mixture of one or more than two of diethylene triamine pentaacetic acid, nitrilotriacetic acid and sodium gluconate in any proportion, and the addition amount of the chelating agent is 0.15%-5% of the mass of the concentrated solution. The produced monopotassium phosphate product is in a uniform columnar large particle shape, reaches the fertilizer-grade monopotassium phospha</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY COMPOUNDS THEREOF INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS |
| title | Method for preparing columnar large-particle monopotassium phosphate through wet-process phosphoric acid chelation |
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