Method for improving yield of urea phosphate prepared from wet-process phosphoric acid
The invention discloses a method for improving the yield of urea phosphate prepared from wet-process phosphoric acid, which comprises the following steps: mixing a crystallization promoting agent with wet-process phosphoric acid and urea, reacting, cooling, crystallizing, filtering and drying to obt...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention discloses a method for improving the yield of urea phosphate prepared from wet-process phosphoric acid, which comprises the following steps: mixing a crystallization promoting agent with wet-process phosphoric acid and urea, reacting, cooling, crystallizing, filtering and drying to obtain urea phosphate after the reaction is finished, or mixing wet-process phosphoric acid with urea for reaction, adding a crystallization promoter or a crystallization promoter-containing urea phosphate mother solution after the reaction is finished, cooling, crystallizing, filtering and drying to obtain the urea phosphate. The crystallization promoting agent is one or a mixture of more than two of ethylene glycol monomethyl ether, ethylenediaminetetraacetic acid and citric acid in any proportion. The urea phosphate produced by the method disclosed by the invention is crystal particles, reaches the industrial urea phosphate standard (GB/T27805-2011), can meet the market demand, and is low in cost, flexible in addin |
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