Yield:4861-19-2 1327.8 g

Reaction Conditions:

with phosphoric acid at 40; under 3750.38 Torr;Industrial scale;

Steps:

2
1000 g of phosphoric acid at a concentration of 85% was weighed to 140 ° C.Weigh all 521g of urea in a sealed container with a stirrer and vacuum system,Start the mixing device,Close the phosphoric acid feed valve,Open the vacuum valve and vacuum suction system,Adjust the vacuum to 0.5Mpa.Open the phosphoric acid feed valve and control the feed rate to close the valve by adding the pre-heated phosphoric acid.Maintain the reactor vacuum and stirring conditions until the bottom of the reactor material temperature below 40 , to stop stirring and vacuum, remove the product to be measured, the product 1327.8g, the detection of water products in the 0.2%.By comparison, it can be seen that the finished product is significantly lower than the total amount of dry matter in the reactants, and it is proved that the phosphoric acid is decomposed under the condition of the temperature of the phosphoric acid to form the ammonium phosphate and the carbon dioxide gas

References:

YunnanJianglin Group co., LTD;MA, XING LIANG;WANG, BIN;WAN, RONG HUI;ZHANG, ER BAO CN104003909, 2016, B Location in patent:Paragraph 0047; 0048

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