Method for preparing hydroxylamine
A hydroxylamine and hydrogen technology, applied in chemical instruments and methods, preparation of organic compounds, preparation of aminohydroxyl compounds, etc., can solve problems such as uneven distribution of feed hydrogen and obstruction of hydroxylamine concentration
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Embodiment 1
[0034] Using the reactor 10 as shown in Figure 2, through the pipeline 22 at 130M per hour 3 The aqueous reaction medium is fed to the hydroxylamine reactor at a flow rate of 0.04 mol / kg of hydroxylamine phosphate, 2.89 mol / kg of hydrogen ion, 2.46 mol / kg of phosphoric acid, and 0.26 mol / kg of free nitric acid. The circulating hydrogen system is introduced into the middle gas distributor 16 of the reactor 10 through the line 24, and the fresh hydrogen system is introduced into the bottom gas distributor 18 of the reactor 10 through the line 26. Under the conditions of a temperature of 53° C. and a hydrogen partial pressure of 55%, a 10% palladium / activated carbon catalyst is used for catalysis to synthesize hydroxylamine phosphate. In the phosphate inorganic treatment solution at the outlet of the hydroxylamine reactor, the synthesized hydroxylamine phosphate concentration is 1.15 mol / kg, the hydroxylamine selectivity is 85.5%, and the catalyst activity is 26.6 g hydroxylamine / hou...
Embodiment 2
[0036] Using the reactor 10 as shown in Figure 4, through the pipeline 22 at 130M per hour 3 The aqueous reaction medium is fed to the hydroxylamine reactor at a flow rate of 0.04 mol / kg of hydroxylamine phosphate, 2.89 mol / kg of hydrogen ion, 2.46 mol / kg of phosphoric acid, and 0.26 mol / kg of free nitric acid. The circulating hydrogen is introduced into the middle gas distributor 16 of the reactor 10 through the line 24, and the fresh hydrogen is introduced into the bottom gas distributor 18 and the upper gas distributor 20 of the reactor 10 through the lines 26 and 28. The bottom gas distributor 18 and the upper gas distributor 20 The ratio of fresh hydrogen in the gas distributor 20 is 2:1. Under the conditions of a temperature of 53° C. and a hydrogen partial pressure of 55%, a 10% palladium / activated carbon catalyst is used for catalysis to synthesize hydroxylamine phosphate. In the phosphate inorganic treatment solution at the outlet of the hydroxylamine reactor, the synthes...
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