NOVELTY - Continuous production of hydroxylamine, comprises: (a) feeding hydrogen-containing gas, phosphate-containing acidic aqueous solution and nitrate or nitrogen monoxide dissolved in the phosphate-containing acidic aqueous solution to hydroxylamine formation zone; (b) reducing nitrate or nitrogen monoxide with hydrogen to form hydroxylamine; (c) removing hydroxylamine from the phosphate-containing acidic aqueous solution; (d) adding to the phosphate-containing acidic aqueous solution nitrous gases and/or nitrate; and (e) returning the aqueous solution to the hydroxylamine formation zone.    USE - The process is useful for continuous production of hydroxylamine and fertilizer product (claimed).    ADVANTAGE - The process reduces the concentration of molybdenum in the phosphate-containing acidic aqueous solution, thus improving the selectivity of the reaction towards the formation of hydroxylamine; reduces the raw material consumption (nitrate and/or nitrous gases and hydrogen) and energy consumption, hence environmentally friendly; and removes other unwanted components from the acidic aqueous solution of phosphate ions, thus improving the efficiency.    DETAILED DESCRIPTION - Continuous production of hydroxylamine, comprises: feeding hydrogen-containing gas, phosphate-containing acidic aqueous solution and nitrate or nitrogen monoxide dissolved in the phosphate-containing acidic aqueous solution to a hydroxylamine formation zone; reducing, in the hydroxylamine formation zone, nitrate or nitrogen monoxide with hydrogen to form hydroxylamine; removing hydroxylamine from the phosphate-containing acidic aqueous solution, in a hydroxylamine removal zone; adding to the phosphate-containing acidic aqueous solution nitrous gases and/or nitrate; and returning to the hydroxylamine formation zone the phosphate-containing acidic aqueous solution, where a portion of the phosphate-containing acidic aqueous solution is removed, and phosphoric acid is added to the remaining phosphate-containing acidic aqueous solution. An INDEPENDENT CLAIM is also included for a fertilizer product comprising a phosphate-containing acidic aqueous solution, obtainable by the process, which is neutralized by reaction with ammonia.