METHOD FOR PREPARING HYDROXYLAMINE

摘要

The invention relates to a method for preparing hydroxylamine in a continuous process, comprising feeding nitrate and phosphate in an acidic aqueous liquid into a reaction zone and reducing nitrate with hydrogen thereby forming hydroxylamine, wherein the nitrate concentration in the reaction zone is less than 1.0 mol/kg, as determined in the liquid leaving the reaction zone, wherein the molar ratio of nitrate to phosphate in the reaction zone is 0.5 or less, and wherein the molar ratio of ammonia to nitrate is in the range of from 2.2 to 7; a method for preparing an oxime and a method of preparing a lactam comprising said method for preparing hydroxylamine.