The conditions for the synthesis of hydroxylamine by reaction of hydrogen and nitric oxide in aqueous sulfuric acid in a cascade reactor system composed of three-phase mixing reactors in the presence of a platinum-on-electrographite catalyst, have been analyzed. The factors that provide the explosion safety of the process have been studied, such as pressure, H2 : NO ratio, and N2O content in the gaseous synthesis products. The design of the reactors, which enables the explosion safety of the process, is described. An algorithm for the process control is proposed. Data on the composition of the gas phase mixture entering the reactors for hydroxylamine sulfate (HS) synthesis, the composition of the gaseous products of HS synthesis, along with the industrial scale HS synthesis conditions and outcomes are presented. The proposed solution for the control the catalytic synthesis of hydroxylamine sulfate makes it possible to a great extent simplify the process management by creating a simple and understandable algorithm together with maintaining an explosion-proof NO concentration in the synthesis gas. It also provides the opportunity to analyze the N2O content in the gaseous synthesis products, to evaluate the operation stability of the reactor unit and the necessity of the catalyst replacement and shutdown of the reactor system when required. Additional introduction of the required amount of nitric oxide directly into the cascade reactors without the contact with synthesis gas and hydrogen further improves the explosion safety of the entire process.
This work is licensed under a Creative Commons Attribution 4.0 International License.
Copyright (c) 2022 Industrial processes and technologies