INVESTIGATION OF THE ABSORPTION OF NITROUS GASES BY ORGANIC ABSORBERS IN THE PRODUCTION OF WEAK NITRIC ACID

Abstract

The article presents the results of a study of the process of absorption of nitrosic gases by tributyl phosphate in the production of weak nitric acid. To study the kinetics balance of nitrogen oxides in a gas-liquid system at low pressure pressure, we used the option when the continuous gas flow through a stable liquid layer is until saturation, that is, until the gas concentration at the outlet reaches the initial concentration. Tributyl phosphate of the "T" brand was used as an absorbent, pre-purified by vacuum distillation at atmospheric pressure and washed with 4% sodium hydroxide solution and distilled water. The study included: analysis of the kinetic characteristics of the absorption process optimization of the parameters of the gas-liquid system evaluation of the efficiency of Purification with Tributyl phosphate development of recommendations for the industrial application of the method the results show the prospect of using tributyl phosphate for the purification of nitrosic gases and can be used to improve technological processes in the production of nitric acid. The study makes a significant contribution to solving the urgent problem of reducing nitrogen oxides emissions in the chemical industry.