METHOD OF PROCESSING MIXTURE OF NITRIC ACID AND NITRIC OXIDES AND APPARATUS FOR REALIZATION OF THIS METHOD Russian patent published in 2005 - IPC

FIELD: method of processing mixtures of nitric acid and nitric oxides containing corrosion inhibitors, mainly oxidizers of liquid rocket propellants.

SUBSTANCE: proposed method is used for processing oxidizers of liquid propellants inhibited with hydrogen fluoride; proposed method consists in treatment with granulated silica gel by keeping it in suspended state in apparatus by means of flow of acid mixture which is repeatedly circulated through suspended layer of silica gel with the aid of mixing unit at circulation ratio of 6-10 times per minute without direct contact of silica gel with mixing unit. Apparatus proposed for realization of this method has housing with water jacket, cover with circulating pipe and mixing unit placed in circulating pipe and mounted on shaft of drive. Mixing unit is made in form of impeller of axial-flow pump; circulating pipe is provided with flow-through ports above impeller of axial-flow pump; flow section of these ports exceeds sections of circulating pipe; flow-through ports and outlet hole of pipe are covered with screen.

EFFECT: improved quality of cleaning oxidizers; increased productivity of process.

3 cl, 1 dwg