Preparation process of high-concentration hydrochloric acid

• Main Authors: GAO XIMING, DAI YIJU, XIANG YUANSHU, LIU YUHAI
• Format: Patent
• Language: Chinese; English
• Published: 06.08.2021
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS

The invention discloses a preparation process of high-concentration hydrochloric acid. A Mannheim reaction furnace, a carbon cooler, at least six groups of HCL gas washing towers, at least eight groups of falling film absorption towers, two groups of HCL absorption fans and five groups of secondary washing towers are included. The multi-stage washing towers are additionally arranged, so that the concentration of solute in washing liquid is gradually increased, the viscosity is also gradually increased, the concentration of the washing liquid entering the spraying tower is lower than that of spraying waste liquid, and the viscosity of the spraying liquid is increased to a certain degree, and does not increase any more; and according to the process, the internal circulation flow of the washing liquid is increased, the viscosity of the washing liquid and the spraying liquid is improved, the washing efficiency is improved, the purity of hydrochloric acid collected in the later period is high, the process is low i