TH2598A - Process for producing aluminum fluoride - Google Patents

Abstract

This invention is about the process of producing aluminum. Fluoride from aluminum hydroxide and hydrogen fluoride using a circulating fluidired system with a flow reactor with a cyclone separator. (The rotating gas in the middle has low air pressure) and has a recirculation tube back to the machine

Claims (4)

1. Process for producing aluminum Fluoride from aluminum hydroxide or alumina hydrate and hydrogen fluoride in circulating flow systems. Which includes a moving reactor Cyclone separator And circulation pipes Which processes are unique in that the aluminum Partially reacted hydroxides are recycled through a cooling cycle. Then add mixed into the aluminum Hydroxide or new alumina hydrate in the first karma step Method, in which aluminum hydroxide is mixed with hydrogen-containing waste gas Fluoride released by the circulating flow system To form a solid in-gas suspension at 150 to 250 ° C and then separate the solids from the gas line. Then at least part of the collected solids is passed through the coolers. The cooled solids are then mixed with aluminum hydroxide or alumina hydrate, and another part of the collected solids is sent to a recirculation system to react there at temperature. At least 450 degrees Celsius with hydrogen Fluoride is fed as a gas with a concentration of up to 25% by volume. 2. The process as described in claim 1 is unique in that all solids are extracted from suspended solids in that gas. Will be passed into the cooler 3. The process as described in claim 1 or 2 is characterized by the fact that the reaction within the circulating flow system is performed at a temperature of 500 to 600 ° C. 4. Process as mentioned in Clause 1, 2 or 3, any one It is unique in that the solids that are fed into the cyclonic flow system are fed through the flue gas of the recirculation system. And through the separator installed