Method for preparing iron oxide based on negative pressure regulation of gaseous ferric chloride
By controlling the temperature at 700-750℃ and using an 8-12 mmH2O negative pressure condition during the preparation of iron oxide from gas-phase ferric chloride, combined with precise negative pressure control and graded collection, the problems of low iron oxide product yield and chlorine residue were solved, resulting in high-yield and high-purity iron oxide products.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUNAN FORTUNE ENVIRONMENTAL TECH CO LTD
- Filing Date
- 2026-05-29
- Publication Date
- 2026-07-14
AI Technical Summary
In the existing gas-phase oxidation method for preparing iron oxide, the yield of iron oxide product is low, and there are problems such as incomplete oxidation and chlorine residue. This is mainly due to the unreasonable setting of the negative pressure parameter of the reaction system, which leads to insufficient contact between gas-phase ferric chloride and oxygen or the iron oxide product being entrained by the gas flow.
The oxidation reaction was carried out at a temperature of 700-750℃ and a negative pressure of 8-12 mmH2O. The negative pressure was controlled with a precision of ±0.5 mmH2O. The iron oxide product was collected using a staged collection device and then dechlorinated. The gas flow field and residence time of the reaction system were optimized.
It significantly increases the yield of iron oxide products to 100%, reduces chlorine residue, improves product morphology uniformity, inhibits side reactions and impurity generation, and ensures gas-solid separation efficiency.
Smart Images
Figure CN122380451A_ABST