A kind of method of the cyanide complex of low-temperature catalytic pyrolysis iron

A low-temperature catalysis and complex technology, applied in the direction of protection devices against harmful chemicals, etc., can solve the problems of lack of economical and effective treatment methods, and achieve the effects of less equipment investment, avoiding pollution and simple process
CN110102007BActive Publication Date: 2021-07-27NORTHEASTERN UNIV LIAONING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHEASTERN UNIV LIAONING
Publication Date
2021-07-27

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Abstract

A method for low-temperature catalytic pyrolysis of iron cyanide complexes of the present invention, the steps are: adding a catalyst to raw materials, the raw materials being solid iron cyanide complexes or soil or waste residue of iron-containing cyanide complexes , mixed evenly to make a mixed raw material; put the mixed raw material into a pyrolysis device, heat it to 300-550°C for catalytic thermal decomposition, and when the temperature reaches 300-550°C, keep it warm for 0-180min to remove iron cyanide The compound is obtained from pyrolysis slag, which can be directly stockpiled or used for backfill treatment. The beneficial effects of the present invention are: through low-temperature thermal decomposition, oxidizing atmosphere and the action of a catalyst, the clean conversion of solid iron cyanide complexes or iron-containing cyanide complexes is realized, and the iron cyanide complexes are oxidized into The invention has no toxic compound, low cost and good effect of removing iron cyanide complexes, and the removal rate of iron cyanide complexes reaches over 99%. The invention has simple process, less equipment investment, no secondary pollution and is easy to popularize.
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Description

technical field

[0001] The invention belongs to the field of environmental protection, in particular to a method for catalyzing and pyrolyzing iron cyanide complexes at low temperature. Background technique

[0002] The cyanide complexes of iron mainly include ferricyanide and ferrocyanide, which are very stable in chemical properties at normal temperature and pressure, and Fe can hardly be detected in the solution. 2+ / Fe 3+ 、CN - Ions are difficult to be biochemically oxidized and removed by ordinary chemical oxidation methods. From the perspective of polluting the environment, ferricyanide and ferrocyanide are less toxic, but heating for a long time, especially under light conditions, can easily lead to hydration reactions to produce [Fe(CN)·HO] and highly toxic hydrogen cyanide (HCN), and once ferricyanide and ferrocyanide enter the complex solution, if they encounter humic acid and polypeptide ions with stronger complexing ability than iron ions, they will release hi...

Claims

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