Method for reducing chlorine content in chlorine-containing organic waste liquid and method for treating chlorine-containing organic waste liquid

Abstract

The invention belongs to the field of organic waste liquid treatment, and relates to a method for reducing chlorine content in chlorine-containing organic waste liquid and a method for treating the chlorine-containing organic waste liquid. The method comprises the following steps: (1) mixing the chlorine-containing organic waste liquid with metal alkoxide for reaction; and (2) carrying out solid-liquid separation on the mixture obtained by the reaction in the step (1) to obtain the organic waste liquid with reduced chlorine content. Compared with the prior art that conventional alkaline compounds such as sodium hydroxide and calcium hydroxide are adopted for dechlorination, the method has the advantages that the treatment process is obviously shortened, the chlorine content in the organic waste liquid is greatly reduced, the treated organic waste liquid can be directly used for incineration treatment, and obvious environmental protection and social benefits are achieved.

Description

technical field [0001] The invention belongs to the field of organic waste liquid treatment, and more specifically relates to a method for reducing chlorine content in chlorine-containing organic waste liquid and a method for treating chlorine-containing organic waste liquid. Background technique [0002] In many chemical experiments and industrial production, a large amount of organic waste liquid needs to be treated, and a considerable part of the organic waste liquid contains chlorine. Chlorine is a non-metallic chemical element with active chemical properties and can combine with most metal elements to form compounds. Chlorine-containing acidic solutions are corrosive to metal equipment, and high-concentration chlorine-containing waste liquids are seriously harmful to the ecological environment. [0003] The treatment methods of organic waste liquid usually include: incineration method, solvent extraction method, adsorption method, oxidation decomposition method, hydroly...

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Problems solved by technology

[0005] The disadvantage of the above method is that the antimony element used in CN201811321882 is very easy to associate with organic matter, so that the reactable antimony compound is reduced, the efficiency is reduced, and it is not easy to separate in the later stage

CN102464392A uses the compounding method of organic acid and sulfate, which is only suitable for the dechlorination of chlorine-containing wastewater. Because inorganic salts are difficult to ionize in organic compounds, the effect on chlorine-containing organic matter is limited. At the same time, introducing sulfur compounds will make sulfur-containing organic complexes Compounds and associations are more complex and difficult to handle

The problems of this process are: in the case of high recovery rate of titanium tetrachloride, the material in the tower tank has high viscosity, poor fluidity, poor heat transfer, and a long residence time at high temperature will also cause coking on the tank wall , causing the device to shut down

In order to avoid the shutdown caused by tower blockage and coking of the kettle wall, it is necessary to reduce the recovery rate of titanium tetrachloride to ensure the fluidity of the material. waste of

In addition, due to the current hydrolysis treatment, a large amount of acid-containing wastewater and waste residues are produced correspondingly, and the pressure on environmental protection is huge.

And because many catalyst manufacturers do not have the relevant treatment conditions and qualifications themselves, they need to outsource the related acid slag produced, so they are facing increasingly serious environmental and economic pressures