Method for extracting olefin carbon, enriching rare earth and separating inorganic materials by solid waste liquid waste three-phase method

Abstract

The invention particularly discloses a method for extracting olefin carbon, enriching rare earth and separating inorganic materials by a solid waste liquid waste three-phase method. The method is mainly based on supercritical ScCO2 / H2O / organic fat three-phase extraction system, and the means, such as stirring, microwave, ultrasonic or heating or moderately adding acid and enhanced extraction and enhanced mass transfer, are used in an supplementary mode. When necessary, high-speed ball milling and other mechanical forces are used for stripping and enhancing the breakage and re-bonding of chemical bonds. ScCO2 phase is cooperated with H2O phase to form supercritical and acidic environment to dissolve and separate rare earth and carbon in solid waste. Complexation is carried out on safe and environmental-friendly organic lipid additives and the rare earth to extract the rare earth soluble in the H2O phase, the porous carbon or graphene carbon is basically retained in H2O, and the rare earth is transferred to CO2 phase when an organic ester is the same to form a stable CO2 extended solution phase, so that the distribution coefficient of solute in the two phases is changed, and the separation and extraction of rare earth elements and olefin carbon are completed.

Description

technical field [0001] The invention belongs to the field of coal-based solid waste treatment, and in particular relates to a method for extracting olefinic carbon, enriching rare earth and separating inorganic materials by a three-phase method of solid waste, liquid waste. Background technique [0002] my country is the world's largest producer of coal mining, coal power and coal chemical products. A large amount of solid and liquid waste will be generated in the process of coal production, processing and consumption, which has caused a huge burden on the environment. For example, the output of my country's fly ash in 2015 As high as 620 million tons, the cumulative amount over the years is even greater. Coal-based waste that is not treated in a timely and appropriate manner will pose a threat to the environment and human survival. At present, the national policy strongly supports the combustion of low-quality coal and coal gangue for power generation, which is an active res...

AI Technical Summary

Problems solved by technology

[0008] The present invention overcomes the problems of low extraction rate, high energy consumption, high material consumption, and low operability of existing coal-based solid waste extraction methods, and provides a solid waste and liquid waste three-phase method for extracting olefinic carbon, enriching rare earths, and separating inorganic materials Methods

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