Macro-porous adsorption resin regeneration method

Abstract

The invention discloses a macro-porous adsorption resin regeneration method. The method is characterized in that the method comprises the following steps: 1, cleaning a resin bed after the return of hydrogen peroxide, pressing the resin bed with nitrogen to complete remove desalinized water in the resin bed, and displacing residual water in the resin bed with an alcohol compound; 2, immersing the resin bed in the alcohol compound; 3, displacing out the alcohol compound containing water and organic impurities in the resin bed with the alcohol compound; 4, immersing the resin bed with the alcohol compound; 5, respectively repeating step 3 and step 4 two-three times; 6, carrying out circulation cleaning of the resin bed with the alcohol compound; and 7, removing the alcohol compound in the resin bed, and obtaining the resin bed for later use after the cleaning of the resin bed is qualified. The macro-porous adsorption resin regeneration method which adopts the alcohol compound as a regeneration agent effectively reduces the hydrogen peroxide resin regeneration cost, has the advantages of simple technology, simple operation, good regeneration effect, low regeneration cost and high safety, and enables above 90% of the adsorptive performance of the resin to be recovered through the regeneration.

Description

technical field [0001] The invention relates to a regeneration method of macroporous adsorption resin. Background technique [0002] Domestic and foreign enterprises currently produce H 2 o 2 Most of them all use the anthraquinone method. The hydrogen peroxide produced by the anthraquinone method is limited by the extraction tower. The content of anthraquinone organic impurities generally fluctuates between 150-300ppm, and sometimes as high as 500ppm. The existence of various impurities in hydrogen peroxide limits the scope of use of hydrogen peroxide, such as food processing industry, electronics manufacturing industry, and some special-purpose chemical industries have special requirements for the purity of hydrogen peroxide. The hydrogen peroxide used in the ammoximation reaction is generally absorbed by a macroporous adsorption resin before it can be used in the ammoximation reaction. [0003] Macroporous adsorption resin has a large specific surface area and an inner...

AI Technical Summary

Problems solved by technology

However, after the adsorption resin is used for a period of time, the adsorption capacity is close to saturation, and it must be regenerated to restore its adsorption performance.

At present, the commonly used resin regeneration method at home and abroad is the acid-base regeneration method, which is costly and complicated, and the operation risk is high when it is applied to the hydrogen peroxide system. After the resin is used for 7 months, the regeneration effect of the resin is poor, and it is basically impossible to put it into use again. And after the regeneration is completed, the temperature rise is often too high when the resin is put into use.