Method for preparing high-performance activated carbon by utilizing phenolic wastes

[0030] Example 1

[0031] In the beaker, add 192g of p-hydroxyphenylhydantoin production solid waste residue (equivalent to 1.0mol o-hydroxyphenylhydantoin), add 200mL of deionized water, stir and disperse, adjust the pH of the suspension to 1-2 with hydrochloric acid with a mass concentration of 10%. Heat to 80°C, slowly add 60.8g of formaldehyde solution with a mass concentration of 37% (equal to 0.75 mol of formaldehyde) under stirring. After the addition is completed, the reaction is kept for 1h, and cooled to 30°C. The polymerization of ureidohydantoin and urea with formaldehyde The product was still dissolved in the mother liquor, the precipitate was separated by filtration, and dried at 105°C to obtain 122 g of thermoplastic hydantoin-substituted phenolic resin. In addition, add 192g of p-hydroxyphenylhydantoin production solid waste residue (equivalent to 1.0mol o-hydroxyphenylhydantoin) in the beaker, add 200mL of deionized water, stir and disperse, adjust the pH of the sus

[0033] Example 2

[0034] 100g of the hydantoin-substituted phenolic resin matrix prepared in Example 1 and 150g of anhydrous zinc chloride with a content of 98% were mixed and ground into an alumina crucible and placed in a box-type high-temperature furnace protected by nitrogen. The heating rate is 5°C / min to 550°C. The heating of the high-temperature furnace is stopped, and the temperature is lowered to 350°C at a heat dissipation rate of 5°C / min. The nitrogen gas is stopped, and the activated material is naturally cooled to normal temperature in the air. Transfer the activated material into the dissolving tank, immerse and dissolve zinc chloride in 500mL hot water grades, then impregnate the activated carbon with a 10% mass concentration of dilute hydrochloric acid solution, filter the activated carbon, and wash the activated carbon with deionized water to a pH of 5-6 , Dried at 120℃ to obtain high-performance activated carbon powder with a specific surface area of ​​1200m