Process for recovering diphenyl sulfone from diphenyl sulfone residues

The invention relates to the technical field of data security, and discloses a process for recovering diphenyl sulfone from diphenyl sulfone residues, which comprises the following process steps of: 1, mixing the diphenyl sulfone residues with an organic solvent according to a certain proportion; 2, water bath heat preservation; and 3, filtering the mixture, adding activated carbon into the diphenyl sulfone residues in the first step and the second step, fully stirring to decolorize the diphenyl sulfone residues, and adding resin-containing waste activated carbon into the diphenyl sulfone residues to complete tar removal treatment. According to the present invention, the resin-containing waste active carbon is added to the diphenyl sulfone residue, the diphenyl sulfone crude product can be obtained by purifying the diphenyl sulfone residue, the time periods for adding the resin-containing waste active carbon are different, the diphenyl sulfone content and the crude product yield in the obtained crude product