Adsorption treating method for resinifying sulfonated waste acid in DSD acid production

The present invention discloses adsorption treating process of sulfonated waste acid for DSD acid production, and belongs to the field of waste treating and resource recovering technology. The adsorption treating process includes the following steps: filtering the sulfonated waste acid to recover suspended NTS and eliminate other suspended solid matters; making the filtered sulfonated waste acid flow through bed layer with macroporous adsorbing resin for adsorption; and desorbing and regenerating saturated resin bed layer with water solution of alkali. The present invention has the advantages of high COD and chroma eliminating effect, no reduction of waste acid concentration, simple apparatus and operation, and low cost. The treated waste acid may be used in the reduction step in DSD acid production.