Could someone explain in detail the PTA residue recovery RTR device?

1. The oxidation residue is pulped with toluene, and benzoic acid and PT acid contained therein are dissolved in toluene. 2. Filter, and the solids are dried to yield the by-product TA, which is then exported. 3. For the filtrate from Step 2, the organic phase is subjected to evaporation of toluene to recover it; meanwhile, the benzoic acid by-product is also evaporated and removed. The PT acid that was not distilled was pulped with acetic acid and returned to the oxidation mother liquor tank. 4. To the aqueous phase of the filtrate from Step 2, toluene is added for extraction; the organic phase is then fed into the slurry oxidation residue from Step 1. The aqueous phase is adjusted in pH with a base to recover cobalt and manganese, while removing impurities such as iron. 5. The recovered cobalt-manganese is returned to the PT acid pulping tank, and together with the PT acid, it is sent back to the oxidation mother liquor tank. That’s more or less it.