Possible reuse of the solvent in preparation of Arlan fibre for dyeing

The possibility of using a swelling agent (mixture of DMAA—water) three or four times for preliminary treatment of Arlan fibre before dyeing without changing the intensity and quality of dyeing was demonstrated. Processes for cleaning residual concentrated dye baths with Biopag flocculent and Zeopag sorbent were investigated. Their high effectiveness was demonstrated.