Regeneration of Spinning Bath and Production of Sodium Sulfate in the Viscose Fiber Industry

EBNER plants for spinning bath treatment have been operating for several decades at a viscose fiber producer’s factory in Germany. Due to this history and the customer’s satisfaction with the existing plants, EBNER was awarded the contract for the planning, delivery, and erection of a plant for the regeneration of spinning bath and production of sodium sulfate from spinning bath contaminated by the fiber production process.

During the spinning process in viscose fiber factories, a chemical reaction occurs where sodium sulfate and water are formed from sodium hydroxide and sulfuric acid, thereby consuming and diluting the so-called spinning bath. Previously, this spinning bath was used only once and then discharged as wastewater, leading to significant environmental pollution and high operating costs. This necessitated the need to regenerate the spinning bath and reintroduce it into the process, or additionally produce a marketable product from the contained sodium sulfate.