Process for producing nano calcium sulfate by using sodium sulfate waste liquid generated in production process of viscose fibers

The invention relates to a process for producing nano calcium sulfate by using a sodium sulfate waste liquid generated in the production process of viscose fibers and belongs to the technical field of waste treatment in the production process of the viscose fibers. The process comprises the following steps: pretreating raw materials, metering, reacting, and carrying out subsequent treatment. According to the process disclosed by the invention, aiming at the characteristics of the sodium sulfate waste liquid generated in the production process of the viscose fibers, a specific pretreatment and subsequent treatment method is combined with a microchannel reactor, so that a nano barium sulfate powder material with uniform particles, good dispersibility and high quality can be produced by using the sodium sulfate waste liquid generated in the production of the viscose fibers, wastes are recycled, the benefits are increased and environmental pollution is reduced. 本发明涉及种利用粘胶纤维生产中硫酸钠废液生产纳米硫酸钙的工艺，属于粘胶纤维生产中的废物治理技术领域。本发