Dehydration method of synthetic rubber solvent

The present invention relates to the field of rubber synthesis, and discloses a dehydration method of a synthetic rubber solvent. The dehydration method comprises the steps of: introducing a wet solvent into a solvent standing unit to carry out standing layering, introducing the obtained upper layer solvent into a separation membrane unit to carry out dehydration for 1-2 times, and returning the dehydrated solvent to a polymerization unit, wherein a separation membrane is a composite nanofiltration membrane. According to the method, the solvent for polymerization of the synthetic rubber can bedeeply dehydrated without liquid phase change and high-temperature heating, and the method is simple in step, energy-saving and environment-friendly. 本发明涉及橡胶合成领域，公开了一种合成橡胶溶剂的除水方法，该方法包括将湿溶剂引入溶剂静置单元进行静置分层，将得到的上层溶剂引入分离膜单元进行脱水1-2次，将脱水后的溶剂返回至聚合单元，其中，所述分离膜为复合纳滤膜。该方法不通过液体相变和高温加热就能实现对合成橡胶聚合用的溶剂进行深度脱水，步骤简单，节能环保。