Method for co-producing sodium pyrosulfate and sulfuryl chloride

The invention discloses a method for coproducing sodium pyrosulfate and sulfuryl chloride. The method comprises the following steps: reacting the industrial byproduct sodium chloride with sulfur trioxide-containing gas at a high temperature to prepare sodium pyrosulfate, carrying out condensation reflux treatment on generated tail gas to recover sulfur trioxide, and introducing the tail gas into asulfuryl chloride synthesis device to synthesize sulfuryl chloride. The method is not reported at home and abroad, and is a pioneering technology; and the method prepares the high-content sodium pyrosulfate, overcomes the problems of accumulation and high treatment cost of the byproduct sodium chloride at present, converts the low-value byproduct sodium chloride into a high-value product which can be directly used for downstream production, and truly realizes the comprehensive utilization of resources. 本发明公开了一种联产焦硫酸钠和硫酰氯的方法，利用工业副产氯化钠与含三氧化硫的气体在高温下进行反应，制备焦硫酸钠，产生的尾气先经过冷凝回流处理回收三氧化硫，再通入硫酰氯合成装置中合成硫酰氯。本发明在国内外均未有报道，属于首创科技，即制