Preparation method of dihydrate sodium dichloroisocyanate

The invention relates to the preparation field of sanitizer, in particular to a preparation method of dihydrate sodium dichloroisocyanate. The preparation method of the dihydrate sodium dichloroisocyanate is characterized by comprising the following steps of (1) preparing calcium carbonate suspension; (2) preparing intermediate product dichlorine monoxide; (3) preparing cyanuric acid suspension; (4) preparing intermediate product dichlord isocyanurice acid; (5) preparing dehydrate sodium dichloroisocyanurate. The preparation method of the dihydrate sodium dichloroisocyanate has the advantages of work flow continuity and high yield, impurities of products and by-products are less, the purity is high, the operation is simple, convenient and easy to control, the raw material production cost is low, mother liquor water power produced in production can be recycled, no waste water or waste gas is emitted, favorable economic benefit is achieved, and the cost of each ton of products is reduced by RMB680.