The invention relates to a bainite sulfonic acid desiccant, a preparation method thereof and an application thereof in the preparation of a hydraulic adhesive, which comprises: - 5% - 25% as a mineral compositionPart I: 10% - 20%Calcium aluminite of general c2axf (1-x) compositionX is between 0.2 and 0.8. -15%-35%20% - 30% in advancede phase sulfoaluminate de calcium yee limite (C4A3 26dollar)-40%-75%45% - 65% discount-0.01-10% of one or more small phases selected from calcium sulfate, alkaline sulfate, calcium aluminate, gelatine rock, free lime and glass phase - and at least one secondary element selected from sulfur, magnesium, sodium, potassium, boron, The total content of phosphorus, zinc, manganese, titanium, fluorine and chlorine is less than or equal to 15%.
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