Surface modified baking soda as well as preparation method and application thereof

The invention belongs to the field of hardening resistance of baking soda, and particularly relates to surface modified baking soda as well as a preparation method and application thereof. The surface modified baking soda comprises a sodium bicarbonate inner core, and the sodium bicarbonate inner core is wrapped with a silica protective film formed by drying water glass. Compared with a physical mixing method of talcum powder and the like, the surface modified baking soda provided by the invention has the advantages that the flowability and hardening resistance of a desulfurizing agent can be more effectively improved, the long-acting hardening resistance of the baking soda is improved, and the desulfurization performance of the baking soda is improved to a certain extent; the desulfurization effect of the baking soda product under the conditions of high temperature, high humidity, high pressure and long-term transportation and storage is ensured. 本发明属于小苏打的抗板结领域，具体涉及一种表面改性小苏打及其制备方法和应用。该表面改性小苏打包括碳酸氢钠内核，碳酸氢钠内核外