Preparation method of calcium hydroxide particles with high specific surface area

Abstract

The invention discloses a preparation method of calcium hydroxide particles with high specific surface area, which comprises the following steps: (1) placing an aqueous solution of chitosan oligosaccharide in a nitrogen protection atmosphere, heating in a water bath, adding an aqueous solution of polyethyleneimine and glutaraldehyde, and stirring at a constant temperature to obtain an auxiliary agent I; (2) adding an aqueous solution of triethanolamine and hydroxypropyl guar gum into the aid I to obtain a compound aid; and (3) heating the composite additive in a water bath to 70 + / -5 DEG C, preserving heat, then adding calcium oxide powder, carrying out digestion reaction, carrying out solid-liquid separation, washing with ethanol, and drying to obtain the calcium hydroxide particle powder with high specific surface area. The calcium hydroxide particle powder prepared by the method disclosed by the invention has a relatively high specific surface area, so that the calcium hydroxide particles can well meet the requirements on the calcium hydroxide particles in a desulfurization and denitrification process.