▎ 摘　　要

NOVELTY - Synthesizing calcium hydroxide involves adding purified water and heavy calcium to a reaction kettle, stirring, heating, heat-preserving and stirring to obtain a reaction liquid, filtering, separating, and discarding the filter cake to obtain a calcium chloride solution, adding cetyltrimethylammonium bromide and liquid caustic soda to a reaction device, stirring, heating, dripping the calcium chloride solution into the device, heat-preserving, suction filtering, and leaching to obtain a filter cake, adding mono-(6-amino-6-deoxy)-beta-cyclodextrin and aminated graphene to water, heating, adding glutaraldehyde under stirring to obtain a reaction solution, stirring, filtering, and drying the filter cake to obtain graphene-modified beta-cyclodextrin, and adding graphene-modified beta-cyclodextrin, fatty alcohol polyoxyethylene ether and obtained filter cake to water, stirring and dispersing, heating, centrifuging, filtering, washing the obtained solid, and drying. USE - The method is useful for synthesizing calcium hydroxide. ADVANTAGE - The method: provides calcium hydroxide, which has high specific surface area; adopts cetyltrimethylammonium bromide, which performs in-situ modification of product to prevent particle agglomeration during synthesis process, and slows down Brownian motion to effectively control the agglomerates; effectively prevents the intermolecular agglomeration; and promotes dispersion of binding sites of calcium hydroxide and acid gas during deacidification gas reaction, thus achieving more efficient reaction. DETAILED DESCRIPTION - Synthesizing calcium hydroxide involves adding purified water and heavy calcium in mass ratio of (1-3):1 to a reaction kettle, stirring, heating at 40-80degrees Celsius, dripping hydrochloric acid to adjust pH to 2-4, heat-preserving, stirring for 1-2 hours to obtain a reaction liquid, filtering, separating, and discarding the filter cake to obtain a calcium chloride solution, adding cetyltrimethylammonium bromide and 28-32 %mass liquid caustic soda to a reaction device, stirring, heating at 60-80degrees Celsius, dripping the calcium chloride solution, heat-preserving for 0.5-1 hour, suction filtering, and leaching to obtain a filter cake, adding mono-(6-amino-6-deoxy)-beta-cyclodextrin and aminated graphene to water, adjusting the pH to 4.5-5.5 with acetic acid, heating to 30-50degrees Celsius, adding glutaraldehyde under stirring, stirring for 5-15 hours to obtain a reaction solution, adjusting the pH to 7.5-8.5 with sodium hydroxide aqueous solution, stirring for 5-15 minutes, filtering, and drying the filter cake to obtain graphene-modified beta-cyclodextrin, and adding graphene-modified beta-cyclodextrin, fatty alcohol polyoxyethylene ether and the obtained filter cake to water, stirring and dispersing for 30 minutes, heating to 50-70degrees Celsius, stirring at 800-1600 rpm for 2 hours, centrifuging, filtering, washing the obtained solid with water, and drying. The mass ratio of cetyltrimethylammonium bromide, liquid caustic soda and heavy calcium is (0.1-0.3):(0.6-0.8):1. The mass ratio of mono-(6-amino-6-deoxy)-beta-cyclodextrin, aminated graphene, water and glutaraldehyde is (4-6):(1-3):(100-200):(0.05-0.5). The mass ratio of graphene-modified beta-cyclodextrin, fatty alcohol polyoxyethylene ether, heavy calcium and water is (0.02-0.05):(0.01-0.04):1:(3-5).