| 摘要 |
A method for preparing basic zinc chloride, a trace element additive, comprises 1) reacting zinc oxide with hydrochloric acid, wherein the mole ratio of zinc oxide to hydrochloric acid is 5:2, a certain amount of hydrochloric acid is previously diluted in 5~10 fold reaction water, then zinc oxide is added thereto, basic zinc chloride is produced by reacting for 1~3 hours under normal pressure condition at a temperature of 55~95 and pH of 6~8, a reaction liquid after centrifugal separation can be used as mother liquor to be recycled in next reaction, the reaction is as follows: 2HCl+5ZnO+4H<SUB>2</SUB>O=Zn<SUB>5</SUB>Cl<SUB>2</SUB>(OH)<SUB>8</SUB>·H<SUB>2</SUB>O; 2) water washing, centrifugal separating; 3) oven drying, pulverizing, and packing. |
