Preparation method of basic zinc chloride

Abstract

The invention discloses a preparation method of basic zinc chloride, comprising the following steps of: adding sodium hydroxide or ammonia water into zinc chloride solution with the mol ratio of the sodium hydroxide or ammonia water to zinc chloride solution of 7.5-8.5:5, reacting under the condition that the temperature is 60-105 DEG C and the pH value is 5-9, and obtaining reaction products after the reaction is finished; and washing with water, centrifuging and drying reaction products to obtain the basic zinc chloride. The preparation method is simple and safe in operation, and has the advantages of little waste emission, low production cost and excellent product quality.

Description

technical field

[0001] The invention relates to a preparation method of a zinc compound, in particular to a preparation method of a zinc halide. Background technique

[0002] As a new zinc source feed additive, basic zinc chloride has low addition level, less dosage, good palatability, high biological potency and feeding effect compared with conventional zinc sources such as zinc oxide and zinc sulfate. It is a new type of feed additive that is safe, efficient, environmentally friendly and has comprehensive effects. In the current production and preparation process of basic zinc chloride, it can be produced by using waste zinc, by reacting zinc chloride and zinc oxide, or by reacting hydrochloric acid and zinc oxide or by reacting hydrochloric acid and basic zinc carbonate. Yes, among these preparation methods, the production cost of some methods is too high, the raw materials used in some methods are relatively expensive, and the by-products obtained in some preparation me...