The preparation method of strontium chloride for toothpaste

Abstract

The invention discloses a preparation method of strontium chloride for toothpaste. The preparation method comprises the following steps of A, confecting high-purity Sr(OH)2 0 to 8H2O with purity which is not less than 99 percent to be a Sr(OH)2 aqueous solution; B, mixing the Sr(OH)2 aqueous solution with a MgCl2 aqueous solution, so as to obtain slurry; C, carrying out solid-liquid separation on the slurry, so as to obtain a SrCl2 aqueous solution; D, regulating the pH (potential of Hydrogen) of the SrCl2 aqueous solution to be neutral, and subjecting the SrCl2 aqueous solution to concentration, crystallization, the solid-liquid separation and drying to obtain the strontium chloride for the toothpaste. According to the preparation method of the strontium chloride for the toothpaste, which is provided by the invention, the process is green and clean, the procedure is simple and easily controlled, and the cost is low; the MgCl2 aqueous solution used in the preparation method preferably comes from bischofite, which is low in price, is easily processed and high in consumption, in a saline lake, and the relief of the balance pressure of magnesium ions in the saline lake is facilitated; the preparation method is beneficial to the development and the utilization of a downstream product of a strontium salt and a magnesium resource in the saline lake and the extension of a chemical industrial chain of the saline lake, and has better economic benefit and social benefit.

Description

technical field [0001] The invention belongs to the technical field of toothpaste additives, and in particular relates to a preparation method of strontium chloride for toothpaste. Background technique [0002] With the development of modern society, people's requirements for toothpaste for daily oral hygiene products are getting higher and higher, and toothpaste with a single function can no longer meet people's growing needs. Therefore, adding a variety of drugs and reagents to make toothpaste a multifunctional compound "functional toothpaste" that can prevent a variety of oral diseases and is safe and non-toxic has an increasing proportion in the field of toothpaste development and production. With the excellent anti-allergic properties of strontium chloride, strontium-containing anti-allergic toothpaste is gradually favored by consumers. As a result, the demand for strontium chloride products has begun to take shape, and will increase with the increase in the output of s...

AI Technical Summary

Problems solved by technology

However, this method has very high requirements on the quality of raw material strontium carbonate and hydrochloric acid, and the subsequent evaporation and purification process is complicated, and the product cost is high, so it is only suitable for the production of a small amount of reagent samples; and the technical requirements for spectrally pure strontium chloride are not applicable to strontium chloride for toothpaste production; therefore, the production technology of strontium chloride for toothpaste that meets the needs of human health needs to be developed urgently

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