In the process of production of stannous chloride, additives A can protect and extend expiration date of the product. The method of orthogonal experiment was used to get the optimum technology parameter: the amount of additive A was 0. 2%, the Sn2+ concentration was 1200 g/L, acidity was 3 mol/L, crystallization time was 4 h, crystallization temperature was -5 ℃, 8 months later, whiteness dropping from 75. 6 to 75. 1, changes was very small. The products in the workshop production can reach the standard of HG/T 2526-2526 , the actual expiration date have been over 12 months.
NETL
NSTL
维普
万方数据
