Method for improving quality of oxammonium hydrochloride and raising yield of oxammonium hydrochloride

The invention relates to a method for improving quality of oxammonium hydrochloride and raising the yield of oxammonium hydrochloride. The method includes the following steps that 1, oxammonium hydrochloride hydrolysate is added into a concentration kettle, and then mother liquid containing oxammonium hydrochloride is added into the concentration kettle; 2, the concentration kettle is heated, the temperature is made to be 60-90 DEG C, and the pressure is made to be 500-1000 Pa till liquid in the concentration kettle generates a crystal substance; 3, the concentration kettle is naturally cooled to 10-30 DEG C, then the concentration kettle is opened to completely discharge filtrate, ethyl alcohol is added into the concentration kettle to wash filter residues, and the filter residues are removed and dried. The previous batch of filtrate is adopted to serve as the mother liquid containing oxammonium hydrochloride and mixed with oxammonium hydrochloride hydrolysate, then heating and cooling crystallization are co