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硅铝凝胶是我国自行研制的一种新型人工合成粘合剂,应用于分子筛成型工艺。粘合剂中硝酸根的含量,是关系到分子筛使用寿命的一个极其重要的质量参数.为此我们通过反复摸索、验证工作,建立了准确可靠的硝酸根测试方法。条件实验一硫酸浓度对显色的影响实验表明,显色反应,必需在足够浓的H_2SO_4介质中进行,这样可保证显色完全,色泽稳定。
Silica gel is our own developed a new type of synthetic adhesive, used in molecular sieve molding process. The content of nitrate in the binder is an extremely important quality parameter related to the service life of the molecular sieve.Therefore, through repeated exploration and verification work, we established an accurate and reliable method for the determination of nitrate. The experimental conditions of a concentration of sulfuric acid on the color of experiments show that the color reaction must be carried out in a sufficient concentration of H2SO4 medium, so as to ensure complete color development, color stability.