缓释型固体二氧化氯的制备及其释放通量的影响因素

近年来二氧化氯生产方法和应用方面的研究已成为化工和环保的热点。本文从开拓二氧化氯的应用市场着眼, 并结合环境友好的理念, 以蔗渣浆羧甲基纤维素接枝丙烯酸制备的高吸水树脂为缓释基材, 琼脂为交联剂, 制成一种新型长效缓释型固体二氧化氯, 并考察了它的影响因素。实验结果表明:酸性活化剂的种类和用量、蔗渣浆纤维基质高吸水树脂的用量、温度、稳定性二氧化氯溶液的浓度是影响固体二氧化氯释放通量的因素, 且柠檬酸是最佳的缓释活化剂, 固体ClO₂及含固体ClO₂的产品应在低温下保存, 制备长效缓释型的产品, 稳定性二氧化氯溶液的浓度不宜超过l%。研究结果表明:新型缓释型固体二氧化氯制备工艺简单, 价格低廉, 使用安全有效;设计不同平均释放通量, 不同有效释放时间的固体二氧化氯产品可以根据使用环境, 添加不同浓度的稳定性二氧化氯溶液、不同数量的缓释基材、控制酸性活化剂的种类和加入量来实现, 对二氧化氯的广泛应用具有一定的理论和实践指导作用。

Preparation and influencing factors of release flux factor of slow-release solid chlorine dioxide

Production and application of chlorine dioxide has become a hot spot for chemical engineering and environmental protection. This research prepared a slow-release solid chlorine dioxide with superabsorbent resin as slow-release substrate and agar as cross-linking agent, and the influencing factors were discussed. The results showed that all the factors, including the type and amount of acid activator used, dosage of high water absorbent resin of bagasse pulp fiber matrix, temperature and the concentration of stable chlorine dioxide solution, would influence solid chlorine dioxide flux. Citric acid was found to be the best release activator. Solid ClO₂ and its products should be stored at low temperature and the concentration of stable chlorine dioxide solution should be less than l%. The research results indicated that the new solid chlorine dioxide was cost effective, safe and effective and easy to produce, and different average flux and effective release time of solid chlorine dioxide products could be designed by changing the concentration of stable dioxide chloride solution, the number of slow-release substrate and the type and amount of acid activator.