CAJ | 학술논문

因原料即工业级碳酸钠来源不同，其中含有杂质类别、含量差异较大，因此，采取不同的物理、化学方法以及一定顺序流程，形成了工业级碳酸钠提纯的各种方法。以华峰副产工业碳酸钠为提纯研究对象，通过一系列物理处理方法，制备纯度较高的试剂级碳酸钠，并对所得中间产品中杂质含量进行分析，从而对工业碳酸钠提纯过程的杂质驻留与去除进行研究。实验结果表明，可溶性离子铁、Pb2+、 Ca2+、Al3+、氯化物和硫酸盐等杂质在碳酸钠晶体表面粘附引起吸藏； K+、Mg2+生成混晶引起共沉，需要经过碳酸钠晶体熔融后才能使杂质降到分析纯级；碳酸钠结晶过程中形成晶簇，包藏母液，晶间包藏磷酸及硅酸盐。
인원료즉공업급탄산납래원불동，기중함유잡질유별、함량차이교대，인차，채취불동적물리、화학방법이급일정순서류정，형성료공업급탄산납제순적각충방법。이화봉부산공업탄산납위제순연구대상，통과일계렬물리처리방법，제비순도교고적시제급탄산납，병대소득중간산품중잡질함량진행분석，종이대공업탄산납제순과정적잡질주류여거제진행연구。실험결과표명，가용성리자철、Pb2+、 Ca2+、Al3+、록화물화류산염등잡질재탄산납정체표면점부인기흡장； K+、Mg2+생성혼정인기공침，수요경과탄산납정체용융후재능사잡질강도분석순급；탄산납결정과정중형성정족，포장모액，정간포장린산급규산염。
Because the raw material is industrial grade sodium carbonate containing impurities from different sources, and impurities type and content are different, different physical and chemical methods and processes need be used to purify industrial sodium carbonate. In this paper, taking Huafeng industrial by-product sodium carbonate as research object, high purity reagent grade sodium carbonate was prepared through a series of physical treatment processes, and impurity content of the intermediate products was analyzed, so as to studyimpurity residing and removing during industrial sodium carbonate purification process. Experimental results show that soluble ions of iron, Pb2+, Ca2+, Al3+, as well as chlorides and sulfates are usually occluded in sodium carbonate crystal surface; K+and Mg2+ generate mixed crystal to cause co-precipitation, so the sodium carbonate crystal need be melted to reduce the impurities; the sodium carbonate crystallization process forms the drusy which can occlude the mother liquor, phosphate and silicate can be occluded among crystal grains.