CAJ | 학술논문

针对除去ADC发泡剂固废物十水碳酸钠中少量剧毒物质水合肼难题，充分回收利用其中的碳酸钠。采用重结晶法提纯副产物十水碳酸钠。考察了固液比、结晶时间、二次重结晶对十水碳酸钠的收率、水合肼、氯化钠含量的影响。实验结果表明：固液比为2.5∶1，Na2CO3·10H2O收率达76.71%，NaCl 含量由原液中的0.115%下降为0.0555%，N2H4由0.015%下降为0.00989%；结晶时间20 min，可使Na2CO3收率82%；二次重结晶时间30 min，可使Na2 CO3质量百分含量提高到40.35%，NaCl含量下降至0.01269%。
침대제거ADC발포제고폐물십수탄산납중소량극독물질수합정난제，충분회수이용기중적탄산납。채용중결정법제순부산물십수탄산납。고찰료고액비、결정시간、이차중결정대십수탄산납적수솔、수합정、록화납함량적영향。실험결과표명：고액비위2.5∶1，Na2CO3·10H2O수솔체76.71%，NaCl 함량유원액중적0.115%하강위0.0555%，N2H4유0.015%하강위0.00989%；결정시간20 min，가사Na2CO3수솔82%；이차중결정시간30 min，가사Na2 CO3질량백분함량제고도40.35%，NaCl함량하강지0.01269%。
In order to solve the problem of removing a small amount of toxic substance-hydrazine hydrate from Na2CO3·10H2O as by-product in producing ADC foaming agent, to recycle and utilize sodium carbonate, Na2CO3·10H2O was purified by recrystallization method. Effects of solid-liquid ratio, crystallization time and secondary recrystallization on yield of sodium carbonate, hydrazine hydrate content and NaCl content were investigated. The results show that, when solid-liquid ratio is 2.5︰1, Na2CO3·10H2O yield can reach to 76.71%, the content of NaCl decreases from 0.115% to 0.0555%, and the content of N2H4 decreases from 0.015%to 0.00989%;when the crystallization time is 20 min, the average yield of Na2CO3·10H2O can reach to 82%;when the secondary recrystallization time is 30 min, the content of Na2CO3·10H2O can reach to 40.35%, the content of NaCl can drop to 0.01269%.