摘要
针对煤气脱硫废料(简称废料)的成分(硫、碳、萘及少量其他有机物),提出了一种处理废料的新工艺,先用乙酸乙酯提取废料中的萘和少量其他有机物,再用复合溶剂 B 加热溶解废料,热过滤得到碳粉,最后将溶液冷却结晶分离出硫。实验结果表明:在乙酸乙酯与废料的质量比(R_1)为3.75、提取温度为60℃、提取时间为4 h 的条件下,萘回收率为98%,纯度大于等于70%;在复合溶剂 B 与提取剩余物的质量比(R_2)为2.69、过滤温度为100℃的条件下,硫回收率接近100%,纯度大于等于99%,碳回收率和纯度均为100%。
According to the composition of coal gas desulfurization waste, such as sulfur, carbon, naphthalene and a little of other organic compounds,a new process was developed to treat the waste. First,naphthalene and a little of other organic compounds in the waste were extracted with ethyl acetate;Then the waste was dissolved in complex solvent B with heating and hotly filtrated to obtain carbon powder; In the end, the solution was cooled and sulfur was crystallized and separated. The experimental results show that： When the mass ratio of ethyl acetate to the waste（ R1 ）is 3. 75, the extraction temperature is 60 ℃ and the extraction time is 4 h,the recovery of naphthalene is 98% and its purity is more than or equal to 70% ;When the mass ratio of complex solvent B to extraction remainder（R2 ）is 2.69 and the filtration temperature is 100 ℃ ,the recovery of sulfur is near 100% and its purity is equal to or more than 99% ,and those of carbon are both 100%.
出处
《化工环保》
CAS
CSCD
北大核心
2007年第1期71-74,共4页
Environmental Protection of Chemical Industry
关键词
煤气脱硫废料
乙酸乙酯
复合溶剂
硫
碳
coal gas desulfurization waste
ethyl acetate
complex solvent
sulphur
carbon
