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三氯化铁主要用于金属蚀刻[1],废水处理。其溶液价格比固体三氯化铁成本低50%左右。文章主要研究电子工业线路板蚀刻废液含铜三氯化铁[3]资源化利用的工艺过程。 相似文献
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FeCl3浸出铅精矿,铅浸出率可达99%以上,而铅精矿中的硫以元素硫形式在浸出渣中结晶析出,重结晶可回收硫磺资源,回收率大于90%,从而消除火法炼铅工艺SO2烟害,浸出液的FeCl2分离后常压下催化氧化再生为FeCl3,实现浸出剂循环。 相似文献
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为了确定测量海绵铜中铜含量的最佳条件,提高工作效率,确保高价值海绵铜含量的准确性,采用碘量法,通过单因素实验研究了几种因素对测定结果的影响。结果表明:样品在放置时间上,完成滴定分析应控制在5 min以上为佳。PH控制在溶液中有铁沉淀(pH=1.9),取样量为3 g条件为宜。 相似文献
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含铜硫化物的氧化铜矿制铜盐及海绵铜 总被引:2,自引:0,他引:2
针对含铜硫化物的氧化铜矿特点,采用硫酸高铁为氧化剂,使铜的提取剂达98%以上。制定两套工艺配合使用,以制取硫酸铜、海绵铜和硫酸亚铁。 相似文献
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从铜镉渣中提取海绵镉的研究 总被引:1,自引:0,他引:1
本文研究了用硫酸浸取铜镉渣,使锌、镉进入溶液,铜留在残渣中。浸取液用锌粉置换,得到的海绵镉中镉含量达69.6%,镉回收率为86.5%,锌全部回收。硫酸锌溶液返回锌制品生产系统,达到充分利用资源,消除环境污染的目的。最佳浸取条件为,硫酸用量为理论量的130~140%,粒度~120目,温度80~90℃,固:液为1:6,软锰矿用量为铜镉渣重量的1%,时间10~12小时,最佳置换条件为,溶液的pH值为4,温度50°,锌粉用量为理论量的122%,时间2小时,镉浓度为16.10克/升。 相似文献
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在乳酸0.1mol,异戊醇和六水三氯化铁用量一定条件下,回流分水合成乳酸异戊酯。探讨了催化剂和醇的用量对反应的影响,找出最佳配比。并用傅立叶变换红外光谱仪对产物结构和性能进行表征。结果表明:n(乳酸)∶n(异戊醇)∶n(六水三氯化铁)=1∶2∶0.027时,酯收率79.3%。 相似文献
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The removal of copper from wastewater by ferric/limestone coagulation followed by screen filtration was carried out at a laboratory
scale. The optimum coagulant (FeCl3) dose and working pH were 50 mg// of Fe(m) and pH 7.5, respectively, through jar tests. For the efficient removal of copper
from wastewater, we developed a novel process including the co-precipitation of copper with FeCl3, alkalization in a limestone aeration bed, and separation of precipitates in a sedimentation tank coupled with internal stainless
steel screen filter. The performance results showed that removal of copper from the solution was over 99.5%. The pH was effectively
maintained over 7.5 in limestone bed during the whole process. Ferric hydroxide/copper aggregates were removed over 99% by
stainless steel screen filter of 1,450 mesh. Periodic air backwashing alleviated fouling of the filter surface. 相似文献
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用赤铁矿制备聚硅氯化铁的研究 总被引:2,自引:0,他引:2
研究了用低品位赤铁矿、盐酸和硅酸钠为原料,制备聚硅氯化铁(PSFC)絮凝剂的方法及絮凝性能.考查了盐酸温度、盐酸浓度、浸出时间和液固比对铁浸出率的影响,铁的浸出率可达95.13%.同时考察了硅酸活化pH、铁硅物质的量比、硅酸活化时间、陈化时间等影响因素.结果表明:PSFC具有良好的絮凝性能,能有效去除印染废水中的浊度、色度、悬浮固体(SS)和化学需氧量(CODCr),用量为100 mg/L时,这4种污染因子的去除率分别可达90.3%,85.5%,92.6%,79.6%. 相似文献
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以钢铁镀件前处理产生的酸洗废液和工业废铝为原料,采用氧化聚合法制备聚合氯化铝铁(PAFC)絮凝剂,并用PAFC处理低浓度的酸性红73,考察各因素对去除效果的影响。实验结果表明:在最佳条件下,PAFC处理10 mg/L的酸性红73的去除率高于85%,处理效果优于市售PAC,但与市售PAFC相当;铝铁比为9∶1的PAFC处理5~20 mg/L的酸性红73,其上清液出水色度均达到了《纺织染整工业水污染物排放标准》(GB 4287—2012)中的特别排放限值要求;达到了以废治废的目的。 相似文献
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Milan B. Radovanović 《Journal of Adhesion Science and Technology》2013,27(4):369-387
This paper deals with electrochemical properties of copper in the presence of the non-toxic compound 2-amino- 5-ethyl- 1,3,4-thiadiazole (AETDA) in acidic chloride solution. Electrochemical techniques: open circuit potential measurements, linear potentiodynamic measurements, cyclic voltammetry measurements and chronoamperometric measurements in addition to SEM–EDS analysis were used during the work. Results show that inhibition efficiency of 2-amino-5-ethyl-1,3,4-thiadiazole depends on inhibitor concentration and immersion time of copper electrode in inhibitor solution. Cyclic voltammetry and linear potentiodynamic measurements beside chronoamperometric measurements indicate formation of protective layer on copper surface. Moreover, results obtained by electrochemical measurements point out that the stability of formed layer depends primarily on the concentration of inhibitor and of potential values at which protective film is formed. Also, potentiodynamic measurements show that AETDA in acidic chloride solutions acts as mixed-type inhibitor. Inhibition mechanism of 2-amino-5-ethyl-1,3,4-thiadiazole includes adsorption of inhibitor on active sites on electrode surface which was confirmed by SEM–EDS analysis of the electrode surface. Adsorption of the AETDA in HCl solution obeys Langmuir adsorption isotherm. 相似文献
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本文报道了以三氯化铁为催化剂,由乙酰乙酸乙酯与乙二醇反应合成苹果酯的研究,同时研究了催化剂用量、原料配比和反应时间对酯化反应的影响。结果表明:当原料配比为1:1.3,催化剂用量为1.0g,反应时间3.5h时,产物收率可达96%。 相似文献