有机膨润土吸附丁基黄药试验研究

以钠基膨润土为原料制得有机膨润土,采用红外光谱对有机膨润土进行表征。研究了有机膨润土用量、吸附时间、温度及p H值对有机膨润土吸附丁基黄药效果的影响,并结合吸附动力学模型研究有机膨润土对丁基黄药的吸附特性。结果表明,在有机膨润土用量为1.4 g/L,p H值为9,温度30℃,吸附时间20 min时有机膨润土对黄药的吸附率为96.06%,且有机膨润土对丁基黄药的吸附过程更适合采用二级吸附动力学方程进行描述。     

利用山东膨润土生产有机膨润土研究

介绍了以山东某地钙基膨润土为原料 ,经过钠化、有机化处理制备有机膨润土的过程 ,讨论了影响有机膨润土性能的因素 ,并用X射线衍射、红外光谱对有机膨润土进行了表征     

新疆有机化改性膨润土吸附水中金属离子的研究

考察了新疆夏子街钠基膨润土及有机化改性膨润土对水溶液中金属离子的吸附能力,重点研究了有机膨润土吸附水溶液中金属离子的工艺条件,以及有机膨润土的粒径和吸附次数对吸附效果的影响。实验表明:有机膨润土对金属离子的吸附能力明显优于原土;溶液的pH值对吸附效果影响较大;有机膨润的粒径对吸附效果影响较小;有机膨润土对Cr6+、Hg2+、Cu2+金属离子的吸附符合吸附等温方程。     

改性膨润土处理污水中有机污染物的研究

探讨了有机膨润土再生及再生膨润土有机化，采用正交试验得出再生有机膨润土吸附水中有机污染物的适宜条件，进行了再生前后有机膨润土对有机污染物吸附效果的比较。结果表明，在780 ℃、灼烧55 min是再生膨润土的最佳再生条件，适宜有机化条件是浆液浓度30%，改性剂7 mmol/100 g，反应温度 60 ℃，反应时间80 min；再生有机膨润土吸附有机污染物最佳吸附条件为pH=6，加土量6g/L，温度25 ℃，振荡时间20 min，COD去除率可达到80%。     

改性膨润土的制备及其对水溶液中硝基苯的吸附作用

通过改性辽宁某地钙基膨润土,制备无机柱撑膨润土、有机—无机柱撑膨润土及有机膨润土,并分别表征其结构特征;研究了膨润土原土及三种改性膨润土的吸附性能。结果表明,它们对水溶液中硝基苯的吸附能力大小顺序为:有机膨润土>有机—无机柱撑膨润土>原土>无机柱撑膨润土;室温条件下,硝基苯初始浓度10mg/L,吸附剂投加量20g/L,吸附振荡时间为40min时,有机膨润土对硝基苯的去除率达64.4％,较相同条件下原土对硝基苯的去除率提高了21.3％。有机膨润土对硝基苯的吸附等温线近似成直线,改性膨润土对硝基苯的吸附以蒙脱石层间有机物的萃取作用为主。     

甘肃金昌红泉膨润土制备有机膨润土的研究

以甘肃全昌红泉膨润土为原料,利用正交试验方法,分析论证该膨润土制备有机膨润土的可行性.结果表明,该膨润土可以制备有机嘭润土,并在一定反应条件下能够制备出高脱色率的有机膨润土.     

有机膨润土制备及其对苯胺的吸附性研究

以信阳上天梯矿膨润土为原料,经钠化处理后,用溴代十六烷基三甲胺进行有机包覆,制得憎水亲油性有机膨润土;研究了有机膨润土对水中苯胺的吸附作用,探讨了吸附时间、介质pH值、苯胺浓度等因素对吸附的影响,以及有机膨润土对苯胺的吸附机理。     

膨润土改性技术与工业废水处理

本文对近年来国内外膨润土的先进改性技术，如无机改性、有机改性、交联膨润土的合成、无机—有机膨润土的合成等进行了归纳，介绍了膨润土在工业废水处理方面的最新应用，展现了膨润土在环保领域的广阔应用前景。     

复合插层有机膨润土的制备及脱色性能研究

通过X-射线衍射分析(X-ray)、红外光谱分析(IR)等手段分析了十六烷基三甲基溴化铵(CTMAB)和己内酰胺复合插层有机膨润土的结构,用可见光分光光度法分析了有机膨润土对染料废水的吸附脱色性能.结果表明,不同比例CTMAB/己内酰胺复合插层有机膨润土的层间距均大于单阳离子CTMAB插层有机膨润土的层间距,其中以3:1复合插层制备的有机膨润土对染料废水的吸附脱色率明显高于CTMAB插层膨润土,可用于染料废水的吸附脱色处理.     

新疆拉伊格来克有机膨润土制备试验研究

试验研究了有机膨润土反应机理。针对新疆拉伊格来克膨润土物理化学特性,选择湿法离心提纯,得到蒙脱石含量94%的提纯土;通过不同改性剂、用量、固液比、时间、pH值、温度等因素的优化试验,确定了制备有机膨润土的工艺参数,试验产品质量超过了有机膨润土行业标准。     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

2014 second batch of rare earth quota released

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矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586