N,N-二甲基-N-丙烯基十六烷基溴化胺的合成及表征

红外光谱、核磁共振氢谱和质谱证实,以溴代丙烯与N,N-二甲基十六烷基胺为主要原料所合成的产品为阳离子表面活性剂单体N,N-二甲基-N-丙烯基十六烷基溴化胺,并且其纯度很高.     

N，N-二甲基-N-丙烯基十六烷基溴化胺的合成及表征

红外光谱、核磁共振氢谱和质谱证实,以溴代丙烯与N．N-二甲基十六烷基胺为主要原料所合成的产品为阳离子表面活性剂单体N,N-二甲基-N-丙烯基十六烷基溴化胺,并且其纯度很高．     

二烷基磷(膦)酸酯萃取钴、镍选择性的研究

本文研究了二烷基磷(膦)酸酯的化学结构对钴、镍萃取选择性的影响,讨论了不同二烷基磷(膦)酸酯对钴、镍的萃取选择性产生差异的原因。研究结果表明,随着磷原子上的取代基的诱导常数总和|∑σ(?)|函数(或萃取剂离解常数的负指数pKa值)及空间位阻效应的增加,对钴的萃取性能影响不显著、镍的萃取能力则下降。在所研究的萃取剂中钴的萃取选择性按以下次序下降:AMHPA(5709)>EHEHPA>ADiBMPA>NMHPA>NEHPA>D(DiBM)PA>AEHPA>D2EHPA从硫酸溶液中萃取分离钴、镍,AMHPA(5709)是具有应用前景的优良萃取剂。     

冶炼烟尘中氟、氯、溴和碘测定方法研究

通过优化冶炼烟尘样品前处理条件,采用离子色谱法,建立了冶炼烟尘中氟、氯、溴和碘4种元素的测定方法.结果表明,在碱熔温度700℃、碱熔时间60 min条件下,样品中氟、氯、溴和碘含量的测定准确度较高.对冶炼烟尘中的氟、氯、溴和碘分别进行了3组加标回收实验和6次平行实验,氟、氯、溴和碘加标回收率为85％～105％,相对标准...     

E-4-溴-(1,2-二苯乙烯)的合成研究

以对溴苯甲醛为原料,经两步反应合成E-4-溴-(1,2-二苯乙烯)。优化条件:48 g氯苄与60 g亚磷酸三乙酯在147～150℃制取中间体DTBP 78 g;对溴苯甲醛60 g,溶剂甲苯500 g,甲醇钠21 g,反应温度40～45℃,反应时间4 h,获得产品收率达68%。这种合成方法条件温和、经济又易控制,适合工业化生产。     

环保型阻燃剂N,N'-1.2-乙烷-双[5.6-二溴降冰片烷-2.3-二酰亚胺]的合成工艺及表征

采用四步法合成了环保型阻燃剂N,N'-1.2-乙烷-双[5.6-二溴降冰片烷-2.3-二酰亚胺],并对合成产品进行了表征.红外谱图分析、元素分析和DSC测试均表明,所合成的最终产品为目标产物N,N'-1.2-乙烷-双[5.6-二溴降冰片烷-2.3-二酰亚胺].     

含钴二次资源中钴的提取技术研究进展

当前社会对钴资源的需求量激增, 仅从矿产资源中提取钴金属已不能完全满足市场的需求。从钴的二次资源中分离提取钴是解决钴资源供应不足问题的重要途径。本文对含钴资源和废旧催化剂、钴锰废渣、废旧电池等钴锰二次资源的特点进行了分析, 对比介绍了化学沉淀法、溶剂萃取法、离子交换法、膜电解法分离溶液中钴锰离子的工艺、原理及技术效果, 同时综述了适用于溶液中钴锰分离的选冶联合方法研究进展, 其中浮游萃取法兼具界面分选与化工分离的双重优势, 钴锰分离效率高、流程短、成本低, 特别适用于选冶工业中大规模低浓度废液或废水有价金属的分离与富集, 应用前景广阔。      

DADMAC-AA两性共聚物的合成及应用

采用溶液聚合法,以二甲基二烯丙基氯化铵(DADMAC)和丙烯酸(AA)为单体,偶氮二异丁脒盐酸盐为引发剂,异丙醇为链转移剂,合成了一种二甲基二烯丙基氯化铵-丙烯酸(DADMAC-AA)两性共聚物.研究了反应温度、链转移剂、引发剂对聚合反应的影响,制得产物的固含量为27%～29%,pH为4.2～5.2,粘度为1000～1300 cps.将自制的DADMAC-AA与国外同类产品分别用于洗发水中,该产品具有更好的干发梳理性.     

氧化铜钴矿酸浸液深度除铁工艺的研究

以氧化铜钴矿为原料,先通过焙烧预处理、高压酸浸的方法获得含钴浸出液,然后用过氧化氢作氧化剂,考查搅拌时间、溶液温度及沉淀终点pH值等对沉淀除铁的影响.结果表明:浸出液中加入适量过氧化氢溶液作氧化剂,可促进杂质铁的沉淀分离.在溶液温度为60℃、搅拌时间为120 min、沉淀终点pH值为3.5的条件下,杂质铁的去除率可达99.42％,以渣含钴计钴损失率为0.08％,较好地实现了含钴浸出液深度除铁目标.     

电感耦合等离子体质谱法测定湖泊水中痕量溴、碘

采用电感耦合等离子体质谱法测定湖泊水中痕量溴、碘,考察了不同酸度对溴、碘测定的影响,测量过程中碘记忆效应的消除,确定合适的工作条件,方法检出限低(Br:0.58 ng/mL、I:0.07 ng/mL),精密度好,为1.21%～2.39%.对武汉市内四个湖泊水样进行了检测,并做了样品加标回收实验,加标回收率在98%～117%范围内.对国家水样标准进行了测定,测定结果与推荐值一致性较好.实验证明,使用ICP-MS测定湖泊水中溴、碘具有简便快速、重复性好、结果准确的优点.     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

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