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冷析
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  cold separation
     Engineering summarization was made for treatment of low concetration NH_4Cl waste water which was produced in the K_2CO_3 production process,through ion exchange/concentration and low temperature multi-effective evaporation cold separation crystallization technology the NH_4Cl could be recovered;
     对K2CO3生产过程中产生的低浓度NH4C l废水处理进行了工程总结,通过离子交换浓缩和低温多效蒸发冷析结晶技术回收NH4C l;
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  “冷析”译为未确定词的双语例句
     Study on the Purification of Natur al Vitamin E by Saponification and Crystallization
     皂化—冷析法精制天然维生素E工艺的研究
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     The results of the experiment show that the best processing conditions are as following; distillation(w/v)10∶10;
     实验结果表明 ,最佳的工艺条件为 :馏出物∶甲醇 (w/v) 10∶10 ,冷析温度 :0℃ ,酯化时间 :2h。
短句来源
     NH_4Cl is a by-product in the crystallizing process.
     同时利用冷析结晶制得工业级NH4Cl副产品。
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     According to the characteristics of dust from kinescope glass crust, the methods that lead is leached out by hot cycling hydrochloric acid and lead cholride is separated out by cooling way are put forwarded in the paper, by means of which, the key point of the technique to make chromium yellow pigment from lead chloride is solved with the advantage of better environmental and economical benefits.
     针对显像管玻壳粉尘的特点,提出了采用盐酸热循环浸取铅,冷析氯化铅产品,实现铅尘无害化的方法; 并解决了由氯化铅生产铬黄颜料的技术关键。
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     There are complicated components and a large amount of lead in the lead dust of the glass shell of kinescope,so it has potential harm. Using the method that lead is leached out by hot circulating hydrochloric acid and lead chloride is cooling seperated,lead leaching rate can exceed 95%,purity of PbC12 seperated out is 95%-96%. Lead in the dust is fully utilized,turning the dust to be unharmful to people.
     显像管玻壳含铅粉尘组成复杂,铅含量高,潜在危害大,采用盐酸热循环浸取铅、冷析PbCl2的方法,可使铅的浸出率达95%以上,析出的PbCl2纯度可达95%~96%,为充分利用其铅资源,真正实现无害化提供了依据
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     Using of "Wasted Cold" in Cold Storage
     库“废”回收利用探
     Using of wasted cold in cold storage
     库废利用探
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     On cold fusion
     核聚变
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     Cold Mountain
     《山》
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     RESULTS:
     。 结果:
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  cold separation
Two two-unit diesel fuel hydrotreating plants - L-24-6 (started up in 1964) and LCh-24-7 (started up in 1970) were planned to produce 900,000 and 1,200,000 tons/year using cold separation and a working pressure of 3-3.5 MPa in the system.
      
System-level qualification ambient and cold separation tests verified separation function.
      


This paper introduces a mathematical model for batch processes of crystallization according to the theory of population balance and uses Laplace transformation in its solution. On its basis a dynamic method to measure the kinetics of crystallization is developed and used for the determination and comparison of the change of kinetic parameters with different addition agents for the cooling and salting-out crystallization of NH4C1 in the production of alkali.

本研究根据粒数平衡理论,建立了间歇结晶过程的数学模型,并应用拉氏变换法将该偏微分方程简化为常微分方程求解,在此基础上发展了测定结晶动力学的动态测定法.用该测定法,以联碱生产中NH_4Cl冷析与盐析结晶为典型过程,测定和比较了多种媒晶剂作用下结晶动力学参数的变化,进而提供了一套以结晶动力学数据为依据的评比媒晶剂的新方案,该方案简易可行,有相对的准确性.测定实验过程中,所需的大量结晶样品的粒度分布值,是应用Coulter Counter粒度计测定的,并应用了Gauss-Newton多元非线性统计回归方法处理数据,计算了结晶动力学参数值.

According to the difference of Al_2O_3/SiO_2 ratios, around invariant point of Cevales' Al_2O_3-ZrO_2-3Al_2O_3·2SiO_2 system, six different compositions Were selected and put into experiments involving crystallization of melts in natural and slowly-controlled cooling and quenching conditions respectively. The phase components and compositions of the crystallized specimens were studied by use of XRD, SEM and EDAX. The results indicate that(1) the equilibrium phase relationship is in good agreement with the structure...

According to the difference of Al_2O_3/SiO_2 ratios, around invariant point of Cevales' Al_2O_3-ZrO_2-3Al_2O_3·2SiO_2 system, six different compositions Were selected and put into experiments involving crystallization of melts in natural and slowly-controlled cooling and quenching conditions respectively. The phase components and compositions of the crystallized specimens were studied by use of XRD, SEM and EDAX. The results indicate that(1) the equilibrium phase relationship is in good agreement with the structure feature of phase diagram of Al_2O_3-ZrO_2-3Al_2O_3·2SiO_2 system established by Cevales,and the ternary invariant point is eutectic point; (2)the stable solid solution range of mullite is from A-3S_2 to A-(1.7)S, which coincided with the Al_2O_3 upper limit of 74.3% givin by Aramaki and Roy for the stable mullite solid solution in Al_2O_3-SiO_2 system;(3)the EDAX spectra obtained show no Zr specific line for the single-phase mnllite crystallized from the melts. So problem of the solid solution of ZrO_2 in mullite would require further investigations.

按照Al_2O_3/SiO_2比值,在Cevales给出的Al_2O_3-ZrO_2-3Al_2O_3·2SiO_2系的无变量点附近选择了6个组成,对其进行了熔体自然冷却、缓冷和淬冷析晶试验,并对析晶后的试样进行了XRD、SEM和EDAX分析,结果表明:(1)相平衡关系与Cevales给出的Al_2O_3-ZrO_2-3Al_2O_3·2SiO_2系相图的结构特征吻合得很好,其无变量点为低共熔点;(2)莫来石晶相的Al_2O_3/SiO_2比值波动于A_3S_2-A_(?-7)S之间,与Aramaki和Roy测定的Al_2O_3-SiO_2系莫来石稳态固溶体的Al_2O_3上限含量为74.3%是一致的;(3)析晶的单一莫来石晶相的EDAX能谱中不存在Zr谱线,ZrO_2在莫来石中的固溶问题,应进一步研究。

According to the characteristics of dust from kinescope glass crust, the methods that lead is leached out by hot cycling hydrochloric acid and lead cholride is separated out by cooling way are put forwarded in the paper, by means of which, the key point of the technique to make chromium yellow pigment from lead chloride is solved with the advantage of better environmental and economical benefits.

针对显像管玻壳粉尘的特点,提出了采用盐酸热循环浸取铅,冷析氯化铅产品,实现铅尘无害化的方法;并解决了由氯化铅生产铬黄颜料的技术关键。采用该技术处理此类粉尘不但具有良好的环境效益,而且经济效益显著。

 
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