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1)  two-stage extractor
两级萃取器
2)  stage-wise contavtor
分级萃取器
3)  two-stage extraction
两段萃取
4)  fractional extraction
分级萃取
1.
The fractional extraction on Longkou lignite by different solvent was used for the studying of the occurrence modes and the variations of small molecular phases in coal.
研究煤萃取后的小分子相的赋存方式及其变化规律,用不同溶剂对龙口褐煤进行了分级萃取。
2.
Group separation of soluble organic compounds in wheat stalk can be achieved by fractional extraction.
采用二硫化碳、苯、甲醇、丙酮和四氢呋喃对未氧化和氧化的麦秆进行分级萃取,比较麦秆各级萃取物的相对含量和组成差异,并对各级萃取物的组成进行GC/MS分析。
5)  countercurrent extraction
串级萃取
1.
Theoretical analysis of effective separation factor for multi-component rare earths in countercurrent extraction;
多组分稀土串级萃取有效分离系数的理论分析
2.
First, the relative flow rate of each outlet was calculated from the purification indexes, then the mass balance and extraction equilibrium of countercurrent extraction were studied.
研究了多组分、多出口稀土串级萃取体系静态优化设计过程的精确计算方法。
3.
Based on our previous work about the static design algorithm for the multi-component and multi-outlet rare earth countercurrent extraction, the computational program under 32-bit Windows operation system was composed and verified by the dynamic simulation for different rare earth separation systems with satisfactory results.
基于多组分多出口稀土串级萃取优化参数的静态设计算法,设计了相应的计算程序,采用该程序针对某稀土分离实例进行了静态参数计算,并对最优化工艺参数进行了动态仿真验证。
6)  multistage extraction
多级萃取
1.
The vapour-liquid equilibrium composition on the various plates and the theoretical plate number of the plate tower, reaction volume of multistage continuous stir reactor and the theoretical stage number of multistage extraction can be calculated by this method.
介绍了Excel中填充柄的特点,并对其在板式精馏塔各块塔板上的汽-液平衡组成与理论板数、串联全混流反应器的反应体积和多级萃取的理论级数应用中给出了详细的操作步骤和计算实例。
补充资料:Dorr分级器
分子式:
CAS号:

性质:适用于粗粒原料的固液萃取设备,或者是用以洗去黏附的溶液或溶质。常用于冶金工业中使固体颗粒按其大小分级。此种机械装置中,固体引入到一个具有倾斜底的槽子中,槽中装有溶剂。用机械方法使槽内的耙子做往复运动和圆周升举运动。耙动固体物由底部向上,由槽上部排出。液体在槽子深的一端溢出。由于槽内耙子的搅拌,全槽中液体的溶质浓度是均匀的。为了进行多级连续逆流操作,可将几个分级器串联起来操作。

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