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Through the calculation of the relative volatility under different solvents and conditions for some azeotropic systems, optimum solvents have been chosen, and the influences of temperature and ratio of solvent on relative volatility were discussed.

通过对甲醇-乙酸甲酯共沸体系在不同萃取剂和不同萃取条件下相对挥发度的计算,选择出适宜的萃取剂,并讨论了温度和溶剂比对相对挥发度的影响。

In this paper,water-soluble ionic liquid BeS was used as extractant for sulfur compounds thiophene,2-methyl thiophene,benzothiophene,dibenzothiophene in simulated fuel and the feasible operation conditions were confirmed by extraction experiments.

选择水溶性的离子液体BeS作萃取剂,对模拟油品中的4种含硫有机物噻吩、2-甲基噻吩、苯并噻吩、二苯并噻吩进行了萃取,确定了适宜的萃取操作条件。

With the adoption of self-designed interpolation ultrasound-assisted supercritical fluid extraction device, supercritical fluid extraction and ultrasound-assisted supercritical fluid extraction were employed to extract coix lacryma-jobi seed oil from coix lacryma-jobi seeds.

采用自行设计的超声强化超临界CO2萃取装置研究了超临界流体萃取和超声强化超临界流体萃取薏苡仁油,并对各自的实验条件进行了优化,比较了在各自优化条件下的产率。

The experimental results are as follows:(1) TBP was suitable to monobasic carboxylic acid solutes , but was not suitable to polybasic carboxylic acid solutes (such as succinic acid and citric acid).

首次采用BP神经网络分析方法预测了不同操作条件下的络合萃取分配系数,最终获得有工业化应用价值的络合萃取剂以及络合萃取技术处理有机羧酸稀溶液的工艺条件。

Was obtained by extracting technology in system of RECl_3-HCl with naphthenic acid- sulphoxide -kerosene and naphtehnic-isooctanol-kerosene asextractants.

阐述了以环烷酸-异辛醇-煤油和环烷酸-亚砜-煤油两种组成不同的有机溶液为萃取剂,在RE-Cl3-HCl体系中制取纯度大于99.999%Y2O3的工艺及萃取分离过程中萃取槽体平衡时稀土分布的情况。

Unoxidated and oxidized wheat stalks were extracted sequentially with CS2, benzene, methanol, acetone and THF, and the extraction solutions were analyzed with GC/MS. The relative contents and compositions of fractional extracts of un-oxidized and oxidized wheat stalks were compared.

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。

Ultrasonic extraction method of valeriana officinalis Linn natural perfume was studied The basic parameters of extraction technology were obtained.

通过超声萃取宽叶缬草天然香料的试验研究,得出了基本工艺参数,探讨了超声萃取过程中的工作机理,试验结果表明:超声萃取天然香料具有较显著的效果,值得进一步研究和开发。

Using the fractional ultrasonic-extraction on four different-rank coals, including lignite, coking coal, low- and mid-metamorphism anthracites by different solvent, isotherm adsorption experiment was made after equilibrium-water accessioned into raw coals and their residues. The change of the adsorption capacity and its affecting factors were analyzed combined with the pore-structure and equilibrium-water content measurement.

采用不同溶剂对褐煤、焦煤、低级无烟煤R(下标 o,max 2.62%以及中级无烟煤R(下标 o,max 3.74%等四个煤级煤样进行分级超声萃取,然后对原煤和萃余物进行平衡水预湿的方法,进行了等温吸附实验,并结合孔隙结构测试和水分含量变化,分析了溶剂萃取后萃余物的吸附性能变化及其影响因素。

By adding back-extractant into the extraction solution, two suspended substances are highly enriched to form two solids: ultra-pure coal and caking components. The coal inbuilt state model and its conception are proposed.

通过向CS2/NMP混合溶剂萃取液中添加反萃取剂的反萃取过程,可以将2种类型的悬浮物高度富集形成固体形态的精煤和黏结组分。

The effct of operating conditions on the recovery of cobalt and manganese acetates was studied.The experimental results indicated that the recovery can arrive to 85%under the conditions of extraction temperature 80℃,extraction time 30—45min,liquid-solid ratio 9∶1 and crystallization temperature 5℃.

研究了操作条件对醋酸钴和醋酸锰回收率的影响,实验结果表明:在萃取温度80℃,萃取时间30~45min,液固比9∶1,结晶温度5℃,分三级萃取结晶的条件下,醋酸钴和醋酸锰的回收率达85%。

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Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气,收缩臀部肌肉;拱起身体,尽量抬起头来,右腿伸直朝向天花板(膝微屈,以避免肌肉紧张)。

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粮食产品的运输费用与5月份相比没有变化,但却比去年同期高8%。

However, to get a true quote, you will need to provide detailed personal and financial information.

然而,要让一个真正的引用,你需要提供详细的个人和财务信息。