k2co3

Np continuously decreases as concentration of K2CO3 increasing .

Np随碳酸钾浓度的增加持续变小。

The study can be referred to the ' Technology of Extracting K2CO3 from Insoluble Potassium ' .

因此，该研究主要是为非水溶性钾矿提钾技术中钾、钠的分离工艺提供理论参考。

A white salt ( K2CO3 ) that is basic in solution ; used to make glass and cleansing agents .

一种白色的盐（KCO），在溶液中呈碱性，用于制玻璃和清洁剂。

To add appropriate amount of K2CO3 may effectively promote the synthesis of C2 alcohol and prohibit the formation of water and hydrocarbon .

添加适量K2CO3，可以有效促进C2~+醇的生成及抑制烃和水的产生。

Na2CO3 、 K2CO3 and the two blends were added into wheat flour in different properties to understand the influence of the dough quality properties .

Na2CO3、K2CO3及其二者的混合物分别以不同的添加量添加到面粉中，通过Brabendar粉质仪、拉伸仪的测定，了解它们对面团品质特性的影响。

The results suggested that the for-mation of K2CO3 and molten KNO3 phase during the reaction course promoted the catalytic activities obviously .

在反应过程中，KNO3熔融状态的形成和K2CO3的生成，使催化活性明显提高。

So the multiplex composite nano-additives were prepared by the two-step synthesis method with the precipitator of K2CO3 at appropriate pH value .

从而确定了以碳酸钾为沉淀剂在一定pH值时将八种添加剂采用分两步共沉淀的方法制备了复合纳米添加剂。

The microvoid activated carbon with large specific surface area was prepared from reed pulping black liquor through chemical activation with K2CO3 as activator .

以芦苇制浆黑液木质素为原料，利用K2CO3为活化剂通过化学活化制备出以微孔为主的大比表面积活性炭。

The B2O3 flux alone made the solution very viscous , while using K2CO3 alone led to high saturation temperatures and marked volatility of the solution .

仅使用B2O3溶剂使得溶液非常粘稠，而仅使用K2CO3会达到高的饱和温度，表示了溶液的挥发性。

The stability of sulfates is also influenced by the state of K species , the decomposition of K2CO3 has decreased the reduction temperature of the sulfates .

K物种的存在形式影响硫酸盐的稳定性，K2CO3的分解降低了硫酸盐脱附温度。

The effects including catalyst preparation ( drying temperature , K2CO3 loading , catalyst concentration and calcination temperature ) and the ratio of pseudoionones were investigated by orthogonal experiment .

并通过正交实验探讨了催化剂的干燥温度、催化剂的负载量、催化剂的用量以及催化剂的焙烧温度对假紫罗兰酮收率的影响。

Investigation on basicity of k2co3 / al_2o_3 and kno_3 / al_2o_3 with probe butene isomerization reaction combined with IR and co_2-std methods

丁烯异构化探针反应结合IR及CO2-STD法研究K2CO3/Al2O3和KNO3/Al2O3的碱性

After wash and calcination , the recovered catalyst can be regenerated with the same crystal texture as the fresh K2CO3 , and shows the catalytic activity .

回收的催化剂在经过洗涤与焙烧之后可以重新获得K2CO3的晶形特征，具有催化活性。

" Potash : Name used for various inorganic compounds of potassium , chiefly the carbonate ( K2CO3 ), a white crystalline material formerly obtained from wood ashes . "

钾碱：泛指钾的各种化合物。主要指碳酸盐（K2CO3），呈白色晶体，以前从木材的灰烬中提

We initiated the idea of using membrane composed of polymer matrix and embedded metal carbonate as the electrolyte in DMFC and K2CO3 electrolyte membranes have been prepared through three methods .

我们提出了将碳酸盐聚合物膜用于DMFC的新思路并采取三种方法制备出K2CO3掺杂型电解质膜。

A small amount of NaOH , Na2CO3 , KOH and K2CO3 was added to Ca-based absorbents respectively by a special method and modified absorbents were obtained .

微量的NaOH、Na2CO3、KOH和K2CO3以特殊方式添加到石灰类物质中以后形成改性石灰类吸收剂。

We found NaiCOs was the better precipitation agent than K2CO3 CO ( NH2 ) 2 ( NH4 ) 2CO3 and NaOH .

沉淀工艺研究了沉淀剂和沉淀方式及前驱物的影响，结果表明不同沉淀剂得到催化剂活性顺序为：Na2CO3＞K2CO3＞CO（NH2）2＞（NH4）2CO3＞NaOH。

Other solvents ( such as toluene , dioxane ) and bases ( such as K2CO3 , NaOAc ) lead to reduced activity and lower yields .

使用其它溶剂（如甲苯、1，4-二氧六环等），或其它碱（如碳酸钾、乙酸钠等），反应产率则明显下降。

Experimental results showed that with the increase of the solubility of the alkali carbonate ( K2CO3 > Na2CO3 > Li2CO3 ), the subsequent production of alcohols ranged from 2.0 mg .

结果表明，碱金属碳酸盐类助剂作用随溶解度的增加而明显增强，总的甲醇和乙醇的收率顺序为K2CO3＞Na2CO3＞Li2CO3。

K2CO3 and Na2CO3 as the best accepted catalysts of coal gasification showed high catalytic activity for the three different types of coals , and Li2CO3 showed some role in lowering peak temperature of gasification .

K2CO3和Na2CO3作为公认的煤气化最好的催化剂对这三种煤都表现出了很高的催化活性，而Li2CO3对降低气化峰温有一定作用。

With the increase of K2CO3 / KOH ratio ( 1 , 2 , 3 ), the specific surface area of the powder registers remarkable downward tendency due to the greater concentration of the mineralizer .

随着K2CO3/KOH比率（1,2,3）的增加，粉体的比表面积由于矿化剂浓度的增加而下降的趋势更加明显。

The viscosity of Na2CO3 、 K2CO3 、 Li2CO3 and their mixture was calculated in this paper . It was concluded that , the viscosity of molten carbonate salts change greatly with the increasing of temperature .

计算了Na2CO3、K2CO3、Li2CO3及其混合熔融体的粘度，结果表明，碳酸盐熔融体的粘度随温度的升高而降低，并且变化明显。

Synthesis of thiophene via dehydrogenation and sulfuration of n-butanol were studied . K2CO3-Cr2O3 / γ - Al2O3 and K2CO3 / γ - Al2O3 catalysts were compared and loadings of active component optimized .

采用正丁醇与二硫化碳混合进料脱氢硫化制备噻吩，探讨了两种催化剂体系K2CO3-Cr2O3/γ-Al2O3和K2CO3/γ-Al2O3，对二者进行比较并对活性组分的负载质量分数进行了优选。

The H / D exchange of the benzothiazole has also been carried out . The result indicated that the hydrogen at C-2 of the heterocycle can be removed in the presence of K2CO3 without the copper catalyst .

无催化剂条件下苯并噻唑的H/D交换实验，证实了碳酸钾可以直接夺取杂环2-位碳上的氢，无需催化剂的辅助。

The liquid-liquid equilibrium data for system of acrylonitrile-water-potassium carbonate was determined at 25 ℃ . The results showed that the concentration of acrylonitrile could reach 98.85 % when the concentration of K2CO3 in the water phase was equal to 52.50 % .

测定了丙烯腈-水-碳酸钾体系在25℃时的液-液相平衡数据，相平衡结果表明当水相中K2CO3浓度为52.50%时，有机相中丙烯腈的浓度高达98.85%。

Molecular simulation was used to investigate the reaction mechanism , also the reaction thermodynamics and kinetics were calculated theoretically , strengthening an in-depth understanding of the Kolbe-Schmitt reaction . Experimental and computational methods were used to explore the hybrid catalytic mechanism of K2CO3 .

使用分子模拟的方法对反应机理以及反应热力学和动力学进行了理论计算；对催化机理进行了实验与理论的探索，加深了对Kolbe-Schmitt反应的了解。

Results show : with the increase of the concentration of K2CO3 / KOH , the specific surface area of ZrO2 ( 3Y ) powder decreases , equivalent specific surface diameter for ring pellet reveals upward tendency and crystalline size becomes larger ;

实验结果表明：随着K2CO3/KOH浓度（0.1M、0.3M、0.5M、0.7M）的增加，ZrO2（3Y）粉体的比表面积呈下降趋势，对应的等比表面积当量球径呈上升趋势，晶粒尺寸增大；

Fe : Stoichimetric Lithium Niobate single crystals with varied Fe concentration were grown by the Czochralski method under the assistance of K2CO3 flux , and the as-growth crystals have no macroscopic defects and have a perfect optical homogeneity .

采用助熔剂提拉法生长出无宏观缺陷、光学均匀性好的铁掺量不同的化学计量比铌酸锂晶体，研究总结出了最佳生长工艺参数。

It order to prepare stable emulsifier-free emulsion , potassium carbonate was charged to neutralize carboxylic acid with the molar ratio of K2CO3 to carboxylic acid being 2:1 . The emulsification of the block copolymer was more facilitated when acetone was added .

当加入与羧酸根的摩尔比为2：1的K2CO3时，乳液聚合能够稳定进行。加入丙酮也有利于嵌段共聚物的乳化。

The reagent reacted with fatty acids in the presence of K2CO3 catalyst at 90 ℃ for 40 min in N , N-dimethylformamide solvent to give maximum and constant fluorescence intensity with the addition of 7-fold molar reagent excess to total molar fatty acids .

90℃下在DMF溶剂中以K2CO3作催化剂，选取衍生试剂摩尔数为脂肪酸的7倍，衍生反应40min可获得稳定的荧光产物。