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Stone is from rock, and rock is consist of the mineral, the mineral contain iron is the source of the iron in stone products , iron element spread widely in natural world, but most of them appear to be compound, iron element is belong to medium activity metal, under high temperature is easily to be strongly acted with oxygen, sulfur, chlorine, and easily dissolve in abio-weak acid solution and strong hydrochloric acid solution, at the same time, the strong alkali solution also corrade the iron.

石材是岩石经加工后所产生的制品,岩石是由矿物组成的,其中含铁矿物是石材中铁质的来源。铁元素在自然界中分布甚广,但大多以化合物的方式出现,由于铁元素属中等活泼性的金属,在高温下易和氧、硫、氯等元素发生强烈反应,并易溶于无机稀酸和浓盐酸的溶液中,同时浓碱溶液也易侵蚀铁。

The diluent solution of glyoxylic acid and oxalic acid was used as the separation object.TOA (in n-octanol) was used as the solvent. The extraction characteristics of single acid and two-acid solution were studied,and the influence of pH and the concentration of complexing agent on the distribution coefficients were measured. The suitable mathematic models were proposed to describe the relationship between TOA and carboxylic acid based on assumed extraction reaction in organic phase.

摘 要:以草酸和乙醛酸的稀溶液为分离对象,采用三辛胺为萃取反应剂、正辛醇为稀释剂,研究了单溶质、双溶质有机酸的萃取分离特性,测定了溶液pH值、萃取反应剂的浓度等因素对双溶质有机酸萃取的影响,提出了萃取的化学反应发生在有机相中的假定,建立了TOA萃取草酸的数学模型。

The diluent solution of glyoxylic acid and oxalic acid was used as the separation object. TOA (in n-octanol) was used as the solvent. The extraction characteristics of single acid and two-acid solution were studied, and the influence of pH arid the concentration of complexing agent on the distribution coefficients were measured. The suitable mathematic models were proposed to describe the relationship between TOA and carboxylic acid based on assumed extraction reaction in organic phase.

以草酸和乙醛酸的稀溶液为分离对象,采用三辛胺为萃取反应剂、正辛醇为稀释剂,研究了单溶质、双溶质有机酸的萃取分离特性,测定了溶液pH值、萃取反应剂的浓度等因素对双溶质有机酸萃取的影响,提出了萃取的化学反应发生在有机相中的假定,建立了TOA萃取草酸的数学模型。

On the contrary, the anionswith greater deformability would promote a rise intemperature by induced dipole relaxation, In thepresence of microwave field, the conductivity of thedilute solution were higher than one in lack of theexternal field.

上述两种相反的作用可以通过离子的极化参数来定性衡量;此外稀溶液在微波场中的电导率均高于常规条件下的值,这是由于在微波场的作用下,离子氛的松驰力降低,从而使得溶液的电导增加,这可以看成是微波非热效果的具体现。3。

In this new technology,on the basis of substituting flotation froth of high intensity scavenger concentrate for high intensity middlings,the desired RE concentrate can be obtained easily,which does not take any special measures of removing surplus reagents and adopts the current technological process taken by workshop of RE ore dressing,and the cost of flotation reagents per ton RE concentrate can also be reduced about 50%.

将生产中所用的稀土浮选原料强磁中矿更换为强磁扫选精矿的反浮泡沫,不需特别的脱药措施,只采用稀选车间现有的工艺流程和浮选药剂组合方案,即可获得所需的稀土精矿,使每吨稀土精矿的成本降低一半左右。

The main idea is tolift the band degeneracy at high symmetry points in the Brillouin zone of crystals bylowering the structure symmetry of crystal.One way is introducing nonspherical atomconfigurations,another is introducing anisotropy in atom dielectricity.

设计的核心思想是通过降低光子晶体结构的对称性,消除光子能带在晶体的布里渊区高对称点上的本征简并,以获得完全的带稀我们采用两种方法,一种是将晶体的原子做成非球对称,另一种用各向异性的颗粒球做晶体原子。

To broaden desert shrub new utilizing fields, accelerate desert shrub developing to the direction of high added-value and high benefit, the paper studied on the liquefaction of Salix, Caragana and Poplar in the presence of Phenol under sulfuric acid catalysis. The optimum processing parameters for Salix, Caragana and Poplar liquefaction and resinification were investigated. The effect of molar ratio of formaldehyde to liquefied products and NaOH to liquefied products on the character and glue strength of liquefied products resin was studied.

摘 要:为了开辟沙生灌木资源新的应用领域,促使沙生灌木资源的利用向高附加值、高效益的方向发展,本文以苯酚作液化剂,以稀硫酸作催化剂对沙柳、柠条和杨木进行液化实验,分析了反应温度、液比、催化剂用量及液化时间对液化反应的影响;并研究了沙柳、柠条和杨木液化产物树脂化合成工艺和配方,分析了不同的甲醛与液化产物摩尔比以及氢氧化钠与液化产物摩尔比对沙柳、柠条和杨木液化产物树脂的各项性能的影响。

The hydrophobic monomers such as glycidyl octyl dimethylammonium chloride, glycidyl dodecyl dimethylammonium chloride, glycidyl tetradecyl dimethylammonium chloride was applied to the hydrophobic modification of two kinds of sodium cellulose sulfate in isopropyl alcohol under 65℃.The success of synthesis of a kind of novel amphoteric surfactant by FT-IR and NMR. 3. By the measuring surface tension of all kinds of amphoteric polymeric surfactants based on cellulose, the critic micelle concentration was obtained such as 0.4wt%、0.3wt%、0.25wt% and corresponding surface tension was about 30mN/m

通过动态接触角测量仪确定了各种纤维素表面活性剂的表面张力和临界胶束浓度,结果表明该类表面活性剂可与小分子表面活性剂的降低表面张力的能力相媲美,最低可达28.41 mN/m,随着疏水基中碳链的增长,降低表面张力的能力下降,而临界胶束浓度从0.4wt%相应降低0.25wt%;应用环境扫描电镜确定其不同浓度胶束形态,结果表明在较低浓度下形成棒状单分子胶束,随着浓度的升高,单分子胶束逐渐聚集成树枝状胶束,进一步提高浓度,则聚集成网状结构;此外,采用了高级流变仪对其溶液的流变性质进行了研究,结果表明其溶液属于剪切变稀流体,是高分子溶液特有的性质。

Bis (P—bromobenzylamino) ethane and 1,2—bis (m—Iodobenzylamino) ethane may be prepared by condensation of the corresponding halo benzaldehyde with ethylenediamine and followed by catalytic hydrogenation of the Schiff's bases over Pto_2 in glacial acetic acid solutions: Both Ⅱa and Ⅱb may react in neutral mediam with aldehydes to form well—defined crystalline tetrahydro—imidazole, which may be served as derivatives of identification for aldehydes: Under the same condition, however,Ⅱb may ...

用1,2-二乙烷与二十余种醛类作用,得到有固定熔点的晶体衍生物,它们的熔点分布在85—210℃之间,产率为40—96%,这试剂与甲基酮类在相同条件下无反应,因此,它可作为鉴定醛类的专属试剂。 2。上述衍生物用稀盐酸在室溫处理,能发生水解,可以定量地收回原来的醛,因此这试剂又可作为分离醛类的试剂。 3。上述衍生物可以用非水滴定法半微量地测定其分子量可作为鉴定醛类的另一项参考数据。 4.1,2-二乙烷与醛类能生成晶体衍生物,但这试剂也与甲基酮在同样条件下发生反应,所以不适合作为鉴定醛类的专属试剂。

According to the theoretical analysis,the results show that the fresh air dehumidified before mixed with return air is more energy-saving among many kinds of realization shapes.Indoor exhaust used as regeneration air can also reduce the total energy consumption of the system.It may enhance the regeneration property when the recuperator is adopted to absorb energy to preheat the dilute liquid.

对此空调系统进行理论分析,得出如下结论:在溶液除湿蒸发冷却空调系统的多种实现形式中,新风经除湿后与回风混合比新回风混合后再除湿节能;将室内排风返回溶液再生器,进行热湿交换,既可加强对处理空气的预冷,回收排风冷量,又可提高再生器的效率,降低系统能耗;把回热器吸收除湿浓溶液中的部分热量用于溶液再生器的稀溶液预热,可以提高溶液的再生性能。

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Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时,他斥责什叶派民兵领导人对中央集权的挑衅行为。

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