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transition metallic
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    The techniques of separation contain chemical reaction separation, adsorption separation and separation using some metallic oxides or transition metallic complexes.
    分离方法包括化学反应分离、吸附分离以及利用某些金属氧化物或过渡金属盐络合物分离的方法等。
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  transition metallic
[NH3(CH2)3NH3]2[Ni(HP2O7)2(H2O)2] ? 4H2O (NiDAP) is a new diphosphate of transition metallic and organic cations obtained from a mixture of H4P2O7, 2NiCO3? Ni(OH)2 ? 4H2O and NH2(CH2)3NH2 in a 1:1/6:1 molar ratio.
      
Hazard identification and characterisation Chemistry Zinc is an abundant group IIB post-transition metallic element.
      


The purpose of this study was to clarify the influence of demineralization on gasification reactivity of coal chars catalyzed by Fe or Ni salts. Metallic salts loading was performed by impregnation method with an nitrate solution. The gasification reactivity was:investigated by performing temperature - programmed reactions (TPR) with coal chars prepared at the same carbonization conditions under 0.1 MPa CO2 stream. The results showed that Ca element led to higher gasification reactivity of chars loaded with...

The purpose of this study was to clarify the influence of demineralization on gasification reactivity of coal chars catalyzed by Fe or Ni salts. Metallic salts loading was performed by impregnation method with an nitrate solution. The gasification reactivity was:investigated by performing temperature - programmed reactions (TPR) with coal chars prepared at the same carbonization conditions under 0.1 MPa CO2 stream. The results showed that Ca element led to higher gasification reactivity of chars loaded with iron, but Si had no influence on the catalysis by iron. X- ray diffraction (XRD) has been used to determine the chemical states of metallic catalysts dispersed on the surface of coal chars. The different behaviour of Ca and Si clement may be due to their different influence on the reduction or dispersion of transition metallic salts during py-rolysis, i. e., the existence of calcium benefited the reduction of iron and the dispersion of Ni, but Si existed as SiOa independently, and hadn' t formed the unsoluble substances with metallic catalysts.

在先锋褐煤的原煤、脱矿物质煤中掺加一定量的金属Fe、Ni、Ca的硝酸盐,在固定床管式碳化炉上,600℃制焦。XRD技术测试了煤焦中金属元素的存在形态,程序升温法测定了上述煤焦的CO_2气化反应活性。结果表明,Si对Fe催化煤焦—CO_2气化反应没有影响,而Ca对Fe、Ni的催化行为有促进作用,原因在于Ca元素有助于Fe物种的还原和Ni物种在煤焦表面的分散,而Si元素以SiO_2的形式分散在煤焦中,未与Fe形成不溶体,因而不影响Fe的催化作用。

The methods of separation and analysis of naphthenic acids in crude oil were reviewed. The techniques of separation contain chemical reaction separation, adsorption separation and separation using some metallic oxides or transition metallic complexes. MS was mainly introduced in analytical methods.

综述原油中环烷酸的分离与分析方法。分离方法包括化学反应分离、吸附分离以及利用某些金属氧化物或过渡金属盐络合物分离的方法等。分析方法主要叙述了质谱分析法。

 
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