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本文證實溶液酸度对乙黃原酸钼錯合物的穩定度有影響。溶液的酸度最好調節在pH1.11—1.56之间。該钼錯合物生成后在水中僅穩定一分钟,故應在此期間以內用有機溶劑抽提。在丙酮-水溶液中,該钼錯合物亦不穩定。本文試驗了十種有機溶劑作抽提劑,比较了乙黄原酸钼錯合物在其中的穩定性和不同量钼的抽提效果。找出對該钼錯合物的穩定性而言,以石油醚和甲苯為最好。苯、三氯甲烷、四氯化碳和氯代苯次之(在一定的時間內可以使用),而乙醚、異戊醇、乙酸戊酯和異丁基乙酮,則均不適於作抽提之用。对抽提效果而言,氯代苯在钼含量0—0.4毫克範圍內遵循Beer定律;苯及甲苯次之;三氯甲烷或四氯化碳又次之;石油醚最差。根據上述,擬推荐甲苯作為最适宜之抽提劑。
This article confirms that the solution acidity has an effect on the stability of the molybdenum disulfide complex. The acidity of the solution is preferably adjusted between pH 1.1-1.56. The molybdenum complex is stable in water for only one minute after it is formed, so it should be extracted with organic solvent within this period. In acetone-water solutions, the molybdenum complex is also unstable. In this paper, ten organic solvents were tested as extraction agents to compare the stability of molybdenum disulfide molybdenum complex and the extraction efficiency of molybdenum. Find the stability of the molybdenum complex in terms of petroleum ether and toluene as the best. Benzene, trichloromethane, carbon tetrachloride and chlorobenzene (which can be used within a certain period of time), while diethyl ether, isoamyl alcohol, amyl acetate and isobutyl ketone are not suitable for extraction Use. For the extraction effect, chlorobenzene obeys Beer’s law in the range of 0-0.4 mg molybdenum; followed by benzene and toluene; followed by trichloromethane or carbon tetrachloride; and petroleum ether is the worst. According to the above, it is proposed to recommend toluene as the most suitable extraction agent.