Potassium and antimony mixed oxides were obtained by calcination of the commercial potassium-antimony tartrate trihydrate K(SbO)C₄H₄O₆.3H₂O at temperatures ranging from 300 to 800 °C. The structure varied with temperature as revealed by XRD characterization. The modifications occurring during the calcination process were also studied by FT-IR and DRS spectroscopies, along with by thermal analysis (TG/DTG). The solids were tested in 2-propanol decomposition at 200 °C, used as probe reaction for the investigation of acid-basic and redox properties. The catalytic activity was function of the calcination temperature and the best 2-propanol conversion was achieved with the tartrate precursor calcined at 500 °C that crystallizes forming KSbO₃ as main phase along with K_0.51Sb_2.67O_6.26 as secondary phase. Under N₂ the activity reached the maximum after 10 min, 80% of 2-propanol conversion was the highest value, over the sample calcined at 500 °C, but rapidly decreased with time on stream and almost declined after 1 h. In the presence of air in the reaction mixture, 85% of 2-propanol conversion was achieved at 200 °C, after 20 min under stream, with the most active sample. By increasing the calcination temperature above 500 °C, the conversion decreased, especially for the sample calcined at 800 °C showing the worse conversion, although the stability over time increased, likely due to the achievement of stable crystalline phases and crystallite sizes. In all cases, the 2-propanone selectivity was close to 100%. This behaviour confirmed the occurrence of a dehydrogenation reaction involving the basic sites typical of KSbxOy oxides along with the redox couple Sb(V)/Sb(III).

通过煅烧市售酒石酸锑锑酸钾三水合物K（SbO）C ₄ H ₄ O ₆ .3H ₂获得钾和锑的混合氧化物。O在300至800°C的温度范围内。XRD表征表明，结构随温度变化。还通过FT-IR和DRS光谱学以及通过热分析（TG / DTG）研究了煅烧过程中发生的修饰。固体在200°C的2-丙醇分解中进行测试，用作探查酸碱性和氧化还原特性的探针反应。催化活性是煅烧温度的函数，在500°C下煅烧的酒石酸盐前体可实现最佳的2-丙醇转化率，其结晶形成KSbO ₃作为主相以及K _0.51 Sb _2.67 O _6.26作为副相。N _2以下活性在10分钟后达到最大值，在500°C下煅烧的样品中80％的2-丙醇转化率是最高值，但随着生产时间的增长迅速下降，并在1 h后几乎下降。在反应混合物中存在空气的情况下，在流动状态下经过20分钟后，活性最高的样品在200°C下达到了85％的2-丙醇转化率。通过将煅烧温度提高到500°C以上，转化率下降，特别是对于在800°C煅烧的样品，转化率更差，尽管随着时间的推移稳定性会增加，这可能是由于获得了稳定的结晶相和微晶尺寸。在所有情况下，2-丙酮的选择性均接近100％。