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首页> 外文期刊>Catalysis science & technology >Facile sulfolane-modified resins for enhanced dimethoxymethane carbonylation
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Facile sulfolane-modified resins for enhanced dimethoxymethane carbonylation

机译：简单sulfolane-modified树脂增强二甲氧甲烷羰基化

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Herein, a simple method was developed for the first time to pretreat sulfonic acid resin-based catalysts using different solvents (such as n-hexane, toluene, acetone, methanol, dimethyl sulfoxide, and sulfolane), and the as-treated resins were applied in DMM carbonylation. Except for sulfolane, the treatment solvents with a higher dipole moment resulted in a higher turnover number (TON) but lower DMM conversion and MMAc selectivity. SA(resin)-sulfolane-393 K exhibited excellent activity and stability for 50 h with an STY of 3.15 mmol(MMAc) (gcat h)(-1) and nearly 100% MMAc selectivity. The Arrhenius plot of SA(resin)-sulfolane-393 K was generated from the reaction rate data at various temperatures, and the apparent activation energy was calculated to be 18.39 kJ mol(-1). Karl Fischer analysis, in situ FT-IR analysis of CO adsorption, and static CO adsorption method indicated that the residual H2O in SA(resin) was significantly reduced and the CO adsorption capacity was obviously enhanced. The nitrogen adsorption-desorption isotherms, FT-IR spectra, and SEM and EDX-mapping images of SA(resin)-sulfolane-393 K proved that a larger average pore diameter and pore volume were generated, and sulfolane indeed entered the resin and changed the chemical composition of SA(resin). The FT-IR spectra of the pyridine pre-adsorbed samples and Hammett acidity function (H-0) confirmed that SA(resin)-sulfolane-393 K exhibited a stronger acid strength. The unusual activity and stability of SA(resin)-sulfolane-393 K are attributed to its stronger acid strength, low H2O content and excellent CO adsorption capability.
机译：在此,一个简单的方法是发达的第一次预处理磺酸树脂使用不同的溶剂(如催化剂正己烷、甲苯、丙酮、甲醇、二甲亚砜和环丁砜),as-treated树脂是应用于DMM羰基化。对环丁砜溶剂与治疗高偶极矩导致更高转化率(吨),但较低的数字转换和MMAc选择性。表现出优秀的活动和稳定503.15 h的猪圈更易(MMAc) (gcat h) (1)MMAc选择性近100%。SA(树脂)环丁砜- 393 K的生成在不同温度下的反应速率数据,和表观活化能进行了计算18.39 kJ摩尔(1)。原位红外光谱分析CO的吸附和静态的吸附法表明,残留水在SA(树脂)显著降低CO吸附能力明显增强。等温线、傅立叶变换红外光谱、扫描电镜和EDX-mappingSA(树脂)环丁砜- 393 K的图片证明更大的平均孔径和孔隙体积生成,环丁砜的确进入了树脂和化学成分的改变SA(树脂)。pre-adsorbed样品和哈米特酸性功能(H-0)证实,SA(树脂)环丁砜- 393 K表现出更强的酸强度。活动和SA的稳定(树脂)环丁砜- 393K是由于其较强的酸强度,低水含量和优秀的吸附能力。

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