Wan, Qiaoqiao; Wang, Xinyue; Zhao, Bei; Zhao, Guoming; Zhao, Guangzhen; Gao, Enyuan; Gong, Yuxiu; Yu, Haibin; Wang, Xing; Liu, Di; Tian, Yuanyu published an article in 2021. The article was titled 《Influence of calcination temperature on the cooperative catalysis of base sites and gold nanoparticles on hydrotalcite-supported gold materials for the base-free oxidative esterification of 1, 3-propanediol with methanol to methyl 3-hydroxypropionate》, and you may find the article in Reaction Kinetics, Mechanisms and Catalysis.Quality Control of Methyl 3-hydroxypropanoate The information in the text is summarized as follows:
Magnesium-aluminum hydrotalcite (HT) supported gold catalyst (1 wt% Au/HT) was prepared by the colloid-deposition method and characterized by inductively coupled plasma at. emission spectroscopy (ICP-AES), X-ray diffraction (XRD), nitrogen adsorption, transmission electron microscopy (TEM), XPS and Hammett indicator method. The effects of calcination temperature of catalyst and support on the catalytic performance of aerobic oxidative esterification of 1,3-propanediol with methanol to Me 3-hydroxypropionate (3-HPM) under base-free condition were studied. The results showed that the conversion of 1,3-propanediol and the selectivity of 3-HPM increased first and then decreased with the increase of calcination temperature of catalyst and support. The optimal calcination temperature of catalyst and support is 150°C. Under the optimum preparation conditions, the conversion of 1,3-propanediol and the selectivity to 3-HPM are 96.2% and 94.9%, resp. In addition, the 1 wt% Au/HT catalyst could be effectively recovered by calcining at 150°C in air atm., and the performance of the catalyst does not decrease significantly. The performance of the catalyst is higher than that reported previously. The structure of magnesium-aluminum hydrotalcite with appropriate d. and medium strength base sites and small metallic Au particles are favorable for the selective oxidative esterification of 1,3-propanediol to 3-HPM. The experimental part of the paper was very detailed, including the reaction process of Methyl 3-hydroxypropanoate(cas: 6149-41-3Quality Control of Methyl 3-hydroxypropanoate)
Methyl 3-hydroxypropanoate(cas: 6149-41-3) belongs to esters with low molecular weight are commonly used as fragrances and found in essential oils and pheromones. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Quality Control of Methyl 3-hydroxypropanoate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics