Category: 21876-43-7

Wei, Chenyang; Liu, Zhengping; Tan, Hongwei; Huang, Liyan; Li, Jun published the artcile< A non-metal route to realize the bio-based polyester of poly(hexylene succinate): preparation conditions, side-reactions and mechanism in sulfonic acid-functionalized Bronsted acidic ionic liquids>, Related Products of 21876-43-7, the main research area is surlfuric acid functionalized ionic liquid catalyst polyhexylene succinate preparation.

A biodegradable linear bio-based polyester of poly(hexylene succinate) was effectively prepared in non-metal sulfonic acid-functionalized Bronsted acidic ionic liquids (SFBAILs) as both the catalyst and the polymerization medium, and the processes of polycondensation and post-polycondensation in SFBAILs were also investigated. In addition, the side reactions which were detrimental to the growth of Mw of poly(hexylene succinate) were evaluated and the synthesis mechanism of poly(hexylene succinate) catalyzed by SFBAILs was discussed with the help of DFT calculations The result shows that both the imidazole ring and the sulfonic group on cations of SFBAILs play an important role in the catalytic process.

RSC Advances published new progress about Acidity. 21876-43-7 belongs to class pyridine-derivatives, and the molecular formula is C9H13NO3S, Related Products of 21876-43-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Li, Rui-Jun; Chen, Li; Yan, Zong-Cheng published the artcile< Synthesis of Trimethylolpropane Esters of Oleic Acid Using a Multi-SO3H-Functionalized Ionic Liquid as an Efficient Catalyst>, Reference of 21876-43-7, the main research area is trimethylolpropane oleic triester acidic ionic liquid catalyst.

Biodegradable trimethylolpropane triesters of oleic acid were synthesized by esterification of trimethylolpropane and oleic acid over a multi-SO3H-functionalized strong Bronsted acidic ionic liquid as the catalyst. The results showed that the esterification can proceed satisfactorily over the catalyst at an ambient pressure even without simultaneous removal of water. Under the optimal reaction conditions (temperature: 100 °C, reaction time: 3 h, reactant molar ratio: 3.6:1), and catalyst amount, high conversion rate of trimethylolpropane (99.0%) and selectivity of trimethylolpropane triester (92.1%) were obtained. The ionic liquid was reused six times after the removal of water and no obvious change in catalytic activity was detected. Operational simplicity, high yields along with good reusability makes the multi-SO3H-functionalized ionic liquid a promising catalyst for the esterification of trimethylolpropane with oleic acid.

Journal of the American Oil Chemists’ Society published new progress about Biodegradable materials (polymeric). 21876-43-7 belongs to class pyridine-derivatives, and the molecular formula is C9H13NO3S, Reference of 21876-43-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem