Solvothermal Alcoholysis Method for Recycling High-Consistency Silicone Rubber Waste was written by Petrus, Rafal;Utko, Jozef;Gnilka, Radoslaw;Fleszar, Mariusz G.;Lis, Tadeusz;Sobota, Piotr. And the article was included in Macromolecules (Washington, DC, United States) in 2021.Synthetic Route of C9H10O3 This article mentions the following:
In this work, we investigated the potential use of high-consistency silicone rubber (SR), which is a synthetic solid material used in numerous industrial applications, to produce a range of liquid alkoxysiloxane derivatives R(OSiMe2)xOR, with x = 1 (P1), 2 (P2), 3 (P3), and 4 (P4). We describe a simple and convenient solvothermal alcoholysis method for the chem. recycling of post-consumer SR in the presence of fatty alcs. under catalyst-free or catalytic conditions. This process proceeds easily both without and with a catalyst. Alkali-metal aryloxides supported by a methylsalicylato ligand (MesalO) gave the highest conversions of SR to products P1-P4. Magnesium and zinc aryloxides enabled efficient conversions of products P2-P4 to P1. Binary metal catalysts of general formula [M2M’2(MesalO)6] (M = Mg or Zn; M’ = Li, Na, or K), which had a combination of the catalytic properties shown by alkali-metal aryloxides and magnesium/zinc aryloxides, were produced and used to synthesize P1-P4. The results show that magnesium-sodium/potassium aryloxides had the best catalytic activities. Their use led to the formation of two dominant products, namely, P1 and P2, with conversion yields of 79 and 17%, resp. Particular emphasis is placed on the operating conditions and high activity of the catalyst used. Key factors that affect the catalytic activity and reaction mechanism are also highlighted. In the experiment, the researchers used many compounds, for example, Ethyl 2-hydroxybenzoate (cas: 118-61-6Synthetic Route of C9H10O3).
Ethyl 2-hydroxybenzoate (cas: 118-61-6) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Synthetic Route of C9H10O3
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics