Synthesis and Characterization of 12-Tungstosilicic Acid Anchored to MCM-41 as well as Its Use as Environmentally Benign Catalyst for Synthesis of Succinate and Malonate Diesters was written by Brahmkhatri, Varsha;Patel, Anjali. And the article was included in Industrial & Engineering Chemistry Research in 2011.Quality Control of malonic acid dibutyl ester This article mentions the following:
12-Tungstosilisic acid anchored to MCM-41 was synthesized and characterized by various physicochem. techniques such as thermogravimetric anal. (TGA), Fourier transform IR (FT-IR), laser-Raman spectroscopy, diffuse reflectance spectroscopy (DRS), N2 adsorption-desorption, 29Si-magic-angle spinning (MAS) NMR, x-ray diffraction, SEM, and TEM. The total acidity was determined by Bu amine titration The types of acidic sites (acidic strength) were determined by potentiometric titration The use of synthesized material was explored for esterification of diacarboxylic acids with butanol. Influence of various reaction parameters (catalyst concentration, acid/alc. molar ratio and reaction time) on catalytic performance was studied. The catalyst shows high activity in terms of higher yields toward diesters, especially for dioctyl succinate and dioctyl malonate. The catalyst was also regenerated and reused for four cycles. All these characteristics imply the high potential of an environmentally benign catalyst for synthesis of succinate and malonate diesters. In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2Quality Control of malonic acid dibutyl ester).
malonic acid dibutyl ester (cas: 1190-39-2) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Quality Control of malonic acid dibutyl ester
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics