2082-81-7Relevant articles and documents
Runge-Kutta analysis for optimizing the Zn-catalyzed transesterification conditions of MA and MMA with diols to maximize monoesterified products
Akebi, Shin-Ya,Kato, Taito,Mashima, Kazushi,Nagae, Haruki,Oku, Tomoharu,Yonehara, Koji
, p. 6975 - 6986 (2021/11/17)
Terminal hydroxylated acrylates and methacrylates were prepared by catalytic transesterification of acrylates and methacrylates with diols catalyzed by a system of a tetranuclear zinc alkoxide, [Zn(tmhd)(OMe)(MeOH)]4 (1a), with 4 equiv. of 2,2′-bipyridine (L1). The reaction time to reach the equilibrium state was analyzed by kinetic studies and a curve-fitting analysis based on the Runge-Kutta method for optimizing the best reaction conditions for mono-esterification. In addition to these kinetic analyses, DFT calculations estimated a proposed mechanism of the catalytic transesterification. This journal is
1,4-butanediol dimethylacrylate preparation method
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Paragraph 0013-0034, (2019/01/08)
The invention provides a 1,4-butanediol dimethylacrylate preparation method. Under the action of a solid catalyst acid sodium bisulphate, in the presence of a polymerization inhibitor and an azeotropic water-carrying agent, 1,4-butanediol and methacrylic acid are reacted at 80 to 90 DEG C for 4 to 7 hours for synthesis to obtain 1 , 4-butanediol dimethacrylate; the molar ratio of methacrylic acidto 1,4-butanediol is 2.10:1, and the amount of n-hexane in the azeotropic water-carrying agent accounts for 50% of the total mass of a reactant, the solid acid catalyst accounts for 3% of the total mass of the reactant, and the amount of the polymerization inhibitor phenothiazine accounts for 0.05% of the total mass of the reactant. the catalyst used in the synthesis method of 1,4-butanediol dimethacrylate is cheap, stable, easy to separate from products, and does not corrode equipment, the 1,4-butanediol dimethacrylate achieves the purpose of clean production, has high yield, and has broad application prospects.
METHOD FOR THE PRODUCTION OF (METH)ACRYLIC ESTERS
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Page/Page column 5, (2011/06/23)
The present invention relates to a process for preparing (meth)acrylates, comprising the transesterification of a low-boiling ester of (meth)acrylic acid with a reactant alcohol in the presence of catalysts, which is characterized in that the transesterification is catalysed by a basic ion exchanger.