1、Theoretical study on the synthesis of vinyl acetate from acetylene and

In this study, we used density functional theory (DFT) to calculate the feasibility of preparing vinyl acetate (VAc) on four CN non-metallic materials (C 2 N, C 3 N, C 4 N and C 5 N) under the reaction conditions of 1 atm, 393.15–493.15 K at B3LYP/6-31G (d, p) level.

2、Homogeneous

In this work, we used electrochemical probes to study vinyl acetate synthesis, revealing that interconversion of heterogeneous Pd (0) and homogeneous Pd (II) is required for catalysis, with each species playing a complementary role in the catalytic cycle.

3、Catalytic routes and mechanisms for vinyl acetate synthesis

Here, we review studies on catalyst structure and reaction mechanisms for vinyl acetate synthesis via heterogeneous non-oxidative acetylene acetoxylation and homogeneous and heterogeneous...

4、Catalytic routes and mechanisms for vinyl acetate synthesis

Here, we review studies on catalyst structure and reaction mechanisms for vinyl acetate synthesis via heterogeneous non-oxidative acetylene acetoxylation and homogeneous and heterogeneous oxidative ethylene acetoxylation.

Synthesis of Vinyl Acetate Monomer Over PdCu Alloys: The Role of

The in situ reaction by DRIFT-MS identifies the surface formation of main intermediates like palladium acetate monomers and mono and bidentate intermediates, associated to vinyl acetate formation, like vinyl hydrogenated species over PdCu.

how is vinyl acetate made

The result is the formation of vinyl acetate (CH₃COOCH=CH₂) and water (H₂O). The catalyst not only facilitates the reaction but also influences the selectivity and yield of vinyl acetate. Typically, the reaction is carried out at temperatures ranging from 150 to 200°C and at pressures of 5 to 9 atm.

Synthesis of vinyl acetate on Pd

Vinyl acetate (VA) is an important chemical intermediate utilized in paints, adhesives and surface coatings. The oldest VA synthesis process is the gas-phase acetoxylation of acetylene, based upon vapor phase reaction over a zinc acetate catalyst, typically supported on carbon.

Synthesis of vinyl acetate in a liquid phase

ABSTRACT: The article describes the liquid-phase synthesis of vinyl acetate, depending on the nature of the catalyst, the temperature and the feed rate of acetylene, as well as information on the by-products formed during the liquid-phase vinylation.

(PDF) Optimization of Vinyl Acetate Synthesis Process

Taking into account the catalyst deactivation, a mathematical model of the displacement reactor and determination of the main parameters of the tubular reactor was developed for the synthesis...

Vinyl Acetate Synthesis on Homogeneous and Heterogeneous Pd

Vinyl acetate can be synthetized by both homogeneous and heterogeneous processes involving Pd atoms as reaction centers.

In the realm of chemistry, the pursuit of innovation and exploration of the unknown has always been a driving force behind scientific progress. Vinyl acetate, an important organic compound, involves intricate chemical reactions in its synthesis, reflecting chemists' profound understanding and application of natural material transformation principles. This article delves into the synthetic journey of vinyl acetate, from initial raw material selection to final product preparation, uncovering the scientific principles and technical challenges behind this complex process.

The synthesis of vinyl acetate begins with the choice of raw materials. Traditional methods typically use acetaldehyde as the starting material, producing vinyl acetate through addition reactions. with advancements in technology and stricter environmental standards, developing greener and more efficient synthetic pathways has become a new trend in chemical research. Against this backdrop, utilizing biomass resources such as cellulose and starch as raw materials for vinyl acetate synthesis has garnered widespread attention. These bio-based feedstocks are not only abundant and cost-effective but also generate fewer byproducts during production, helping to reduce environmental pollution.

In the specific synthesis process, biomass materials like cellulose or starch must first undergo pretreatment to facilitate subsequent reactions. Pretreatment methods vary, including acid hydrolysis, enzymatic hydrolysis, and others, all aimed at breaking down cellulose’s structure to convert it into reactive monomers. Next, cellulose is depolymerized into smaller molecules via chemical or physical means, which are then transformed into vinyl acetate. This process involves multiple reactions, including dehydration, oxidation, and reduction, each critically impacting the final product’s quality.

Catalysts play an indispensable role in synthesizing vinyl acetate. By lowering the activation energy required for reactions, catalysts accelerate chemical processes and selectively promote specific reaction pathways, optimizing yield and product quality. Selecting appropriate catalysts is key to achieving efficient and eco-friendly synthesis.

Beyond catalysts, reaction conditions significantly influence synthetic efficiency. Factors such as temperature, pressure, and reaction time affect reaction rates and product structures. By precisely controlling these parameters, synthetic efficiency can be improved, and side reactions minimized, resulting in high-quality vinyl acetate.

Waste management and recycling during synthesis are also critical considerations. Since biomass conversion may produce toxic or hazardous substances, adopting environmentally friendly treatment methods and strict waste disposal standards is vital to protecting human health and the environment.

the synthesis of vinyl acetate is a complex and meticulous process involving raw material selection, pretreatment, chemical reactions, catalyst application, reaction optimization, and waste management. With technological advancements and growing environmental awareness, research on bio-based vinyl acetate synthesis continues to deepen. This not only challenges traditional methods but also underscores technological innovation in chemistry. Looking ahead, greener and more efficient synthetic approaches for vinyl acetate are expected to mature, offering greater possibilities and opportunities for the chemical industry’s development.