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、(PDF) Vinyl Acetate Monomer Process

The following are the primary and side reactions: Figure 3 shows the salient features of the five plants and Table 1 summarizes the data for the chemical species contained in the internal sources...

3、Introduction to the production process of vinyl acetate

The reaction temperature is 170~200℃, the pressure is atmospheric pressure, and the space velocity is 200~400/h. Reaction results: acetic acid single-pass conversion rate is 25~40%, acetylene single-pass conversion rate is 12~16%.

4、Evaluating time to maximum rate (TMR) and self

In this study, we evaluated the thermal decomposition and self-sustaining polymerization reaction of VAM during the propagation stage of the VAM–PVAc process.

Simulation study on the co

Molecular models of four key reactions were constructed from a microscopic point of view. Accurate kinetic parameters of the above four-step reactions were fitted by the transition state theory. Process simulation of VAE products from a macroscopic point of view.

Understanding vinyl acetate polymerisation accidents

The bulk polymerization of vinyl acetate in storage vessels occurs spontaneously under constant temperature conditions, due to a chemical acceleration phenomenon related to the free radical nature of vinyl acetate chain polymerization.

Vinyl acetate synthesis

Almost all vinyl acetate now is produced via the vapor-phase reaction of ethylene and acetic acid over a noble-metal catalyst, usually palladium. The reaction is typically carried out at 175–200 ºC and 5–9 bar pressure.

Self

For vinyl acetate, temperature significantly impacts its self-polymerization behavior. As temperature rises, intermolecular interactions between acetate molecules strengthen, restricting chain segment movement and promoting self-polymerization.

Influence of redox initiator component ratios on the emulsion

Reaction rate control and high conversions at all temperatures were achieved in emulsion copolymerisation of vinyl acetate and Versa®10 by variation of redox initiator component ratios in a broad range of initiation temperatures of −1 °C to 60 °C.

Vinyl acetate: Properties, Production process and Uses

Acetylene undergoes an addition reaction with acetic acid vapor in the presence of a zinc acetate catalyst supported on activated carbon to produce vinyl acetate. The reaction is carried out at a temperature of 170–230°C under a pressure of 35–40 kPa. The reaction equation is as follows:

In the realm of chemistry, temperature is not merely a physical parameter but a critical factor governing chemical reactions. Vinyl acetate, as an essential raw material in organic synthesis, requires precise temperature control during industrial production. This article explores the reaction characteristics of vinyl acetate under varying conditions and its significance for industrial applications.

1. Basic Properties of Vinyl Acetate

Vinyl acetate is a colorless or pale-yellow liquid with an acetic odor. It remains stable at room temperature but tends to decompose at elevated temperatures. Industrially, it serves as a foundational原料 for manufacturing plastics and other polymeric materials.

2. Impact of Reaction Temperature on Vinyl Acetate

2.1 Reaction Rate vs. Temperature

• Increased temperature accelerates molecular motion, thereby enhancing the reaction rate.
• Within an optimal temperature range, higher temperatures significantly boost reaction rates and shorten production cycles.
• Excessive temperatures may trigger side reactions, reducing product quality and yield.

2.2 Thermal Stability vs. Temperature

• Vinyl acetate degrades readily at high temperatures, potentially compromising product purity and performance.
• Temperature control balances product quality and production costs while minimizing energy consumption and environmental impact.

2.3 Safety Considerations

• High temperatures pose risks of equipment overheating and safety hazards.
• Precision temperature control ensures operational safety and equipment stability.
• Effective temperature management mitigates risks of fires and explosions.

3. Temperature Control Strategies in Practice

Temperature control is pivotal in vinyl acetate production and application. Key strategies include:

1. Preheating Phase: Heating reactants and catalysts to reach optimal reaction temperatures before initiation.
2. Constant Temperature Control: Maintaining the reaction system within a target temperature range to sustain ideal conditions.
3. Cooling Systems: Rapid cooling post-reaction to facilitate product separation and purification.
4. Advanced Monitoring: Employing temperature sensors and automated control systems to real-time adjust heating/cooling, ensuring optimal reaction temperatures.

Reaction temperature profoundly influences the reaction rate, product quality, and safety of vinyl acetate. Precision temperature control enhances efficiency, ensures safety, and aligns with sustainable industrial practices. A deep understanding of vinyl acetate’s thermal behavior is vital for advancing chemical manufacturing and environmental stewardship.