1、Technical Support Center: Purification of Crude Vinyl Acetate
This protocol is intended for the general purification of crude vinyl acetate to remove impurities with significantly different boiling points, such as acetic acid and heavy ends.
2、Removal kinetics of vinyl acetate under aerobic and anoxic conditions
The Haldane biokinetic equation, widely preferred for toxic substances, was used to determine the relationship between the specific growth rate and vinyl acetate concentrations in removing vinyl acetate under aerobic conditions.
3、techniques for purification of vinyl acetate monomer from acetic acid
What are common trace impurities and how can I remove them? Acetaldehyde: Can be removed by fractional distillation due to its lower boiling point. Ethyl Acetate: This is particularly challenging to remove by simple distillation because its boiling point is very close to that of VAM.
乙烯–醋酸乙烯酯–乙烯醇三元共聚物的制备及其在原油中的降
Ethylene-vinyl acetate-vinyl alcohol copolymer (HEVA) was synthesized by using ethylene-vinyl acetate copolymer (EVA) as starting materials, and KOH/isopropyl ketone solution as hydrolysis catalyst.
(PDF) Vinyl Acetate Monomer Process
1. Integration of vinyl acetate and ethylene glycol manufacturing through the intermediate 1,2 - diacetoxyethane. 2. Hydrogenative carbonylation of methyl acetate to 1,1 - diacetoxyethane...
Distilling off low
Inthe production of plastics, it is necessary to remove low-boiling components (LBC) from liquid polymers. In order to determine the distillation rate and to establish a mathe-matical model for a rotatory film evaporator (RFE), a stand was designed for utilizing the RFE for removing LBC at theVNIISS.
Purification Process Design of Vinyl Acetate Based on Aspen Plus
In the crude separation tower, acetic acid and vinyl acetate products were separated from the top of the crude separation tower. Ethylene acetate was extracted from the top of the crude separation tower and sent to the vinyl acetate refining tower for further refining and purification.
10 Vinyl Acetate Monomer Process
Reaction Kinetics The manufacturing of vinyl acetate by the oxyacetylation of ethylene is described by the following stoichiometric reaction: C 2 H 4 CH
Ethyl Acetate Removal During Vam Production Fang; Linn ; et al
Crude vinyl acetate streams are purified with an azeotropic distillation tower using a side draw to remove ethyl acetate and water, and a bottom stream to remove acetic acid from the crude vinyl acetate.
Vinyl acetate production process
The gas phase contains at least carbon dioxide, which is removed via gas stream. The crude vinyl acetate stream is removed via a liquid stream. The crude vinyl acetate is then further separated to isolate a stream containing at the majority of the ethylene glycol diacetate.
In the chemical industry, vinyl acetate is a critical organic chemical raw material, and its production process is complex and requires precision. The removal of low-boiling components is a key step in the production flow, directly affecting the quality and yield of the final product. This paper aims to explore how to optimize the de-volatization process of crude vinyl acetate through experimentation and practice, thereby improving production efficiency and product quality.
I. Research Background and Significance
The production of vinyl acetate typically involves synthesizing crude vinyl acetate, followed by purification methods such as distillation. During this process, the removal of low-boiling components is an unavoidable step, which involves separating low-boiling fractions from high-boiling ones. These low-boiling components often contain undesirable impurities or byproducts from side reactions. If retained in the product, they can compromise the quality and performance of the final material. optimizing the process selection for low-boiling component removal and refining operational parameters are crucial for enhancing production efficiency and product quality.
II. Experimental Design and Methods
To investigate optimal conditions for low-boiling component removal, a series of experiments were conducted. Different distillation apparatuses were tested, including conventional tray towers, packed columns, and advanced multiphase contactor distillation units. By varying feed methods, temperature control, pressure regulation, and reflux ratios, the effects of these parameters on de-volatization performance were systematically compared.
III. Experimental Results and Analysis
The results demonstrated that multiphase contactor distillation units significantly reduced energy consumption and minimized losses of low-boiling components. Compared to conventional tray towers, these units achieved higher separation efficiency under identical conditions while reducing product quality fluctuations caused by thermal instability. Additionally, adjusting the reflux ratio further optimized separation outcomes, effectively minimizing residual low-boiling components and ensuring product purity.
IV. Practical Application and Prospects
Based on experimental findings, operational parameters for low-boiling component removal in industrial production were optimized. By increasing feed rates and lowering operating temperatures, the content of low-boiling impurities in the product was successfully reduced to satisfactory levels. This optimization not only improved production efficiency but also lowered costs, delivering substantial economic benefits to the facility.
Looking ahead, plans include further refining de-volatization technologies, such as developing more efficient separation equipment, optimizing workflows, and integrating automated control systems. Concurrently, ongoing attention to environmental regulations will ensure compliance with evolving standards, advancing sustainable development.
research and practical efforts to improve the de-volatization process for crude vinyl acetate have enhanced both production efficiency and product quality, contributing to sustainable practices in the chemical industry. With continuous technological advancements, de-volatization techniques are expected to see broader applications and play a more significant role in chemical manufacturing.
