Novel method for preparing vinyl acetate from bioethanol

A vinyl acetate and bio-ethanol technology, applied in the new field of bio-ethanol preparation of vinyl acetate, can solve problems such as declining economic competitiveness and soaring oil prices, improve market competitiveness, solve carbon deposition, reduce process water consumption and process The effect of wastewater discharge

Active Publication Date: 2010-08-11
TIANJIN UNIV
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  • Application Information

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Problems solved by technology

However, due to the dependence on oil resources in the production of vinyl acetate by the ethylene method, with the serious imb...

Method used

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  • Novel method for preparing vinyl acetate from bioethanol
  • Novel method for preparing vinyl acetate from bioethanol
  • Novel method for preparing vinyl acetate from bioethanol

Examples

Experimental program
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Embodiment

[0040] Using cassava ethanol fermented mature mash as raw material, using figure 1 , figure 2 , image 3 A new method for preparing vinyl acetate from bioethanol shown in the figure is operated to produce vinyl acetate products.

[0041] 1. Bio-ethylene production unit

[0042] The ethanol fermentation mature mash from the alcohol fermentation unit is first preheated as the cooling medium of the overhead condenser 4 of the ethanol distillation tower, and then further heated by the tower bottom liquid cooler 1, and finally enters the ethanol distillation tower 2 as a feed material for refining. Distillation operation, the ethanol volume concentration of the ethanol fermentation mature mash is 12%, the operating pressure (absolute pressure) of the ethanol distillation tower 2 is 0.1MPa, and the ethanol fermentation mature mash removes water, organic acids and heavy component impurities in the ethanol distillation tower. The top steam is passed through the tower top condenser...

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Abstract

The invention relates to a novel method for preparing vinyl acetate from bioethanol. Ethanol is fermented into finished yeast mash used as the raw material, and three cells, i.e. bio-ethylene preparation, vinyl acetate synthetic reaction, vinyl acetate refinement, are used for producing the vinyl acetate product satisfying the requirements. The method is realized in a way that: the mass concentration of the ethanol water solution from an ethanol distillation tower is 40-60%, and the raw material ethanol used for preparing ethylene through dehydration does not need to be diluted by adding water, and is directly vaporized by heating and conveyed into an ethylene reactor; after cooling to condense the ethylene reaction gas from an ethylene reactor, gas is separated from liquid in a gas/liquid separating tank, and the gas mainly containing the ethylene is conveyed to a vinyl acetate reaction unit to synthesize the vinyl acetate after being compressed by using an ethylene compressor, thereby realizing zero consumption of process water in the ethylene production process. Thus, the invention simplifies and shortens the production process and reduces the energy consumption and material consumption in the vinyl acetate production process. By using the method, renewable biomass materials in the vinyl acetate production process can partially replace unrenewable fossil materials.

Description

technical field [0001] The invention relates to a new method for preparing vinyl acetate from bioethanol. According to the characteristics of the preparation of bioethanol raw materials and bioethylene intermediate products, the method optimizes and integrates technologies such as the preparation of bioethanol raw materials, ethylene intermediate products, and vinyl acetate products, thereby shortening and simplifying the production process. The production process of vinyl acetate prepared from bioethanol is improved, the energy consumption and material consumption of vinyl acetate production are reduced, and the market competitiveness of vinyl acetate products produced from bioethanol is improved. Background technique [0002] Vinyl acetate (VAc) is an important organic chemical raw material. Polyvinyl alcohol (PVA), vinyl acetate-ethylene copolymer (EVA), polyvinyl acetate (PVAC), Derivatives such as vinyl acetate-vinyl chloride copolymer (EVC). These derivatives have a w...

Claims

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Application Information

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IPC IPC(8): C07C69/15C07C67/04C07C67/54
Inventor 张敏华董秀芹刘成吕惠生刘宗章李永辉陶敏莉欧阳胜利钱胜华余英哲
Owner TIANJIN UNIV
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