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Vinyl acetate production method

A technology of vinyl acetate and ethylene, which is applied in chemical instruments and methods, separation/purification of carboxylate, preparation of carboxylate, etc. It can solve the problems of large cooling water consumption, complicated operation, and consumption of ion-free water.

Active Publication Date: 2013-02-20
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This not only causes a large consumption of deionized water, but also requires a separate deionized water cooling system to provide deionized water at a suitable temperature; this results in complicated operation and large investment in equipment
[0006] Generally, in the ethylene vinyl acetate production process, the first cooler of the gas separation tower uses a multi-tube shell-and-tube heat exchanger, which cannot achieve full countercurrent operation and consumes a large amount of cooling water

Method used

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Embodiment Construction

[0054] The ethylene-based vinyl acetate production method of the present invention mainly includes an ethylene preparation section (optional), a vinyl acetate synthesis section and a vinyl acetate rectification section. In the following, the above paragraphs will be described with reference to the accompanying drawings.

[0055] 1. Ethylene preparation section

[0056] The ethylene production section includes ethylene synthesis system and ethylene refining system. The raw material ethanol is sent from the raw material tank area to the ethanol tank 101, and after being preheated by the ethanol preheater 102, it enters the ethanol evaporation tank 103, and the ethanol after being overheated by the heater 104 enters the heating furnace 105, and is sent to the reactor 106 after being heated by the heating furnace . After multi-stage cooling, the reaction product is sent to the ethylene condenser 109 for further condensation. The ethylene condenser adopts the method of air conde...

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Abstract

The present invention relates to a vinyl acetate production method. The present invention provides a method for producing vinyl acetate through ethylene vapor-phase oxidation, wherein the method comprises an optionally ethylene preparation process, a vinyl acetate synthesis process and a vinyl acetate refinement process, and at least one process of the ethylene preparation process, the vinyl acetate synthesis process and the vinyl acetate refinement process adopts at least one selected from a steam mechanical recompression technology, an air cooler, a plate heat exchanger and a double shell side shell and tube heat exchanger.

Description

technical field [0001] The invention relates to a method for producing vinyl acetate, in particular to a method for producing vinyl acetate with reduced energy consumption. Background technique [0002] Vinyl acetate (VAC), also known as vinyl acetate, is an important organic chemical raw material. By self-polymerization or copolymerization with other monomers, vinyl acetate can produce polyvinyl alcohol (PVA), vinyl acetate-ethylene copolymer (EVA), polyvinyl acetate (PVAC), vinyl acetate-vinyl chloride copolymer (EVC), etc. product. These products have a wide range of uses, and are generally used in adhesives, sizing agents for paper or fabrics, paints, inks, leather processing, emulsifiers, water-soluble films, soil conditioners, etc. [0003] Generally speaking, there are two production routes of vinyl acetate: ethylene method and acetylene method. Worldwide, ethylene production is currently dominant. The production process of vinyl acetate by ethylene method is to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/15C07C67/05C07C67/48
CPCC07C67/05C07C69/15
Inventor 张敏华董秀芹欧阳胜利李永辉刘成陶敏莉马静李桂明
Owner TIANJIN UNIV
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