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Device and method for decreasing moisture in vinyl acetate synthesis raw material acetylene gas

A technology of vinyl acetate and acetylene gas, applied in chemical instruments and methods, hydrocarbons, adsorption purification/separation, etc., can solve the problems of consuming acetylene and vinyl acetate, affecting catalyst life and product quality, and reducing side reactions , easy to implement, and reduce production costs

Pending Publication Date: 2019-03-01
INNER MONGOLIA MENGWEI TECH CO LTD +1
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AI Technical Summary

Problems solved by technology

In the production process of vinyl acetate produced by the calcium carbide acetylene method, after acetylene generation, sodium hypochlorite oxidative impurity removal, and alkali washing impurity removal, the acetylene gas still contains more than 2% of water vapor. If it is brought into the vinyl acetate synthesis reactor, it will increase The side reaction of synthesis produces acetaldehyde, acetaldehyde polymer and crotonaldehyde, etc., which not only consumes acetylene and vinyl acetate in vain, but also affects the life of the catalyst and the quality of the product

Method used

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  • Device and method for decreasing moisture in vinyl acetate synthesis raw material acetylene gas

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Embodiment Construction

[0030] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the scope of protection of the present invention is not limited to the following the described embodiment.

[0031] Such as figure 1 As shown, the present embodiment first sets the following devices: comprising a low-temperature water washing tower 1, heat exchange equipment 2, adsorption tank 3, gas separation tower 4 and water washing circulation pump 5;

[0032] The low-temperature water washing tower 1 has a two-stage structure, the lower section is the low-temperature water washing section 1-2, and the upper section is the gas-liquid separation section 1-1; The lower part of 1-2 is provided with an acetylene gas inlet 1b, and the upper part is provided with a fr...

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Abstract

The invention discloses a device and method for decreasing moisture in vinyl acetate synthesis raw material acetylene gas. The device is characterized by being provided with a water scrubbing tower, an adsorption tank and a gas separating tower, the moisture contained in acetylene gas after alkali washing and impurity removal is further removed through the three unit processes of low-temperature water washing, adsorption drying and reaction liquid washing, and the moisture content in the acetylene gas is reduced to 0.01% or below. By effectively removing the moisture in the vinyl acetate production process, side reactions are decreased, the utilization rate of raw materials is improved, the production cost is reduced, and product quality is improved.

Description

technical field [0001] The invention relates to a device and method for reducing moisture in acetylene gas, a raw material for vinyl acetate synthesis. Background technique [0002] Vinyl acetate is one of the most productive organic chemical raw materials in the world, widely used in the production of polyvinyl acetate (PVAc), polyvinyl alcohol, coatings, pastes, adhesives, vinylon, films, vinyl copolymer resins, acetal A series of chemical and chemical fiber products such as resin, its application involves all walks of life. [0003] The production of vinyl acetate in my country began in the 1960s. In recent years, with the development of polyvinyl alcohol, China's vinyl acetate market has continued to expand. There are two types of vinyl acetate production process routes: ethylene method and acetylene method. In my country, the calcium carbide acetylene method is the main method. In the production process of vinyl acetate produced by the calcium carbide acetylene metho...

Claims

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Application Information

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IPC IPC(8): C07C11/24C07C7/12C07C7/00
CPCC07C7/005C07C7/12C07C11/24
Inventor 张东华迟立波柳巨澜张明孙广兵韩小龙朱宝华乔建光郜鹏飞孙志强
Owner INNER MONGOLIA MENGWEI TECH CO LTD
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