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Method and device for recycling acetylene during production process of vinyl acetate

A vinyl acetate and recovery method technology, applied in chemical instruments and methods, purification/separation of hydrocarbons, hydrocarbons, etc., can solve problems such as loss of acetylene raw materials, achieve the effects of improving utilization rate, easy implementation, and reducing unit consumption

Active Publication Date: 2015-11-18
ANHUI WANWEI UPDATED HIGH TECH MATERIAL CO LTD
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AI Technical Summary

Problems solved by technology

In order to prevent the accumulation of inert gases such as nitrogen and reduce the concentration of acetylene to affect the smooth progress of the reaction, a part of the gas must be released from the top of the gas separation tower, which will cause the loss of acetylene raw materials

Method used

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  • Method and device for recycling acetylene during production process of vinyl acetate

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Embodiment Construction

[0039] like figure 1 As shown, the present embodiment first sets up the following recovery device: comprising exhaust gas collection tank 1, first pressurization equipment 2, absorption tower 3, first pump 4, degassing tower 5, recovery gas collection tank 6, second pressurization Equipment 7, water washing tower 8, absorption liquid condenser 9, brine condenser 10, second pump 11, reboiler 12 and heat exchanger 13;

[0040] The absorption tower is sequentially provided with an outlet 3c at the bottom of the absorption tower, an inlet 3a at the bottom of the absorption tower, an inlet 3b at the top of the absorption tower and an outlet 3d at the top of the absorption tower;

[0041] The degassing tower 5 is arranged in three sections, from bottom to top, it is the absorption liquid storage section 53, the degassing tower desorption section 51 and the degassing tower absorption section 52; the bottom of the absorption liquid storage section 53 is the bottom outlet 5e of the deg...

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Abstract

The invention discloses a method and device for recycling acetylene during the production process of vinyl acetate. The method is characterized in that an absorbing tower, a degassing tower, and a water washing tower are arranged, the reaction gas discharged from the top of a gas separation tower in the vinyl acetate synthesis step is subjected to an acetylene absorbing treatment, an acetylene releasing treatment, and an acetylene water washing treatment in sequence so as to remove the inert gas and acetaldehyde in the reaction gas, and acetylene with a concentration of 98% or more is obtained. The acetylene in the production process of vinyl acetate is comprehensively recycled and utilized, the utilization rate of raw material is improved, the consumption of raw materials and energy is reduced, and the cost is greatly reduced.

Description

technical field [0001] The invention relates to a method for recovering acetylene in the production process of vinyl acetate and a recovery device thereof. technical background [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 1965, Beijing Organic Chemical Factory introduced acetylene method fluidized bed technology from Japan, and then built several similar devices in China. In recent years, with the development of polyvinyl alcohol, China's vinyl acetate market has continued to expand. According to statistics, the current total production capacity of vinyl acetate in China is 2.2 million ...

Claims

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Application Information

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IPC IPC(8): C07C11/24C07C7/00
Inventor 朱宝华王平林施红生黄荣海秦龙虎查从元
Owner ANHUI WANWEI UPDATED HIGH TECH MATERIAL CO LTD
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