High purity ethyl acetate purifying and refining tower and its application
An ethyl acetate and application method technology, which is applied in the field of high-purity ethyl acetate purification and purification towers and kettle-type reboilers, can solve the problems of reducing the rate of unqualified products, easily exceeding the product acid content, poor refining effect, etc. Increased economic benefits, easy temperature control, and stable operation
Active Publication Date: 2007-07-11
SHANGHAI HUAYI ENERGY CHEM
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Problems solved by technology
[0005] The purpose of the present invention is to solve the defects of poor refining effect, large resistance, and product acid content that is easy to exceed the standard in the prior art, stabilize the operation to reduce the rate of unqualified products, and obtain high-purity ethyl acetate products
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[0015] The feed components and proportion (weight) are: 98.9% ethyl acetate, 1.0% acidity (calculated as acetic acid), 0.08% alcohol (calculated as ethanol), and 0.02% moisture. According to the above requirements, choose 304 and 316L stainless steel sheet packing with appropriate thickness for punching and corrugation. In the embodiment, three metal trays made of 316L stainless steel and a kettle-type reboiler with an overflow baffle are used.
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Abstract
The present invention is high purity ethyl acetate purifying and refining tower and its application. Ethyl acetate product through eliminating water, alcohol and light component and containing small amount of acid is purified inside the high purity ethyl acetate purifying and refining tower through evaporation, rectification and separation so as to obtain high purity ethyl acetate product with micro acid content in the tower top. The refining tower is provided with metal column plate and metal stuffing and features overflow baffling board, tank re-boiler, metal stuffing of regular stainless steel sheets, and the elimination of small amount of heavy component from the bottom. The sheet stuffing has great specific surface area and high separation effect, and is optimized based on push force mathematic mold, so that the refining tower has less resistance, high product purity over 99.7 %, product acidity lower than 27 ppm, and stable operation.
Description
1. Technical field: [0001] The present invention relates to a high-purity ethyl acetate production process, and in particular discloses a high-purity ethyl acetate purification and refining tower and its application method, through the application of metal trays and metal fillers in the refining tower and the still-type tank with overflow baffles Reboiler, improve product distillation effect, stable operation and convenient control. 2. Background technology: [0002] The production of ethyl acetate generally adopts a rectification tower including an esterification reaction, a concentration tower (dehydration, alcohol and light components), a refining tower (deacidification and heavy components), and a waste water recovery tower (waste water treatment, light component recovery). Four-tower process. After being dehydrated in the concentration tower, the crude product after passing the alcohol and light components often needs to go through the purification tower to remove trac...
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IPC IPC(8): C07C67/54C07C69/14
Inventor 曾义红齐峻叶定静吴云龙唐素丽沈树荣
Owner SHANGHAI HUAYI ENERGY CHEM