Esterizing tower reaction separating flow new process for producing ethyl acetate

Abstract

The present invention relates to ethyl acetate producing process in esterifying tower with high rectification effect. The technological scheme is that the acetic acid and ethanol solution after sulfuric acid catalyzed esterification is gasified under steam heating condition to form the azeotrope system of ester, water, alcohol and acid; and the azeotrope system is rectified and separated in an esterifying tower to obtain the coarse ester product in the top. The present invention features that inside the esterifying tower, there is regular ripple stainless steel sheet packing. The ripple stainless steel sheet packing has great specific surface area and high separation effect, consists of different sizes, and is optimized based on driving force mathematic model established according to material property and esterification and separation purity. The present invention has low esterifying tower resistance, and high esterification product purity with coarse ester content up to 95 %.

Description

1. Technical field: [0001] The invention relates to a process for producing ethyl acetate, in particular to a new process for producing ethyl acetate in an esterification tower reaction and separation process. The product rectification effect is improved by applying metal fillers in the esterification tower. 2. Background technology: [0002] Ethyl acetate is synthesized by reacting acetic acid and ethanol under the action of sulfuric acid catalyst. Due to the addition of sulfuric acid to the system, higher requirements are placed on the formation and material of equipment and fillers. The traditional esterification tower basically uses porcelain ring packing, so it plays a certain role in acid corrosion resistance. However, the specific surface area of ​​the ceramic ring is small, the number of theoretical plates per meter is small, and the resistance per unit height is large, which increases the tower height. Due to the increase of the packing height, the resistance diff...

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Problems solved by technology

There is basically no breakthrough in the material of the packing material, and the regular ceramic packing used in the later stage is rigid, and each layer is assembled from more than a dozen pieces. The gaps in the assembly cannot meet the specified requirements, and the gaps cause bias flow, which seriously affects the rectification of the tower. effect, and if the installation is not good, it is easy to cause a large number of broken pieces, and the debris will block the pipeline, which will increase the resistance of the tower and affect the operation