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Low-acidity acetate material esterification reaction system

A technology of esterification reaction and acetic acid ester, which is applied in the chemical industry, can solve the problem of high acidity content of crude ester, and achieve the effect of preventing the material from being acidified

Inactive Publication Date: 2020-05-19
史红桂
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the acidity content of crude ester is too high in the prior art, the object of the present invention is to provide a kind of acetate material esterification reaction system with the function of separating acetic acid

Method used

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Embodiment Construction

[0012] Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail:

[0013] As shown in the figure, a low-acidity acetate material esterification reaction system includes an esterification tower 1, the bottom of the esterification tower 1 is provided with a material inlet 2 and a water inlet 3, and the top of the esterification tower 1 is provided with a crude product outlet 4, and the crude product Outlet 4 is connected to rectification tower 5; packing 6 is installed in the middle of esterification tower 1, and the packing section of esterification tower is provided with middle outlet 7 and gas phase inlet 8 of esterification tower, and outlet 7 is located at 50%-70% of the packing height %, the gas phase inlet 8 of the esterification tower is located at 40%-60% of the packing height, and the discharge port 7 is located above the gas phase inlet 8 of the esterification tower; a phase separator 9 is arranged ...

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Abstract

The invention relates to a low-acidity acetate material esterification reaction system, which comprises an esterification tower, wherein a material inlet and a water inlet are formed in the bottom ofthe esterification tower, a crude product outlet is formed in the top of the esterification tower, and is connected with a rectifying tower, a filler is mounted in the middle of the esterification tower, the filler section of the esterification tower is provided with a middle discharge port and an esterification tower gas phase inlet, the discharge port is located at 50-70% of the filler height, the esterification tower gas phase inlet is located at 40-60% of the filler height, the discharge port is located above the esterification tower gas phase inlet, a phase splitter is arranged inside oroutside the esterification tower, the inlet of the phase splitter is connected with the middle discharge port, the gas phase outlet of the phase splitter is connected with the gas phase inlet of the esterification tower, the liquid phase outlet of the phase splitter is divided into two branches respectively connected with the water inlets of a recovery tower and the esterification tower, and the water inlet of the esterification tower is connected with a water supplementing branch.

Description

technical field [0001] The patent of the present invention relates to the field of chemical industry, in particular to a low-acidity acetate material esterification reaction system. Background technique [0002] Acetate is an important class of organic chemical products, which can be widely used in industries such as paint making, spices, pharmaceuticals, and paint solvents. At present, the production of acetic acid products mainly adopts the traditional production process, that is, under heating, acetic acid and alcohols undergo esterification reaction under the catalysis of concentrated sulfuric acid to generate ester and water. The reaction materials are discharged through the esterification tower and the rectification tower, and the purity can reach more than 99.5%. There are strict requirements on the acid content of finished acetate products. Generally speaking, the acidity of finished acetate products must be controlled at 0.001-0.005%. [0003] During production, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/48C07C69/14
CPCC07C67/48C07C69/14
Inventor 史红桂
Owner 史红桂
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