Device for removing acetic acid in nonylphenol ethyl ester through high-vacuum aeration

Abstract

The utility model relates to the technical field of chemical production, in particular to a device for removing acetic acid in nonylphenol ethyl ester through high-vacuum aeration. In order to solve the problems that the process of a common acetic acid removal mode is relatively complicated, the acetic acid distillation efficiency is low under the condition, ester is emulsified under an acidic condition after water is added, and the water is not thoroughly removed, so that the time for removing acetic acid by distilled water washing is relatively long, the following technical scheme is provided: the device comprises an enamel esterification reaction kettle, the enamel esterification reaction kettle is provided with a stirring mechanism for conveniently stirring a medium in the enamel esterification reaction kettle, and the bottom ends of supporting legs of the enamel esterification reaction kettle are connected with a supporting plate for stabilizing the position of the enamel esterification reaction kettle. According to the utility model, the deacidification process is simplified, and the deacidification efficiency is improved under the action of aeration and stirring, so that the time for removing acetic acid and purifying ethyl ester is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, in particular to a device for removing acetic acid in nonylphenol ethyl ester by high vacuum aeration. Background Art

[0002] Nonylphenol ethyl ester is a type of nonionic surfactant synthesized by nonylphenol and ethoxylation. They have strong emulsifying, wetting and dispersing properties, so they are widely used in many industrial and household applications. In the production process of nonylphenol ethyl ester, acetic acid by-product is produced. The presence of this product will produce a reverse reaction, reducing nonylphenol ethyl ester to nonylphenol, reducing the conversion rate of nonylphenol and the purity of ethyl ester. Nowadays, acetic acid is usually removed by vacuum distillation, adding water to dissolve the acetic acid in the ester, and then dehydrating the washed ester under reduced pressure.

[0003] However, the common method of removing acetic acid is complicated, and the efficiency of distilling acetic acid under this condition is low. After adding water, the ester is emulsified under acidic conditions, and the water is not completely removed, resulting in a long time for removing acetic acid by distilling water. In view of this, we propose a device for removing acetic acid from nonylphenol ethyl ester by high vacuum aeration. Utility Model Content

[0004] The utility model aims to solve the problems existing in the background technology and proposes a device for removing acetic acid in nonylphenol ethyl ester by high vacuum aeration.

[0005] The technical solution of the utility model is as follows: a device for removing acetic acid from nonylphenol ethyl ester by high vacuum aeration, comprising an enamel esterification reaction kettle, the enamel esterification reaction kettle is provided with a stirring mechanism for stirring the medium inside the enamel esterification reaction kettle, the bottom end of the supporting leg of the enamel esterification reaction kettle is connected with a supporting plate for stabilizing the position of the enamel esterification reaction kettle, a nitrogen generator for injecting nitrogen into the enamel esterification reaction kettle to accelerate the separation of acetic acid is installed on the top wall of the supporting plate, the outlet end of the enamel esterification reaction kettle is connected with a polyfluoro pipe for guiding the acetic acid gas, the outlet end of the polyfluoro pipe is connected with a graphite condenser for cooling the acetic acid gas, the outlet end of the graphite condenser is connected with a water ring vacuum pump, and the outlet end of the water ring vacuum pump is connected with a receiving tank for collecting the cooled acetic acid.

[0006] Preferably, a first row of pipes is installed at the bottom of the enamel esterification reaction kettle, and the inlet end of the first row of pipes is connected to the outlet end of the nitrogen generator.

[0007] Preferably, a base is installed on the top wall of the support plate, and the graphite condenser is installed on the top wall of the base.

[0008] Preferably, part of the top structure of the base is in a protruding state, and the water ring vacuum pump is installed at the protruding structure on the top of the base.

[0009] Preferably, a steam conduit for injecting steam into the enamel esterification reaction kettle is installed on one side wall of the enamel esterification reaction kettle, and a second row of pipes for discharging nonylphenol ethyl ester is also installed on one side wall of the enamel esterification reaction kettle.

[0010] Compared with the prior art, the utility model has the following beneficial technical effects:

[0011] The utility model heats nonylphenol ethyl ester by injecting steam into the enameled esterification reaction kettle, and at the same time, under the action of a nitrogen generator, introduces nitrogen with purity reaching the standard into the enameled esterification reaction kettle, so that the nitrogen and the heated nonylphenol ethyl ester produce an aeration reaction, and the mixing of a stirring mechanism is conducive to accelerating the separation speed, thereby reducing the time for removing acetic acid and achieving the purpose of saving time cost, and then the water ring vacuum pump is used to reduce the pressure in the graphite condenser and the tetrafluoroethylene pipeline, so that the acetic acid is introduced into the graphite condenser through the tetrafluoroethylene pipeline for condensation, and the converted liquid acetic acid after condensation is guided to a receiving tank for collection, so that the purification of ethyl ester is completed in a flow-type process, and the complexity of the treatment process is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the front view structure of a device for removing acetic acid from nonylphenol ethyl ester by high vacuum aeration;

[0013] Figure 2 yes Figure 1 Schematic diagram of the back structure.

[0014] Figure numerals: 1. support plate; 2. enamel esterification reactor; 3. stirring mechanism; 4. nitrogen generator; 5. first row of pipes; 6. polytetrafluoroethylene pipe; 7. graphite condenser; 8. water ring vacuum pump; 9. receiving tank; 10. base; 11. steam duct; 12. second row of pipes. DETAILED DESCRIPTION

[0015] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0016] Example

[0017] like Figure 1-2As shown, the utility model proposes a device for removing acetic acid from nonylphenol ethyl ester by high vacuum aeration, comprising an enamel esterification reactor 2, a support plate 1 located at the support legs of the enamel esterification reactor 2, the bottom ends of the support legs of the enamel esterification reactor 2 are fixedly connected to the top wall of the support plate 1, and the arrangement of the support plate 1 facilitates the stable support of the enamel esterification reactor 2; a stirring mechanism 3 is divided into a driving part and a stirring part, the driving part of the stirring mechanism 3 is installed at the top wall of the enamel esterification reactor 2, and the stirring part of the stirring mechanism 3 is located in the enamel esterification reactor 2, so as to facilitate the stirring of the medium in the enamel esterification reactor 2; a nitrogen generator 4 is fixedly installed on the top wall of the support plate 1, and the nitrogen generator 4 is supported by the support plate 1, the inlet end of the first row of pipes 5 is connected to the outlet end of the nitrogen generator 4, and when the purity of the nitrogen generated by the nitrogen generator 4 reaches the utilization standard, the nitrogen output by the nitrogen generator 4 can be The outlet end of the first row of pipes 5 is connected to the inside of the enamel esterification reactor 2, which is convenient for introducing the nitrogen generated by the nitrogen generator 4 into the enamel esterification reactor 2; the steam conduit 11 is installed on a side wall of the support plate 1, and the steam conduit 11 is used to guide the steam into the enamel esterification reactor 2, heat the medium in the enamel esterification reactor 2, and inject nitrogen in the enamel esterification reactor 2 to make the medium and nitrogen produce an aeration reaction, thereby accelerating the separation rate of acetic acid. At the same time, under the action of stirring, it is beneficial to increase the contact area between nitrogen and the medium, increase the deacidification rate, and reduce the deacidification time of nonylphenol ethyl ester; the second row of pipes 12 is also installed on a side wall of the enamel esterification reactor 2, and the inlet end of the second row of pipes 12 is connected to the inside of the enamel esterification reactor 2, which is used to discharge the medium after deacidification from the enamel esterification reactor 2, so as to facilitate the subsequent use of the enamel esterification reactor 2.

[0018] Further, the inlet end of the polyfluoro pipe 6 is connected to the outlet end of the enamel esterification reaction kettle 2, so as to discharge the acetic acid gas in the enamel esterification reaction kettle 2 from the enamel esterification reaction kettle 2; the graphite condenser 7 is located on the other side of the enamel esterification reaction kettle 2, and the inlet end of the graphite condenser 7 is connected to the outlet end of the polyfluoro pipe 6, so that the acetic acid gas can enter the graphite condenser 7 for cooling, which is convenient for subsequent collection, processing and utilization; the water ring vacuum pump 8 is located on one side of the graphite condenser 7, and the inlet end of the water ring vacuum pump 8 is connected to the outlet end of the graphite condenser 7, which is convenient for reducing the pressure in the graphite condenser 7 and the polyfluoro pipe 6, and convenient for guiding the acetic acid gas in the enamel esterification reaction kettle 2 to the graphite condenser 7 for cooling treatment; the receiving tank 9 is fixedly installed on the top wall of the support plate 1, and the outlet end of the water ring vacuum pump 8 is connected to the inside of the receiving tank 9, so as to facilitate the introduction of the cooled acetic acid into the receiving tank 9 for collection, and to facilitate its recycling, so as to achieve the purpose of deacidification and purification of nonylphenol ethyl ester, and reduce the processing difficulty under the assembly line processing procedure.

[0019] Furthermore, the base 10 is fixedly mounted on the top wall of the support plate 1, and the graphite condenser 7 is fixedly mounted on the top wall of the base 10. The setting of the base 10 supports the graphite condenser 7, which is beneficial to keep the inlet end of the graphite condenser 7 consistent with the outlet end of the polytetrafluoroethylene pipe 6, so as to avoid affecting the cooling treatment of the acetic acid gas; the top part of the structure of the base 10 is in a convex state, and the water ring vacuum pump 8 is fixedly mounted on the convex part of the top of the base 10. Through the setting of the convexity, the inlet end of the water ring vacuum pump 8 is consistent with the outlet end of the graphite condenser 7, which is convenient for reducing the pressure in the graphite condenser 7 and is beneficial to introduce the cooled acetic acid into the receiving tank 9 for collection.

[0020] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A device for removing acetic acid from nonylphenol ethyl ester by high vacuum aeration, comprising an enamel esterification reaction kettle (2), characterized in that: The enamel esterification reaction kettle (2) is provided with a stirring mechanism (3) for stirring the medium inside the enamel esterification reaction kettle (2); the bottom end of the supporting leg of the enamel esterification reaction kettle (2) is connected to a supporting plate (1) for stabilizing the position of the enamel esterification reaction kettle (2); the top wall of the supporting plate (1) is provided with a nitrogen generator (4) for injecting nitrogen into the enamel esterification reaction kettle (2) to accelerate the separation of acetic acid; the outlet end of the enamel esterification reaction kettle (2) is connected to a polyfluoro pipe (6) for guiding the acetic acid gas; the outlet end of the polyfluoro pipe (6) is connected to a graphite condenser (7) for cooling the acetic acid gas; the outlet end of the graphite condenser (7) is connected to a water ring vacuum pump (8); the outlet end of the water ring vacuum pump (8) is connected to a receiving tank (9) for collecting the cooled acetic acid.

2. The device for removing acetic acid from nonylphenol ethyl ester by high vacuum aeration according to claim 1, characterized in that: A first row of pipes (5) is installed at the bottom of the enamel esterification reaction kettle (2), and the inlet end of the first row of pipes (5) is connected to the outlet end of the nitrogen generator (4).

3. The device for removing acetic acid from nonylphenol ethyl ester by high vacuum aeration according to claim 1, characterized in that: A base (10) is installed on the top wall of the support plate (1), and the graphite condenser (7) is installed on the top wall of the base (10).

4. The device for removing acetic acid from nonylphenol ethyl ester by high vacuum aeration according to claim 3, characterized in that: Part of the top structure of the base (10) is in a protruding state, and the water ring vacuum pump (8) is installed at the protruding structure on the top of the base (10).

5. The device for removing acetic acid from nonylphenol ethyl ester by high vacuum aeration according to claim 1, characterized in that: A steam conduit (11) is installed on one side wall of the enamel esterification reaction kettle (2) for facilitating the injection of steam into the enamel esterification reaction kettle (2), and a second row of pipes (12) is also installed on one side wall of the enamel esterification reaction kettle (2) for facilitating the discharge of nonylphenol ethyl ester.

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