A device for extracting n-butyl acetate crude ester

Abstract

The utility model discloses a crude ester extraction deacidification device of n - butyl acetate, including the extraction column, the crude ester import is equipped with the water inlet on the upper portion of extraction column, and the lower portion of extraction column is equipped with the discharge gate, and the discharge gate is connected in the discharge pipe, and the discharge gate is still connected in the drying box, and is equipped with the second discharge pipe on the lateral wall of drying box, and the second discharge pipe is connected in the heating tower, and the upper end of heating tower is connected in the collecting jar through the condensation structure. The utility model discloses through the water extraction of the redundant acid in n - butyl acetate crude ester, and then through drying, remove the redundant water, and finally heat distillation purification, thereby guarantee the purity of butyl acetate production.

Description

Technical Field

[0001] This utility model relates to the field of n-butyl acetate production technology, specifically to a crude n-butyl acetate extraction and deacidification device. Background Technology

[0002] In the production of butyl acetate, acetic acid and butanol are generally esterified under the action of a catalyst to form n-butyl acetate. After esterification, the crude n-butyl acetate obtained requires extraction and deacidification steps to obtain n-butyl acetate with higher purity. A Chinese invention patent application with application number 201610092628.8 discloses an extraction and deacidification process for crude n-butyl acetate, which achieves extraction and deacidification of crude n-butyl acetate by setting up an extraction tower and a light-removal tower. However, in the above structure, it is difficult to effectively remove excess acetic acid from the crude ester, and the dehydration of the crude ester is not efficient, indicating room for improvement. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of the aforementioned background technology by providing a crude butyl acetate extraction and deacidification device for efficiently deacidifying and improving the purity of butyl acetate.

[0004] To achieve the above objectives, this utility model provides a crude butyl acetate extraction and deacidification device, which adopts the following technical solution: A crude butyl acetate extraction and deacidification device includes an extraction tower, with a crude ester inlet and a water inlet at the top and a discharge outlet at the bottom. The discharge outlet is connected to a discharge pipe and also connected to a drying chamber. A second discharge pipe is provided on the side wall of the drying chamber and is connected to a heating tower. The upper end of the heating tower is connected to a collection tank through a condensation structure.

[0005] A further improvement of the present invention, a crude butyl acetate extraction and deacidification device, is that a reflux pipe is connected to the discharge pipe, and the reflux pipe is connected to the extraction tower.

[0006] A further improvement of the present invention, a crude butyl acetate extraction and deacidification device, is that the drying box includes a box body, a box cover is provided on the upper end face of the box body, and a feed inlet is provided on the box cover.

[0007] A further improvement of the present invention, a crude ester extraction and deacidification device for n-butyl acetate, is that the second discharge pipe is provided with two sets, and a filter screen is provided on the second discharge pipe, and a filter cloth is provided on the filter screen.

[0008] A further improvement of the present invention for a crude butyl acetate extraction and deacidification device is that the second discharge pipe includes two sets of L-shaped fixed pipes, a bend is provided between the two sets of fixed pipes, a connecting pipe is provided between the end of the bend and the end of the fixed pipe, and the filter screen is placed inside the bend.

[0009] Compared with the prior art, the beneficial effects of this utility model are: This invention extracts excess acid from crude butyl acetate by adding water, then removes excess water by drying, and finally purifies by heating and distillation, thereby ensuring the purity of butyl acetate production. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of another embodiment of the second discharge pipe of this utility model; In the diagram: 1 Extraction tower, 2 Discharge pipe, 3 Drying box, 4 Inlet, 5 Second discharge pipe, 6 Heating tower, 7 Condensation structure, 8 Collection tank, 9 Reflux pipe, 10 Fixed pipe, 11 Bend, 12 Connecting pipe. Detailed Implementation

[0011] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0012] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0013] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0015] like Figure 1As shown, a crude ester extraction and deacidification device for n-butyl acetate includes an extraction tower 1. The upper part of the extraction tower is provided with a crude ester inlet and a water inlet, and the lower part of the extraction tower is provided with a discharge outlet. The discharge outlet is connected to a discharge pipe 2 and is also connected to a drying box 3. A second discharge pipe 5 is provided on the side wall of the drying box. The second discharge pipe is connected to a heating tower 6. The upper end of the heating tower is connected to a collection tank 8 through a condensation structure 7.

[0016] A reflux pipe 9 can be connected to the discharge pipe, and the reflux pipe is connected to the extraction tower. The reflux pipe can be connected to the extraction tower via a pump. The reflux pipe allows for more thorough mixing of the crude ester and water.

[0017] The drying oven includes a chamber body with a lid on the upper surface. The lid has a feed inlet 4. The feed inlet is used for the introduction of desiccant, thereby achieving the dehydration of crude n-butyl acetate after deacidification. The removable lid design facilitates cleaning of impurities inside the oven.

[0018] Two sets of second discharge pipes are provided, each equipped with a filter screen covered with filter cloth. A second filter screen can be installed on the housing, located at the connection between the second discharge pipe and the housing. This second filter screen also contains filter cloth to prevent desiccant and impurities from entering the heating tower. The second discharge pipe is a straight pipe. With two sets of second discharge pipes, one set is used during operation, while the other set is disassembled for maintenance. A valve is installed at the front end of the second discharge pipe to control the flow of crude ester.

[0019] Furthermore, in another embodiment of the second discharge pipe, the second discharge pipe includes two sets of L-shaped fixed pipes 10, with a bend 11 between the two sets of fixed pipes. A connecting pipe 12 is provided between the end of the bend and the end of the fixed pipe, and the filter screen is placed inside the bend. The connecting pipe is a cylindrical pipe with threads on the inner sides of both ends. The fixed pipe and the bend are provided with matching threads, and the two are threadedly connected.

[0020] The working principle of this invention is as follows: crude n-butyl acetate is added to the extraction tower, water is added, the layers are separated, the oil phase enters the drying oven, a desiccant is added for dehydration, and the dehydrated crude ester enters the heating tower for distillation and cooling to obtain purified n-butyl acetate.

[0021] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A crude butyl acetate extraction and deacidification apparatus, characterized in that, The system includes an extraction tower, with a crude ester inlet and a water inlet at the top and a discharge outlet at the bottom. The discharge outlet is connected to a discharge pipe and also to a drying chamber. A second discharge pipe is provided on the side wall of the drying chamber and is connected to a heating tower. The upper end of the heating tower is connected to a collection tank via a condensation structure.

2. The apparatus for crude butyl acetate extraction and deacidification according to claim 1, characterized in that, The discharge pipe is connected to a reflux pipe, which is connected to the extraction tower.

3. The crude butyl acetate extraction and deacidification apparatus according to claim 2, characterized in that, The drying oven includes a box body, a box cover on the upper surface of the box body, and a feed inlet on the box cover.

4. The crude butyl acetate extraction and deacidification apparatus according to claim 3, characterized in that, The second discharge pipe is provided with two sets, and a filter screen is provided on the second discharge pipe, and a filter cloth is provided on the filter screen.

5. The crude butyl acetate extraction and deacidification apparatus according to claim 4, characterized in that, The second discharge pipe includes two sets of L-shaped fixed pipes, with a bend between the two sets of fixed pipes. A connecting pipe is provided between the end of the bend and the end of the fixed pipe, and the filter screen is placed inside the bend.

Images