Preparation device for synthesizing n-butyl acetate

Abstract

The utility model discloses a catalyst for synthesizing n-butyl acetate and a preparation device, belongs to the technical field of n-butyl acetate production, solves the problems of low product output, easy pipeline corrosion and low catalytic reaction efficiency in the prior art, and comprises a control base, a heating plate is arranged on the surface of the control base, and a reaction tank is arranged on the surface of the heating plate. Two sides of the top of the reaction tank are respectively connected with a first bin and a second bin, the side part is provided with an N2 ejector, and the reaction tank is filled with a solid catalyst. The jet device is added in the feeding stage, so that reaction raw materials can be fully vaporized, high-airspeed airflow can be fully and uniformly mixed with a catalyst, the raw materials are fully reacted, the reactant output is improved, the catalyst is arranged to be in a solid state, and the retention time of products on the surface of the catalyst is shortened by matching with vaporization of the reaction raw materials; side reactions such as dehydration and carbon deposition are reduced, the product quality is improved, and meanwhile the situation that liquid concentrated sulfuric acid serves as a catalyst and corrodes a pipeline is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to n-butyl acetate production technical field, specifically, especially relate to a preparation device of synthetic n-butyl acetate. BACKGROUND

[0002] N-butyl acetate, simply called butyl acetate, is a colorless transparent liquid with pleasant fruity aroma, which is difficult to dissolve in water, miscible with alcohol, ether, ketone and other organic solvents, flammable, less acute toxicity, but has strong irritation to eyes and nose, and can cause anesthesia at high concentration. N-butyl acetate is an excellent organic solvent, which has good solubility for ethyl cellulose, cellulose acetate butyrate, polystyrene, methyl methacrylate resin, chlorinated rubber and various natural gums. At present, in the production process of butyl acetate, the raw materials acetic acid and butanol, and the catalyst concentrated sulfuric acid are added into the reaction kettle together during esterification reaction, and the reaction and rectification are carried out by steam heating. However, due to the oxidation and dehydration of concentrated sulfuric acid, a series of side reactions occur, which brings difficulties to the refining of products and the recovery of raw materials, and the yield of products is low. In addition, concentrated sulfuric acid has strong corrosive property, which seriously corrodes the equipment, easily causes damage to the equipment and pipeline, and has certain safety hidden danger. The temperature reaches 105 DEG C during esterification reaction, the reaction temperature is too high, which causes load to the equipment, and the conversion rate of esterification is low, which reduces the service life of the equipment and pipeline. SUMMARY

[0003] The utility model discloses in order to solve the technical problem existing in the prior art, provide a product output, not easy to corrode the pipeline, the catalytic reaction efficiency high preparation device of synthetic n-butyl acetate.

[0004] In order to realize the above technical purpose, the technical scheme that the utility model discloses a preparation device of synthetic n-butyl acetate adopts:

[0005] A kind of synthetic n-butyl acetate catalyst, it is solid acid catalyst, main part is the rotation body with straight hole in middle axis, including cylinder and straight face body at both ends of cylinder, the straight face body cross section is quadrilateral, the straight face body rotates along catalyst axial direction.

[0006] Preferably, the mesh number of the synthetic n-butyl acetate catalyst is 20-40 mesh.

[0007] The utility model provides a preparation device of synthetic n-butyl acetate, including control base, the surface of control base is equipped with heating plate, the surface of heating plate is equipped with reaction tank, both sides of reaction tank top are connected with first bin and second bin respectively, the side of reaction tank is equipped with N2 jet flow ware inserted into reaction tank, the other end of N2 jet flow ware and reaction tank connection end is connected with N2 bottle through pipeline, the inside of reaction tank is filled with solid catalyst, one side of reaction tank lower part is equipped with pumping pipe, pumping pipe one end is connected with pumping pump, and the other end is connected with branch pipe, and branch pipe end is connected with screening tank, and screening tank is connected with receiving box through pipeline.

[0008] Preferably, the control base side is equipped with a control panel, and the control panel is electrically connected with the pumping pump through an internal controller.

[0009] Preferably, a peristaltic pump is arranged on the pipeline connecting the N2 jet flow ware with the N2 bottle.

[0010] Preferably, an electric valve is arranged on the connecting pipeline between the first bin and the reaction tank and the connecting pipeline between the second bin and the reaction tank.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] The utility model adds jet flow ware in the feeding stage, so that the reaction raw materials can be fully vaporized, the high-speed airflow can be fully mixed with the catalyst, the raw materials can be fully reacted, the reaction product output is improved; the catalyst is set as a solid, which is matched with the vaporized reaction raw materials, reduces the residence time of the product on the catalyst surface, reduces the side reactions such as dehydration and carbon deposition, improves the product quality, avoids the corrosion of the pipeline caused by using liquid concentrated sulfuric acid as a catalyst, and maximizes the activity of the catalyst to further improve the efficiency of the catalytic reaction. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structure schematic view of the catalyst in the utility model;

[0014] Figure 2 It is the structure schematic view of the preparation device in the utility model.

[0015] In the drawing: 1. cylinder; 2. straight face body; 3. control base; 4. heating plate; 5. reaction tank; 6. first bin; 7. second bin; 8. N2 jet flow ware; 9. pumping pipe; 10. pumping pump; 11. branch pipe; 12. screening tank; 13. receiving box; 14. control panel. DETAILED DESCRIPTION

[0016] Clearly, the described embodiments are merely a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the present utility model.

[0017] As shown in Figure 1 — Figure 2 The synthetic catalyst for n-butyl acetate is a solid acid catalyst, the main part is a rotating body with a straight hole in the central axis, including a cylindrical body 1 and a straight surface body 2 at both ends of the cylindrical body 1, the cross section of the straight surface body 2 is quadrangular, the straight surface body 2 rotates along the axial direction of the catalyst, and the mesh number of the synthetic catalyst for n-butyl acetate is 20-40 meshes. The solid acid catalyst is SO4 2- / Fe2O3-ZrO2-SiO2.

[0018] A synthetic n-butyl acetate preparation device, including control base 3, the surface of control base 3 is equipped with heating plate 4, the surface of heating plate 4 is equipped with reaction tank 5, the both sides of the top of reaction tank 5 are connected with first bin 6 and second bin 7 respectively, the connecting pipeline of first bin 6 and reaction tank 5 and the connecting pipeline of second bin 7 and reaction tank 5 are all equipped with electric valve, the side of reaction tank 5 is equipped with N2 jet device 8 inserted into reaction tank 5, the other end of the connecting end of N2 jet device 8 and reaction tank 5 is connected with N2 bottle through pipeline, the pipeline of N2 jet device 8 and N2 bottle is equipped with peristaltic pump, the inside of reaction tank 5 is filled with solid catalyst, the side of the lower part of reaction tank 5 is equipped with pumping pipe 9, one end of pumping pipe 9 is connected with pumping pump 10, the other end is connected with distribution pipe 11, the end of distribution pipe 11 is connected with screening tank 12, screening tank 12 is connected with material collecting box 13 through pipeline.

[0019] The side of control base 3 is equipped with control panel 14, and the control panel 14 is electrically connected with pumping pump 10 through an internal controller.

[0020] During the working of the present utility model, n-butanol liquid is poured into first bin 6, then sealed, and then acetic acid liquid is poured into second bin 7, and then the feeding port is sealed, the solid catalyst is filled in reaction tank 5, the amount of n-butanol and acetic acid entering reaction tank 5 is accurately controlled through control panel 14, heating plate 4 is started, the temperature is started to an appropriate temperature, then peristaltic pump is started, N2 jet device 8 is worked, jet flow is formed, after acetic acid and n-butanol liquid enter reaction tank 5, vaporization flow reaction is formed, and the quality of n-butyl acetate is ensured.

[0021] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. An apparatus for synthesizing n-butyl acetate, characterized in that: The device includes a control base, a heating plate on the surface of the control base, a reaction vessel on the surface of the heating plate, and a first hopper and a second hopper connected to the top two sides of the reaction vessel, respectively. The device is characterized in that: an N2 ejector is provided on the side of the reaction vessel and inserted into the reaction vessel; the other end of the N2 ejector is connected to an N2 bottle via a pipe; the inside of the reaction vessel is filled with a solid catalyst; a suction pipe is provided on one side of the lower part of the reaction vessel; one end of the suction pipe is connected to a suction pump, and the other end is connected to a distribution pipe; the end of the distribution pipe is connected to a screening tank; and the screening tank is connected to a receiving box via a pipe.

2. The apparatus for preparing n-butyl acetate according to claim 1, characterized in that: The control base is equipped with a control panel on its side, which is electrically connected to the material pump via an internal controller.

3. The apparatus for preparing n-butyl acetate according to claim 1, characterized in that: A peristaltic pump is installed on the pipe connecting the N2 ejector and the N2 bottle.

4. The apparatus for preparing n-butyl acetate according to claim 1, characterized in that: Electric valves are installed on the connecting pipes between the first silo and the reaction tank, and on the connecting pipes between the second silo and the reaction tank.

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