Esterification reaction kettle for ethyl acetate production

Abstract

The utility model discloses an esterification reaction kettle for producing ethyl acetate, and relates to the technical field of organic chemical industry. The esterification kettle comprises an esterification kettle main body, a steam pipe, a condensation cavity and a transparent liquid separation cylinder, one side of the top end of the esterification kettle main body is fixedly communicated with the steam pipe, one end, far away from the esterification kettle main body, of the steam pipe is fixedly communicated with a condensation coil pipe, the bottom end of the condensation coil pipe is fixedly communicated with a liquid conveying pipe, and the bottom end of the liquid conveying pipe is fixedly communicated with the condensation cavity; the bottom end of the condensation cavity fixedly communicates with a liquid outlet pipe, and the end, away from the condensation cavity, of the liquid outlet pipe fixedly communicates with a transparent liquid separation cylinder. Through the arrangement of the esterification kettle main body, the steam pipe, the condensation cavity and the transparent liquid separation cylinder, the problems that the energy consumption is higher, more pipelines are laid and the equipment cost is higher when condensed water is required to participate in an esterification reaction kettle, and the water of ethyl acetate is required to be removed when esterification is completed, and the conveying process is not smooth enough are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of organic chemical industry, in particular to an esterification reaction kettle for ethyl acetate production. Background Art

[0002] Ethyl acetate, also known as ethyl acetate, is an organic compound with the chemical formula C4H8O2. It is an ester compound with a fruity aroma and is often used as a solvent, food flavoring and cleaning degreasing agent. The boiling point of ethyl acetate is about 76.5 to 77.5 degrees Celsius, and the density is about 0.902 g / cm³. It is slightly soluble in water, but soluble in many organic solvents, such as ethanol, acetone, ether and benzene. Ethyl acetate esterification reactor is a chemical equipment specially used for esterification reaction. Esterification reaction is an organic chemical reaction, which usually involves alcohol and acid in the presence of a catalyst to generate ester and water. The design and operating conditions of ethyl acetate esterification reactor have an important influence on the efficiency of the reaction and the quality of the product, but it still has the following disadvantages in actual use:

[0003] In the process of ethyl acetate reaction in the esterification reactor, after esterification, the ethyl acetate needs to be evaporated and then condensed to distill the ethyl acetate, and then the distilled mixed liquid is separated to produce ethyl acetate. During the distillation process, a condenser is required to cooperate with condensation. During condensation, steam is directly passed through the pipeline and condensed during the transportation of condensed water. During the operation, condensed water is involved, which requires greater energy consumption, more pipelines are laid, and the equipment cost is higher;

[0004] After the esterification reactor completes the reaction, the condensed mixed liquid is transported and water needs to be deposited at the bottom. It needs to be separated before it can be transported. During the operation, it is necessary to constantly shut down and open the valve to resume work. The transportation process of ethyl acetate is not smooth enough. Utility Model Content

[0005] The utility model aims to provide an esterification reaction kettle for ethyl acetate production. By arranging an esterification reaction kettle main body, a steam pipe, a condensation chamber and a transparent liquid separation cylinder, the utility model solves the problems that the esterification reaction kettle needs condensed water to participate, the energy consumption is greater, more pipelines are laid, the equipment cost is high, and the water of ethyl acetate needs to be removed to complete the esterification, and the transportation process is not smooth enough.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses an esterification reaction kettle for ethyl acetate production, comprising an esterification kettle main body, a steam pipe, a condensation chamber and a transparent liquid separation cylinder. One side of the top of the esterification kettle main body is fixedly connected with the steam pipe, one end of the steam pipe away from the esterification kettle main body is fixedly connected with a condensation coil, the bottom end of the condensation coil is fixedly connected with a liquid infusion pipe, the bottom end of the liquid infusion pipe is fixedly connected with the condensation chamber, the bottom end of the condensation chamber is fixedly connected with a liquid outlet pipe, and one end of the liquid outlet pipe away from the condensation chamber is fixedly connected with a transparent liquid separation cylinder. When working, after acetic acid and ethanol are transported into the esterification kettle main body through the esterification kettle main body, esterification is carried out after catalysis by concentrated sulfuric acid, and after esterification, the evaporated steam is transported into the steam pipe, transported into the condensation coil through the steam pipe, transported into the liquid infusion pipe through the condensation coil, transported into the condensation chamber through the liquid infusion pipe, and liquid is transported into the transparent liquid separation cylinder in the condensation chamber, and liquid is separated in the transparent liquid separation cylinder.

[0008] Furthermore, a stirring assembly is fixed through the center of the top of the esterification kettle body, and a bracket one is fixed in the middle of the outer peripheral surface of the esterification kettle body. The esterification kettle body stirs the reactants therein through the stirring assembly, and the esterification kettle body is supported on the ground by the bracket one.

[0009] Furthermore, a raw material pipe 1 is fixedly connected in front of the stirring assembly at the top of the esterification kettle body, and a raw material pipe 2 is fixedly connected behind the stirring assembly at the top of the esterification kettle body. The esterification kettle body transports acetic acid into it through the raw material pipe 1, and transports ethanol into it through the raw material pipe 2.

[0010] Furthermore, a second bracket is fixed to the lower part of the outer peripheral surface of the condensation chamber, and one end of the liquid outlet pipe away from the condensation chamber is arranged at the lower part of the peripheral side of the transparent liquid separation cylinder, and the condensation chamber is supported on the ground by the second bracket.

[0011] Furthermore, a discharge pipe is fixed to the upper part of the outer peripheral surface of the transparent liquid separation cylinder, the inner diameters of the discharge pipe and the liquid discharge pipe are equal, and the transparent liquid separation cylinder transports the ethyl acetate received therein to the purification equipment through the discharge pipe.

[0012] Furthermore, the bottom end of the transparent liquid-separating cylinder is fixedly connected to a water outlet pipe, and a control valve is fixed on the peripheral side of the water outlet pipe. The transparent liquid-separating cylinder discharges water therein through the water outlet pipe under the control of the control valve to perform liquid separation operation.

[0013] The utility model has the following beneficial effects:

[0014] The utility model solves the problems that the esterification reaction kettle needs condensed water to participate, the energy consumption is greater, more pipelines are laid, and the equipment cost is high by arranging an esterification kettle main body, a steam pipe and a condensation chamber. The esterification kettle main body transports acetic acid into it through a raw material pipe one, and transports ethanol into it through a raw material pipe two, and the transport flow rate of ethanol is . times that of acetic acid. During operation, the esterification kettle main body is started for heating, so that the acetic acid and ethanol produce an esterification reaction to produce ethyl acetate, which is evaporated and transported to the steam pipe, and then transported to the condensation coil through the steam pipe. After condensation through the condensation coil, it is transported to the infusion pipe, and then transported to the condensation chamber through the infusion pipe. Condensation is more convenient, requires lower energy consumption, fewer pipelines to be laid, and has lower equipment cost.

[0015] The utility model solves the problem that the water of ethyl acetate needs to be removed from the esterification reaction kettle after esterification, and the transportation process is not smooth enough by arranging a steam pipe, a condensation chamber and a transparent liquid separation cylinder. The mixed liquid is transported to the transparent liquid separation cylinder through a liquid outlet pipe at the bottom of the condensation chamber. In the transparent liquid separation cylinder, condensed water is deposited at the bottom, and ethyl acetate floats on the water. The ethyl acetate is transported to the purification equipment through the discharge pipe. When a large amount of condensed water is deposited in the transparent liquid separation cylinder, the control valve is opened to allow the condensed water in the transparent liquid separation cylinder to be transported to the equipment for extracting ethyl acetate in water through the water outlet pipe, so that the ethyl acetate dissolved in water is extracted. When the liquid level in the transparent liquid separation cylinder drops to near the water outlet pipe, the control valve is closed, so that the mixed liquid can be continuously transported without stopping the machine for liquid separation, and the transportation process is smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a stereogram of the assembly structure of an esterification reaction kettle for ethyl acetate production;

[0018] Figure 2 It is a three-dimensional diagram of the main structure of the esterification kettle;

[0019] Figure 3 It is a three-dimensional diagram of the steam pipe structure;

[0020] Figure 4 It is a three-dimensional diagram of the condensation chamber structure;

[0021] Figure 5 It is a three-dimensional diagram of the transparent liquid dispensing cylinder structure.

[0022] Reference numerals:

[0023] 1. Esterification kettle body; 101. Raw material pipe 1; 102. Raw material pipe 2; 103. Bracket 1; 104. Stirring assembly; 2. Steam pipe; 201. Condensation coil; 202. Infusion pipe; 3. Condensation chamber; 301. Liquid outlet pipe; 302. Bracket 2; 4. Transparent liquid separation cylinder; 401. Discharge pipe; 402. Water outlet pipe; 403. Control valve. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Specific embodiment 1

[0025] See also Figure 1-5 The utility model is an esterification reaction kettle for ethyl acetate production, comprising an esterification kettle body 1, a steam pipe 2, a condensation chamber 3 and a transparent liquid separation cylinder 4. One side of the top of the esterification kettle body 1 is fixedly connected with the steam pipe 2, ethanol and acetic acid are contained in the esterification kettle body 1, and esterification is carried out under the catalysis of concentrated sulfuric acid reserved in the esterification kettle body 1. The steam generated in the esterification kettle body 1 is transported to the condensation coil 201 through the steam pipe 2, and one end of the steam pipe 2 away from the esterification kettle body 1 is fixedly connected with the condensation coil 201, and the bottom end of the condensation coil 201 is fixedly connected with an infusion pipe 202, and the infusion pipe The bottom end of 202 is fixedly connected with a condensation chamber 3. When the ethyl acetate vapor and water transported in the steam pipe 2 are transported to the condensation coil 201, they are condensed through the condensation coil 201 and then transported to the infusion pipe 202. They are transported to the condensation chamber 3 through the infusion pipe 202 and temporarily stored through the condensation chamber 3. The bottom end of the condensation chamber 3 is fixedly connected with a liquid outlet pipe 301. One end of the liquid outlet pipe 301 away from the condensation chamber 3 is fixedly connected with a transparent liquid separator 4. The condensation chamber 3 is transported to the transparent liquid separator 4 through the liquid outlet pipe 301. After being precipitated through the transparent liquid separator 4, they are transported to the transparent liquid separator 4 through the liquid outlet pipe 301.

[0026] Specifically, a stirring assembly 104 is fixed through the center of the top of the esterification kettle body 1, and a bracket 103 is fixed in the middle of the outer peripheral surface of the esterification kettle body 1. The esterification kettle body 1 stirs the reacting raw materials through the stirring assembly 104, and the esterification kettle body 1 is supported on the ground by the bracket 103.

[0027] Furthermore, a raw material pipe 101 is fixedly connected in front of the stirring assembly 104 at the top of the esterification kettle main body 1, and a raw material pipe 2 102 is fixedly connected at the rear of the stirring assembly 104 at the top of the esterification kettle main body 1. The esterification kettle main body 1 transports acetic acid into it through the raw material pipe 101, and transports ethanol into it through the raw material pipe 2 102, and the transport flow rate of ethanol is 1.15 times that of acetic acid.

[0028] The operation process of this embodiment is as follows: when working, the esterification kettle body 1 transports acetic acid therein through the raw material pipe 101, and transports ethanol therein through the raw material pipe 2 102, and the transport flow rate of ethanol is 1.15 times that of acetic acid. During the working process, the esterification kettle body 1 is started to heat, so that the acetic acid and ethanol produce an esterification reaction to produce ethyl acetate, which is evaporated and transported to the steam pipe 2, and then transported to the condensing coil 201 through the steam pipe 2. After condensation through the condensing coil 201, it is transported to the infusion pipe 202, and then transported to the condensing chamber 3 through the infusion pipe 202. Specific embodiment 2

[0029] See also Figure 1 , 4 5. On the basis of the specific embodiment 1, a bracket 2 302 is fixed to the lower part of the outer peripheral surface of the condensation chamber 3, and the end of the liquid outlet pipe 301 away from the condensation chamber 3 is arranged at the lower part of the peripheral side of the transparent liquid separator 4. The condensation chamber 3 is supported on the ground by the bracket 2 302. The ethyl acetate, water vapor and other impurities in the condensation chamber 3 are transported to the liquid outlet pipe 301, and then transported to the transparent liquid separator 4 through the liquid outlet pipe 301. The ethyl acetate floats above the condensed water, and the condensed water is deposited in the lower part of the transparent liquid separator 4.

[0030] Specifically, a discharge pipe 401 is fixed to the upper part of the outer peripheral surface of the transparent liquid separation cylinder 4 , and the inner diameters of the discharge pipe 401 and the liquid discharge pipe 301 are equal. The transparent liquid separation cylinder 4 transports the ethyl acetate floating on the condensed water to the purification equipment through the discharge pipe 401 .

[0031] Furthermore, the bottom end of the transparent liquid separating cylinder 4 is fixedly connected to a water outlet pipe 402, and a control valve 403 is fixed on the peripheral side of the water outlet pipe 402. The transparent liquid separating cylinder 4 outputs the condensed water through the water outlet pipe 402, and the output rate and output on-off of the water in the transparent liquid separating cylinder 4 discharged from the water outlet pipe 402 are controlled by the control valve 403.

[0032] The operation process of this embodiment is as follows: during operation, when the condensed ethyl acetate, water and other impurities transported in the infusion tube 202 fall into the condensation chamber 3, they are deposited in the condensation chamber 3, and the mixed liquid is transported to the transparent liquid separation cylinder 4 through the liquid outlet pipe 301 at the bottom of the condensation chamber 3. In the transparent liquid separation cylinder 4, the condensed water is deposited at the bottom and the ethyl acetate floats on the water. The ethyl acetate is transported to the purification equipment through the discharge pipe 401. When a large amount of condensed water is deposited in the transparent liquid separation cylinder 4, the control valve 403 is opened, so that the condensed water in the transparent liquid separation cylinder 4 is transported to the equipment for extracting ethyl acetate in water through the outlet pipe 402, so that the ethyl acetate dissolved in water is extracted. When the liquid level in the transparent liquid separation cylinder 4 drops to near the outlet pipe 402, the control valve 403 is closed, so that the mixed liquid can be continuously transported without stopping the machine for separation.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0034] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An esterification reaction kettle for ethyl acetate production, comprising an esterification kettle body (1), a steam pipe (2), a condensation chamber (3) and a transparent liquid separation cylinder (4), characterized in that: A steam pipe (2) is fixedly connected to one side of the top of the esterification kettle body (1); an end of the steam pipe (2) away from the esterification kettle body (1) is fixedly connected to a condensation coil (201); a bottom end of the condensation coil (201) is fixedly connected to a liquid infusion pipe (202); a bottom end of the liquid infusion pipe (202) is fixedly connected to a condensation chamber (3); a bottom end of the condensation chamber (3) is fixedly connected to a liquid outlet pipe (301); and an end of the liquid outlet pipe (301) away from the condensation chamber (3) is fixedly connected to a transparent liquid separation cylinder (4).

2. The esterification reaction kettle for ethyl acetate production according to claim 1, characterized in that: A stirring assembly (104) is fixed through the center of the top of the esterification kettle body (1), and a bracket 1 (103) is fixed in the middle of the outer peripheral surface of the esterification kettle body (1).

3. An esterification reaction kettle for ethyl acetate production according to claim 2, characterized in that: The stirring assembly (104) at the top of the esterification kettle body (1) is fixedly connected to a raw material pipe 1 (101) in front, and the stirring assembly (104) at the top of the esterification kettle body (1) is fixedly connected to a raw material pipe 2 (102) at the rear.

4. The esterification reaction kettle for ethyl acetate production according to claim 1, characterized in that: A second bracket (302) is fixed to the lower portion of the outer peripheral surface of the condensation chamber (3), and one end of the liquid outlet pipe (301) away from the condensation chamber (3) is arranged at the lower portion of the peripheral side of the transparent liquid separation cylinder (4).

5. The esterification reaction kettle for ethyl acetate production according to claim 1, characterized in that: A discharge pipe (401) is fixed to the upper portion of the outer peripheral surface of the transparent liquid dispensing cylinder (4), and the inner diameters of the discharge pipe (401) and the liquid discharge pipe (301) are equal.

6. The esterification reaction kettle for ethyl acetate production according to claim 1, characterized in that: The bottom end of the transparent liquid dispensing cylinder (4) is fixedly connected to a water outlet pipe (402), and a control valve (403) is fixed on the peripheral side of the water outlet pipe (402).

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