CN221693653U - A device for producing dibasic acid monoester - Google Patents

Abstract

The utility model discloses a device for producing dibasic acid monoester, relates to the technical field of chemical industry, and solves the technical problem that the dibasic acid monoester produced by a dibasic acid monoester preparation device in the prior art is low in purity. The device comprises a premixing kettle; the reaction kettle is communicated with the premixing kettle; the stirring plate is rotatably arranged in the reaction kettle and is provided with a containing cavity, a plurality of communication holes are formed in the outer side wall of the stirring plate, and the containing cavity is used for containing a solid catalyst; the driving piece is used for driving the disturbance plate to rotate; the temperature changing layer is arranged on the outer side wall of the reaction kettle and is used for adjusting the temperature in the reaction kettle; the recovery assembly is communicated with the reaction kettle through a pipeline, and the recovery assembly is communicated with the premixing kettle through a pipeline. Therefore, through the arrangement of the rotatably arranged disturbance plate, the contact area between molecules is increased, so that the reaction is more sufficient, and the purity of the diacid monoester prepared by the diacid monoester reaction device is higher.

Description

A device for producing dibasic acid monoester

Technical Field

The utility model relates to the technical field of chemical industry, in particular to a device for producing dibasic acid monoester.

Background Art

A dibasic acid is an acid that can produce two hydrogen ions after one of its molecules is ionized. Substances whose cations are all hydrogen ions when ionized (except water) belong to the acid class. Depending on the number of hydrogen ions produced by each acid molecule, it is called a polybasic acid, such as a monobasic acid, a dibasic acid, a tribasic acid, etc.

The monoesterification of dibasic acids is usually synthesized by three methods: one is partial hydrolysis of the diester in the presence of alkali; the second is direct partial esterification of the dibasic acid by controlling the alcohol-acid ratio; the third is mixing the dibasic acid and the diester and reacting at high temperature. Dibasic acid monoesters can be widely used in different industries such as pharmaceutical NMR, plastic processing and surfactants.

Since the content of monoester will affect its scope of use, the content of dibasic acid monoester obtained by conventional esterification reactor is between 50% and 80%. For industries with higher purity requirements, the monoester with lower content cannot be used directly and needs further purification, which leads to higher energy consumption costs.

Utility Model Content

The utility model provides a device for producing dibasic acid monoesters, which is used to solve the technical problem that the dibasic acid monoesters produced by the dibasic acid monoester preparation devices in the prior art have low purity.

The utility model is realized through the following technical solutions:

A device for producing dibasic acid monoesters, comprising:

A premixing kettle, which is used to mix and dissolve materials;

A reactor, wherein the reactor is connected to the premixing reactor via a pipeline;

A disturbance plate, the disturbance plate is rotatably mounted in the reactor, the disturbance plate has a receiving cavity, a plurality of connecting holes are opened on the outer side wall of the disturbance plate, and the receiving cavity is used to place a solid catalyst;

A driving member, the driving member is used to drive the disturbance plate to rotate;

A temperature-variable layer, which is installed on the outer wall of the reactor and is used to adjust the temperature in the reactor;

A recovery component is connected to the reaction kettle through a pipeline, and is connected to the premixing kettle through a pipeline, and is used to recover raw materials.

Furthermore, the premixing kettle comprises:

A shell, the shell is connected to the reactor and is used to hold materials;

A stirrer is rotatably mounted in the shell and is used to stir the material.

Furthermore, the agitator is a paddle agitator.

Furthermore, the agitator is an anchor agitator.

Furthermore, a feed inlet is provided at the top of the disturbance plate, and a sealing plug is inserted at the feed inlet.

Further, the recycling component comprises:

A condensation tower, wherein a feed inlet of the condensation tower is connected to the exhaust port of the reaction kettle, and a discharge port of the condensation tower is connected to the premixing kettle;

A pressure reducing pump is connected to the condensing tower.

Furthermore, the solid catalyst is a super acid solid.

Furthermore, the temperature-changing layer is a structural member made of coils.

Furthermore, the device also includes:

A cut-off valve is installed between the premixing kettle and the reaction kettle, between the reaction kettle and the recovery component, and between the recovery component and the premixing kettle.

Furthermore, the driving member is a booster pump, and the disturbance plate rotates around a preset axis under the blowing of the airflow output by the booster pump.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

The dibasic acid monoester reaction device provided by the utility model comprises a premixing kettle, a reactor, a disturbance plate, a driving member, a temperature-variable layer and a recovery component. The premixing kettle is used for mixing and dissolving materials. The reactor and the premixing kettle are connected by a pipeline. The disturbance plate is rotatably installed in the reactor. The disturbance plate has a containing cavity. The outer side wall of the disturbance plate is provided with a plurality of connecting holes. The containing cavity is used for placing a solid catalyst. The driving member is used for driving the disturbance plate to rotate. The temperature-variable layer is installed on the outer side wall of the reactor. The temperature-variable layer is used for adjusting the temperature in the reactor. The recovery component is connected with the reactor by a pipeline. The recovery component is connected with the premixing kettle by a pipeline. The recovery component is used for recovering raw materials.

Through the above structure, when the dibasic acid monoester reaction device provided by the utility model is used to esterify the dibasic acid, the dibasic acid and excess methanol are first poured into the premixing kettle, and the dibasic acid and methanol are stirred so that the dibasic acid and methanol are mixed and dissolved in the premixing kettle, and then the reactor is opened, and the solid catalyst is placed in the accommodating cavity of the disturbance plate, and then the reactor is closed, and then the mixture of the dibasic acid and methanol is transported into the reactor, and then heating is started through the temperature-variable layer installed on the outer wall of the reactor, and at the same time, the driving member is connected to make the driving member start to work, so that the disturbance plate rotates in the reactor to stir the reaction. The dibasic acid and methanol in the reactor, while the disturbance plate rotates in the reactor, drives the solid catalyst in the disturbance plate to move in the mixture of dibasic acid and methanol. Through the setting of multiple connecting holes on the outer wall of the disturbance plate, the solid catalyst is fully contacted with the mixture of dibasic acid and methanol to catalyze the esterification of dibasic acid with methanol, thereby improving the purity of dibasic acid monoester. After the esterification reaction is completed, the temperature in the reactor is lowered again through the temperature-variable layer, and the excess methanol is recovered through the recovery component and transported to the premixing reactor when the next esterification reaction is carried out. In this way, methanol is reused and resources are saved. Therefore, by setting the rotatably installed disturbance plate, the intermolecular contact area is increased, the reaction is more sufficient, and the purity of the dibasic acid monoester prepared by the dibasic acid monoester reaction device provided by the utility model is higher.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

FIG1 is a schematic structural diagram of a dibasic acid monoester reaction device provided in an embodiment of the utility model.

Marks and corresponding parts names in the attached drawings:

1-premixing kettle, 11-housing, 12-agitator, 2-reactor, 3-disturbance plate, 31-sealing plug, 4-driving member, 5-temperature variable layer, 6-recovery component, 61-condensation tower, 62-pressure reducing pump.

DETAILED DESCRIPTION

In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to the other component.

It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

Example:

This embodiment provides a device for producing dibasic acid monoesters, which is used to solve the technical problem that the dibasic acid monoesters produced by the dibasic acid monoester preparation device in the prior art have low purity. The device for producing dibasic acid monoesters includes a premixing kettle 1, a reaction kettle 2, a disturbance plate 3, a driving member 4, a temperature-variable layer 5, and a recovery component 6, wherein:

The premixing kettle 1 is used to mix and dissolve materials. Through the setting of the premixing kettle 1, the dibasic acid and excess methanol are put into the premixing kettle 1 for mixing, so that the reaction sites are increased, thereby increasing the contact time of methanol and the dibasic acid, thereby improving the purity of the dibasic acid monoester.

The reaction kettle 2 is connected to the premixing kettle 1 through a pipeline. After the methanol and the dibasic acid are fully mixed, they are transported into the reaction kettle 2 for esterification reaction.

The disturbance plate 3 is rotatably installed in the reactor 2. Specifically, a rotating shaft is fixedly installed on the top wall and the bottom wall of the disturbance plate 3, and is located at the center of the disturbance plate 3. Grooves adapted to the rotating shaft are provided on the inner top wall and the inner bottom wall of the reactor 2. Two rotating shafts are rotatably installed in the two grooves, respectively. The disturbance plate 3 has a accommodating cavity. The outer side wall of the disturbance plate 3 is provided with a plurality of connecting holes. The accommodating cavity is used to place a solid catalyst. Through the setting of the disturbance plate 3, the dibasic acid and methanol are stirred so that the methanol and the dibasic acid fully react. The setting of the accommodating cavity facilitates the placement of the catalyst. When the disturbance plate 3 rotates, it will drive the catalyst in the accommodating cavity to move in the mixture of the dibasic acid and the methanol. The setting of the plurality of connecting holes allows the catalyst to merge with the mixture of the dibasic acid and the methanol, further catalyzing the esterification of the dibasic acid with the methanol.

The driving member 4 is used to drive the disturbance plate 3 to rotate.

The temperature variable layer 5 is installed on the outer wall of the reactor 2. The temperature variable layer 5 is used to adjust the temperature inside the reactor 2. Through the setting of the temperature variable layer 5, heat is provided during the esterification reaction; after the esterification reaction is completed, the heat of the reactor 2 is taken away to reduce the temperature of the reactor 2.

The recovery component 6 is connected to the reactor 2 through a pipeline, and the recovery component 6 is connected to the premixing reactor 1 through a pipeline. The recovery component 6 is used to recover raw materials. Through the setting of the recovery component 6, after the esterification is completed, the excess methanol in the reactor 2 is recovered; when the next esterification reaction is carried out, the methanol is transported to the premixing reactor 1 again for secondary utilization to reduce resource waste.

Through the above structure, when the dibasic acid monoester reaction device provided by the utility model is used to esterify the dibasic acid, the dibasic acid and excess methanol are first poured into the premixing kettle 1, and the dibasic acid and methanol are stirred so that the dibasic acid and methanol are mixed and dissolved in the premixing kettle 1, and then the reactor 2 is opened, and the solid catalyst is placed in the accommodating cavity of the disturbance plate 3, and then the reactor 2 is closed, and then the mixture of the dibasic acid and methanol is transported into the reactor 2, and then heating is started through the temperature-changing layer 5 installed on the outer wall of the reactor 2, and at the same time, the driving member 4 is connected to make the driving member 4 start to work, so that the disturbance plate 3 rotates in the reactor 2 to stir the reaction. The dibasic acid and methanol in the reactor 2 are reacted, and the disturbance plate 3 rotates in the reactor 2, driving the solid catalyst in the disturbance plate 3 to move in the mixture of dibasic acid and methanol. The solid catalyst is fully contacted with the mixture of dibasic acid and methanol through the arrangement of multiple connecting holes on the outer wall of the disturbance plate 3 to catalyze the esterification of dibasic acid with methanol, thereby improving the purity of dibasic acid monoester. After the esterification reaction is completed, the temperature in the reactor 2 is lowered again through the temperature-variable layer 5, and the excess methanol is recovered through the recovery component 6, and is transported to the premixing reactor 1 when the next esterification reaction is carried out, so that methanol is reused for the second time and resources are saved. Therefore, by the arrangement of the rotatably installed disturbance plate 3, the intermolecular contact area is increased, the reaction is more sufficient, and the purity of the dibasic acid monoester prepared by the dibasic acid monoester reaction device provided by the utility model is higher.

An optional implementation of this embodiment is as follows: the premixing kettle 1 includes a shell 11 and an agitator 12, wherein:

The outer shell 11 is connected to the reaction kettle 2 and is used for containing materials.

The agitator 12 is rotatably installed in the housing 11. The agitator 12 is used to stir the materials. Through the setting of the agitator 12, when the dibasic acid and the excess methanol are premixed, the dibasic acid and the methanol are stirred so that the dibasic acid and the methanol are fully mixed.

Optionally, the agitator 12 is a paddle agitator, which has a simple structure and is easy to use.

Optionally, the agitator 12 is an anchor agitator, which can increase the mixing of the materials in the container.

An optional implementation of this embodiment is as follows: a feed inlet is provided at the top of the disturbance plate 3, and a sealing plug 31 is inserted into the feed inlet. In this way, the solid catalyst is easily placed in the accommodating cavity of the disturbance plate 3 through the setting of the feed inlet.

An optional implementation of this embodiment is as follows: the recovery component 6 includes a condensation tower 61 and a pressure reducing pump 62, wherein:

The feed port of the condensation tower 61 is connected to the exhaust port of the reaction kettle 2 , and the discharge port of the condensation tower 61 is connected to the premixing kettle 1 .

The pressure reducing pump 62 is connected to the condensing tower 61 .

Through the above structure, when the esterification reaction is completed, the vaporized methanol in the reactor 2 is pumped into the condensation tower 61 through the pressure reducing pump 62, so that the gaseous methanol is cooled and liquefied through the condensation tower 61 and collected in the condensation tower 61. When the next esterification reaction is required, it is transported to the pre-mixing reactor 1 through the discharge port of the condensation tower 61.

An optional implementation of this embodiment is as follows: the solid catalyst is a superacid solid, which has the advantages of being easily separated from the reactants, being reusable, and not corroding the reactor.

An optional implementation of this embodiment is as follows: the temperature-changing layer 5 is a structural member made of a coil, and the coil is a spiral pipe that is spirally arranged on the outer wall of the reactor 2, which can adjust the temperature in the reactor 2 more quickly.

An optional implementation of this embodiment is as follows: the device further includes a cut-off valve, wherein:

Isolation valves are installed between the premixing kettle 1 and the reaction kettle 2, between the reaction kettle 2 and the recovery component 6, and between the recovery component 6 and the premixing kettle 1. Thus, the arrangement of the isolation valves makes it easier to transport liquids.

An optional implementation of the present embodiment is as follows: the driving member 4 is a booster pump, and the disturbance plate 3 rotates around a preset axis under the blowing of the airflow output by the booster pump. Specifically, the booster pump is connected to the reactor 2 through an air duct, one end of the air duct is connected to the airflow output end of the booster pump, and a circular hole is opened on the side wall of the reactor 2, the circular hole is located at the upper part of the reactor 2, and the distance between the horizontal plane where the axis of the circular hole is located and the inner bottom wall of the reactor 2 is smaller than the distance between the top wall of the disturbance plate 3 and the inner bottom wall of the reactor 2, and the other end of the air duct is installed in the circular hole and extends into the reactor 2.

The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims (10)

1. An apparatus for producing a dibasic acid monoester, comprising:

The premixing kettle (1) is used for mixing and dissolving materials;

The reaction kettle (2) is communicated with the pre-mixing kettle (1) through a pipeline;

The stirring plate (3) is rotatably arranged in the reaction kettle (2), the stirring plate (3) is provided with a containing cavity, a plurality of communication holes are formed in the outer side wall of the stirring plate (3), and the containing cavity is used for containing a solid catalyst;

The driving piece (4) is used for driving the disturbance plate (3) to rotate;

The temperature changing layer (5) is arranged on the outer side wall of the reaction kettle (2), and the temperature changing layer (5) is used for adjusting the temperature in the reaction kettle (2);

Recovery subassembly (6), recovery subassembly (6) with reation kettle (2) are through pipeline intercommunication setting, recovery subassembly (6) with premix cauldron (1) are through pipeline intercommunication setting, recovery subassembly (6) are used for retrieving the raw materials.

2. An apparatus for producing dibasic acid monoesters according to claim 1, characterized in that said premixing tank (1) comprises:

The shell (11) is communicated with the reaction kettle (2), and the shell (11) is used for containing materials;

And the stirrer (12) is rotatably arranged in the shell (11), and the stirrer (12) is used for stirring the materials.

3. An apparatus for producing dibasic acid monoester according to claim 2, characterized in that the stirrer (12) is a paddle stirrer.

4. An apparatus for producing dibasic acid monoester according to claim 2, characterized in that the stirrer (12) is an anchor stirrer.

5. Device for producing dibasic acid monoester according to claim 1, characterized in that the top end of the disturbance plate (3) is provided with a feed inlet, and the feed inlet is plugged with a plugging plug (31).

6. An apparatus for producing dibasic acid monoesters according to claim 1, characterized in that said recovery assembly (6) comprises:

the feeding port of the condensing tower (61) is communicated with the exhaust port of the reaction kettle (2), and the discharging port of the condensing tower (61) is communicated with the premixing kettle (1);

And a pressure reducing pump (62), wherein the pressure reducing pump (62) is communicated with the condensing tower (61).

7. An apparatus for producing dibasic acid monoester according to claim 1 wherein the solid catalyst is a super acid solid.

8. An apparatus for producing dibasic acid monoesters according to claim 1, characterized in that the temperature changing layer (5) is a structural member made of coiled tubing.

9. An apparatus for producing dibasic acid monoester according to any of claims 1-8, characterized in that the apparatus further comprises:

And the isolating valve is arranged between the premixing kettle (1) and the reaction kettle (2), between the reaction kettle (2) and the recycling component (6), and between the recycling component (6) and the premixing kettle (1).

10. An apparatus for producing dibasic acid monoesters according to any of claims 1-8, characterized in that the driving member (4) is a booster pump and the disturbance plate (3) is rotated about a preset axis under the blowing of the output air flow of the booster pump.