CN211800862U - Continuous esterification reaction device - Google Patents
Continuous esterification reaction device Download PDFInfo
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- CN211800862U CN211800862U CN201921221327.6U CN201921221327U CN211800862U CN 211800862 U CN211800862 U CN 211800862U CN 201921221327 U CN201921221327 U CN 201921221327U CN 211800862 U CN211800862 U CN 211800862U
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- esterification
- esterification reaction
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Abstract
The utility model discloses a continuous esterification reaction device relates to organic chemical synthesis technical field, including static mixer, pre-heater, the cauldron of esterifying, static mixer's entry is equipped with the feed inlet that supplies acid organic matter, alcohols organic matter and catalyst pan feeding respectively, and static mixer exit linkage pre-heater esterifies the cauldron bottom and is equipped with the feed inlet that is connected with the discharge gate of pre-heater, esterifies cauldron upper portion and is equipped with the discharge gate, esterifies the cauldron top and is equipped with the gas phase export, and the gas phase export is connected with condensing system. The utility model provides a current esterification reaction device reaction intermittent type time long, the poor and low technical problem of production efficiency of serialization productivity, the utility model discloses an esterification reaction's continuous high efficiency goes on, has stopped the intermittent type nature of reaction, simultaneously the utility model discloses still have simple structure, the cost of manufacture is low, fortune dimension convenient characteristics.
Description
Technical Field
The utility model relates to an organic chemical synthesis technical field, in particular to continuous esterification reaction device.
Background
Most of esterification reactions are carried out in a reaction kettle, the reaction kettle is provided with a jacket for heating and stirring mixed materials, water generated by the esterification reaction is removed by an entrainer, and the materials are fed and discharged intermittently. The reaction method has long reaction time, low production efficiency and complex operation, and is difficult to realize automation. In the known continuous esterification reaction device, the structure is complex, the operation is not easy, or water generated in the reaction cannot be removed in time, so that the reaction rate is influenced.
Patent CN202366684U discloses a continuous esterification reaction kettle. The method is that the materials are mixed in a stirring kettle and then are pumped into a reaction elbow in an esterification kettle through a metering pump for reaction, and hot oil is introduced into the esterification kettle to heat the reaction elbow in the kettle. The method has long esterification reaction intermittence time, can not realize continuous production, and has low heat transfer efficiency and production efficiency.
Disclosure of Invention
To above defect, the utility model aims at providing a continuous esterification reaction device aims at solving the technical problem that current esterification reaction device reaction intermittent type time is long, serialization productivity is poor and production efficiency is low.
In order to solve the technical problem, the technical scheme of the utility model is that:
the utility model provides a continuous esterification reaction device, includes static mixer, pre-heater, the cauldron of esterifying, and the static mixer entry is equipped with the feed inlet that supplies sour organic matter, alcohols organic matter and catalyst pan feeding respectively, and static mixer exit linkage pre-heater, the cauldron bottom of esterifying are equipped with the feed inlet that is connected with the discharge gate of pre-heater, and cauldron upper portion of esterifying is equipped with the discharge gate, and the cauldron top of esterifying is equipped with the gas phase export, and the gas phase exit linkage has condensing system.
Wherein, condensing system includes the condenser, and the gaseous phase export of esterifying the cauldron is connected with the entry of condenser, and the exit linkage of condenser is received the jar.
Wherein the condenser is connected with a vacuum system.
Wherein, the kettle body of the esterification kettle is provided with a jacket which is connected with a heating component.
Wherein, the esterification kettle is provided with one or more, and a plurality of esterification kettles are connected in series.
Wherein the catalyst is a liquid catalyst.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
because continuous esterification reaction unit includes static mixer, the pre-heater, the cauldron of esterifying, the gaseous phase exit linkage of the cauldron of esterifying has condensing system, the raw materials mixes through static mixer, preheat by the pre-heater again, at last in the cauldron rapid heating reaction of esterifying, go on the heating segmentation of mixture, the heating and the reaction time of mixture at the cauldron of esterifying have been reduced, make the entering cauldron of esterifying that the mixture can last, thereby the high efficiency of esterification reaction is gone on fast, condensing system has guaranteed the quick dewatering of esterification reaction in-process, the aqueous phase product of avoiding the reaction influences reaction rate.
To sum up, the utility model provides a current esterification reaction device reaction intermittent type time long, the poor and low technical problem of production efficiency of serialization productivity, the utility model discloses a continuous high-efficient of esterification reaction goes on, has stopped the intermittent type nature of reaction, simultaneously the utility model discloses still have simple structure, the cost of manufacture is low, fortune dimension convenient characteristics.
Drawings
FIG. 1 is a schematic structural diagram of the continuous esterification apparatus of the present invention.
In the figure, 1-static mixer, 2-preheater, 3-esterification kettle, 30-condenser, 31-receiving tank, 32-vacuum system, and 33-discharge port.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The directions referred to in the description are based on the directions of the continuous esterification reaction device in normal operation, and the directions of the continuous esterification reaction device in storage and transportation are not limited, and only represent relative positional relationship, but not absolute positional relationship.
As shown in fig. 1, the continuous esterification reaction device comprises a static mixer 1, a preheater 2, an esterification kettle 3, a feeding port of the static mixer 1 is connected to one end connector of a four-way connector, the other three connectors of the four-way connector are respectively connected to an acid organic storage tank, an alcohol organic storage tank and a catalyst storage tank, the catalyst is preferably a liquid catalyst, the acid organic storage tank, the alcohol organic storage tank and the catalyst storage tank are used for conveying materials into the static mixer 1 and are all completed through a feeding pump, and a speed regulating valve is arranged on a pipeline connected to the feeding pump and is used for controlling the flow of the acid organic, the alcohol organic and the catalyst, the proportion of each material is ensured, the three materials are efficiently mixed in the static mixer 1 to form a mixed material, and the mixed material is output through an outlet of the static.
As shown in fig. 1, the outlet of the static mixer 1 is connected with a preheater 2, the preheater 2 is used for primarily heating the mixture, specifically, the heat exchange is adopted, the heat medium continuously exchanges heat with the mixture by controlling the circulation of the heat medium, so as to preheat the mixture, the feed inlet of the esterification kettle 3 is positioned at the bottom of the kettle body, the preheated mixture enters the kettle body through the bottom of the kettle body,
as shown in fig. 1, the mixed material enters into esterification reactor 3, and thermometer and manometer are installed at the top of the 3 cauldron bodies of esterification reactor for the control of temperature and pressure in esterification reactor 3, and the cauldron body outside of esterification reactor 3 is cup jointed and is pressed from both sides the cover, presss from both sides the cover and is connected with heating element, and heating element carries out the heat exchange through control heat medium and 3 cauldron bodies of esterification reactor, thereby heats esterification reactor 3. In the heating process, the mixed materials are subjected to esterification reaction, a discharge hole 33 is formed in the upper portion of the kettle body, a gas phase outlet is formed in the top of the kettle body, ester organic matters generated by the esterification reaction overflow through the discharge hole 33 in the upper portion of the kettle body and enter a finished product tank, and water generated by the esterification reaction is vaporized and then enters a condensation system through the gas phase outlet. The condensing system comprises a condenser 30, wherein a gas phase outlet of the esterification kettle 3 is connected with an inlet of the condenser 30, and an outlet of the condenser 30 is connected with a receiving tank 31.
As shown in fig. 1, a vacuum system 32 is connected to the condenser 30. The vacuum system 32 effectively reduces the energy consumption of the condenser 30 and improves the condensing efficiency. And the pressure in the esterification kettle 3 is regulated and controlled by the vacuum system 32, so that the stable esterification reaction is ensured.
As shown in fig. 1, one or more esterification kettles 3 can be arranged, and a plurality of esterification kettles 3 are connected in series in sequence, that is, the discharge port 33 of the front esterification kettle 3 is connected to the rear esterification kettle 3, each esterification kettle 3 corresponds to a condensing system, the esterification reaction is divided into multiple stages, and the ester organic substances are purified in multiple stages.
The continuous esterification process comprises the following steps:
firstly, starting a vacuum pump of a vacuum system 32, adjusting the pressure in an esterification kettle 3 to a certain value, and injecting an acid organic matter, an alcohol organic matter and a liquid catalyst into a static mixer 1 according to a certain proportion for mixing;
secondly, the mixed material formed after mixing by the static mixer 1 enters an esterification kettle 3 through a preheater 2, the preheater 2 is firstly started to preheat the mixed material, and then a heating component is started to enable the temperature in the esterification kettle 3 to reach a preset value;
thirdly, ester compounds generated in the esterification kettle 3 overflow and are discharged through a discharge hole 33 at the upper part of the esterification kettle 3.
Specifically, the esterification reaction of thioglycollic acid and isooctyl alcohol is carried out by taking concentrated sulfuric acid as a catalyst. The volume of the esterification kettle 3 is 5m3. Starting a vacuum system 32, maintaining the pressure in the esterification kettle 3 to be-0.07 MPa, starting a circulating water inlet and outlet valve of a condenser 30, feeding mercaptoacetic acid and isooctanol according to the ampere-mol ratio of 1:1.2, and feeding concentrated sulfuric acid in an amount of 3 wt% of the total amount of the mercaptoacetic acid and the isooctanol. The feeding amount of the three materials is 2.2m3H is used as the reference value. Three materials are simultaneously pumped into the static mixer 1 by a material pump, when the materials enter the esterification kettle 3, a steam valve of the preheater 2 is opened, the steam flow is adjusted, the materials flow through the preheater 2 and are preheated to 70 ℃, the materials in the esterification kettle 3 are close to an overflow port (namely a discharge port 33), a steam valve is opened on a jacket of the esterification kettle 3, the steam flow is adjusted, and the temperature of the materials in the esterification kettle 3 is maintained at 90 ℃. After the reaction is stable, the content of thioglycolic acid in the esterification solution overflowing from the discharge port 33 of the esterification kettle 3 is 0.5 wt% max, and the content of isooctyl thioglycolate is 91.4 wt%.
The present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes without creative labor from the above conception, and all the changes fall within the protection scope of the present invention.
Claims (6)
1. The utility model provides a continuous esterification reaction device, its characterized in that includes static mixer, pre-heater, the cauldron of esterifying, the static mixer entry is equipped with the feed inlet that supplies sour organic matter, alcohols organic matter and catalyst pan feeding respectively, static mixer exit linkage pre-heater, the cauldron bottom of esterifying be equipped with the feed inlet that the discharge gate of pre-heater is connected, the cauldron upper portion of esterifying is equipped with the discharge gate, the cauldron top of esterifying is equipped with the gas phase export, the gas phase exit linkage has condensing system.
2. A continuous esterification reaction apparatus as claimed in claim 1, wherein the condensing system includes a condenser, the outlet of the vapor phase of the esterification tank is connected to the inlet of the condenser, and the outlet of the condenser is connected to the receiving tank.
3. A continuous esterification reaction apparatus as claimed in claim 2, wherein the condenser is connected to a vacuum system.
4. The continuous esterification apparatus according to claim 1, wherein the tank body of the esterification tank is provided with a jacket, and the jacket is connected with a heating assembly.
5. A continuous esterification reaction apparatus according to claim 1, wherein said esterification reaction apparatus is provided with one or more esterification reactors, and a plurality of said esterification reactors are connected in series.
6. A continuous esterification reaction apparatus as claimed in claim 1, wherein said catalyst is a liquid catalyst.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921221327.6U CN211800862U (en) | 2019-07-29 | 2019-07-29 | Continuous esterification reaction device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921221327.6U CN211800862U (en) | 2019-07-29 | 2019-07-29 | Continuous esterification reaction device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110302737A (en) * | 2019-07-29 | 2019-10-08 | 潍坊益华化工有限公司 | A kind of continuous esterification device and process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110302737A (en) * | 2019-07-29 | 2019-10-08 | 潍坊益华化工有限公司 | A kind of continuous esterification device and process |
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