CN210700016U - Continuous esterification production device for mixed dibasic acid dimethyl ester - Google Patents
Continuous esterification production device for mixed dibasic acid dimethyl ester Download PDFInfo
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- CN210700016U CN210700016U CN201921202935.2U CN201921202935U CN210700016U CN 210700016 U CN210700016 U CN 210700016U CN 201921202935 U CN201921202935 U CN 201921202935U CN 210700016 U CN210700016 U CN 210700016U
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Abstract
The utility model discloses a continuous esterification production device of mixed dibasic acid dimethyl ester, which comprises an esterification reaction kettle, wherein the esterification reaction kettle is respectively connected with a high-level continuous feeding pipeline, a low-level continuous discharging pipeline and a low-level continuously introduced gaseous raw material pipeline, and an overflow baffle is arranged in the esterification reaction kettle; a tower section is arranged at the upper side part of the esterification reaction kettle, an air cap is arranged in the tower section, a liquid accumulating tank is arranged at the bottom of the air cap, and the condensed liquid material is independently recovered through the liquid accumulating tank at the bottom of the air cap; the esterification reaction kettle is provided with a plurality of esterification reaction kettles, a low-level continuous discharge pipeline of the previous esterification reaction kettle is used as a high-level continuous feed pipeline of the next esterification reaction kettle, and the esterification reaction kettles are sequentially connected in series. The utility model discloses a continuous esterification reaction produces mixed dibasic acid dimethyl ester, and the device is with low costs, and product quality is good, and production efficiency is high, and the DBE product purity that obtains is greater than or equal to 99.0%, has good market prospect.
Description
Technical Field
The utility model relates to a high-quality high boiling solvent apparatus for producing especially relates to a mixed dibasic acid dimethyl ester's continuous esterification apparatus for producing.
Background
The high-boiling point mixed dicarboxylic acid dimethyl ester is also called DBE, consists of three components of dimethyl succinate, dimethyl glutarate and dimethyl adipate, has high boiling point, low cost, low volatility, excellent solubility and ester fragrance, is environment-friendly, non-toxic and safe to use, and can replace solvents with high toxicity and strong odor, such as isophorone, ethylene glycol ethyl ether acetate (CAC), ethylene glycol monobutyl ether (white water prevention), propylene glycol ether ester solvents, cyclohexanone, diacetone alcohol, cresol and the like. The excellent characteristics determine that the DBE can be widely applied to the fields of coil steel coatings, baking paints, metal printing coatings, automobile coatings, wood paints, ink industry and the like, so that the DBE has good market prospect by analyzing the product performance.
The mixed dibasic acid DBA, also called nylon acid, is a byproduct in the production process of adipic acid, and its main organic components are adipic acid (ADA), Glutaric Acid (GA) and Succinic Acid (SA), and therefore is also called AGS acid. It is mainly used for producing solvent, plasticizer, raw material for producing pesticide, plant growth hormone, synthetic rubber and foamed plastics. With the rapid increase of the production energy of adipic acid in China, the use of the by-product dibasic acid in the production of adipic acid is continuously developed. As the solvent industry of the main uses of dibasic acid, the research on the production technology of DBE is also continuously advanced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the continuous esterification production device of the mixed dibasic acid dimethyl ester is low in cost and good in product quality, and the purity of the obtained DBE product is more than or equal to 99.0%.
The utility model discloses a solve technical problem and take technical scheme as follows:
a continuous esterification production device of mixed dibasic acid dimethyl ester comprises an esterification reaction kettle, wherein the esterification reaction kettle is respectively connected with a high-position continuous feeding pipeline, a low-position continuous discharging pipeline and a low-position continuously introduced gaseous raw material pipeline; a tower section is arranged at the upper side part of the esterification reaction kettle, an air cap is arranged in the tower section, a liquid accumulating tank is arranged at the bottom of the air cap, and the condensed liquid material is independently recovered through the liquid accumulating tank at the bottom of the air cap; the esterification reaction kettle is provided with a plurality of esterification reaction kettles, a low-level continuous discharge pipeline of the previous esterification reaction kettle is used as a high-level continuous feed pipeline of the next esterification reaction kettle, and the esterification reaction kettles are sequentially connected in series.
The upper part of the tower section is provided with a thermometer and a pressure gauge, and a discharging pipeline observation sight glass is arranged on the low-level continuous discharging pipeline.
The esterification reaction kettle is provided with a liquid level meter and a thermometer which are interlocked with a steam control valve, and the steam control valve is arranged on a steam conveying pipeline.
The bottom of the esterification reaction kettle is connected with a kettle bottom discharge pipeline and a dredging valve for preventing bottom blockage, and a stirring device is arranged in the esterification reaction kettle.
The height of the overflow baffle is 30-95% of the height of the esterification reaction kettle.
The utility model discloses a continuous esterification reaction produces mixed dibasic acid dimethyl ester, and the working process is as follows:
1. continuously feeding DBA materials into the series esterification reaction kettle through a high-level continuous feeding pipeline, simultaneously adding a catalyst, and continuously introducing methanol respectively for stirring to carry out the reaction;
2. an overflow baffle is arranged in front of the low-level continuous discharge pipeline to ensure that the materials in the reaction kettle fully stay for reaction time, and a discharge pipeline observation sight glass is arranged on the low-level continuous discharge pipeline;
3. the temperature in the esterification reaction kettle is controlled to be 60-200 ℃, and the temperature at the top of the tower is controlled to be 60-100 ℃;
4. water and methanol mixture produced during the esterification reaction: a wind cap type structure is adopted in the tower section, the condensed liquid product is independently recovered through a liquid accumulating tank at the bottom of the wind cap, and the mixture of water and methanol enters a methanol recovery tower to reuse the methanol again;
5. a stirring device is arranged in the reaction kettle, a liquid level meter and a thermometer are arranged in the reaction kettle, and the thermometer and a steam control valve are interlocked to control the reaction temperature;
6. the bottom of the esterification reaction kettle is connected with a kettle bottom outlet pipeline and a dredging valve for preventing the bottom from being blocked.
The utility model discloses apparatus for producing adopts continuous esterification reaction to produce mixed dibasic acid dimethyl ester, and the device is with low costs, and product quality is good, and production efficiency is high, and the DBE product purity that obtains is greater than or equal to 99.0%, has good market prospect.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
The specific implementation mode is as follows:
the invention will be further explained and explained with reference to the drawings, in which:
referring to fig. 1, a continuous esterification production device of mixed dibasic acid dimethyl ester comprises an esterification reaction kettle 1, wherein the esterification reaction kettle 1 is respectively connected with a high-position continuous feeding pipeline 2, a low-position continuous discharging pipeline 3 and a low-position continuously introduced gaseous raw material pipeline 4, an overflow baffle 6 is arranged in the esterification reaction kettle 1, the inlet end of the low-position continuous discharging pipeline 3 is higher than the bottom of the overflow baffle 6, and the discharging end of the high-position continuous feeding pipeline 2 is lower than the top of the overflow baffle 6; a tower section 7 is arranged at the upper side part of the esterification reaction kettle 1, an air cap 8 is arranged inside the tower section 7, a liquid accumulating tank 18 is arranged at the bottom of the air cap, and the condensed liquid material is independently recovered through the liquid accumulating tank at the bottom of the air cap; the esterification reaction kettles 1 are multiple, the low-level continuous discharge pipeline of the previous esterification reaction kettle is used as the high-level continuous feed pipeline of the next esterification reaction kettle, and the multiple esterification reaction kettles are sequentially connected in series.
A thermometer 9 and a pressure gauge 10 are arranged on the upper part of the tower section 7, and a discharging pipeline observation sight glass 5 is arranged on the low-level continuous discharging pipeline 3.
A liquid level meter 14 and a thermometer 15 are arranged on the esterification reaction kettle 1, the thermometer 15 and a steam control valve 16 are interlocked, and the steam control valve 16 is arranged on a steam conveying pipeline 17.
The bottom of the esterification reaction kettle 1 is connected with a kettle bottom discharge pipeline 11 and a dredging valve 12 for preventing bottom blockage, and the esterification reaction kettle 1 is internally provided with a stirring device 13.
Wherein: the height of the overflow baffle 6 is 30-95% of the height of the esterification reaction kettle 1.
The utility model discloses a continuous esterification reaction produces mixed dibasic acid dimethyl ester, and the device is with low costs, and product quality is good, and production efficiency is high, and the DBE product purity that obtains is greater than or equal to 99.0%, has good market prospect.
Claims (5)
1. The utility model provides a continuous esterification apparatus for producing of mixed dibasic acid dimethyl ester, includes esterification reaction cauldron (1), its characterized in that: the esterification reaction kettle (1) is respectively connected with a high-position continuous feeding pipeline (2), a low-position continuous discharging pipeline (3) and a low-position continuously introduced gaseous raw material pipeline (4), an overflow baffle (6) is arranged in the esterification reaction kettle (1), the inlet end of the low-position continuous discharging pipeline (3) is higher than the bottom of the overflow baffle (6), and the discharging end of the high-position continuous feeding pipeline (2) is lower than the top of the overflow baffle (6); a tower section (7) is arranged at the upper side part of the esterification reaction kettle (1), an air cap (8) is arranged inside the tower section (7), a liquid accumulating tank (18) is arranged at the bottom of the air cap, and the condensed liquid material is independently recovered through the liquid accumulating tank at the bottom of the air cap; the esterification reaction kettles (1) are multiple, the low-level continuous discharge pipeline of the previous esterification reaction kettle is used as the high-level continuous feed pipeline of the next esterification reaction kettle, and the multiple esterification reaction kettles are sequentially connected in series.
2. The continuous esterification production apparatus of mixed dibasic acid dimethyl ester according to claim 1, characterized in that: a tower section thermometer (9) and a tower section pressure gauge (10) are arranged on the upper part of the tower section (7), and a discharging pipeline observation sight glass (5) is arranged on the low-level continuous discharging pipeline (3).
3. The continuous esterification production apparatus of mixed dibasic acid dimethyl ester according to claim 1, characterized in that: an esterification reaction kettle liquid level meter (14) and an esterification reaction kettle thermometer (15) are arranged on the esterification reaction kettle (1), the esterification reaction kettle thermometer (15) is interlocked with a steam control valve (16), and the steam control valve (16) is arranged on a steam conveying pipeline (17).
4. The continuous esterification production apparatus of mixed dibasic acid dimethyl ester according to claim 1, characterized in that: esterification reaction cauldron (1) bottom is connected with cauldron bottom discharge line (11) and prevents mediation valve (12) that the bottom blockked up, at esterification reaction cauldron (1) internally mounted have agitating unit (13).
5. The continuous esterification production apparatus of mixed dibasic acid dimethyl ester according to claim 1, characterized in that: the height of the overflow baffle (6) is 30-95% of the height of the esterification reaction kettle (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921202935.2U CN210700016U (en) | 2019-07-29 | 2019-07-29 | Continuous esterification production device for mixed dibasic acid dimethyl ester |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921202935.2U CN210700016U (en) | 2019-07-29 | 2019-07-29 | Continuous esterification production device for mixed dibasic acid dimethyl ester |
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| CN210700016U true CN210700016U (en) | 2020-06-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110252212A (en) * | 2019-07-29 | 2019-09-20 | 河南久圣化工有限公司 | A kind of continuous esterification process units of mixed dibasic acid dimethyl ester |
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2019
- 2019-07-29 CN CN201921202935.2U patent/CN210700016U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110252212A (en) * | 2019-07-29 | 2019-09-20 | 河南久圣化工有限公司 | A kind of continuous esterification process units of mixed dibasic acid dimethyl ester |
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