CN215403951U - Device for improving mixing degree of esterification reaction raw materials - Google Patents
Device for improving mixing degree of esterification reaction raw materials Download PDFInfo
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- CN215403951U CN215403951U CN202121401779.XU CN202121401779U CN215403951U CN 215403951 U CN215403951 U CN 215403951U CN 202121401779 U CN202121401779 U CN 202121401779U CN 215403951 U CN215403951 U CN 215403951U
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Abstract
The utility model relates to a device for improving the mixing degree of esterification reaction raw materials. The technical scheme is as follows: propylene carbonate storage tank, methyl alcohol storage tank, sodium methoxide catalyst jar are connected to respectively in mixing the buffer tank, the output of mixing the buffer tank is connected to the middle part of reaction rectifying column through first static mixer, reaction rectifying column top is through pipe connection to azeotrope separator, azeotrope separator's output is through pipe connection to rectifying column, the output of rectifying column is through pipe connection to the product jar. The beneficial effects are that: according to the utility model, the raw material mixing device is arranged at the front section of the reaction rectifying tower, and the propylene carbonate, the methanol and the sodium methoxide are uniformly mixed in proportion, so that the conversion rate of the dimethyl carbonate is improved; in addition, the adopted raw material mixing device is more than one group of static mixers, so that uniform and continuous mixing can be ensured, long-time circulation is not required to be carried out independently, and the reaction efficiency is improved.
Description
Technical Field
The utility model relates to the technical field of esterification reaction synthesis, in particular to a device for improving the mixing degree of esterification reaction raw materials.
Background
Dimethyl carbonate is a good methylating agent, hydroxylating agent, hydroxymethylating agent and methoxylating agent, can be used in the industries of paint, coating, cleaning agent, additive, pharmacy and the like, can be used as an excellent medium of a lithium battery in the battery industry, and is called as a green and non-toxic chemical product in the 21 st century. In the dimethyl carbonate synthesis process, propylene carbonate and methanol are subjected to ester exchange reaction under the action of a sodium methoxide catalyst, and the metered propylene carbonate, methanol and sodium methoxide are mixed and enter a mixing tank for reaction to generate dimethyl carbonate and 1, 2-propylene glycol. However, in the industrial production process, because the propylene carbonate and the methanol are not completely mixed, the propylene carbonate and part of sodium methoxide in the mixing tank react to inactivate part of sodium methoxide catalyst, which is not beneficial to the synthesis of dimethyl carbonate.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a device for improving the mixing degree of raw materials for esterification reaction, which can improve the mixing degree of the three raw materials, thereby improving the conversion rate of dimethyl carbonate.
The utility model provides a device for improving the mixing degree of esterification reaction raw materials, which adopts the technical scheme that: including propylene carbonate storage tank 7, methyl alcohol storage tank 8, sodium methoxide catalyst jar 9, mix buffer tank 1, first static mixer 2, reaction rectifying column 3, azeotrope separator 4, rectifying column 5, product jar 6, propylene carbonate storage tank 7, methyl alcohol storage tank 8, sodium methoxide catalyst jar 9 be connected to respectively in mixing buffer tank 1, the output of mixing buffer tank 1 is connected to the middle part of reaction rectifying column 3 through first static mixer 2, 3 tops of reaction rectifying column are passed through the pipe connection to azeotrope separator 4, the output of azeotrope separator 4 passes through the pipe connection to rectifying column 5, the output of rectifying column 5 passes through the pipe connection to product jar 6.
Preferably, the first static mixer 2 includes a flange 2.1, a mixer housing 2.2, a left spiral blade 2.3, and a right spiral blade 2.4, the mixer housing 2.2 is a cylindrical structure, the flanges 2.1 are respectively disposed at two ends of the mixer housing 2.2, and a plurality of left spiral blades 2.3 and a plurality of right spiral blades 2.4 are sequentially installed in the inner cavity of the mixer housing 2.2 in a staggered manner.
Preferably, the first static mixer 2 is provided in at least one set.
Preferably, the azeotrope separation device 4 adopts a molecular sieve membrane separator.
The utility model provides a device for improving the mixing degree of esterification reaction raw materials, which adopts the technical scheme that: the device comprises a propylene carbonate storage tank 7, a methanol storage tank 8, a sodium methoxide catalyst tank 9, a mixed buffer tank 1, a reactive distillation tower 3, an azeotrope separation device 4, a distillation tower 5, a product tank 6 and a second static mixer 10, wherein the output end of the propylene carbonate storage tank 7 is connected to the mixed buffer tank 1 through the second static mixer 10, and the methanol storage tank 8 is connected to the side inlet of the second static mixer 10; mix buffer tank 1 and be connected to reaction rectifying column 3 through second static mixer 10, sodium methoxide catalyst jar 9 is connected at the side import of second static mixer 10, 3 tops of reaction rectifying column are through pipe connection to azeotrope separator 4, the output of azeotrope separator 4 is through pipe connection to rectifying column 5, the output of rectifying column 5 is through pipe connection to product jar 6.
Preferably, the second static mixer 10 is provided with a side inlet 10.1 at an upper side of one end.
The utility model has the beneficial effects that: according to the utility model, the raw material mixing device is arranged at the front section of the reaction rectifying tower, and the propylene carbonate, the methanol and the sodium methoxide are uniformly mixed in proportion, so that the conversion rate of the dimethyl carbonate is improved; in addition, the adopted raw material mixing device is more than one group of static mixers, so that uniform and continuous mixing can be ensured, long-time circulation is not required, the reaction efficiency is improved, and the subsequent conversion rate of dimethyl carbonate is facilitated.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of example 1 of the static mixer;
FIG. 3 is a schematic structural view of embodiment 2 of the present invention;
FIG. 4 is a schematic structural view of example 2 of the two-stage static mixer;
in the upper diagram: mix buffer tank 1, first static mixer 2, reaction rectifying column 3, azeotrope separator 4, rectifying column 5, product jar 6, propylene carbonate storage tank 7, methyl alcohol storage tank 8, sodium methoxide catalyst jar 9, second static mixer 10, flange 2.1, mixer casing 2.2, left helical blade 2.3, right helical blade 2.4, side import 10.1.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Wherein, first static mixer 2 includes flange 2.1, blender casing 2.2, left helical blade 2.3, right helical blade 2.4, blender casing 2.2 is the cylindrical structure, is equipped with flange 2.1 respectively at the both ends of blender casing 2.2, staggers the installation multiunit left helical blade 2.3 and multiunit right helical blade 2.4 in proper order in the inner chamber of blender casing 2.2.
Above-mentioned first static mixer 2 is provided with more than a set of, can set up multiunit first static mixer 2 according to the condition, can make the more even of raw materials mixture.
Preferably, the azeotrope separation device 4 adopts a molecular sieve membrane separator, and the molecular sieve membrane separator is used for separation to obtain the crude products of methanol and dimethyl carbonate, so that the subsequent continuous treatment is facilitated.
The using process of the utility model is as follows: propylene carbonate storage tank 7, methyl alcohol storage tank 8, sodium methoxide catalyst jar 9 is connected to mixed buffer tank respectively, can send propylene carbonate, methyl alcohol and sodium methoxide catalyst into mixed buffer tank in proportion like this, then, the rethread is the mixed back of first static mixer, send into the reaction rectifying column, the output of reaction rectifying column passes through azeotrope separator 4, obtain the dimethyl carbonate crude, send into the rectifying column 5 with the dimethyl carbonate crude and continue the rectification, the final product is sent into product jar 6.
According to the utility model, the raw material mixing device is arranged at the front section of the reaction rectifying tower, and the propylene carbonate, the methanol and the sodium methoxide are uniformly mixed in proportion, so that the conversion rate of the dimethyl carbonate is improved; in addition, the adopted raw material mixing device is more than one group of static mixers, so that uniform and continuous mixing can be ensured, long-time circulation is not required, the reaction efficiency is improved, and the subsequent conversion rate of dimethyl carbonate is facilitated.
Example 2, referring to fig. 3 and 4, the utility model provides an apparatus for improving the mixing degree of esterification reaction raw materials, which adopts the following technical scheme: the device comprises a propylene carbonate storage tank 7, a methanol storage tank 8, a sodium methoxide catalyst tank 9, a mixed buffer tank 1, a reactive distillation tower 3, an azeotrope separation device 4, a distillation tower 5, a product tank 6 and a second static mixer 10, wherein the output end of the propylene carbonate storage tank 7 is connected to the mixed buffer tank 1 through the second static mixer 10, and the methanol storage tank 8 is connected to the side inlet of the second static mixer 10; mix buffer tank 1 and be connected to reaction rectifying column 3 through second static mixer 10, sodium methoxide catalyst jar 9 is connected at the side import of second static mixer 10, 3 tops of reaction rectifying column are through pipe connection to azeotrope separator 4, the output of azeotrope separator 4 is through pipe connection to rectifying column 5, the output of rectifying column 5 is through pipe connection to product jar 6.
Preferably, the second static mixer 10 is provided with a side inlet 10.1 at an upper side of one end.
The using process of the utility model is as follows: the propylene carbonate storage tank 7 and the methanol storage tank 8 are fed into a mixing buffer tank through a second static mixer for first mixing; and then catalyst sodium methoxide enters through a side inlet of the second static mixer and is continuously mixed, then the mixture is sent into a reaction rectifying tower, the output end of the reaction rectifying tower passes through an azeotrope separation device 4 to obtain a dimethyl carbonate crude product, the dimethyl carbonate crude product is sent into a rectifying tower 5 to be continuously rectified, and finally the product is sent into a product tank 6.
The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solution described above. Therefore, any simple modifications or equivalent changes made according to the technical solution of the present invention shall fall within the scope of the present invention as claimed.
Claims (6)
1. The utility model provides an improve device of esterification reaction raw materials mixing degree which characterized by: comprises a propylene carbonate storage tank (7), a methanol storage tank (8), a sodium methoxide catalyst tank (9), a mixed buffer tank (1), a first static mixer (2), a reaction rectifying tower (3), an azeotrope separation device (4), a rectifying tower (5) and a product tank (6), the propylene carbonate storage tank (7), the methanol storage tank (8) and the sodium methoxide catalyst tank (9) are respectively connected into the mixing buffer tank (1), the output end of the mixing buffer tank (1) is connected to the middle part of the reaction rectifying tower (3) through a first static mixer (2), the top of the reactive distillation column (3) is connected to an azeotrope separation device (4) through a pipeline, the output end of the azeotrope separation device (4) is connected to a rectifying tower (5) through a pipeline, the output end of the rectifying tower (5) is connected to a product tank (6) through a pipeline.
2. The apparatus of claim 1, wherein the mixing ratio of the esterification reaction raw materials is increased by: first static mixer (2) include flange (2.1), mixer casing (2.2), left side flight (2.3), right side flight (2.4), mixer casing (2.2) are the cylindrical structure, are equipped with flange (2.1) respectively at the both ends of mixer casing (2.2), stagger in proper order at the inner chamber of mixer casing (2.2) and install multiunit left side flight (2.3) and multiunit right side flight (2.4).
3. The apparatus of claim 1 or 2, wherein the mixing degree of the raw materials for the esterification reaction is increased by: the first static mixer (2) is provided with more than one group.
4. The apparatus of claim 1, wherein the mixing ratio of the esterification reaction raw materials is increased by: the azeotrope separation device (4) adopts a molecular sieve membrane separator.
5. The utility model provides an improve device of esterification reaction raw materials mixing degree which characterized by: the device comprises a propylene carbonate storage tank (7), a methanol storage tank (8), a sodium methoxide catalyst tank (9), a mixed buffer tank (1), a reaction rectifying tower (3), an azeotrope separation device (4), a rectifying tower (5), a product tank (6) and a second static mixer (10), wherein the output end of the propylene carbonate storage tank (7) is connected to the mixed buffer tank (1) through the second static mixer (10), and the methanol storage tank (8) is connected to a side inlet of the second static mixer (10); mix buffer tank (1) and be connected to reaction rectifying column (3) through second static mixer (10), the side import at second static mixer (10) is connected in sodium methoxide catalyst jar (9), reaction rectifying column (3) top is through pipe connection to azeotrope separator (4), the output of azeotrope separator (4) passes through pipe connection to rectifying column (5), the output of rectifying column (5) passes through pipe connection to product jar (6).
6. The apparatus of claim 5, wherein the mixing ratio of the esterification reaction raw materials is increased by: the upper side of one end of the second static mixer (10) is provided with a side inlet (10.1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121401779.XU CN215403951U (en) | 2021-06-23 | 2021-06-23 | Device for improving mixing degree of esterification reaction raw materials |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121401779.XU CN215403951U (en) | 2021-06-23 | 2021-06-23 | Device for improving mixing degree of esterification reaction raw materials |
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| CN215403951U true CN215403951U (en) | 2022-01-04 |
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| CN202121401779.XU Active CN215403951U (en) | 2021-06-23 | 2021-06-23 | Device for improving mixing degree of esterification reaction raw materials |
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2021
- 2021-06-23 CN CN202121401779.XU patent/CN215403951U/en active Active
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Address after: 198 Tongxing Road, Kenli District, Dongying City, Shandong Province Patentee after: Shenghua new energy technology (Dongying) Co.,Ltd. Patentee after: Shenghua New Material Group Co.,Ltd. Address before: 257500 Building 5, Houli village, Yong'an Town, Kenli District, Dongying City, Shandong Province Patentee before: Shenghua new energy technology (Dongying) Co.,Ltd. Patentee before: SHANDONG SHIDA SHENGHUA CHEMICAL GROUP Co.,Ltd. |