CN213408648U - Device for preparing pseudo ionone by continuous method - Google Patents
Device for preparing pseudo ionone by continuous method Download PDFInfo
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- CN213408648U CN213408648U CN202022126843.XU CN202022126843U CN213408648U CN 213408648 U CN213408648 U CN 213408648U CN 202022126843 U CN202022126843 U CN 202022126843U CN 213408648 U CN213408648 U CN 213408648U
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Abstract
The utility model discloses a device for preparing pseudo ionone by a continuous method. The utility model comprises a packed tower, an acetone tank, an alkaline solution tank, a citral tank, a liquid storage tank and a product tank; the outlet of the acetone tank and the outlet of the lye tank are connected with the top of the packed tower through pipelines; the outlet of the citral tank is connected with the bottom of the packed tower through a pipeline; a liquid outlet at the bottom of the packing tower is connected with a liquid storage tank through a pipeline, and water generated by reaction and unreacted acetone and alkali liquor are discharged from the liquid outlet at the bottom of the packing tower and flow into the liquid storage tank; and the upper part of the packed tower is provided with a product overflow port, the product overflow port is connected with a product tank through a pipeline, and pseudo ionone generated by the reaction flows out of the product overflow port and flows into the product tank. The utility model discloses the pseudo ionone that can effectively prevent the production further takes place the condensation with acetone, obviously improves utilization ratio of raw materials.
Description
Technical Field
The utility model belongs to a chemical synthesis device, in particular to a device for preparing pseudoionone by a continuous method.
Background
The pseudo ionone is an important intermediate in chemical industry and is widely applied to the industries of flavors, fragrances, medicines and food additives. At present, the pseudo ionone is mainly obtained by Aldol condensation of citral and acetone under the condition of strong alkali. The conventional method for preparing pseudoionone is to add citral dropwise to a mixed solution composed of acetone and aqueous sodium hydroxide solution, and the reaction vessel is usually a reaction kettle. However, the method needs a large amount of acetone, the pseudoionone cannot be separated from the alkali liquor well in the later reaction stage, and great resource waste is caused to the later treatment.
The search for an excellent method or device for preparing the pseudo ionone is a research hotspot of scholars at home and abroad. Chinese patent CN108569958A describes a method for preparing pseudo ionone by condensing citral and acetone under the catalysis of solid base, and the method has the main defect that the preparation cost of the solid base catalyst is high and the period is long.
The patent US7141698B2 (2003) describes a method for continuously synthesizing pseudoionone at 20-120 ℃ and 1-10 MPa. The method has the disadvantages that the reaction temperature and the reaction pressure are relatively high, and the practical application is difficult in the practical production.
Aiming at the problems of difficult separation, large acetone consumption and basically intermittent reaction production mode in the existing pseudo ionone synthesis, a new device is required to be searched for preparing pseudo ionone by a continuous method.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the defect that above-mentioned prior art exists, provide a device of pseudo ionone is produced to continuous process, the device can effectively prevent the pseudo ionone of production further to take place the condensation with acetone to obviously improve utilization ratio of raw materials.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a device for preparing pseudoionone by a continuous method comprises a packing tower, an acetone tank, an alkali liquor tank, a citral tank, a liquid storage tank and a product tank;
the outlet of the acetone tank and the outlet of the lye tank are connected with the top of the packed tower through pipelines;
the outlet of the citral tank is connected with the bottom of the packed tower through a pipeline;
a liquid outlet at the bottom of the packing tower is connected with a liquid storage tank through a pipeline, and water generated by reaction and unreacted acetone and alkali liquor are discharged from the liquid outlet at the bottom of the packing tower and flow into the liquid storage tank;
and the upper part of the packed tower is provided with a product overflow port, the product overflow port is connected with a product tank through a pipeline, and pseudo ionone generated by the reaction flows out of the product overflow port and flows into the product tank.
Furthermore, a first metering pump is arranged on a pipeline connecting the acetone tank and the lye tank with the top of the packed tower, and acetone discharged from the acetone tank and lye discharged from the lye tank are uniformly mixed and then are conveyed to the top of the packed tower through the first metering pump.
And further, a second metering pump is arranged on a pipeline connecting a liquid outlet at the bottom of the packing tower and the liquid storage tank.
And furthermore, a feed pump is arranged on a pipeline connecting the citral tank and the bottom of the packed tower.
Further, the filler in the packed tower is a metal filler, a ceramic filler or a plastic filler, and is preferably a ceramic filler.
Further, the tower diameter of the packed tower is 50-500mm, preferably 50-250mm, and more preferably 75-120 mm; the height is 1000-10000mm, preferably 1500-5000mm, and more preferably 1500-3000 mm.
The equipment of the utility model enables the reaction raw material citral to form liquid film acetone with the surface of the filler in the floating process due to the existence of the filler, and the alkali liquor is continuously and fully contacted, so as to generate Aldol condensation reaction; in addition, the reduction of acetone after the reaction causes the reduction of the solubility of the product in a water phase, so that the product slowly floats to the top of the tower to be aggregated and overflows out of a reaction system, thereby reducing the further condensation of the product and the acetone. Compared with the traditional kettle type equipment, the equipment obviously improves the utilization rate of raw materials and also improves the conversion rate and selectivity of the reaction.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure, 1-acetone tank, 2-lye tank, 3-first metering pump, 4-citral tank, 5-feeding pump, 6-packed tower, 7-second metering pump, 8-product tank and 9-liquid storage tank.
Detailed Description
The present invention is further described below, but the present invention is not limited thereto, and those skilled in the art of chemical engineering can make appropriate changes without departing from the scope of the present invention.
The embodiment provides a device for preparing pseudo ionone by a continuous method, which comprises a packed tower 6, an acetone tank 1, an alkali liquor tank 2, a citral tank 4, a liquid storage tank 9 and a product tank 8;
the outlet of the acetone tank 1 and the outlet of the lye tank 2 are connected with the top of the packed tower 6 through pipelines;
the outlet of the citral tank 4 is connected with the bottom of the packed tower 6 through a pipeline;
a liquid outlet at the bottom of the packed tower 6 is connected with the liquid storage tank 9 through a pipeline, and water generated by reaction and unreacted acetone and alkali liquor are discharged from the liquid outlet at the bottom of the packed tower 6 and flow into the liquid storage tank 9;
and a product overflow port is arranged at the upper part of the packed tower 6 and is connected with the product tank 8 through a pipeline, and the pseudoionone generated by the reaction flows out of the product overflow port and flows into the product tank 8.
The acetone tank 1 and the lye tank 2 are provided with a first metering pump 3 on the pipeline connected with the top of the packed tower 6, and acetone coming out of the acetone tank 1 and lye coming out of the lye tank 2 are uniformly mixed and then are conveyed to the top of the packed tower 6 through the first metering pump 3.
And a second metering pump 7 is arranged on a pipeline connecting a liquid outlet at the bottom of the packed tower 6 with the liquid storage tank 9.
And a feed pump 5 is arranged on a pipeline connecting the citral tank 4 and the bottom of the packed tower 6.
The filler in the packed tower is metal filler, ceramic filler or plastic filler.
The tower diameter of the packed tower is 50-500mm, preferably 50-250mm, and more preferably 75-120 mm; the height is 1000-10000mm, preferably 1500-5000mm, and more preferably 1500-3000 mm.
The utility model discloses a use as follows:
filling materials are added into the packed tower, citral is pumped into the bottom of the packed tower through a feeding pump, acetone and sodium hydroxide aqueous solution which are prepared in advance are pumped into the packed tower from the top end of the packed tower, the citral moves from the tower kettle to the tower top under the action of buoyancy and condenses with acetone in the moving process to generate pseudo ionone, the generated pseudo ionone overflows from the upper part of the packed tower, and generated water and unreacted acetone and alkali liquor are discharged from the bottom of the packed tower.
Claims (8)
1. A device for preparing pseudo ionone by a continuous method comprises a packed tower (6), and is characterized by further comprising an acetone tank (1), an alkali liquor tank (2), a citral tank (4), a liquid storage tank (9) and a product tank (8);
the outlet of the acetone tank (1) and the outlet of the lye tank (2) are connected with the top of the packed tower (6) through pipelines;
the outlet of the citral tank (4) is connected with the bottom of the packed tower (6) through a pipeline;
a liquid outlet at the bottom of the packed tower (6) is connected with the liquid storage tank (9) through a pipeline, and water generated by reaction and unreacted acetone and alkali liquor are discharged from the liquid outlet at the bottom of the packed tower (6) and flow into the liquid storage tank (9);
and the upper part of the packed tower (6) is provided with a product overflow port, the product overflow port is connected with a product tank through a pipeline, and pseudo ionone generated by reaction flows out of the product overflow port and flows into the product tank (8).
2. The device for preparing the pseudo ionone by the continuous process according to claim 1, wherein the pipelines of the acetone tank (1) and the lye tank (2) connected with the top of the packed tower (6) are provided with a first metering pump (3), and acetone from the acetone tank (1) and lye from the lye tank (2) are uniformly mixed and then are conveyed to the top of the packed tower (6) through the first metering pump (3).
3. The apparatus for the continuous preparation of pseudoionone according to claim 1, characterized in that the second metering pump (7) is provided in the conduit connecting the liquid outlet at the bottom of the packed tower (6) to the liquid reservoir (9).
4. The apparatus for the continuous production of pseudoionone according to claim 1, characterized in that the feed pump (5) is provided on the pipe connecting the citral tank (4) with the bottom of the packed column (6).
5. The apparatus for preparing pseudoionone by continuous process according to claim 1, wherein the packing in the packed column is metal packing, ceramic packing or plastic packing.
6. The apparatus for preparing pseudoionone by continuous process according to claim 1, wherein the diameter of the packed column is 50-500mm, and the height is 1000-10000 mm.
7. The apparatus for preparing pseudoionone by continuous process as claimed in claim 1, wherein the column diameter of the packed column is 50-250mm and the height is 1500-.
8. The apparatus for preparing pseudoionone by continuous process according to claim 1, wherein the diameter of the packed column is 75-120mm, and the height is 1500-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022126843.XU CN213408648U (en) | 2020-09-24 | 2020-09-24 | Device for preparing pseudo ionone by continuous method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022126843.XU CN213408648U (en) | 2020-09-24 | 2020-09-24 | Device for preparing pseudo ionone by continuous method |
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| Publication Number | Publication Date |
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| CN213408648U true CN213408648U (en) | 2021-06-11 |
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| CN202022126843.XU Active CN213408648U (en) | 2020-09-24 | 2020-09-24 | Device for preparing pseudo ionone by continuous method |
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- 2020-09-24 CN CN202022126843.XU patent/CN213408648U/en active Active
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