CN220111014U - Acyl chloride pressurization reaction device - Google Patents
Acyl chloride pressurization reaction device Download PDFInfo
- Publication number
- CN220111014U CN220111014U CN202320740922.0U CN202320740922U CN220111014U CN 220111014 U CN220111014 U CN 220111014U CN 202320740922 U CN202320740922 U CN 202320740922U CN 220111014 U CN220111014 U CN 220111014U
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- CN
- China
- Prior art keywords
- reaction kettle
- outlet pipe
- condenser
- reaction
- pressure
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 56
- 150000001263 acyl chlorides Chemical class 0.000 title claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000005260 corrosion Methods 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 3
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 claims 2
- 239000000463 material Substances 0.000 abstract description 10
- 239000007789 gas Substances 0.000 description 14
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 9
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 5
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000009835 boiling Methods 0.000 description 3
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- XEMRAKSQROQPBR-UHFFFAOYSA-N (trichloromethyl)benzene Chemical compound ClC(Cl)(Cl)C1=CC=CC=C1 XEMRAKSQROQPBR-UHFFFAOYSA-N 0.000 description 1
- 239000005711 Benzoic acid Substances 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The acyl chloride pressurizing reaction device comprises a reaction kettle, wherein an outer liner is arranged outside the reaction kettle, and a heating area is formed between the outer liner and the reaction kettle; the upper end of the reaction kettle is provided with a feed inlet, an air outlet pipe and a pressure gauge, wherein the air outlet pipe is provided with a condenser and an automatic control valve, the condenser is connected with the water absorbing device through a tail gas outlet pipe, and the automatic control valve and the pressure gauge are in joint control to regulate the pressure of the reaction kettle. The acyl chloride pressurizing reaction device provided by the utility model can reduce material loss.
Description
Technical Field
The utility model relates to a preparation device of an acyl chloride product, in particular to a pressurizing reaction device of acyl chloride.
Background
The acyl chloride is colorless transparent liquid and is used as intermediate for medicine and pesticide, and the reaction kettle has condenser and gas phase exhaust pipe. A large amount of hydrogen chloride gas is generated in the reaction, and because the boiling point of the material in the negative pressure state is low, a large amount of material is easy to evaporate and is discharged along with tail gas hydrogen chloride, on one hand, the tail gas absorption operation is complicated, and more operation cost is consumed; on the other hand, raw materials are wasted. In addition, because the end plate of the condenser and the shell are welded and fixed, and corrosive gas hydrogen chloride exists in the chemical reaction, the welded part is corroded for a long time, and liquid leakage is caused.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide the acyl chloride pressurizing reaction device, which increases the boiling point of materials through pressurization, greatly reduces the discharge amount of the materials along with gas and reduces the material loss; the automatic control valve is added, the whole-course automatic control of the pressure and the temperature of the reaction kettle is designed, the operation of personnel is reduced, and the production safety index is improved.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the acyl chloride pressurizing reaction device comprises a reaction kettle, wherein an outer liner is arranged outside the reaction kettle, and a heating area is formed between the outer liner and the reaction kettle; the upper end of the reaction kettle is provided with a feed inlet, an air outlet pipe and a pressure gauge, wherein the air outlet pipe is provided with a condenser and an automatic control valve, the condenser is connected with the water absorbing device through a tail gas outlet pipe, and the automatic control valve and the pressure gauge are in joint control to regulate the pressure of the reaction kettle.
The heating area is provided with a steam inlet pipe and a steam outlet pipe.
A backing plate is clamped between the end plate and the end cover of the condenser, and the surfaces of the backing plate and the end plate are coated with anti-corrosion layers.
The acyl chloride pressurizing reaction device has the following technical effects:
1) The pressure treatment is carried out, and the pressure in the reaction kettle is controlled below 0.3MPa by utilizing the self-control valve, so that the boiling point of materials in the reaction is increased, the overflow amount of the materials along with hydrogen chloride is reduced, the acyl chloride crude product is fully reacted, the full reaction of the materials is ensured, the tail gas treatment is simplified, and the cost is reduced.
2) The backing plate is clamped between the end plate and the end cover of the condenser, so that the welding part of the end plate and the shell of the condenser can be shielded after the backing plate is compressed, and corrosive substances entering the condenser are prevented from directly contacting the welding part; meanwhile, corrosion can be further avoided by spraying anti-corrosion layers on the backing plate and the end plate, so that maintenance is reduced, and the service life of the condenser is prolonged.
Drawings
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
fig. 1 is a schematic structural view of the present utility model.
FIG. 2 is a cross-sectional view of a condenser in accordance with the present utility model.
Fig. 3 is an enlarged partial schematic view at a in fig. 2.
In the figure: the reaction kettle 1, an outer lining 2, a heating zone 3, a feed inlet 4, an air outlet pipe 5, a pressure gauge 6, a condenser 7, an automatic control valve 8, a tail gas outlet pipe 9, a steam inlet pipe 10, a steam outlet pipe 11, a thermometer 12, end plates 7.1, end covers 7.2 and backing plates 7.3.
Detailed Description
As shown in figure 1, the acyl chloride pressurizing reaction device comprises a reaction kettle 1, an outer liner 2 is arranged outside the reaction kettle 1, a heating zone 3 is formed between the outer liner 2 and the reaction kettle 1, a steam inlet pipe 10 and a steam outlet pipe 11 are arranged on the heating zone 3, steam can be introduced to heat the reaction kettle 1, the reaction speed is improved, and the heating highest temperature is controlled within 120-130 ℃. And the upper end of the reaction kettle 1 is provided with a plurality of groups of feed inlets 4, and the feed inlets 4 are used for adding raw materials. The pressure gauge 6 and the thermometer 12 are arranged at the proper position of the upper end of the reaction kettle 1, the pressure gauge 6 monitors the pressure of the reaction kettle 1, and the thermometer 12 monitors the temperature of the reaction kettle 1. In addition, a condenser 7 and an automatic control valve 8 are arranged on an air outlet pipe 5 at the upper end of the reaction kettle 1, and the condenser 7 can condense the raw materials evaporated in the reaction process so as to return to the reaction kettle 1. And the self-control valve 8 is used for starting automatic pressure relief when the pressure in the reaction kettle 1 reaches the set pressure, and closing the self-control valve 8 when the pressure is lower than the set pressure, so that the reaction kettle is stably reacted under a certain pressure. The tail gas (hydrogen chloride) after the reaction can be discharged through a tail gas outlet pipe 9 and enter a water absorption device to be absorbed by water to prepare hydrochloric acid.
As shown in FIGS. 2 to 3, a represents a cooling liquid inlet, b represents a cooling liquid outlet, c represents a raw material inlet in the reaction, and d represents a raw material outlet in the reaction. The main body part of the condenser 7 in the utility model is the same as the existing condenser, and comprises a cylinder shell, wherein end plates 7.1 are welded at two ends of the cylinder shell, holes are formed in the upper end plate 7.1 and the lower end plate 7.1, a plurality of groups of flow pipes are arranged, end covers 7.2 are arranged outside the end plates 7.1, and the end covers 7.2 are locked through hinged bolts. In order to avoid corrosion of the welded joint of the end plate 7.1 and the housing, an annular mounting groove can be provided in the end cap 7.2, in which groove the backing plate 7.3 is placed. The shim plate 7.3 is compressed between the end plate 7.1 and the end cap 7.2. Meanwhile, the surfaces of the backing plates 7.3 and the surfaces of the end plates 7.1 are coated with anti-corrosion layers. The anticorrosive layer may be PO powder.
Working principle and process:
1) Putting the trichlorotoluene, the benzoic acid and the catalyst into the reaction kettle 1 according to a certain proportion, sealing the feed inlet 4, starting a motor of the reaction kettle 1, and stirring by a stirring paddle.
2) And the steam is introduced through the steam inlet pipe 10 to slowly heat the reaction kettle, the temperature reaches 60 ℃, the reaction starts, the temperature is continuously and slowly raised, the temperature is kept to be uniformly raised, the pressure is gradually raised in the material reaction process, the pressure in the reaction kettle is controlled to be below 0.3MPa by the self-control valve 8, and the self-control valve 8 is opened to start exhausting after the pressure reaches the set value.
3) And controlling the temperature in the final reaction kettle to be 120-130 ℃, condensing tail gas, absorbing the tail gas by water to prepare hydrochloric acid, and sampling and analyzing after the tail gas is reacted to the end point, wherein the product is qualified.
Claims (3)
1. An acyl chloride pressurized reaction device is characterized in that: comprises a reaction kettle (1), an outer liner (2) is arranged outside the reaction kettle (1), and a heating zone (3) is formed between the outer liner (2) and the reaction kettle (1); the reactor is characterized in that a feed inlet (4), an air outlet pipe (5) and a pressure gauge (6) are arranged at the upper end of the reactor (1), wherein a condenser (7) and an automatic control valve (8) are arranged on the air outlet pipe (5), the condenser (7) is connected with a water absorption device through a tail gas outlet pipe (9), and the automatic control valve (8) and the pressure gauge (6) are connected to control the pressure of the reactor (1).
2. The acid chloride pressure reaction device according to claim 1, wherein: the heating zone (3) is provided with a steam inlet pipe (10) and a steam outlet pipe (11).
3. The acid chloride pressure reaction device according to claim 1, wherein: a base plate (7.3) is clamped between an end plate (7.1) and an end cover (7.2) of the condenser (7), and anti-corrosion layers are coated on the surfaces of the base plate (7.3) and the end plate (7.1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320740922.0U CN220111014U (en) | 2023-04-06 | 2023-04-06 | Acyl chloride pressurization reaction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320740922.0U CN220111014U (en) | 2023-04-06 | 2023-04-06 | Acyl chloride pressurization reaction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220111014U true CN220111014U (en) | 2023-12-01 |
Family
ID=88895437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320740922.0U Active CN220111014U (en) | 2023-04-06 | 2023-04-06 | Acyl chloride pressurization reaction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220111014U (en) |
-
2023
- 2023-04-06 CN CN202320740922.0U patent/CN220111014U/en active Active
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