CN220004053U - Dimethylamine hydrochloride production system - Google Patents
Dimethylamine hydrochloride production system Download PDFInfo
- Publication number
- CN220004053U CN220004053U CN202321326479.9U CN202321326479U CN220004053U CN 220004053 U CN220004053 U CN 220004053U CN 202321326479 U CN202321326479 U CN 202321326479U CN 220004053 U CN220004053 U CN 220004053U
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- CN
- China
- Prior art keywords
- dimethylamine hydrochloride
- adsorption tower
- reaction kettle
- filler adsorption
- production system
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- XHFGWHUWQXTGAT-UHFFFAOYSA-N dimethylamine hydrochloride Natural products CNC(C)C XHFGWHUWQXTGAT-UHFFFAOYSA-N 0.000 title claims abstract description 79
- IQDGSYLLQPDQDV-UHFFFAOYSA-N dimethylazanium;chloride Chemical compound Cl.CNC IQDGSYLLQPDQDV-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 99
- 238000006243 chemical reaction Methods 0.000 claims abstract description 74
- 238000001179 sorption measurement Methods 0.000 claims abstract description 64
- 239000000945 filler Substances 0.000 claims abstract description 60
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 39
- 238000007599 discharging Methods 0.000 claims description 19
- 238000005406 washing Methods 0.000 claims description 19
- 238000004821 distillation Methods 0.000 claims description 18
- 238000003860 storage Methods 0.000 claims description 18
- 239000007792 gaseous phase Substances 0.000 claims description 15
- 239000007791 liquid phase Substances 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 14
- 238000007670 refining Methods 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 10
- 238000011084 recovery Methods 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 4
- 239000012071 phase Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 abstract description 6
- 238000005507 spraying Methods 0.000 abstract description 4
- 125000004122 cyclic group Chemical group 0.000 abstract description 3
- 235000011194 food seasoning agent Nutrition 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 19
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000021736 acetylation Effects 0.000 description 1
- 238000006640 acetylation reaction Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
According to the dimethylamine hydrochloride production system, dimethylamine is conveyed to a first-stage filler adsorption tower through a dimethylamine feed pipe and a hydrochloric acid feed pipe, hydrochloric acid is conveyed to a third-stage filler adsorption tower through a hydrochloric acid feed pipe in a spraying mode, dimethylamine and hydrochloric acid are subjected to cyclic reaction in the third-stage seasoning adsorption tower, and dimethylamine hydrochloride solution is obtained after full absorption. The concentration can be uniformly absorbed through the three-level filler adsorption tower, dimethylamine is completely absorbed, waste is avoided, and raw materials are saved.
Description
Technical Field
The utility model relates to the technical field of chemical production, in particular to a dimethylamine hydrochloride production system.
Background
Dimethylamine hydrochloride, also known as dimethylamine hydrochloride, aminodimethane hydrochloride, is a volatile, deliquescent, readily water-soluble, ethanol-and chloroform-soluble, practically insoluble in diethyl ether, irritating chemical substance; dimethylamine hydrochloride is a raw material for organic synthesis, can be used as a catalyst and a magnesium reagent for preparation and acetylation analysis of dimethylamine aqueous solution, has strong oxidation removal capability, is easy to absorb moisture, short-circuit and has strong corrosiveness, and is commonly used for cleaning type soldering flux.
The existing production method of dimethylamine hydrochloride mainly comprises the steps of slowly dripping hydrochloric acid into dimethylamine, wherein the dripping speed is limited by pH=7-8 at the temperature of not more than 10-15 ℃, adding active carbon for decoloring after the reaction is finished, regulating the pH of filtrate to pH=2-4 by using hydrochloric acid, and decompressing and steaming until the filtrate is completely dehydrated to obtain the dimethylamine hydrochloride.
In the prior art, the Chinese utility model with publication number of CN103553927A discloses a preparation method of dimethylamine hydrochloride, which comprises the steps of heating quantitative dimethylamine aqueous solution, carrying out reaction by two packed towers filled with quantitative hydrochloric acid for spraying to generate dimethylamine hydrochloride solution, distilling the prepared dimethylamine hydrochloride solution to remove 50% of water, cooling to 30 ℃, centrifuging, decompressing and drying to obtain white and non-caking dimethylamine hydrochloride crystals. But dimethylamine is continuously absorbed by two packed towers, so that the absorption concentration of the first-stage packed tower is high, the absorption concentration of the second-stage packed tower is low, the absorption concentration of the packed tower is uneven, dimethylamine can not be completely absorbed, and raw materials are lost.
Disclosure of Invention
Based on the above, the utility model provides a dimethylamine hydrochloride production system, which aims to solve the technical problems that in the prior art, the absorption concentration of a packed tower is uneven, dimethylamine cannot be completely absorbed, and raw materials are lost.
The technical scheme for solving the technical problems is as follows:
a dimethylamine hydrochloride production system, comprising:
dimethylamine hydrochloride reaction unit, dimethylamine hydrochloride reaction unit includes one-level filler adsorption tower, second grade filler adsorption tower, tertiary filler adsorption tower, one-level filler adsorption tower gaseous phase feed end is provided with dimethylamine inlet pipe, one-level filler adsorption tower gaseous phase discharge end is connected second grade filler adsorption tower gaseous phase feed end, second grade filler adsorption tower gaseous phase discharge end is connected tertiary filler adsorption tower gaseous phase feed end, tertiary filler adsorption tower liquid phase feed end is provided with the hydrochloric acid inlet pipe, tertiary filler adsorption tower liquid phase discharge end is connected second grade filler adsorption tower liquid phase feed end, second grade filler adsorption liquid phase tower discharge end is connected one-level filler adsorption tower liquid phase feed end, one-level filler adsorption tower bottom is provided with the hydrochloride solution extraction pipe, the filler adsorption tower is provided with the shower nozzle.
Preferably, the dimethylamine hydrochloride reaction device further comprises a water washing reaction kettle, wherein the top feeding end of the water washing reaction kettle is connected with the gas phase discharging end of the three-level filler adsorption tower, and the water washing reaction kettle is provided with a tail gas discharging pipe.
Preferably, the dimethylamine hydrochloride production system comprises a dimethylamine hydrochloride refining device, wherein the dimethylamine hydrochloride refining device comprises a distillation reaction kettle, and the feeding end of the distillation reaction kettle is connected with the hydrochloride solution extraction pipe.
Preferably, the dimethylamine hydrochloride refining device further comprises a cooling reaction kettle, and the feeding end of the cooling reaction kettle is connected with the discharging end of the distillation reaction kettle.
Preferably, the dimethylamine hydrochloride refining device further comprises a drying reaction kettle, and the feeding end of the drying reaction kettle is connected with the discharging end of the cooling reaction kettle.
Preferably, the dimethylamine hydrochloride production system further comprises a dimethylamine hydrochloride recovery device, wherein the dimethylamine hydrochloride recovery device comprises a water storage tank, and the bottom discharge end of the water storage tank is connected with the feeding end of the water washing reaction kettle.
Preferably, the material ejection end of the distillation reaction kettle is connected with the material feeding end of the kettle bottom of the water storage tank.
Preferably, the dimethylamine hydrochloride recovery device further comprises a hydrochloric acid tank, and the hydrochloric acid tank is provided with a concentrated hydrochloric acid feeding pipe.
Preferably, the discharging end of the bottom of the water storage tank is also connected with the feeding end of the hydrochloric acid tank.
Preferably, the discharging end of the bottom of the water washing reaction kettle is connected with the feeding end of the hydrochloric acid tank.
Compared with the prior art, the utility model has at least the following advantages:
according to the dimethylamine hydrochloride production system, dimethylamine is conveyed to a first-stage filler adsorption tower through a dimethylamine feed pipe and a hydrochloric acid feed pipe, hydrochloric acid is conveyed to a third-stage filler adsorption tower through a hydrochloric acid feed pipe in a spraying mode, dimethylamine and hydrochloric acid are subjected to cyclic reaction in the third-stage seasoning adsorption tower, and dimethylamine hydrochloride solution is obtained after full absorption. The concentration can be uniformly absorbed through the three-level filler adsorption tower, dimethylamine is completely absorbed, waste is avoided, and raw materials are saved.
Drawings
Fig. 1 is a schematic diagram of a dimethylamine hydrochloride production system.
In the figure: dimethylamine hydrochloride production system 10, dimethylamine hydrochloride reaction device 100, primary filler adsorption tower 110, dimethylamine feed pipe 120, secondary filler adsorption tower 130, tertiary filler adsorption tower 140, hydrochloric acid feed pipe 150, spray nozzle 160, water washing reaction kettle 170, tail gas discharge pipe 180, dimethylamine hydrochloride refining device 200, distillation reaction kettle 210, cooling reaction kettle 220, drying reaction kettle 230, dimethylamine hydrochloride recovery device 300, water storage tank 310, hydrochloric acid tank 320 and concentrated hydrochloric acid feed pipe 330.
Description of the embodiments
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Referring to fig. 1, a dimethylamine hydrochloride production system, comprising:
dimethylamine hydrochloride reaction unit 100, dimethylamine hydrochloride reaction unit 100 includes first order filler adsorption tower 110, second grade filler adsorption tower 130, tertiary filler adsorption tower 140, first order filler adsorption tower 110 gaseous phase feed end is provided with dimethylamine inlet pipe 120, first order filler adsorption tower 110 gaseous phase discharge end is connected second grade filler adsorption tower 130 gaseous phase feed end, second grade filler adsorption tower 130 gaseous phase discharge end is connected tertiary filler adsorption tower 140 gaseous phase feed end, tertiary filler adsorption tower 140 liquid phase feed end is provided with hydrochloric acid inlet pipe 150, tertiary filler adsorption tower 140 liquid phase discharge end is connected second grade filler adsorption tower 130 liquid phase feed end, second grade filler adsorption liquid phase tower discharge end is connected first order filler adsorption tower 110 liquid phase feed end, first order filler adsorption tower 110 top is provided with spray hydrochloride solution extraction pipe, the filler adsorption tower is provided with shower nozzle 160.
A dimethylamine hydrochloride production system is characterized in that dimethylamine is firstly conveyed to a first-stage filler adsorption tower 110 through a dimethylamine feeding pipe 120 and a hydrochloric acid feeding pipe 150, hydrochloric acid is conveyed to a third-stage filler adsorption tower 140 through the hydrochloric acid feeding pipe 150 in a spraying mode, dimethylamine and hydrochloric acid are subjected to cyclic reaction in the third-stage seasoning adsorption tower, and dimethylamine hydrochloride solution is obtained after full absorption. The concentration absorption uniformity dimethylamine can be completely absorbed through the three-stage packing adsorption tower 140, so that the dimethylamine is not wasted, and the raw materials are saved.
In a preferred embodiment, the dimethylamine hydrochloride reaction device 100 further includes a water-washing reaction kettle 170, a top feeding end of the water-washing reaction kettle 170 is connected to a gas-phase discharging end of the three-stage filler adsorption tower 140, the water-washing reaction kettle 170 is provided with a tail gas discharging pipe 180, dimethylamine and hydrochloric acid are circularly reacted in the filler adsorption tower, after being fully absorbed, hydrochloride solution is conveyed into the water-washing reaction kettle 170 through a hydrochloride solution extraction pipe, and tail gas is discharged through the tail gas discharging pipe 180.
In a preferred embodiment, the dimethylamine hydrochloride production system comprises a dimethylamine hydrochloride refining device 200, the dimethylamine hydrochloride refining device 200 comprises a distillation reaction kettle 210, the feeding end of the distillation reaction kettle 210 is connected with the hydrochloride solution extraction pipe, the hydrochloride solution extraction pipe is conveyed into the distillation reaction kettle 210, the dimethylamine hydrochloride solution is distilled in the distillation reaction kettle 210, and water carried in the dimethylamine hydrochloride solution is evaporated, so that the dimethylamine hydrochloride solution with higher purity is obtained.
In a preferred embodiment, the dimethylamine hydrochloride refining apparatus 200 further comprises a cooling reaction kettle 220, wherein the feeding end of the cooling reaction kettle 220 is connected with the discharging end of the distillation reaction kettle 210, and the distilled hydrochloride solution is conveyed into the cooling reaction kettle 220 through the discharging end of the distillation reaction kettle 210, and the dimethylamine hydrochloride solution is cooled in the cooling reaction kettle 220.
In a preferred embodiment, the dimethylamine hydrochloride refining apparatus 200 further comprises a drying reaction kettle 230, the feeding end of the drying reaction kettle 230 is connected with the discharging end of the cooling reaction kettle 220, the cooled dimethylamine hydrochloride solution is conveyed into the drying reaction kettle 230 through the discharging end of the cooling reaction kettle 220, and white and non-caking dimethylamine hydrochloride crystals are obtained after the dimethylamine hydrochloride solution is freeze-dried in the drying reaction kettle 230 under low temperature and vacuum.
In a preferred embodiment, the dimethylamine hydrochloride production system further includes a dimethylamine hydrochloride recovery device 300, the dimethylamine hydrochloride recovery device 300 includes a water storage tank 310, a bottom discharge end of the water storage tank 310 is connected to a feed end of the water washing reaction kettle 170, and water in the water storage tank 310 is conveyed into the water washing reaction kettle 170 through a discharge end of the water storage tank 310 and recycled.
In a preferred embodiment, the top end of the distillation reaction kettle 210 is connected to the bottom feed end of the water storage tank 310, and the distilled water in the distillation reaction kettle 210 is transported to the water storage tank through the discharge end of the distillation reaction kettle 210 for recycling.
In a preferred embodiment, the dimethylamine hydrochloride recovery device 300 further comprises a hydrochloric acid tank 320, and the hydrochloric acid tank is provided with a concentrated hydrochloric acid feed pipe 330, and the concentrated hydrochloric acid feed pipe 330 is used for introducing concentrated hydrochloric acid into the hydrochloric acid tank.
In a preferred embodiment, the bottom discharge end of the water storage tank 310 is further connected to the feed end of the hydrochloric acid tank, so that the water in the water storage tank 310 is conveyed into the hydrochloric acid tank through the bottom discharge end of the water storage tank 310, and the water and the concentrated hydrochloric acid are neutralized and recycled.
In a preferred embodiment, the bottom discharge end of the water washing reaction kettle 170 is connected to the feed end of the hydrochloric acid tank, and part of the hydrochloric acid is contained in the water washing reaction kettle 170 and recycled into the hydrochloric acid tank.
The foregoing disclosure is illustrative of the preferred embodiments of the present utility model, and is not to be construed as limiting the scope of the utility model, as it is understood by those skilled in the art that all or part of the above-described embodiments may be practiced with equivalents thereof, which fall within the scope of the utility model as defined by the appended claims.
Claims (10)
1. A dimethylamine hydrochloride production system, characterized in that: comprising
Dimethylamine hydrochloride reaction unit, dimethylamine hydrochloride reaction unit includes one-level filler adsorption tower, second grade filler adsorption tower, tertiary filler adsorption tower, one-level filler adsorption tower gaseous phase feed end is provided with dimethylamine inlet pipe, one-level filler adsorption tower gaseous phase discharge end is connected second grade filler adsorption tower gaseous phase feed end, second grade filler adsorption tower gaseous phase discharge end is connected tertiary filler adsorption tower gaseous phase feed end, tertiary filler adsorption tower liquid phase feed end is provided with the hydrochloric acid inlet pipe, tertiary filler adsorption tower liquid phase discharge end is connected second grade filler adsorption tower liquid phase feed end, second grade filler adsorption liquid phase tower discharge end is connected one-level filler adsorption tower liquid phase feed end, one-level filler adsorption tower bottom is provided with the hydrochloride solution extraction pipe, the filler adsorption tower is provided with the shower nozzle.
2. The dimethylamine hydrochloride production system of claim 1, wherein: the dimethylamine hydrochloride reaction device further comprises a water washing reaction kettle, wherein the top feeding end of the water washing reaction kettle is connected with the gas phase discharging end of the three-level filler adsorption tower, and the water washing reaction kettle is provided with a tail gas discharging pipe.
3. The dimethylamine hydrochloride production system of claim 2, wherein: the dimethylamine hydrochloride production system comprises a dimethylamine hydrochloride refining device, wherein the dimethylamine hydrochloride refining device comprises a distillation reaction kettle, and the feed end of the distillation reaction kettle is connected with a hydrochloride solution extraction pipe.
4. A dimethylamine hydrochloride production system according to claim 3, wherein: the dimethylamine hydrochloride refining device further comprises a cooling reaction kettle, and the feeding end of the cooling reaction kettle is connected with the discharging end of the distillation reaction kettle.
5. The dimethylamine hydrochloride production system according to claim 4, wherein: the dimethylamine hydrochloride refining device also comprises a drying reaction kettle, and the feeding end of the drying reaction kettle is connected with the discharging end of the cooling reaction kettle.
6. A dimethylamine hydrochloride production system according to claim 3, wherein: the dimethylamine hydrochloride production system further comprises a dimethylamine hydrochloride recovery device, wherein the dimethylamine hydrochloride recovery device comprises a water storage tank, and the discharge end of the bottom of the water storage tank is connected with the feed end of the water washing reaction kettle.
7. The dimethylamine hydrochloride production system according to claim 6, wherein: and the material ejection end of the distillation reaction kettle is connected with the material feeding end of the kettle bottom of the water storage tank.
8. The dimethylamine hydrochloride production system according to claim 6, wherein: the dimethylamine hydrochloride recovery device further comprises a hydrochloric acid tank, and the hydrochloric acid tank is provided with a concentrated hydrochloric acid feeding pipe.
9. The dimethylamine hydrochloride production system of claim 8, wherein: and the discharging end at the bottom of the water storage tank is also connected with the feeding end of the hydrochloric acid tank.
10. The dimethylamine hydrochloride production system of claim 8, wherein: and the discharging end of the bottom of the water washing reaction kettle is connected with the feeding end of the hydrochloric acid tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321326479.9U CN220004053U (en) | 2023-05-29 | 2023-05-29 | Dimethylamine hydrochloride production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321326479.9U CN220004053U (en) | 2023-05-29 | 2023-05-29 | Dimethylamine hydrochloride production system |
Publications (1)
| Publication Number | Publication Date |
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| CN220004053U true CN220004053U (en) | 2023-11-14 |
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|---|---|---|---|
| CN202321326479.9U Active CN220004053U (en) | 2023-05-29 | 2023-05-29 | Dimethylamine hydrochloride production system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220004053U (en) |
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2023
- 2023-05-29 CN CN202321326479.9U patent/CN220004053U/en active Active
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