CN203866232U - Continuous neutralization device for cyanogen acetate and malonate - Google Patents
Continuous neutralization device for cyanogen acetate and malonate Download PDFInfo
- Publication number
- CN203866232U CN203866232U CN201420198255.9U CN201420198255U CN203866232U CN 203866232 U CN203866232 U CN 203866232U CN 201420198255 U CN201420198255 U CN 201420198255U CN 203866232 U CN203866232 U CN 203866232U
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- China
- Prior art keywords
- pipe
- pipeline
- cylindrical shell
- mixing tank
- condenser
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Links
- 238000006386 neutralization reaction Methods 0.000 title abstract description 13
- HIOHRZIAENJDHP-UHFFFAOYSA-N CC(O)=O.N#CC#N Chemical compound CC(O)=O.N#CC#N HIOHRZIAENJDHP-UHFFFAOYSA-N 0.000 title abstract 2
- OFOBLEOULBTSOW-UHFFFAOYSA-L Malonate Chemical compound [O-]C(=O)CC([O-])=O OFOBLEOULBTSOW-UHFFFAOYSA-L 0.000 title abstract 2
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 238000000926 separation method Methods 0.000 claims abstract description 21
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 21
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- MLIREBYILWEBDM-UHFFFAOYSA-M 2-cyanoacetate Chemical compound [O-]C(=O)CC#N MLIREBYILWEBDM-UHFFFAOYSA-M 0.000 claims description 17
- IYXGSMUGOJNHAZ-UHFFFAOYSA-N Ethyl malonate Chemical compound CCOC(=O)CC(=O)OCC IYXGSMUGOJNHAZ-UHFFFAOYSA-N 0.000 claims description 17
- 230000003472 neutralizing effect Effects 0.000 claims description 10
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 9
- 230000032050 esterification Effects 0.000 claims description 6
- 238000005886 esterification reaction Methods 0.000 claims description 6
- 238000013022 venting Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 2
- 150000002148 esters Chemical class 0.000 description 16
- 238000000034 method Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000013517 stratification Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000004830 Super Glue Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- FGBJXOREULPLGL-UHFFFAOYSA-N ethyl cyanoacrylate Chemical compound CCOC(=O)C(=C)C#N FGBJXOREULPLGL-UHFFFAOYSA-N 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000013355 food flavoring agent Nutrition 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011403 purification operation Methods 0.000 description 1
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model belongs to the technical field of chemical equipment and particularly relates to a continuous neutralization device for cyanogen acetate and malonate, which comprises a condenser, a mixer, a buffer tank and a liquid-liquid separation centrifuge, wherein a first metering pump is mounted at the inlet end of the condenser; the outlet end of the condenser is communicated with an inlet end of the mixer; a second metering pump is mounted at the other inlet end of the mixer; an on-line pH meter is mounted at the outlet end of the mixer, and the outlet end of the mixer is communicated with a feed opening at the upper part of the buffer tank; an exhaust port used for emitting carbon dioxide is formed in the upper part of the buffer tank; a third metering pump is mounted at the discharge opening at the bottom of the buffer tank; the output end of the third metering pump is communicated with the inlet end of the liquid-liquid separation centrifuge. According to the continuous neutralization device, the neutralization and separation are operated continuously, so that the time is greatly shortened and the size of the applied equipment is reduced; through the adoption of the centrifuge, the separating efficiency and separation effect are improved and the yield is increased.
Description
Technical field
The utility model belongs to technical field of chemical, relates in particular to the continuous neutralizing device of a kind of cyanoacetate and malonic ester.
Background technology
Cyanoacetate and malonic ester, because the hydrogen atom on active methylene group in its molecule is easily replaced by other group, it is important fine chemicals, cyanoacetate is the main raw material of the serial cyanoacrylate adhesive of preparation, malonic ester is important medicine intermediate, is also the important raw material of preparing essence and flavoring agent.
In cyanoacetate and malonic ester preparation process, cyanoacetate and malonic ester must neutralize before purifying, and also need ester layer to carry out separated with water layer after neutralization.Tradition neutralization method adopts intermittent type neutralization, complex operation; Ester layer and water layer traditional separation method are to adopt the mode of stratification to carry out, due to esterification step and in and operation all adopt alr mode to carry out, even if the stratification time is long, ester layer material also still has a small amount of water layer small droplets and exists, equally, water layer material also still has a small amount of ester layer small droplets and exists, after neutralization, in material, contain a small amount of moisture, in purification process, can decompose by aggravation material, cause product yield low, a small amount of ester layer small droplets that water layer material contains directly causes yield to reduce.And, in actual production process, usually repeatedly divide water, complex operation.
Utility model content
The purpose of this utility model is to provide a kind of cyanoacetate and the continuous neutralizing device of malonic ester, be intended to solve in existing cyanoacetate and malonic ester preparation process, the neutralization of employing intermittent type, complex operation, ester layer employing separated with water layer stratification mode, contains water layer small droplets in ester layer material, contains ester layer small droplets in water layer material, cause product yield low, the problem of complex operation.
The utility model is to realize like this, the continuous neutralizing device of a kind of cyanoacetate and malonic ester, comprise condenser, mixing tank, surge tank and liquid liquid separation centrifuges, the entrance end of described condenser is provided with the first volume pump, the exit end of described condenser is communicated with an inlet end of described mixing tank, another inlet end of described mixing tank is provided with the second volume pump, the exit end of described mixing tank is provided with online pH meter and is communicated with the opening for feed on described surge tank top, described surge tank top is provided with for discharging the venting port of carbon dioxide, the discharge port of described surge tank bottom is provided with the 3rd volume pump, described the 3rd metering delivery side of pump is communicated with the entrance end of described liquid liquid separation centrifuges.
As a kind of improvement, described liquid liquid separation centrifuges is butterfly centrifugal machine or tubular-bowl centrifuge.
As improving further, described mixing tank comprises cylindrical shell, the entrance end of described cylindrical shell is axially arranged with the first pipeline entering for esterification material and the second pipe entering for aqueous sodium carbonate along described cylindrical shell, the caliber of described the first pipeline is greater than the caliber of described second pipe, described the first pipeline and second pipe coaxial package and described second pipe extend beyond described the first pipeline, the exit that is positioned at described the first pipeline on described second pipe is provided with ring diversion plate, the exit that is positioned at described second pipe in described cylindrical shell is provided with rotary blade by support rail, described rotary blade is provided with some blades that are obliquely installed.
As a kind of improvement, between described the first pipeline and second pipe and cylinder inboard wall, be provided with fixed transverse rod.
As a kind of improvement, on described cylinder inboard wall, between described rotary blade and the exit end of cylindrical shell, be provided with some water conservancy diversion flaps.
Owing to adopting technique scheme, the beneficial effects of the utility model are:
Due to the cyanoacetate after esterification and or malonic ester by the first volume pump, with certain flow, after condenser is cooled to suitable temperature, enter mixing tank, aqueous sodium carbonate enters mixing tank by the second volume pump with certain flow simultaneously, through fully having mixed N-process, the exit end of mixing tank is provided with online pH meter, by online pH meter, regulate aqueous sodium carbonate flow, because the speed of neutralization reaction is very fast, after having neutralized, material in mixing tank enters surge tank, the carbon dioxide that reaction generates is discharged from the venting port on surge tank top, material in surge tank is beaten to liquid liquid separation centrifuges with the 3rd volume pump, in whizzer, realize ester layer separated with water layer, neutralization and sepn process realize operation continuously, easy and simple to handle, greatly shortened the time, the volume of equipment used also dwindles, and use whizzer to improve separation efficiency and separating effect, moisture in ester layer reduces greatly, subsequent purification operation is produced to positively effect, effectively reduce ester-type hydrolysis process in purification process, product yield increases, also corresponding reduction of the acid number of material in purification process, thereby reduced the corrosion condition of equipment for purifying, increase the service life, and ester in water layer also reduces greatly, directly improved the yield of ester.
Because liquid liquid separation centrifuges is butterfly centrifugal machine or tubular-bowl centrifuge, guarantee the separating effect of ester layer and water layer.
Because the entrance end of mixer tube is provided with the first pipeline and second pipe, the first pipeline and second pipe coaxial package, being beneficial to material and aqueous sodium carbonate mixes, and the exit that is positioned at the first pipeline on second pipe is provided with ring diversion plate, the mobile speed forward of the ester class material that reduction enters from the first pipeline, the exit that is positioned at second pipe in cylindrical shell is provided with rotary blade by support rail, ester class material and aqueous sodium carbonate flow through rotary blade driven rotary vane rotary, under rotary blade effect, be beneficial to material and fully mix neutralization, and be provided with baffling guide plate, by working condition requirement and traffic requirement, its setting angle and installation site are set, material produces turbulent state during by water conservancy diversion flap, form small whirlpool, the flow velocity of material can occur sharply to change simultaneously, be beneficial to material and fully mix neutralization with aqueous sodium carbonate, be provided with fixed transverse rod, play the effect of fixing the first pipeline and second pipe.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present embodiment;
Fig. 2 is the sectional structure schematic diagram of mixing tank;
Wherein, 1-condenser, 2-mixing tank, 21-cylindrical shell, 22-the first pipeline, 23-second pipe, 24-fixed transverse rod, 25-ring diversion plate, 26-support rail, 27-rotary blade, 28-water conservancy diversion flap, 3-surge tank, 31-venting port, 4-liquid liquid separation centrifuges, 5-the first volume pump, 6-the second volume pump, the online pH meter of 7-, 8-the 3rd volume pump.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Fig. 1 and Fig. 2 are common, the continuous neutralizing device of a kind of cyanoacetate and malonic ester, comprise condenser 1, mixing tank 2, surge tank 3 and liquid liquid separation centrifuges 4, the entrance end of condenser 1 is provided with the first volume pump 5, the exit end of condenser 1 is communicated with an inlet end of mixing tank 2, another inlet end of mixing tank 2 is provided with the second volume pump 6, the exit end of mixing tank 2 is provided with online pH meter 7 and is communicated with the opening for feed on surge tank 3 tops, surge tank 3 tops are provided with for discharging the venting port 31 of carbon dioxide, the discharge port of surge tank 3 bottoms is provided with the 3rd volume pump 8, the output terminal of the 3rd volume pump 8 is communicated with the entrance end of liquid liquid separation centrifuges 4.
Wherein, above-mentioned liquid liquid separation centrifuges 4 is butterfly centrifugal machine or tubular-bowl centrifuge.
In the present embodiment, mixing tank 2 comprises cylindrical shell 21, the entrance end of cylindrical shell 21 is axially arranged with the first pipeline 22 entering for esterification material and the second pipe 23 entering for aqueous sodium carbonate along cylindrical shell 21, the caliber of the first pipeline 22 is greater than the caliber of second pipe 23, the first pipeline 22 and second pipe 23 coaxial packages and second pipe 23 extend beyond the first pipeline 22, between the first pipeline 22 and second pipe 23 and cylindrical shell 21 inwalls, be provided with fixed transverse rod 24, the exit that is positioned at the first pipeline 22 on second pipe 23 is provided with ring diversion plate 25, the exit that is positioned at second pipe 23 in cylindrical shell 21 is provided with rotary blade 27 by support rail 26, rotary blade 27 is provided with some blades that are obliquely installed, on cylindrical shell 21 inwalls, between rotary blade 27 and the exit end of cylindrical shell 21, be provided with some water conservancy diversion flaps 28.
In the present embodiment, the cyanoacetate that esterification completes or malonic ester with 5 dozens of the first volume pumps to condenser 1, through condenser 1, be cooled to temperature 30 degree, then enter mixing tank 2, simultaneously, concentration is 24% sodium carbonate solution through 6 dozens of the second volume pumps to mixing tank 2, mixing tank 2 exit end are installed online pH meter 7, pH is controlled at 7-8, then enter surge tank 3, the carbonic acid gas that reaction generates is discharged by the venting port 31 on surge tank 3 tops, the interior material of surge tank 3 with 8 dozens of the 3rd volume pumps to liquid liquid separation centrifuges 4, realize two layers of separation liquid liquid separation centrifuges 4 is interior, ester layer directly removes purification process, water layer adopts traditional scheme to process.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. a cyanoacetate and the continuous neutralizing device of malonic ester, it is characterized in that, comprise condenser, mixing tank, surge tank and liquid liquid separation centrifuges, the entrance end of described condenser is provided with the first volume pump, the exit end of described condenser is communicated with an inlet end of described mixing tank, another inlet end of described mixing tank is provided with the second volume pump, the exit end of described mixing tank is provided with online pH meter and is communicated with the opening for feed on described surge tank top, described surge tank top is provided with for discharging the venting port of carbon dioxide, the discharge port of described surge tank bottom is provided with the 3rd volume pump, described the 3rd metering delivery side of pump is communicated with the entrance end of described liquid liquid separation centrifuges.
2. the continuous neutralizing device of cyanoacetate according to claim 1 and malonic ester, is characterized in that, described liquid liquid separation centrifuges is butterfly centrifugal machine or tubular-bowl centrifuge.
3. the continuous neutralizing device of cyanoacetate according to claim 2 and malonic ester, it is characterized in that, described mixing tank comprises cylindrical shell, the entrance end of described cylindrical shell is axially arranged with the first pipeline entering for esterification material and the second pipe entering for aqueous sodium carbonate along described cylindrical shell, the caliber of described the first pipeline is greater than the caliber of described second pipe, described the first pipeline and second pipe coaxial package and described second pipe extend beyond described the first pipeline, the exit that is positioned at described the first pipeline on described second pipe is provided with ring diversion plate, the exit that is positioned at described second pipe in described cylindrical shell is provided with rotary blade by support rail, described rotary blade is provided with some blades that are obliquely installed.
4. the continuous neutralizing device of cyanoacetate according to claim 3 and malonic ester, is characterized in that, between described the first pipeline and second pipe and cylinder inboard wall, is provided with fixed transverse rod.
5. the continuous neutralizing device of cyanoacetate according to claim 3 and malonic ester, is characterized in that, is provided with some water conservancy diversion flaps on described cylinder inboard wall between described rotary blade and the exit end of cylindrical shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420198255.9U CN203866232U (en) | 2014-04-22 | 2014-04-22 | Continuous neutralization device for cyanogen acetate and malonate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420198255.9U CN203866232U (en) | 2014-04-22 | 2014-04-22 | Continuous neutralization device for cyanogen acetate and malonate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203866232U true CN203866232U (en) | 2014-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420198255.9U Expired - Fee Related CN203866232U (en) | 2014-04-22 | 2014-04-22 | Continuous neutralization device for cyanogen acetate and malonate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203866232U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107986963A (en) * | 2017-10-30 | 2018-05-04 | 烟台国邦化工机械科技有限公司 | A kind of continuous production cyanoacetate compound, the technique of malonate compound |
-
2014
- 2014-04-22 CN CN201420198255.9U patent/CN203866232U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107986963A (en) * | 2017-10-30 | 2018-05-04 | 烟台国邦化工机械科技有限公司 | A kind of continuous production cyanoacetate compound, the technique of malonate compound |
| CN107986963B (en) * | 2017-10-30 | 2021-01-01 | 烟台国邦化工机械科技有限公司 | Process for continuously producing cyanoacetate and malonate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 |