CN202569620U - Rectification device for ethyl cyanoacetate - Google Patents
Rectification device for ethyl cyanoacetate Download PDFInfo
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- CN202569620U CN202569620U CN 201220206133 CN201220206133U CN202569620U CN 202569620 U CN202569620 U CN 202569620U CN 201220206133 CN201220206133 CN 201220206133 CN 201220206133 U CN201220206133 U CN 201220206133U CN 202569620 U CN202569620 U CN 202569620U
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- ethyl cyanoacetate
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Abstract
The utility model relates to a rectification device for ethyl cyanoacetate. The rectification device comprises a reaction kettle, a rectification tower, a re-boiler, a condenser and storage tanks. The rectification device is characterized in that the top of the re-boiler is connected with a crude product storage tank through a feeding pump, and the bottom of the re-boiler is connected with the upper part of the reaction kettle; the top of the reaction kettle is communicated with the rectification tower, and the bottom of the reaction kettle is respectively connected with a waste residue tank and a feeding pump; and the top of the rectification tower is connected with the condenser, and the outlet end of the condenser is respectively connected with the storage tanks. The rectification device is simple in structure and easy and convenient to operate; the purity of the separated ethyl cyanoacetate is high and can be over 99 percent, and the ethyl cyanoacetate meets the requirement of international markets; and the rectification device is low in production energy consumption, can realize continuous rectification, ensures the quality of the product, improves the work efficiency, greatly reduces the production cost, and has certain application value.
Description
Technical field
The utility model belongs to the chemical production equipment technical field, is specifically related to a kind of rectifier unit of ethyl cyanoacetate.
Background technology
At present, the international market is to the past growth trend of the demand of ethyl cyanoacetate development, especially Japanese market and European market, and very high to the quality requirement of product, purity will reach more than 99%.Compare scale with external manufacturer all general less and purity is lower yet China produces the producer of ethyl cyanoacetate, and content is generally about 95%, and it is less to reach 99% producer.
Cause the low reason of purity to be that the technology of China's production ethyl cyanoacetate typically uses the concentrated sulfuric acid as catalyst.Because the concentrated sulfuric acid has highly acid, can make the direct acidifying of part cyanoacetic acid become malonic acid.That is to say in esterification process except generating ethyl cyanoacetate, accessory substance diethyl malonate generation in addition.And the boiling point between ethyl cyanoacetate and the diethyl malonate differs 6～8 ℃, utilize the conventional distillation mode to be difficult to both are well separated, and energy resource consumption is big, and cost is high.So develop and a kind ofly guaranteeing that ethyl cyanoacetate purity reaches more than 99%, and rectifier unit simple in structure, easy and simple to handle, that energy utilization rate is high, certain application value had.
Summary of the invention
The utility model technical problem to be solved provides a kind of rectifier unit of ethyl cyanoacetate, has characteristics simple in structure, easy and simple to handle, the ethyl cyanoacetate product purity height that obtains after the rectifying and energy consumption is low, can realize continuity rectifying.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of rectifier unit of ethyl cyanoacetate, comprise agitated reactor, rectifying column, reboiler, condenser, bullion storage tank and finished product receiving tank, and it is characterized in that:
The top of said reboiler links to each other with the bullion storage tank through feed pump, and the bottom links to each other with agitated reactor top;
The top of said agitated reactor is connected with rectifying column, and the bottom links to each other with waste residue jar, feed pump respectively;
The top of said rectifying column links to each other with condenser, and the port of export of condenser links to each other with the finished product receiving tank respectively.
As improvement; Said condenser by mutual series connection first-stage condenser is set and secondary condenser is formed; Wherein first-stage condenser is connected with the top of said rectifying column, and secondary condenser is connected with said storage tank, and between secondary condenser and said rectifying column, is provided with reflux line.
Improve again, be parallel with the water tank that has vavuum pump on the said first-stage condenser, be provided with thermometer probe between said first-stage condenser and the said secondary condenser.
At last; Said finished product receiving tank is made up of a finished product surge tank and several finished product storage tank; The top of said finished product surge tank and one of them finished product storage tank directly links to each other with said secondary condenser, and all the other finished product storage tank link to each other with the bottom of said finished product surge tank through vavuum pump.
Compared with prior art, the advantage of the utility model is: the rectifier unit of the utility model is simple in structure and easy and simple to handle, and the ethyl cyanoacetate purity of separating is high; Can reach more than 99%; The needs that meet the international market, and energy consumption is low, can realize continuity rectifying, when guaranteeing product quality; Improve operating efficiency, greatly reduced production cost.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
A kind of rectifier unit of ethyl cyanoacetate; Comprise agitated reactor 3, reboiler 6, rectifying column 4, condenser, water tank 7, four finished product storage tank 9,11,12 and 13, finished product surge tank 10, bullion storage tank 1, waste residue jar 2 etc.; Bullion storage tank 1 links to each other with reboiler 6 tops through feed pump, and reboiler 6 bottoms link to each other with agitated reactor 3 tops; The top of agitated reactor 3 links to each other with rectifying column 4 bottoms, and the bottom links to each other with waste residue jar 2, feed pump respectively; Condenser is made up of with secondary condenser 8 first-stage condenser 5 of series connection; First-stage condenser 5 links to each other with rectifying column 4 tops; Parallel connection and the water tank 7 that has vavuum pump on the first-stage condenser 5; Secondary condenser 8 links to each other with the top of a finished product storage tank 9 and finished product surge tank 10 respectively, and the bottom of finished product surge tank 10 links to each other with 13 with other three finished product storage tank 11,12 respectively through vavuum pump, and between two condensers, is provided with thermometer probe 14.
Distillation process is such: the ethyl cyanoacetate bullion gets into agitated reactor 3 from bullion storage tank 1 through reboiler 6; After the circulation heating,, reach the critical point of gas-liquid separation through control first-stage condenser 5 temperature; Vaporize through the repeatedly part of first-stage condenser 5 and secondary condenser 8 again; Partial condensation is isolated diethyl malonate earlier, collects to get in the finished product storage tank 9; After isolate ethyl cyanoacetate and get into respectively in finished product storage tank 11,12 and 13 through finished product surge tank 10, the waste residue of staying in the agitated reactor 3 enters the waste residue jar 2 from the bottom of agitated reactor 3.
Claims (4)
1. the rectifier unit of an ethyl cyanoacetate comprises agitated reactor, rectifying column, reboiler, condenser and storage tank, it is characterized in that:
The top of said reboiler links to each other with the bullion storage tank through feed pump, and the bottom links to each other with agitated reactor top;
The top of said agitated reactor is connected with rectifying column, and the bottom links to each other with waste residue jar, feed pump respectively;
The top of said rectifying column links to each other with condenser, and the port of export of condenser links to each other with storage tank respectively.
2. rectifier unit according to claim 1; It is characterized in that said condenser is provided with first-stage condenser by mutual series connection and secondary condenser is formed; Wherein first-stage condenser is connected with the top of said rectifying column; Secondary condenser is connected with said storage tank, and between secondary condenser and said rectifying column, is provided with reflux line.
3. rectifier unit according to claim 1 is characterized in that being parallel with on the said first-stage condenser water tank that has vavuum pump, is provided with thermometer probe between said first-stage condenser and the said secondary condenser.
4. rectifier unit according to claim 1; It is characterized in that said storage tank is made up of a finished product surge tank and several finished product jars; The top of a wherein said finished product surge tank and a finished product jar directly links to each other with said secondary condenser, and all the other finished product jars link to each other with the bottom of said finished product surge tank through vavuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220206133 CN202569620U (en) | 2012-05-09 | 2012-05-09 | Rectification device for ethyl cyanoacetate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220206133 CN202569620U (en) | 2012-05-09 | 2012-05-09 | Rectification device for ethyl cyanoacetate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202569620U true CN202569620U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220206133 Expired - Fee Related CN202569620U (en) | 2012-05-09 | 2012-05-09 | Rectification device for ethyl cyanoacetate |
Country Status (1)
| Country | Link |
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| CN (1) | CN202569620U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107827778A (en) * | 2017-10-30 | 2018-03-23 | 烟台国邦化工机械科技有限公司 | A kind of continuous rectification refines cyanoacetate compound device and its technique |
-
2012
- 2012-05-09 CN CN 201220206133 patent/CN202569620U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107827778A (en) * | 2017-10-30 | 2018-03-23 | 烟台国邦化工机械科技有限公司 | A kind of continuous rectification refines cyanoacetate compound device and its technique |
| CN107827778B (en) * | 2017-10-30 | 2024-01-12 | 烟台国邦化工机械科技有限公司 | Device and process for refining cyanoacetic acid ester by continuous rectification |
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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: 20121205 Termination date: 20170509 |