CN203048832U - Dimethylacetamide synthetic system - Google Patents
Dimethylacetamide synthetic system Download PDFInfo
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- CN203048832U CN203048832U CN 201220719906 CN201220719906U CN203048832U CN 203048832 U CN203048832 U CN 203048832U CN 201220719906 CN201220719906 CN 201220719906 CN 201220719906 U CN201220719906 U CN 201220719906U CN 203048832 U CN203048832 U CN 203048832U
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- dimethylacetamide
- acetic acid
- dimethylamine
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Abstract
The utility model provides a dimethylacetamide synthetic system which can be used for solving the problems that due to the instability of feeding amount of dimethylamine and the large pressure and temperature fluctuation of the synthetic system in the technology for producing dimethylacetamide by adopting acetic acid process, the product quality is influenced, and the yield is low. The dimethylacetamide synthetic system comprises a dimethylacetamide synthetic device, a dimethylamine feeding device, an acetic acid feeding device and a tail gas condensing device, wherein the dimethylacetamide synthetic device is used for synthesizing the dimethylacetamide, the dimethylamine feeding device is connected with the dimethylacetamide synthetic device and is used for supplying dimethylamine to the dimethylacetamide synthetic device, the acetic acid feeding device is connected with the dimethylacetamide synthetic device and is used for supplying acetic acid to the dimethylacetamide synthetic device, and the tail gas condensing device is connected with the dimethylacetamide synthetic device and is used for cooling tail gas discharged by the dimethylacetamide synthetic device. The technical scheme of the utility model is conductive to the improvement of quality of dimethylacetamide products.
Description
Technical field
The utility model relates to chemical production field, relates in particular to a kind of N,N-DIMETHYLACETAMIDE synthesis system.
Background technology
At present, in the production of N,N-DIMETHYLACETAMIDE, method of acetic acid is a kind of a kind of method of suitable serialization large-scale production, and its technology is that material synthesizes with acetic acid and dimethylamine mainly.But dimethylamine inlet amount instability appears in regular meeting in existing manufacturing technique, and synthesis system pressure, temperature fluctuation are big, thereby have influenced quality product, cause yield low excessively.For these problems, effective solution is not proposed as yet at present.
Summary of the invention
Main purpose of the present utility model provides a kind of N,N-DIMETHYLACETAMIDE synthesis system, dimethylamine charging material amount instability to occur in the production technique that solves method of acetic acid production N,N-DIMETHYLACETAMIDE in the prior art, synthesis system pressure, temperature fluctuation are big, thereby influenced quality product, caused the low excessively problem of yield.
To achieve these goals, the utility model provides a kind of N,N-DIMETHYLACETAMIDE synthesis system.
N,N-DIMETHYLACETAMIDE synthesis system of the present utility model comprises: the N,N-DIMETHYLACETAMIDE synthesizer, for the synthesis of N,N-DIMETHYLACETAMIDE; The dimethylamine feeding unit is connected with the N,N-DIMETHYLACETAMIDE synthesizer, and being used for provides the dimethylamine material to the N,N-DIMETHYLACETAMIDE synthesizer; The acetic acid feeding unit is connected with the N,N-DIMETHYLACETAMIDE synthesizer, and being used for provides the acetic acid material to the N,N-DIMETHYLACETAMIDE synthesizer; The tail gas condensing works is connected with the N,N-DIMETHYLACETAMIDE synthesizer, is used for the tail gas that cooling N,N-DIMETHYLACETAMIDE synthesizer is discharged.
Further, the N,N-DIMETHYLACETAMIDE synthesizer comprises: synthetic tower, and its upper end tail gas outlet is connected with the tail gas condensing works; Reboiler is arranged on the lower end of synthetic tower, and its opening for feed is connected with the acetic acid feeding unit with the dimethylamine feeding unit respectively, be used for will the dimethylamine material and the vaporization of acetic acid material after send in the synthetic tower.
Further, the dimethylamine feeding unit comprises: the dimethylamine groove is used for storage dimethylamine material; The diformazan amine pump, its opening for feed is connected with the discharge port of dimethylamine groove, and the discharge port of diformazan amine pump is connected with the circulation feeding mouth of N,N-DIMETHYLACETAMIDE synthesizer and dimethylamine groove respectively.
Further, the dimethylamine feeding unit also comprises: machine envelope refrigeration cycle pipeline, and the one end is connected with the cooling vent of diformazan amine pump, and the other end is connected with the circulation feeding mouth of dimethylamine groove.
Further, the acetic acid feeding unit comprises: the acetic acid groove is used for storage acetic acid material; The acetic acid pump, its opening for feed is connected with the discharge port of acetic acid groove, and the discharge port of acetic acid pump is connected with the circulation feeding mouth of acetic acid groove; The acetic acid topping-up pump, its opening for feed is connected with the discharge port of acetic acid pump, and its discharge port is connected with the N,N-DIMETHYLACETAMIDE synthesizer.
Further, the tail gas condensing works comprises: the soft water condenser, and its inlet mouth is connected with the tail gas outlet of synthetic tower, and its liquid outlet is connected with the opening for feed of reboiler; The soft water topping-up pump is connected with the soft water condenser, is used for improving the soft water pressure in the soft water condenser.
According to the technical solution of the utility model, turn back to the dimethylamine groove by the machine envelope cooling fluid that the diformazan amine pump is set, rather than return diformazan amine pump opening for feed, guaranteed that synthesizing dimethylamine charging material amount is stable, thereby stablized the N,N-DIMETHYLACETAMIDE quality product, also by the soft water topping-up pump is set, improve soft water pressure and Synthesis conversion, reduced production energy consumption.
Description of drawings
Figure of description is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not constitute improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation block diagram according to the N,N-DIMETHYLACETAMIDE synthesis system of the utility model embodiment.
Fig. 2 is the entity interface chart of Fig. 1.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe the utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Fig. 1 is the structural representation block diagram according to the N,N-DIMETHYLACETAMIDE synthesis system 10 of the utility model embodiment.
As shown in Figure 1, N,N-DIMETHYLACETAMIDE synthesis system 10 of the present utility model comprises:
N,N-DIMETHYLACETAMIDE synthesizer 11 is for the synthesis of N,N-DIMETHYLACETAMIDE.
Acetic acid feeding unit 15 is connected with N,N-DIMETHYLACETAMIDE synthesizer 11, and being used for provides the acetic acid material to N,N-DIMETHYLACETAMIDE synthesizer 11.
Tail gas condensing works 17 is connected with N,N-DIMETHYLACETAMIDE synthesizer 11, is used for the tail gas that cooling N,N-DIMETHYLACETAMIDE synthesizer 11 is discharged.
Fig. 2 is the entity interface chart of Fig. 1.
As shown in Figure 2, in this entity interface chart, comprise successively from left to right:
Diformazan amine pump 133, its opening for feed is connected with the discharge port of dimethylamine groove 131, and the discharge port of diformazan amine pump 133 is connected with the circulation feeding mouth of dimethylamine groove 131; The cooling vent of diformazan amine pump 133 is connected with machine envelope refrigeration cycle pipeline 135, and the other end of machine envelope refrigeration cycle pipeline 135 is connected with the circulation feeding mouth of dimethylamine groove 131.
Above dimethylamine groove 131, diformazan amine pump 133 and the machine envelope refrigeration cycle pipeline 135 common dimethylamine feeding units 13 of forming.
In the present embodiment, the machine envelope cooling fluid of diformazan amine pump 133 is housed in the machine envelope refrigeration cycle pipeline 135, what this machine envelope cooling fluid was used is the dimethylamine material.
The machine envelope refrigeration cycle pipeline 135 of traditional diformazan amine pump 133 adopts self hydronic mode, it is the cooling vent of the end connection diformazan amine pump 133 of machine envelope refrigeration cycle pipeline 135, the other end connects the opening for feed of diformazan amine pump 133, in the process with the cooling of dimethylamine material, cooled dimethylamine material is got back to the opening for feed of diformazan amine pump 133 again because of the high vaporization of temperature, cause diformazan amine pump 133 opening for feed band gas not look up and down, make synthetic charging lack dimethylamine, cause the acetic acid charging many, back operation can't be handled, and causes N,N-DIMETHYLACETAMIDE product acid content overproof.In the present embodiment, machine envelope cooling fluid turns back to dimethylamine groove 131, rather than return diformazan amine pump 133 opening for feeds, therefore not influencing diformazan amine pump 133 looks up and down, guaranteed that synthesizing dimethylamine charging material amount is stable, guarantee synthetic material proportion, N,N-DIMETHYLACETAMIDE product acid content is controlled below 50ppm, thereby has stablized the N,N-DIMETHYLACETAMIDE quality product.
Acetic acid topping-up pump 155, its opening for feed is connected with the discharge port of acetic acid pump 153, is used for increasing the discharging pressure of acetic acid material.
Above acetic acid groove 151, acetic acid pump 153 and the acetic acid topping-up pump 155 common acetic acid feeding units 15 of forming.
Wherein, reboiler 113 is arranged on the lower end of synthetic tower 111, and the opening for feed of reboiler 113 is connected with the discharge port of diformazan amine pump 133 and the discharge port of acetic acid topping-up pump 155 respectively, is used for sending in the synthetic tower 111 after dimethylamine material and the vaporization of acetic acid material.Dimethylamine material after synthetic tower 111 will be vaporized and acetic acid material reaction generate the aqueous mixture of N,N-DIMETHYLACETAMIDE, and the aqueous mixture of this N,N-DIMETHYLACETAMIDE is further handled at a tower and obtained pure N,N-DIMETHYLACETAMIDE.
Wherein, soft water condenser 171, its inlet mouth is connected with the upper end tail gas outlet of synthetic tower 111, its liquid outlet is connected with the opening for feed of reboiler 113, what be used for that cooling synthetic tower 111 discharges contains dimethylamine tail gas, and cooled dimethylamine liquid phase is sent to the opening for feed of reboiler 113, and make its repeated use, avoided wastage of material.In addition, the soft water gas in the soft water condenser 171 is discharged by its shell side outlet emptying.
Soft water topping-up pump 173 is connected with soft water condenser 171, is used for improving the soft water pressure in the soft water condenser 171.
Traditional tail gas condensing works 17 does not arrange soft water topping-up pump 173, make that the soft water pressure of soft water condenser 171 is low, has only 0.05Mpa, cause synthesis temperature, the pressure surge of synthetic tower 111, can't normal running, Synthesis conversion is lower, has only 72%, cause once through yield low, increase production energy consumption.In the present embodiment, set up soft water topping-up pump 173 after, the soft water pressure of soft water condenser 171 is brought up to 0.8Mpa, the synthesis pressure control of synthetic tower 111 is at 3.5Mpa, and temperature control is at 220 degree, and Synthesis conversion brings up to 85%, output is improved, thereby reduces production energy consumption.
In sum, N,N-DIMETHYLACETAMIDE synthesis system 10 of the present utility model, turn back to dimethylamine groove 131 by the machine envelope cooling fluid that diformazan amine pump 133 is set, rather than return diformazan amine pump 133 opening for feeds, guaranteed that synthesizing dimethylamine charging material amount is stable, has guaranteed synthetic material proportion, thereby has stablized the quality product of N,N-DIMETHYLACETAMIDE, also improve soft water pressure and Synthesis conversion by soft water topping-up pump 173 is set, reduced production energy consumption.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (6)
1. a N,N-DIMETHYLACETAMIDE synthesis system is characterized in that, comprising:
The N,N-DIMETHYLACETAMIDE synthesizer is for the synthesis of N,N-DIMETHYLACETAMIDE;
The dimethylamine feeding unit is connected with described N,N-DIMETHYLACETAMIDE synthesizer, and being used for provides the dimethylamine material to described N,N-DIMETHYLACETAMIDE synthesizer;
The acetic acid feeding unit is connected with described N,N-DIMETHYLACETAMIDE synthesizer, and being used for provides the acetic acid material to described N,N-DIMETHYLACETAMIDE synthesizer;
The tail gas condensing works is connected with described N,N-DIMETHYLACETAMIDE synthesizer, is used for the tail gas that the described N,N-DIMETHYLACETAMIDE synthesizer of cooling is discharged.
2. synthesis system according to claim 1 is characterized in that, described N,N-DIMETHYLACETAMIDE synthesizer comprises:
Synthetic tower, its upper end tail gas outlet is connected with described tail gas condensing works;
Reboiler is arranged on the lower end of described synthetic tower, and its opening for feed is connected with the acetic acid feeding unit with described dimethylamine feeding unit respectively, be used for will described dimethylamine material and the vaporization of described acetic acid material after send in the described synthetic tower.
3. synthesis system according to claim 1 is characterized in that, described dimethylamine feeding unit comprises:
The dimethylamine groove is used for the described dimethylamine material of storage;
The diformazan amine pump, its opening for feed is connected with the discharge port of described dimethylamine groove, and the discharge port of described diformazan amine pump is connected with the circulation feeding mouth of described N,N-DIMETHYLACETAMIDE synthesizer and described dimethylamine groove respectively.
4. synthesis system according to claim 3 is characterized in that, described dimethylamine feeding unit also comprises:
Machine envelope refrigeration cycle pipeline, the one end is connected with the cooling vent of described diformazan amine pump, and the other end is connected with the circulation feeding mouth of described dimethylamine groove.
5. synthesis system according to claim 1 is characterized in that, described acetic acid feeding unit comprises:
The acetic acid groove is used for the described acetic acid material of storage;
The acetic acid pump, its opening for feed is connected with the discharge port of described acetic acid groove, and the discharge port of described acetic acid pump is connected with the circulation feeding mouth of described acetic acid groove;
The acetic acid topping-up pump, its opening for feed is connected with the discharge port of described acetic acid pump, and its discharge port is connected with described N,N-DIMETHYLACETAMIDE synthesizer.
6. synthesis system according to claim 2 is characterized in that, described tail gas condensing works comprises:
The soft water condenser, its inlet mouth is connected with the tail gas outlet of described synthetic tower, and its liquid outlet is connected with the opening for feed of described reboiler;
The soft water topping-up pump is connected with described soft water condenser, is used for improving the soft water pressure in the described soft water condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220719906 CN203048832U (en) | 2012-12-24 | 2012-12-24 | Dimethylacetamide synthetic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220719906 CN203048832U (en) | 2012-12-24 | 2012-12-24 | Dimethylacetamide synthetic system |
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| CN203048832U true CN203048832U (en) | 2013-07-10 |
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| CN 201220719906 Expired - Lifetime CN203048832U (en) | 2012-12-24 | 2012-12-24 | Dimethylacetamide synthetic system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106883136A (en) * | 2017-03-17 | 2017-06-23 | 浙江联盛化学股份有限公司 | The synthetic method of 3 methoxyl group N, N dimethylpropionamides |
| CN106966923A (en) * | 2017-03-17 | 2017-07-21 | 浙江联盛化学股份有限公司 | A kind of synthetic method of 3 methoxyl group N, N dimethylpropionamides |
-
2012
- 2012-12-24 CN CN 201220719906 patent/CN203048832U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106883136A (en) * | 2017-03-17 | 2017-06-23 | 浙江联盛化学股份有限公司 | The synthetic method of 3 methoxyl group N, N dimethylpropionamides |
| CN106966923A (en) * | 2017-03-17 | 2017-07-21 | 浙江联盛化学股份有限公司 | A kind of synthetic method of 3 methoxyl group N, N dimethylpropionamides |
| CN106966923B (en) * | 2017-03-17 | 2019-07-26 | 浙江联盛化学股份有限公司 | A kind of synthetic method of 3- methoxyl group-N, N- dimethylpropionamide |
| CN106883136B (en) * | 2017-03-17 | 2019-07-26 | 浙江联盛化学股份有限公司 | The synthetic method of 3- methoxyl group-N, N- dimethylpropionamide |
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Effective date of registration: 20220507 Granted publication date: 20130710 |
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