CN202909697U - Pipeline continuous reaction device for low-temperature diazo-reaction - Google Patents
Pipeline continuous reaction device for low-temperature diazo-reaction Download PDFInfo
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- CN202909697U CN202909697U CN 201220599723 CN201220599723U CN202909697U CN 202909697 U CN202909697 U CN 202909697U CN 201220599723 CN201220599723 CN 201220599723 CN 201220599723 U CN201220599723 U CN 201220599723U CN 202909697 U CN202909697 U CN 202909697U
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- reaction
- storage tank
- tubular reactor
- diazo
- strong acid
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Abstract
The utility model discloses a pipeline continuous reaction device for low-temperature diazo-reaction, which includes a tubular reactor, a strong acid storage tank and a sodium nitrite storage tank both connected with the pipe layer of the tubular reactor, and a low-temperature and constant-temperature reaction bath connected with the casing layer of the tubular reactor through a circulating pipeline, wherein a circulating pump is connected onto the circulating pipeline; a first feeding pump is connected between the tubular reactor and the strong acid storage tank; and a second feeding pump is connected between the tubular reactor and the sodium nitrite storage tank. The pipeline continuous reaction device adopts the manner of simultaneous constant-speed feeding as well as the low-temperature and constant-temperature reaction bath to cool the reactor, guarantees full reaction of raw materials, and avoids coupling reaction in the diazo-reaction.
Description
Technical field
The utility model relates to the diazo-reaction apparatus field, specifically a kind of pipeline continuous reaction apparatus for the low temperature diazo-reaction.
Background technology
Diazo-reaction is important organic synthesis, and very consequence is arranged in fine chemistry industry, uses very wide in dyestuff is synthetic.Diazol is unstable, generally is as the raw material of azo reaction, often adopts batch (-type) to prepare diazonium salt solution, bathes cooling with cryosel during reaction.Because the diazo reaction time is longer in pot intermittently, the rate of addition of sodium nitrite solution is bad control also, the product diazol easily and the generation of raw material arylamine is irreversible generates diazoamino compound from coupling reaction, so that the diazol quality reduces, hydrolysis also may occur in product, affects quality and the yield of product.
The utility model content
The technical problems to be solved in the utility model provides a kind of pipeline continuous reaction apparatus for the low temperature diazo-reaction, and raw material is fully reacted, and has avoided the coupled reaction in the diazo-reaction.
The technical solution of the utility model is:
A kind of pipeline continuous reaction apparatus for the low temperature diazo-reaction comprises tubular reactor, the strong acid storage tank and the natrium nitrosum storage tank that are connected with pipe reaction organ pipe layer, the cryogenic thermostat reactive bath technique that is connected with the tubular reactor shell by circulation line; Be connected with circulating pump on the described circulation line, be connected with the first feed pump between described tubular reactor and the strong acid storage tank, be connected with the second feed pump between tubular reactor and the natrium nitrosum storage tank.
Be connected with discharge tank on the described pipe reaction organ pipe layer.
Described strong acid storage tank and natrium nitrosum storage tank all are connected with pipe reaction organ pipe layer by triple valve.
Described the first feed pump and the second feed pump are all selected high pressure constant flow pump.
Described strong acid storage tank is selected the glass storage tank.
Described pipe reaction organ pipe layer is selected the titanium pipe.
Advantage of the present utility model:
(1), two feed pumps of the present utility model select can adjust flux high pressure constant flow pump, make two kinds of feed liquids at the uniform velocity enter reactor according to the ratio of requirement of experiment, thereby avoided the unmanageable problem of natrium nitrosum rate of addition; Because two kinds of raw materials evenly enter reactor by reaction ratio, do not have unnecessary raw material arylamine, therefore the timely outflow reactor of the product of generation has avoided product and raw material arylamine to occur from the idol reaction;
(2), the utility model is in the cryogenic thermostat reactive bath technique of tubular reactor connection, can keep the low temperature of tubular reactor always, make diazol be difficult for being hydrolyzed, solved simultaneously cryosel commonly used and bathed and need often problem on the rocks, and can reach than the more stable temperature of cryosel bath;
(3), the utility model sets out batch can, the product that pipeline reactor is generated continuously can in time flow out the raw material as next step reaction, and can not occur from the idol reaction with the raw material arylamine, has improved the quality of diazol;
(4), the incoming flow of material is to be reverse opposite in the pipe layer of the utility model tubular reactor and the shell, i.e. employing has the counter-current of better heat transfer property, so that cooling effect is higher.
Description of drawings
Fig. 1 is structural representation of the present utility model.
The specific embodiment
See Fig. 1, a kind of pipeline continuous reaction apparatus for the low temperature diazo-reaction, comprise tubular reactor 1, the strong acid storage tank 2, natrium nitrosum storage tank 3 and the discharge tank 4 that are connected with tubular reactor 1 pipe layer, the cryogenic thermostat reactive bath technique 5 that is connected with tubular reactor 1 shell by circulation line; Be connected with circulating pump 6 on the circulation line, be connected with the first feed pump 7 between tubular reactor 1 and the strong acid storage tank 2, be connected with the second feed pump 8 between tubular reactor 1 and the natrium nitrosum storage tank 3; Strong acid storage tank 2 is connected with the natrium nitrosum storage tank all and is connected by triple valve 9 and tubular reactor 1 pipe layer.Wherein, tubular reactor 1 pipe layer selects titanium pipe, strong acid storage tank to select 2 to use the glass storage tank, and the first feed pump 7 and the second feed pump 8 are all selected high pressure constant flow pump.
Use principle of the present utility model:
During experiment, first cryogenic thermostat reactive bath technique 5 is opened to temperature and reach setting value, then ON cycle pump 6 carries out cool cycles, when the temperature of tubular reactor 1 reaches temperature required, open the first feed pump 7 and the second feed pump 8, strong acid and natrium nitrosum are squeezed into triple valve 9 by the first feed pump 7 and the second feed pump 8 respectively and are mixed, and the pipe layer that flows into again tubular reactor 1 carries out diazo-reaction, and reacted product flows into discharge tank 4 from tubular reactor 1.
Claims (6)
1. pipeline continuous reaction apparatus that is used for the low temperature diazo-reaction, it is characterized in that: comprise tubular reactor, the strong acid storage tank and the natrium nitrosum storage tank that are connected with pipe reaction organ pipe layer, the cryogenic thermostat reactive bath technique that is connected with the tubular reactor shell by circulation line; Be connected with circulating pump on the described circulation line, be connected with the first feed pump between described tubular reactor and the strong acid storage tank, be connected with the second feed pump between tubular reactor and the natrium nitrosum storage tank.
2. a kind of pipeline continuous reaction apparatus for the low temperature diazo-reaction according to claim 1 is characterized in that: be connected with discharge tank on the described pipe reaction organ pipe layer.
3. a kind of pipeline continuous reaction apparatus for the low temperature diazo-reaction according to claim 1 is characterized in that: described strong acid storage tank and natrium nitrosum storage tank all are connected with pipe reaction organ pipe layer by triple valve.
4. a kind of pipeline continuous reaction apparatus for the low temperature diazo-reaction according to claim 1, it is characterized in that: described the first feed pump and the second feed pump are all selected high pressure constant flow pump.
5. a kind of pipeline continuous reaction apparatus for the low temperature diazo-reaction according to claim 1, it is characterized in that: described strong acid storage tank is selected the glass storage tank.
6. a kind of pipeline continuous reaction apparatus for the low temperature diazo-reaction according to claim 1, it is characterized in that: described pipe reaction organ pipe layer is selected the titanium pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220599723 CN202909697U (en) | 2012-11-14 | 2012-11-14 | Pipeline continuous reaction device for low-temperature diazo-reaction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220599723 CN202909697U (en) | 2012-11-14 | 2012-11-14 | Pipeline continuous reaction device for low-temperature diazo-reaction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202909697U true CN202909697U (en) | 2013-05-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220599723 Expired - Fee Related CN202909697U (en) | 2012-11-14 | 2012-11-14 | Pipeline continuous reaction device for low-temperature diazo-reaction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202909697U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017193725A1 (en) * | 2016-05-10 | 2017-11-16 | 中国恩菲工程技术有限公司 | System and method for treating cadmium-containing solution |
| WO2017193724A1 (en) * | 2016-05-10 | 2017-11-16 | 中国恩菲工程技术有限公司 | System and method for treating copper-containing solution |
-
2012
- 2012-11-14 CN CN 201220599723 patent/CN202909697U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017193725A1 (en) * | 2016-05-10 | 2017-11-16 | 中国恩菲工程技术有限公司 | System and method for treating cadmium-containing solution |
| WO2017193724A1 (en) * | 2016-05-10 | 2017-11-16 | 中国恩菲工程技术有限公司 | System and method for treating copper-containing solution |
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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 |
Granted publication date: 20130501 Termination date: 20151114 |
|
| EXPY | Termination of patent right or utility model |