CN208742518U - Distillation and reflux device in 2,5- dimethoxy dihydrofuran synthetic reaction - Google Patents
Distillation and reflux device in 2,5- dimethoxy dihydrofuran synthetic reaction Download PDFInfo
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- CN208742518U CN208742518U CN201820571543.2U CN201820571543U CN208742518U CN 208742518 U CN208742518 U CN 208742518U CN 201820571543 U CN201820571543 U CN 201820571543U CN 208742518 U CN208742518 U CN 208742518U
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Abstract
One kind 2, distillation and reflux device in 5- dimethoxy dihydrofuran synthetic reaction, including the first reaction kettle, second reaction kettle and collecting tank, first head tank and the second head tank, the first distillation cascade is connected with above first reaction kettle, first distillation cascade is connect with condenser pipe, after-fractionating pipe is connected with above second reaction kettle, outlet tube is connected with below condenser pipe, the end of outlet tube is connected respectively at the first return pipe and the second return pipe, first return pipe is connect with the first reaction kettle, second return pipe is connect with the second reaction kettle, the middle part of outlet tube is connect by liquid collecting tube with collecting tank；Collecting tank is controlled to a vacuum pump, and vacuum buffer tank is equipped between collecting tank and vacuum pump；Distillation and reflux device in the synthetic reaction of 2,5- dimethoxy dihydrofuran, by distilling apparatus and the two-in-one design of reflux unit, equipment is saved, production efficiency is improved, the design of head tank flows under the influence of gravity into reactant solution in reaction kettle, it is easy to use, reduce cost.
Description
Technical field
The utility model relates to chemical reaction equipments in chemical industry, the mainly synthesis of one kind 2,5- dimethoxy dihydrofuran
Distillation and reflux device in reaction.
Background technique
2,5- dimethoxy dihydrofuran are important medicine intermediates, can synthesize medicine for digestive system atrinaI
The drugs such as salt, Anisodamine can prepare important Speciality Petrochemicals intermediate fourth two by hydrochloric acid hydrolysis plus hydrogen
Aldehyde；In Chemical Manufacture, mainly using furans, sulfonic acid chloride and methanol as reactant, methanol is volatile liquid, in the reaction methanol
Constantly volatilization can be such that reaction process slows down, and need to carry out it reflux and back flow back into reaction system, in addition, after reaction again
Need to obtain final target product 2,5- dimethoxy dihydrofuran by distilling.In current production the reflux of product and
Distillation processing is using two independent devices mostly, and two processes are performed separately using two devices, but this operation mode,
Keep the coconnected pipeline of reaction kettle more and miscellaneous, is not easy to very much operate.
Utility model content
The purpose of the utility model is to overcome deficiencies in the prior art, provide one kind 2,5- dimethoxy dihydrofuran
Synthetic reaction in distillation and reflux device, by synthetic reaction distillation and reflux two devices be reduced in a device into
Row, meanwhile, the two-in-one device of a set of distillation and reflux, two reaction kettle simultaneous reactions are shared using two reaction kettles, saving is set
It is standby, facilitate operation, reduces production cost, while having saved the reaction time again.
In order to achieve the above object, the technical solution of the utility model are as follows:
Distillation and reflux device in the synthetic reaction of 2,5- dimethoxy dihydrofuran, including the first reaction kettle, the second reaction
Kettle and collecting tank, the first reaction kettle are equipped with first charging aperture, temperature sensor and pressure gauge, and the second reaction kettle is equipped with second
It is equipped with collet outside feed inlet, temperature sensor and pressure gauge, the first reaction kettle and the second reaction kettle, further includes the first head tank
With the second head tank, the first head tank is connected to by pipeline with first charging aperture, and the second head tank passes through pipeline and the second charging
Mouth connection, is equipped with the first valve between the first head tank and first charging aperture, the second valve is equipped between the second head tank and second charging aperture,
The height of first head tank is higher than the first reaction kettle, and the height of the second head tank is higher than the second reaction kettle；First reaction kettle
Top is connected with the first distillation cascade, and the first distillation cascade is connect with condenser pipe, is connected with after-fractionating above second reaction kettle
Pipe；Condenser pipe lower end is equipped with cooling water inlet, and upper end is equipped with cooling water outlet, is connected with outlet tube below the condenser pipe,
The end of outlet tube is connected respectively at the first return pipe and the second return pipe, and the first return pipe is connect with the first reaction kettle, and second
Return pipe is connect with the second reaction kettle, and the middle part of outlet tube is connect by liquid collecting tube with collecting tank；The collecting tank and vacuum
Pump connection, is equipped with vacuum buffer tank between collecting tank and vacuum pump；Third valve is equipped on first distillation cascade, second steams
Evaporate pipe equipped with the 4th valve, the first return pipe is equipped with the 5th valve, and the second return pipe is equipped with the 6th valve, and outlet tube is equipped with the
Seven valves.
First return pipe and the second return pipe are U-shaped.
Collecting tank sealing.
It is solenoid valve that first valve, the second valve, third valve, the 4th valve, the 5th valve, the 6th valve, the 7th valve, which are solenoid valve,.
Above technical scheme is used, the utility model has the following beneficial effects: the conjunction of 2,5- dimethoxy dihydrofuran
Distilling apparatus and the two-in-one design of reflux unit are saved into equipment at distillation and reflux device in reaction, it can be real by valve
Now distillation and reflux operation, facilitate production to improve efficiency, the design of head tank flows under the influence of gravity into reactant solution instead
It answers in kettle, it is easy to use, reduce cost.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model.
Specific embodiment
As shown in Fig. 1, distillation and reflux device in the synthetic reaction of 2,5- dimethoxy dihydrofuran, including the first reaction
Kettle 1, the second reaction kettle 2 and collecting tank 5, the first reaction kettle 1 are equipped with first charging aperture 3, temperature sensor and pressure gauge, temperature
Sensor and pressure gauge are monitored the reactiveness in reaction kettle, and the second reaction kettle 2 is equipped with second charging aperture 4, temperature
Collet is equipped with outside sensor and pressure gauge, the first reaction kettle 1 and the second reaction kettle 2, lead in collet hot steam to reaction kettle into
Row heating, further includes the first head tank 6 and the second head tank 7 to distill out final product, the first head tank 6 passes through pipeline
It is connected to first charging aperture 3, the second head tank 7 is connected to by pipeline with second charging aperture 4, the first head tank 6 and the first charging
It is equipped with the first valve 11 between mouth 3, the second valve 17 is equipped between the second head tank 7 and second charging aperture 4, the height of the first head tank 6 is high
It is higher than the second reaction kettle 2 in the height of the first reaction kettle 1, the second head tank 7, in order to which reactant solution flows under the effect of gravity
Enter in reaction kettle；The first distillation cascade 12 is connected with above first reaction kettle 1, the first distillation cascade 12 is connect with condenser pipe 8, and described
After-fractionating pipe 13 is connected with above two reaction kettles 2；8 lower end of condenser pipe is equipped with cooling water inlet 81, and upper end goes out equipped with cooling water
Mouthfuls 82, outlet tube 18 is connected with below the condenser pipe 8, and the end of outlet tube 18 is respectively at the first return pipe 20 and second time
Flow tube 21 connects, and the first return pipe 20 is connect with the first reaction kettle 1, and the second return pipe 21 is connect with the second reaction kettle 2, outlet tube
18 middle part is connect by liquid collecting tube 19 with collecting tank 2；The collecting tank 2 is connect with vacuum pump 10, in collecting tank 2 and vacuum
Vacuum buffer tank 9 is equipped between pump 10, compensator or trimmer pressure prevents from flowing backward；Third valve 22 is equipped on first distillation cascade 12, the
Two distillation cascades 13 are equipped with the 4th valve 23, and the first return pipe 20 is equipped with the 5th valve 15, and the second return pipe 21 is equipped with the 6th valve
16, outlet tube is equipped with the 7th valve 14, and the distillation and reflux behaviour of two reaction kettles are realized by the switch control of each valve
Make.
First return pipe 20 and the second return pipe 21 are U-shaped, prevent solution in reflux course from flowing backwards.
Collecting tank 5 seals, and vacuum pump 10 connect with collecting tank 5, collecting tank 5 is sealed, when vacuum pump 10 starts work
It is negative pressure state in entire Distallation systm when making, the boiling point of distilland can be effectively reduced, energy conservation improves the yield of fraction.
First valve 11, the second valve 17, third valve 22, the 4th valve 23, the 5th valve 15, the 6th valve 16, the 7th valve 14 are electromagnetism
Valve, control operation of being more convenient for, to distilling and flow back into accommodating switching.
The working principle of the utility model are as follows: the reactant in two head tanks separately flow into start in two reaction kettles into
Row reaction, as the volatile methanol in reactant that carries out reacted in two reaction kettles in left and right evaporates, be unfavorable for reaction into
Row closes third valve 22 and the 4th valve 23 at this time, opens the 5th valve 15 and the 6th valve 16, the first evaporated from two reaction kettles
Alcohol gas flows into condenser pipe 8, and the methanol solution formed through condenser pipe 8 passes through U-shaped first return pipe 20 and the second return pipe 21
Directly it is back in the first and second reaction kettles；End of reaction after Methanol Recovery is complete, opens third valve 22,14 and of the 7th valve
Vacuum pump 10, entire reaction system is negative pressure state at this time, and the boiling point of target product is reduced, heated to reaction kettle, product
Gasification is steam, and the pipe 8 that is condensed forms liquid, and flows into collecting tank 5 by outlet tube, improves the yield of product, also saves
Reaction time, two reaction kettles carry out production simultaneously and substantially increase production efficiency, and distillation and reflux device is two-in-one also to be reduced
Production cost.
Above-described is only preferred embodiments of the present invention, it is noted that for those skilled in the art
For, under the premise of not departing from the utility model general idea, several changes and improvements can also be made, these also should be considered as
The protection scope of the utility model.
Claims (4)
1. one kind 2, distillation and reflux device in 5- dimethoxy dihydrofuran synthetic reaction, including the first reaction kettle (1), second
Reaction kettle (2) and collecting tank (5), the first reaction kettle (1) are equipped with first charging aperture (3), temperature sensor and pressure gauge, and second
Reaction kettle (2) is equipped with second charging aperture (4), temperature sensor and pressure gauge, the first reaction kettle (1) and the second reaction kettle (2)
It is equipped with collet outside, which is characterized in that further include the first head tank (6) and the second head tank (7), the first head tank (6) passes through
Pipeline is connected to first charging aperture (3), and the second head tank (7) is connected to by pipeline with second charging aperture (4), the first head tank
(6) the first valve (11) are equipped between first charging aperture (3), the second valve is equipped between the second head tank (7) and second charging aperture (4)
(17), the height of the first head tank (6) is higher than the first reaction kettle (1), and the height of the second head tank (7) is higher than the second reaction kettle
(2)；It being connected with the first distillation cascade (12) above first reaction kettle (1), the first distillation cascade (12) is connect with condenser pipe (8),
After-fractionating pipe (13) are connected with above second reaction kettle (2)；Condenser pipe (8) lower end is equipped with cooling water inlet (81), on
End is equipped with cooling water outlet (82), is connected with outlet tube (18) below the condenser pipe (8), the end difference of outlet tube (18)
It being connected in the first return pipe (20) and the second return pipe (21), the first return pipe (20) is connect with the first reaction kettle (1), and second time
Flow tube (21) is connect with the second reaction kettle (2), and the middle part of outlet tube (18) is connect by liquid collecting tube (19) with collecting tank (5)；Out
Liquid pipe (18) is connected by liquid collecting tube (19) and collecting tank (5)；The collecting tank (5) is connect with vacuum pump (10), in liquid collecting
Vacuum buffer tank (9) are equipped between slot (5) and vacuum pump (10)；Third valve (22) are equipped on first distillation cascade (12),
After-fractionating pipe (13) is equipped with the 4th valve (23), and the first return pipe (20) is equipped with the 5th valve (15), the second return pipe (21)
It is equipped with the 6th valve (16), outlet tube (18) is equipped with.
2. the distillation and reflux device in 2,5- dimethoxy dihydrofuran synthetic reaction as described in claim 1, feature exist
In first return pipe (20) and the second return pipe (21) are U-shaped.
3. the distillation and reflux device in 2,5- dimethoxy dihydrofuran synthetic reaction as described in claim 1, feature exist
In the collecting tank (5) sealing.
4. the distillation and reflux device in 2,5- dimethoxy dihydrofuran synthetic reaction as described in claim 1, feature exist
In first valve (11), the second valve (17), third valve (22), the 4th valve (23), the 5th valve (15), the 6th valve (16),
Seven valves (14) are solenoid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820571543.2U CN208742518U (en) | 2018-04-20 | 2018-04-20 | Distillation and reflux device in 2,5- dimethoxy dihydrofuran synthetic reaction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820571543.2U CN208742518U (en) | 2018-04-20 | 2018-04-20 | Distillation and reflux device in 2,5- dimethoxy dihydrofuran synthetic reaction |
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| CN208742518U true CN208742518U (en) | 2019-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820571543.2U Active CN208742518U (en) | 2018-04-20 | 2018-04-20 | Distillation and reflux device in 2,5- dimethoxy dihydrofuran synthetic reaction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110433743A (en) * | 2019-06-30 | 2019-11-12 | 天津市长芦化工新材料有限公司 | The preparation facilities of perfluor isobutyl acyl fluorides |
-
2018
- 2018-04-20 CN CN201820571543.2U patent/CN208742518U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110433743A (en) * | 2019-06-30 | 2019-11-12 | 天津市长芦化工新材料有限公司 | The preparation facilities of perfluor isobutyl acyl fluorides |
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