CN208747974U - A kind of distillation and reflux device in 2,5- dimethoxy dihydrofuran synthetic reaction - Google Patents
A kind of distillation and reflux device in 2,5- dimethoxy dihydrofuran synthetic reaction Download PDFInfo
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- CN208747974U CN208747974U CN201820571553.6U CN201820571553U CN208747974U CN 208747974 U CN208747974 U CN 208747974U CN 201820571553 U CN201820571553 U CN 201820571553U CN 208747974 U CN208747974 U CN 208747974U
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Abstract
Distillation and reflux device in one kind 2,5- dimethoxy dihydrofuran synthetic reaction, including reaction kettle and collecting tank, head tank, head tank are connected to by pipeline with feed inlet, and the level height of head tank is higher than reaction kettle；It is connected with distillation cascade above reaction kettle, distillation cascade is connect with condenser pipe, is connected with outlet tube below condenser pipe, outlet tube is connected in collecting tank, a return pipe is connected on outlet tube, collecting tank is controlled to a vacuum pump, and vacuum buffer tank is equipped between collecting tank and vacuum pump；Distillation cascade is equipped with the first valve, and outlet tube is equipped with the second valve, and return pipe is equipped with third valve, and return pipe is U-shaped.Collecting tank sealing；A drain is equipped on distillation cascade between the first valve and condenser pipe, drain is equipped with the 4th valve；By distilling apparatus and the two-in-one design of reflux unit, equipment is saved, production is facilitated to improve efficiency, the design of head tank flows under the influence of gravity into reactant solution in reaction kettle, reduces 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, having after reaction
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 saves equipment, facilitates operation, 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 one kind 2,5- dimethoxy dihydrofuran synthetic reaction, including reaction kettle and collecting tank,
Reaction kettle is equipped with feed inlet, temperature sensor and pressure gauge, and reaction kettle is externally provided with collet, further includes head tank, and head tank is logical
Piping is connected to feed inlet, and the 5th valve is equipped between head tank and feed inlet, and the level height of head tank is higher than reaction kettle；It is described
It is connected with distillation cascade above reaction kettle, distillation cascade is connect with condenser pipe, and condenser pipe lower end is equipped with cooling water inlet, and upper end is equipped with cold
But water out, the condenser pipe lower section are connected with outlet tube, and outlet tube is connected in collecting tank, is connected on the outlet tube
It is connected to a return pipe, which connect with reaction kettle, and the collecting tank is controlled to a vacuum pump, in collecting tank and very
Vacuum buffer tank is equipped between sky pump；The first valve is equipped on the distillation cascade, outlet tube is equipped with the second valve, sets on return pipe
There is third valve.
The return pipe is U-shaped.
The collecting tank sealing.
First valve, the second valve, third valve, the 5th valve are solenoid valve.
A drain is equipped on distillation cascade between first valve and condenser pipe, drain is equipped with the 4th valve.
Above technical scheme is used, the utility model has the following beneficial effects: one kind 2,5- dimethoxy dihydrofuran
Distilling apparatus and the two-in-one design of reflux unit are saved equipment by the distillation and reflux device in synthetic reaction, can by valve
To realize distillation and reflux operation, production is facilitated to improve efficiency, the design of head tank flows reactant solution under the effect of gravity
Enter in reaction 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 the picture, the distillation and reflux device in 2,5- of one kind dimethoxy dihydrofuran synthetic reaction, including reaction
Kettle 1 and collecting tank 2, reaction kettle 1 are equipped with feed inlet 4, temperature sensor 5 and pressure gauge 6, and reaction kettle 1 is externally provided with collet 3, temperature
Degree sensor 5 and pressure gauge 6 are monitored the reactiveness in reaction kettle 1, and hot steam is led in collet 3 and is carried out to reaction kettle 1
Heating, to distill out final product；It further include head tank 7, head tank 7 is connected to by pipeline with feed inlet 4,7 He of head tank
The 5th valve 9 is equipped between feed inlet 4, the level height of head tank 7 is higher than reaction kettle 1, and reactant solution flows under the influence of gravity into
In reaction kettle 1；Distillation cascade 16 is connected with above the reaction kettle 1, distillation cascade 16 is connect with condenser pipe 8, and 8 lower end of condenser pipe is equipped with
Cooling water inlet 81, upper end are equipped with cooling water outlet 82, are connected with outlet tube 17 below condenser pipe 8, outlet tube 17 is connected to collection
In liquid bath 2, the final product 2 generated in reaction kettle 1,5- dimethoxy dihydrofuran is flowed into collecting tank 2 by distillation, is being gone out
A return pipe 18 is connected in liquid pipe 17, which connect with reaction kettle 1, the collecting tank 2 and vacuum pump
14 connections, are equipped with vacuum buffer tank 15 between collecting tank 2 and vacuum pump 14, and compensator or trimmer pressure prevents from flowing backward；In the distillation cascade
16 are equipped with the first valve 10, and outlet tube 17 is equipped with the second valve 11, and return pipe 18 is equipped with third valve 12.
Return pipe 18 is U-shaped, prevents solution in reflux course from flowing backwards.
Collecting tank 2 seals, and vacuum pump 14 connect with collecting tank 2, collecting tank 2 is sealed, when vacuum pump 14 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 10, the second valve 11, third valve 12, the 5th valve 9 are solenoid valve, and control operation of being more convenient for distillation and is returned
Flow into accommodating switching.
A drain is equipped on distillation cascade 16 between first valve 10 and condenser pipe 8, drain is equipped with the 4th valve
13, it avoids influencing due to outside air temperature or pressure is excessive in moving process, it is ensured that system safety.
The working principle of the utility model are as follows: the reactant in head tank, which flows into reaction kettle, to be started to be reacted, with
Reaction carries out methanol evaporation volatile in reactant, is unfavorable for reacting, closes the second valve at this time, opens the first valve and third
Valve, methanol gas flow into condenser pipe, and the methanol solution formed through condenser pipe is directly back to reaction kettle by U-shaped return pipe
In；End of reaction after Methanol Recovery is complete, opens the first valve, the second valve and vacuum pump, and entire reaction system is negative pressure shape at this time
The boiling point of state, target product reduces, and heats to reaction kettle, and product evaporated is steam, and the pipe that is condensed forms liquid, and passes through
Outlet tube flows into collecting tank, improves the yield of product, also saves the reaction time, reduces 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 (5)
1. one kind 2, distillation and reflux device in 5- dimethoxy dihydrofuran synthetic reaction, including reaction kettle (1) and collecting tank
(2), reaction kettle (1) is equipped with feed inlet (4), temperature sensor (5) and pressure gauge (6), reaction kettle (1) and is externally provided with collet (3),
It is characterized in that, further including head tank (7), head tank (7) is connected to by pipeline with feed inlet (4), head tank (7) and feed inlet
(4) the 5th valve (9) is equipped between, the level height of head tank (7) is higher than reaction kettle；Distillation is connected with above the reaction kettle (1)
It manages (16), distillation cascade (16) is connect with condenser pipe (8), and condenser pipe (8) lower end is equipped with cooling water inlet (81), and upper end is equipped with cooling
Water out (82), the condenser pipe (8) lower section are connected with outlet tube (17), and outlet tube (17) is connected in collecting tank (2),
A return pipe (18) are connected on the outlet tube (17), which connect with reaction kettle (1), described
Collecting tank (2) is connect with vacuum pump (14), is equipped with vacuum buffer tank (15) between collecting tank (2) and vacuum pump (14)；Described
Distillation cascade (16) be equipped with the first valve (10), outlet tube (17) be equipped with the second valve (11), return pipe (18) be equipped with third
Valve (12).
2. the distillation and reflux device in 2,5- dimethoxy dihydrofuran synthetic reaction as described in claim 1, feature exist
In the return pipe (18) is 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 (2) sealing.
4. the distillation and reflux device in 2,5- dimethoxy dihydrofuran synthetic reaction as described in claim 1, feature exist
In first valve (10), the second valve (11), third valve (12), the 5th valve (9) are solenoid valve.
5. the distillation and reflux device in 2,5- dimethoxy dihydrofuran synthetic reaction as described in claim 1, feature exist
In equipped with a drain between first valve and condenser pipe (8) on distillation cascade, drain is equipped with the 4th valve (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820571553.6U CN208747974U (en) | 2018-04-20 | 2018-04-20 | A kind of distillation and reflux device in 2,5- dimethoxy dihydrofuran synthetic reaction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820571553.6U CN208747974U (en) | 2018-04-20 | 2018-04-20 | A kind of distillation and reflux device in 2,5- dimethoxy dihydrofuran synthetic reaction |
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| CN208747974U true CN208747974U (en) | 2019-04-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023118970A1 (en) * | 2021-12-24 | 2023-06-29 | Vinati Organics Limited | System and process for acrylonitrile recovery during synthesis of acrylamido tertiary butyl sulfonic acid monomer |
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2018
- 2018-04-20 CN CN201820571553.6U patent/CN208747974U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023118970A1 (en) * | 2021-12-24 | 2023-06-29 | Vinati Organics Limited | System and process for acrylonitrile recovery during synthesis of acrylamido tertiary butyl sulfonic acid monomer |
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