CN115228387A - Continuous preparation system and method of 2-methyltetrahydrofuran - Google Patents
Continuous preparation system and method of 2-methyltetrahydrofuran Download PDFInfo
- Publication number
- CN115228387A CN115228387A CN202210665600.4A CN202210665600A CN115228387A CN 115228387 A CN115228387 A CN 115228387A CN 202210665600 A CN202210665600 A CN 202210665600A CN 115228387 A CN115228387 A CN 115228387A
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- edge
- fixed mounting
- fixed
- end surface
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- 238000002360 preparation method Methods 0.000 title claims abstract description 34
- JWUJQDFVADABEY-UHFFFAOYSA-N 2-methyltetrahydrofuran Chemical compound CC1CCCO1 JWUJQDFVADABEY-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 239000001257 hydrogen Substances 0.000 claims abstract description 27
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 27
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000007789 gas Substances 0.000 claims abstract description 19
- 239000003054 catalyst Substances 0.000 claims abstract description 18
- 239000002904 solvent Substances 0.000 claims abstract description 14
- 238000003860 storage Methods 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 5
- VQKFNUFAXTZWDK-UHFFFAOYSA-N 2-Methylfuran Chemical compound CC1=CC=CO1 VQKFNUFAXTZWDK-UHFFFAOYSA-N 0.000 claims description 34
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 230000000903 blocking effect Effects 0.000 claims description 11
- 239000003638 chemical reducing agent Substances 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 4
- 229910000564 Raney nickel Inorganic materials 0.000 claims description 3
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- UKVIEHSSVKSQBA-UHFFFAOYSA-N methane;palladium Chemical compound C.[Pd] UKVIEHSSVKSQBA-UHFFFAOYSA-N 0.000 claims description 3
- 238000010924 continuous production Methods 0.000 claims 9
- 230000000694 effects Effects 0.000 claims 2
- 239000003381 stabilizer Substances 0.000 claims 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 5
- 235000017491 Bambusa tulda Nutrition 0.000 description 5
- 241001330002 Bambuseae Species 0.000 description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 5
- 239000011425 bamboo Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 150000002431 hydrogen Chemical class 0.000 description 4
- 239000012535 impurity Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- GJOHLWZHWQUKAU-UHFFFAOYSA-N 5-azaniumylpentan-2-yl-(6-methoxyquinolin-8-yl)azanium;dihydrogen phosphate Chemical compound OP(O)(O)=O.OP(O)(O)=O.N1=CC=CC2=CC(OC)=CC(NC(C)CCCN)=C21 GJOHLWZHWQUKAU-UHFFFAOYSA-N 0.000 description 1
- 239000002879 Lewis base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002816 fuel additive Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000007527 lewis bases Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229960005462 primaquine phosphate Drugs 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
- B01J8/0292—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds with stationary packing material in the bed, e.g. bricks, wire rings, baffles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/008—Details of the reactor or of the particulate material; Processes to increase or to retard the rate of reaction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
- B01J8/0278—Feeding reactive fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
- B01J8/0285—Heating or cooling the reactor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
Abstract
The invention discloses a continuous preparation system and a continuous preparation method of 2-methyltetrahydrofuran, which comprises a bracket, wherein a metering tank is fixedly arranged at the upper end of the bracket close to the edge of the side edge, a reaction kettle is fixedly arranged at the upper end of the bracket close to the edge of the other side edge, a bag bottom plate is arranged in the reaction kettle, a circulating pump is fixedly arranged on the side surface of the reaction kettle, a gas-liquid separator is arranged at the bottom end of the inner side of the bracket close to the middle part, and a gas storage bottle is fixedly connected to the surface of the gas-liquid separator. According to the continuous preparation system and the continuous preparation method of the 2-methyltetrahydrofuran, the catalyst can be isolated and placed through the structure of the system device, the subsequent filtering processes are reduced, the debugging can be carried out in the assembling and disassembling process to avoid air contact, the arranged circulating pump assembly can pump the solvent from bottom to top to fully mix the solvent, the solvent can be heated and filtered in the process, and the redundant hydrogen can be recycled by matching with the gas-liquid separator.
Description
Technical Field
The invention relates to the technical field of chemical synthesis device structures, in particular to a continuous preparation system and a continuous preparation method of 2-methyltetrahydrofuran.
Background
2-methyl tetrahydrofuran (2-MeTHF) is an important organic intermediate and excellent solvent, because it has moderate boiling point (80.2 ℃), the solubility in water is small, it is easy to separate from water, and it has Lewis base similar to Tetrahydrofuran (THF), so it can be used in many organic metal reactions, at present it is widely used in industrial production as a new solvent, because 2-MeTHF can be dissolved with gasoline in any proportion, it has excellent oxidation and steam pressure, so it can be used as vehicle fuel additive to replace part of gasoline, the research shows that when the proportion of 2-MeTHF in gasoline exceeds 60%, it will not affect the performance of engine, the fuel consumption of vehicle will not increase, in addition, 2-methyl tetrahydrofuran is also the raw material of pharmaceutical industry, it can be used in the synthesis of pile-resisting medicine, such as primaquine phosphate, etc., the preparation of 2-methyl tetrahydrofuran has many methods, it can use different raw materials and different catalysts; the existing continuous preparation system and method of 2-methyltetrahydrofuran have certain drawbacks when in use, most of the existing structures are scattered and treated when the catalyst is stored, the existing structures are easy to contact with air and troublesome when being cleaned, and meanwhile, the traditional stirring mode of the stirring paddle cannot meet the use requirement, cannot quickly mix the solvent on the lower layer, and can easily cause the waste of hydrogen in the preparation process, and the discharged hydrogen can easily cause pollution.
Disclosure of Invention
The invention mainly aims to provide a continuous preparation system and a continuous preparation method of 2-methyltetrahydrofuran, which can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that:
a continuous preparation system and a continuous preparation method of 2-methyltetrahydrofuran comprise a support, wherein a metering tank is fixedly mounted at the upper end of the support close to the edge of the side edge, a reaction kettle is fixedly mounted at the upper end of the support close to the edge of the other side edge, a bottom plate is arranged in the reaction kettle, a circulating pump is fixedly mounted on the side surface of the reaction kettle, a gas-liquid separator is arranged at the bottom end of the inner side of the support close to the middle part, and a gas storage bottle is fixedly connected to the surface of the gas-liquid separator;
a baffle is fixedly arranged at the edge of the upper end surface of the pocket bottom plate, a blocking net is fixedly arranged at the inner side of the baffle on the upper end surface of the pocket bottom plate, a connecting cover is arranged at the upper end of the blocking net, a blocking cover is fixedly arranged at the edge of the bottom end surface of the connecting cover, an embedded groove is formed in the middle of the upper end surface of the connecting cover, an embedded plate is embedded and connected into the surface of the embedded groove, and a fixed seat is fixedly arranged at the middle of the upper end surface of the embedded plate;
the utility model discloses a panel, including baffle, bottom edge, clamping groove, caulking groove, movable groove, bottom edge, clamping groove, fixed mounting has the card strip, the bottom surface of caulking groove is located middle part department and has seted up the input groove, the surface of panel has been close to four corners edge and has seted up the screw, the card strip is connected with the clamping groove embedding. .
Preferably, the bottom surface of the support is fixedly provided with a support leg, and the surface of the support is fixedly provided with a connecting frame.
Preferably, the side surface of the metering tank is close to middle part department symmetry fixed mounting and has first fixed frame, the first closing cap of upper end fixed surface of metering tank is connected with, the upper end surface of first closing cap is located middle part department fixed mounting and has the speed reducer, the upper end fixed surface of speed reducer installs driving motor, the upper end surface of first closing cap is close to edge fixed mounting and throws the material lid, the bottom surface of metering tank is located middle part department fixed mounting and has the measuring pump, the fixed surface of measuring pump installs the conveyer pipe.
Preferably, the bottom surface of speed reducer rotates and is connected with the gangbar, the surperficial equidistance fixed mounting of gangbar has the stirring rake.
Preferably, reation kettle's side surface is close to middle part department symmetry fixed mounting and is decided the frame with the second, reation kettle's side surface is located one side fixed mounting that the frame was decided to the second and is had the flange, reation kettle's upper end fixed surface installs the second closing cap, the upper end surface of second closing cap is close to middle part department fixed mounting and has the buttjunction board, the fixed surface of buttjunction board installs the digging arm, the surface of digging arm is close to the other end and rotates and be connected with the fixed arm, the fixed surface of fixed arm installs the cylinder, the opposite side fixed mounting of fixed arm has the anticreep seat, reation kettle's quantity is provided with two, connect through the transmission pipe between the reation kettle.
Preferably, the upper end fixed surface of circulating pump installs first processing jar, the surface of first processing jar is close to middle part department fixed mounting and has first communicating pipe, the upper end fixed surface of first processing jar installs the mounting bracket, the bottom fixed surface of mounting bracket installs automatically controlled ware, the bottom fixed surface of automatically controlled ware installs the glow stick, the bottom fixed surface of circulating pump installs the second processing jar, the side surface of second processing jar is close to middle part department fixed mounting and has the second communicating pipe, the inboard bottom surface of second processing jar has seted up the butt joint groove, the inboard surface embedding of second processing jar is connected with interior lining section of thick bamboo, the upper end fixed surface of interior lining section of thick bamboo installs the filter screen, the side surface of interior lining section of thick bamboo is close to middle part department and has seted up the toper opening, the side surface of interior lining section of thick bamboo is close to bottom edge symmetry fixed mounting and has the fixed head, the surface of fixed head has seted up the spiral shell near the edge, the inboard bottom surface spiral connection of interior lining section of thick bamboo has the thread head, the bottom surface fixed surface of twisting thread head installs the turn-around.
Preferably, vapour and liquid separator's upper end fixed surface installs into the pipe, vapour and liquid separator's side surface is close to bottom department fixed mounting and has the exit tube, vapour and liquid separator's side surface is close to upper end edge fixed mounting and has the outlet duct, the surface of outlet duct is close to one end department fixed mounting and has the automatically regulated valve, the surface of outlet duct is located the opposite side fixed mounting of automatically regulated valve and has the condenser, the surface of outlet duct is close to other end department fixed mounting and has the hydrogen compressor.
Preferably, the upper end fixed surface of gas bomb installs the flowmeter, the upper end fixed surface of flowmeter installs the shunt tubes, the fixed surface of shunt tubes installs the automatically controlled valve, the gas bomb is provided with two jars.
The invention also discloses a continuous preparation method of the 2-methyltetrahydrofuran, which comprises the following steps:
s1, putting reserved 2-methylfuran into a metering tank, putting 2-methylfuran to be processed and a Raney nickel catalyst into a first reaction kettle, and then putting 2-methylfuran to be processed and a palladium carbon catalyst into a second reaction kettle;
s2, opening the gas storage bottles for storing nitrogen and hydrogen respectively to enable the mixture of the nitrogen and the hydrogen to activate and dry the catalyst, gradually exhausting air in the system device, and gradually increasing the output of the hydrogen in the process so as to continuously improve the hydrogen content in the reaction kettle
S3, starting a circulating pump, filtering the pumped solvent by using a second treatment tank, heating the pumped solvent by matching with a first treatment tank, gradually heating the interiors of the two groups of reaction kettles to a certain temperature, keeping the interiors of the two groups of reaction kettles in a certain pressure environment, and simultaneously opening a metering pump at the bottom of the metering tank to pump out the stored 2-methylfuran at a certain speed so as to meet the preparation consumption supplement of the 2-methylfuran and ensure continuous preparation;
and S4, after the liquid entering the gas-liquid separator reaches a certain liquid level, opening a valve body connected with the gas-liquid separator and externally connected with a receiving tank for further rectifying the obtained liquid.
Preferably, the circulating pump is electrically connected with an external power supply.
Compared with the prior art, the invention has the following beneficial effects:
in the invention, 1) for storing the catalyst, the catalyst can be put into the embedded groove from the upper part, then the embedded plate is closed, and the holes on the surface of the blocking net are utilized, so that the subsequent uniform collection and cleaning of the catalyst are convenient when the influence of the catalyst on the preparation process is not influenced, and the shielding cover and the baffle are overlapped in a staggered way, so that the contact chance of air and the catalyst can be reduced when the pocket bottom plate component is disassembled and assembled;
2) After the preparation raw materials are put into the reaction kettle for reaction preparation, the circulating pump can be started to pump the solvent at the bottom into the second treatment tank from the second communicating pipe, the doped impurities are difficult to flow out through the conical port, and are finally blocked and deposited in the twisting head by the filter screen, and the solution can be heated after entering the first treatment tank to meet the reaction preparation requirement;
3) The hydrogen separated by the gas-liquid separator passes through the automatic regulating valve and the condenser in sequence and is finally filled into the gas storage bottle for storing the hydrogen under the driving of the hydrogen compressor, so that on one hand, the hydrogen carried in the prepared product can be recycled, and on the other hand, the pollution caused by hydrogen discharge can be reduced.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a metering tank of the present invention;
FIG. 3 is a schematic view of the connection structure of the reaction vessel of the present invention;
FIG. 4 is an enlarged view at A in FIG. 3;
FIG. 5 is a schematic view of a second cover and pocket floor assembly attachment configuration of the present invention;
FIG. 6 is a schematic illustration of a pocket floor assembly according to the present invention, shown disassembled;
FIG. 7 is an enlarged view at B in FIG. 6;
FIG. 8 is a schematic view of a disassembled structure of the circulating pump assembly of the present invention;
FIG. 9 is a schematic view of the gas-liquid separator assembly of the present invention;
fig. 10 is a schematic view of the gas cylinder structure of the present invention.
In the figure: 1. a support; 101. a support leg; 102. a connecting frame; 2. a metering tank; 201. a first fixed frame; 202. a first cover; 203. a speed reducer; 204. a drive motor; 205. a feeding cover; 206. a metering pump; 207. a delivery pipe; 3. a reaction kettle; 301. a second stationary frame; 302. a flange; 303. a second cover; 304. a butt plate; 305. a movable arm; 306. a fixed arm; 307. a cylinder; 308. an anti-drop seat; 4. a pocket bottom plate; 401. a baffle plate; 402. blocking the net; 403. a connecting cover; 404. a shielding cover; 405. caulking grooves; 406. a panel; 407. a fixed seat; 408. a movable tank 5 and a circulating pump; 501. a first treatment tank; 502. a first communication pipe; 503. a mounting frame; 504. an electric controller; 505. an electric heating rod; 506. a second treatment tank; 507. a second communicating pipe; 508. a liner barrel; 509. filtering with a screen; 5010. a conical port; 5011. a fixed head; 5012. a screw head; 5013. and (5) twisting the rotary head. 6. A gas-liquid separator; 601. feeding a pipe; 602. discharging a pipe; 603. an air outlet pipe; 604. an automatic regulating valve; 605. a condenser; 606. a hydrogen compressor; 7. a gas storage cylinder; 701. a flow meter; 702. a shunt tube; 703. an electrically controlled valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-10, a continuous preparation system of 2-methyltetrahydrofuran and a method thereof, comprising a support 1, wherein a metering tank 2 is fixedly arranged at the upper end of the support 1 near the edge of the side edge, a reaction kettle 3 is fixedly arranged at the upper end of the support 1 near the edge of the other side edge, a bag bottom plate 4 is arranged inside the reaction kettle 3, a circulating pump 5 is fixedly arranged on the side surface of the reaction kettle 3, a gas-liquid separator 6 is arranged at the bottom end of the inner side of the support 1 near the middle part, and a gas storage bottle 7 is fixedly connected to the surface of the gas-liquid separator 6;
a baffle 401 is fixedly installed on the upper end surface of the pocket bottom plate 4 at the edge, a blocking net 402 is fixedly installed on the upper end surface of the pocket bottom plate 4 at the inner side of the baffle 401, a connecting cover 403 is arranged at the upper end of the blocking net 402, a blocking cover 404 is fixedly installed on the bottom end surface of the connecting cover 403 at the edge, an embedding groove 405 is formed in the middle of the upper end surface of the connecting cover 403, an embedded plate 406 is embedded and connected into the surface of the embedding groove 405, and a fixed seat 407 is fixedly installed on the middle of the upper end surface of the embedded plate 406;
the upper end surface of the baffle 401 is provided with a movable groove 408, the surface of the movable groove 408 close to the bottom edge is provided with a clamping groove, the outer side surface of the shielding cover 404 close to the bottom edge is fixedly provided with a clamping strip, the bottom surface of the caulking groove 405 is provided with a putting groove at the middle part, the surface of the panel 406 close to the four corners edge is provided with screw holes, and the clamping strip is connected with the clamping groove in an embedding way;
the bottom end surface of the bracket 1 is fixedly provided with a support leg 101, and the surface of the bracket 1 is fixedly provided with a connecting frame 102;
a first fixing frame 201 is symmetrically and fixedly installed on the side surface of the metering tank 2 close to the middle, a first sealing cover 202 is fixedly connected to the upper end surface of the metering tank 2, a speed reducer 203 is fixedly installed on the upper end surface of the first sealing cover 202 located in the middle, a driving motor 204 is fixedly installed on the upper end surface of the speed reducer 203, a feeding cover 205 is fixedly installed on the upper end surface of the first sealing cover 202 close to the edge, a metering pump 206 is fixedly installed on the bottom end surface of the metering tank 2 located in the middle, and a conveying pipe 207 is fixedly installed on the surface of the metering pump 206;
the bottom end surface of the speed reducer 203 is rotatably connected with a linkage rod, and stirring paddles are fixedly arranged on the surface of the linkage rod at equal intervals;
a second fixed frame 301 is symmetrically and fixedly installed on the side surface of the reaction kettle 3 close to the middle part, a flange 302 is fixedly installed on one side of the side surface of the reaction kettle 3 close to the second fixed frame 301, a second sealing cover 303 is fixedly installed on the upper end surface of the reaction kettle 3, a butt plate 304 is fixedly installed on the upper end surface of the second sealing cover 303 close to the middle part, a movable arm 305 is fixedly installed on the surface of the butt plate 304, a fixed arm 306 is rotatably connected to the surface of the movable arm 305 close to the other end, an air cylinder 307 is fixedly installed on the surface of the fixed arm 306, an anti-falling seat 308 is fixedly installed on the other side surface of the fixed arm 306, two reaction kettles 3 are arranged, and the reaction kettles 3 are connected through a transmission pipe;
a first treatment tank 501 is fixedly arranged on the surface of the upper end of a circulating pump 5, a first communicating pipe 502 is fixedly arranged on the surface of the first treatment tank 501 close to the middle part, a mounting frame 503 is fixedly arranged on the surface of the upper end of the first treatment tank 501, an electric controller 504 is fixedly arranged on the surface of the bottom end of the mounting frame 503, an electric heating rod 505 is fixedly arranged on the surface of the bottom end of the electric controller 504, a second treatment tank 506 is fixedly arranged on the surface of the bottom end of the circulating pump 5, a second communicating pipe 507 is fixedly arranged on the surface of the side surface of the second treatment tank 506 close to the middle part, a butt joint groove is formed on the surface of the bottom end of the inner side of the second treatment tank 506, an inner lining cylinder 508 is embedded and connected on the surface of the inner side of the inner lining cylinder 508, a filter screen 509 is fixedly arranged on the surface of the upper end of the inner lining cylinder 508 close to the middle part, a conical through hole 5010 is formed on the side surface of the inner lining cylinder 508 close to the middle part, fixing joints 5011 are symmetrically and fixedly arranged on the surface of the bottom end edge, a screw groove is formed on the surface of the fixing joint 5011 close to the edge, a screw thread head 5012 is spirally connected on the surface of the bottom end of the inner side of the inner lining cylinder 508, and a screw head 5013 is fixedly arranged on the surface of the screw head 5012;
an inlet pipe 601 is fixedly installed on the surface of the upper end of the gas-liquid separator 6, an outlet pipe 602 is fixedly installed on the side surface of the gas-liquid separator 6 close to the bottom end, an outlet pipe 603 is fixedly installed on the side surface of the gas-liquid separator 6 close to the edge of the upper end, an automatic regulating valve 604 is fixedly installed on the surface of the outlet pipe 603 close to one end, a condenser 605 is fixedly installed on the surface of the outlet pipe 603 on the other side of the automatic regulating valve 604, and a hydrogen compressor 606 is fixedly installed on the surface of the outlet pipe 603 close to the other end;
the upper end surface of the gas storage bottle 7 is fixedly provided with a flow meter 701, the upper end surface of the flow meter 701 is fixedly provided with a shunt pipe 702, the surface of the shunt pipe 702 is fixedly provided with an electric control valve 703, and the gas storage bottle 7 is provided with two tanks.
The embodiment of the invention also discloses a continuous preparation method of 2-methyltetrahydrofuran, which comprises the following steps:
s1, putting reserved 2-methylfuran into a metering tank 2, putting 2-methylfuran to be processed and a Raney nickel catalyst into a first reaction kettle 3, and then putting 2-methylfuran to be processed and a palladium carbon catalyst into a second reaction kettle 3;
s2, opening the gas storage bottles 7 for storing nitrogen and hydrogen respectively to enable the mixture of the nitrogen and the hydrogen to activate and dry the catalyst, gradually exhausting air in the system device, and gradually increasing the output of the hydrogen in the process so as to continuously improve the hydrogen content in the reaction kettle 3
S3, starting a circulating pump 5, filtering the pumped solvent by using a second treatment tank 506, heating the pumped solvent by matching with a first treatment tank 501, gradually raising the temperature of the interiors of the two groups of reaction kettles 3 to a certain temperature, keeping the interiors under a certain pressure environment, and simultaneously opening a metering pump 206 at the bottom of a metering tank 2 to pump the stored 2-methylfuran at a certain speed so as to meet the preparation consumption supplement of the 2-methylfuran and ensure continuous preparation;
s4, after the liquid entering the gas-liquid separator 6 reaches a certain liquid level, a valve body connected with the gas-liquid separator and externally connected with a receiving tank can be opened for further rectification of the obtained liquid;
the circulating pump 5 is electrically connected with an external power supply.
The working principle is as follows: after the device preparation process is started, the speed reducer 203 can be started, the driving motor 204 drives the internal stirring structure to mix according to a set speed, the metering pump 206 is opened, the pre-stored 2-methylfuran can be led out according to a set speed, so as to meet the supplement requirement of the 2-methylfuran, before, when the device is dried and emptied by using nitrogen and hydrogen, the opening degree of the electric control valve 703 can be controlled, so that the gas storage bottle 7 respectively storing nitrogen and hydrogen discharges a certain amount of gas through the flow meter 701, the content ratio of hydrogen in the device is gradually controlled, after the preparation raw materials are put into the reaction kettle 3 for reaction preparation, the circulating pump 5 can be started, so that the solvent at the bottom is pumped into the second processing tank 506 from the second communicating pipe 507, the doped impurities are difficult to flow out through the tapered port 5010, and are finally blocked and deposited inside the screwing head 5013 by the filter screen 509, after the raw materials enter the first processing tank, the solution can be heated, so as to meet the requirement of reaction preparation, and in the reaction preparation, the catalyst is always stored in the screen 402, the catalyst is blocked on the surface of the screen, the screen panel 408, the panel is easily removed, and the panel is capable of being connected with the movable screen cover 406, and the panel 408, so as to reduce the catalyst, and the catalyst can be easily removed, and the panel cover 406, and the panel is easily removed, and the panel cover can be easily removed, and can be used in the panel cover 406 in the process of the movable screen cover 406.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A continuous preparation system of 2-methyltetrahydrofuran, which comprises a bracket (1), and is characterized in that: a metering tank (2) is fixedly mounted at the upper end of the support (1) close to the edge of the side edge, a reaction kettle (3) is fixedly mounted at the upper end of the support (1) close to the edge of the other side edge, a bag bottom plate (4) is arranged inside the reaction kettle (3), a circulating pump (5) is fixedly mounted on the side surface of the reaction kettle (3), a gas-liquid separator (6) is arranged at the bottom end of the inner side of the support (1) close to the middle part, and a gas storage bottle (7) is fixedly connected to the surface of the gas-liquid separator (6);
the upper end surface of the pocket bottom plate (4) is positioned at the edge and is fixedly provided with a baffle plate (401), the upper end surface of the pocket bottom plate (4) is positioned at the inner side of the baffle plate (401) and is fixedly provided with a blocking net (402), the upper end of the blocking net (402) is provided with a connecting cover (403), the bottom end surface of the connecting cover (403) is positioned at the edge and is fixedly provided with a blocking cover (404), the upper end surface of the connecting cover (403) is positioned at the middle part and is provided with an embedded groove (405), the surface of the embedded groove (405) is embedded and connected with an embedded plate (406), and the upper end surface of the embedded plate (406) is positioned at the middle part and is fixedly provided with a fixed seat (407);
activity groove (408) have been seted up to the upper end surface of baffle (401), the surface in activity groove (408) is close to bottom edge and has been seted up the draw-in groove, the outside surface that shelters from lid (404) is close to bottom edge fixed mounting has the card strip, the bottom surface position in middle part department of caulking groove (405) has seted up the input groove, the surface of panel (406) is close to four corners edge and has seted up the screw, the card strip is connected with the draw-in groove embedding.
2. The continuous production system of 2-methyltetrahydrofuran according to claim 1, wherein: the bottom surface fixed mounting of support (1) has stabilizer blade (101), the fixed surface mounting of support (1) has link (102).
3. The continuous production system of 2-methyltetrahydrofuran according to claim 2, wherein: the utility model discloses a material feeding device, including metering tank (2), the side surface of metering tank (2) is close to middle part department symmetry fixed mounting and has first flange (201), the upper end fixed surface of metering tank (2) is connected with first closing cap (202), the upper end surface of first closing cap (202) is located middle part department fixed mounting and has speed reducer (203), the upper end fixed surface of speed reducer (203) installs driving motor (204), the upper end surface of first closing cap (202) is close to edge fixed mounting and throws material lid (205), the bottom surface of metering tank (2) is located middle part department fixed mounting and has metering pump (206), the fixed surface of metering pump (206) installs conveyer pipe (207).
4. The continuous production system of 2-methyltetrahydrofuran according to claim 3, wherein: the bottom surface of speed reducer (203) rotates and is connected with the gangbar, the surperficial equidistance fixed mounting of gangbar has the stirring rake.
5. The continuous production system of 2-methyltetrahydrofuran according to claim 4, wherein: the side surface of reation kettle (3) is close to middle part department symmetry fixed mounting and decides frame (301) of second, the side surface of reation kettle (3) is located one side fixed mounting that frame (301) was decided to the second has flange (302), the upper end fixed surface of reation kettle (3) installs second closing cap (303), the upper end surface of second closing cap (303) is close to middle part department fixed mounting and has buttcover plate (304), the fixed surface of buttcover plate (304) installs digging arm (305), the surface of digging arm (305) is close to the other end and rotates and be connected with fixed arm (306), the fixed surface of fixed arm (306) installs cylinder (307), the opposite side fixed surface of fixed arm (306) installs anticreep seat (308), the quantity of reation kettle (3) is provided with two, connect through the transmission pipe between reation kettle (3).
6. The continuous production system of 2-methyltetrahydrofuran according to claim 5, wherein: a first treatment tank (501) is fixedly arranged on the surface of the upper end of the circulating pump (5), a first communicating pipe (502) is fixedly arranged on the surface of the first processing tank (501) near the middle part, the upper end surface of the first treatment tank (501) is fixedly provided with a mounting frame (503), an electric controller (504) is fixedly arranged on the bottom end surface of the mounting frame (503), an electric heating rod (505) is fixedly arranged on the bottom end surface of the electric controller (504), the bottom end surface of the circulating pump (5) is fixedly provided with a second treatment tank (506), a second communicating pipe (507) is fixedly arranged at the position, close to the middle part, of the side surface of the second treatment tank (506), the bottom end surface of the inner side of the second treatment tank (506) is provided with a butt joint groove, the inner side surface of the second treatment tank (506) is embedded and connected with a lining cylinder (508), a filter screen (509) is fixedly arranged on the upper end surface of the lining cylinder (508), a conical through hole (5010) is arranged on the side surface of the inner lining cylinder (508) near the middle part, the side surface of the lining cylinder (508) is symmetrically and fixedly provided with fixing heads (5011) near the bottom edge, a thread groove is arranged on the surface of the fixed head (5011) near the edge, a thread head (5012) is spirally connected with the bottom end surface of the inner side of the lining cylinder (508), the bottom end surface of the thread head (5012) is fixedly provided with a twisting head (5013).
7. The continuous production system of 2-methyltetrahydrofuran according to claim 6, wherein: the utility model discloses a gas-liquid separator's (6) upper end fixed surface installs into pipe (601), the side surface of gas-liquid separator (6) is close to bottom department fixed mounting and has exit tube (602), the side surface of gas-liquid separator (6) is close to upper end edge fixed mounting and has outlet duct (603), the surface of outlet duct (603) is close to one end department fixed mounting and has automatically regulated valve (604), the opposite side fixed mounting that the surface of outlet duct (603) is located automatically regulated valve (604) has condenser (605), the surface of outlet duct (603) is close to other end department fixed mounting and has hydrogen compressor (606).
8. The continuous production system of 2-methyltetrahydrofuran according to claim 7, wherein: the gas bomb is characterized in that a flow meter (701) is fixedly mounted on the upper end surface of the gas bomb (7), a shunt pipe (702) is fixedly mounted on the upper end surface of the flow meter (701), an electric control valve (703) is mounted on the surface of the shunt pipe (702), and two tanks are arranged on the gas bomb (7).
9. A method for implementing the continuous production system of 2-methyltetrahydrofuran according to claim 8, comprising: the method comprises the following steps:
s1, putting reserved 2-methylfuran into a metering tank (2), putting the 2-methylfuran to be processed and a Raney nickel catalyst into a first reaction kettle (3), and then putting the 2-methylfuran to be processed and a palladium carbon catalyst into a second reaction kettle (3);
s2, opening the gas storage bottles (7) for storing nitrogen and hydrogen respectively to enable the mixture of the nitrogen and the hydrogen to activate and dry the catalyst, gradually exhausting air in the system device, and gradually increasing the output of the hydrogen in the process so as to continuously improve the hydrogen content in the reaction kettle (3)
S3, starting a circulating pump (5), filtering the pumped solvent by using a second treatment tank (506), heating the pumped solvent by matching with a first treatment tank (501), gradually raising the temperature inside the two groups of reaction kettles (3) to a certain temperature, keeping the temperature in a certain pressure environment, and simultaneously opening a metering pump (206) at the bottom of a metering tank (2), so that the stored 2-methylfuran can be pumped out at a certain speed to meet the preparation consumption supplement of the 2-methylfuran, thereby ensuring continuous preparation;
and S4, after the liquid entering the gas-liquid separator (6) reaches a certain liquid level, opening a valve body connected with the liquid and externally connected with a receiving tank for further rectifying the obtained liquid.
10. The continuous production method of 2-methyltetrahydrofuran according to claim 9, wherein: the circulating pump (5) is electrically connected with an external power supply.
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