CN117582896A - System and method for synthesizing 2, 2-di (2-furyl) propane - Google Patents
System and method for synthesizing 2, 2-di (2-furyl) propane Download PDFInfo
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- CN117582896A CN117582896A CN202311432027.3A CN202311432027A CN117582896A CN 117582896 A CN117582896 A CN 117582896A CN 202311432027 A CN202311432027 A CN 202311432027A CN 117582896 A CN117582896 A CN 117582896A
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- furyl
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- OFBSTYYRPIFDPM-UHFFFAOYSA-N 2,2-di-2-furylpropane Chemical compound C=1C=COC=1C(C)(C)C1=CC=CO1 OFBSTYYRPIFDPM-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 230000002194 synthesizing effect Effects 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 22
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 68
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims abstract description 64
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000006243 chemical reaction Methods 0.000 claims abstract description 35
- 239000006227 byproduct Substances 0.000 claims abstract description 27
- 239000000047 product Substances 0.000 claims abstract description 26
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 25
- 239000003054 catalyst Substances 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000000376 reactant Substances 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 27
- 101710134784 Agnoprotein Proteins 0.000 claims description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 238000003786 synthesis reaction Methods 0.000 abstract description 4
- 238000009776 industrial production Methods 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 239000000539 dimer Substances 0.000 description 5
- 239000013638 trimer Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- FZLHAQMQWDDWFI-UHFFFAOYSA-N 2-[2-(oxolan-2-yl)propan-2-yl]oxolane Chemical compound C1CCOC1C(C)(C)C1CCCO1 FZLHAQMQWDDWFI-UHFFFAOYSA-N 0.000 description 1
- 239000003377 acid catalyst Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- ITMCEJHCFYSIIV-UHFFFAOYSA-M triflate Chemical compound [O-]S(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-M 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
- C07D307/34—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D307/36—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to ring carbon atoms
-
- 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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/0033—Optimalisation processes, i.e. processes with adaptive control systems
-
- 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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/10—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing sonic or ultrasonic vibrations
-
- 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
- B01J8/06—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 in tube reactors; the solid particles being arranged in tubes
-
- 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
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00002—Chemical plants
- B01J2219/00004—Scale aspects
- B01J2219/00006—Large-scale industrial plants
-
- 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
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00002—Chemical plants
- B01J2219/00027—Process aspects
- B01J2219/00033—Continuous processes
-
- 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
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
-
- 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
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00162—Controlling or regulating processes controlling the pressure
Abstract
The invention belongs to the technical field of compound synthesis, and particularly relates to a system and a method for synthesizing 2, 2-di (2-furyl) propane, wherein the system comprises a fixed bed tubular reaction unit, a raw material unit and a reactant treatment unit; the fixed bed tubular reaction unit comprises a fixed bed tubular reactor and an ultrasonic generator, and the ultrasonic generator is arranged outside the fixed bed tubular reactor; a catalyst bed layer is arranged in the fixed bed tubular reactor, and the fixed bed tubular reactor is connected with a feed pipe and a discharge pipe; the raw material unit comprises a furan tank, an acetone tank, a byproduct tank and a nitrogen source; the furan tank, the acetone tank, the byproduct tank and the nitrogen source are respectively communicated with the feeding pipe through pipelines. The system and the method are used for synthesizing the 2, 2-di (2-furyl) propane, the reaction selectivity, the conversion rate and the product yield of the raw materials are high, and meanwhile, the continuous and large-scale industrial production can be realized, so that the method has strong technical advantages.
Description
Technical Field
The invention belongs to the technical field of compound synthesis, and particularly relates to a system and a method for synthesizing 2, 2-di (2-furyl) propane.
Background
2, 2-bis (2-furyl) propane, DFP for short, is an upstream product for the synthesis of 2, 2-bis (tetrahydrofuranyl) propane.
The current methods for synthesizing 2, 2-di (2-furyl) propane are mainly:
(1) U.S. patent No. 6194597B1 discloses a process for preparing 2, 2-bis (2-furyl) propane, which comprises using furan and acetone as raw materials, dropwise adding 37% hydrochloric acid at 0 ℃, then reacting at room temperature, diluting with one equivalent of n-hexane after the reaction is finished, neutralizing to neutrality with 10% sodium carbonate, drying the obtained product with an excessive amount of anhydrous sodium sulfate, and rectifying to obtain 2, 2-bis (2-furyl) propane with a product yield of 74%.
(2) The researchers at the institute of agriculture and university of Toronto, the university of America, were slowly dropped into a mixture of furan, ethanol and hydrochloric acid, reacted at 25℃for 18 hours, neutralized to neutrality with 5% sodium bicarbonate after the completion of the reaction, dried over anhydrous sodium sulfate, and then rectified to obtain 2, 2-bis (2-furyl) propane.
(3) CN105367523A discloses a method for synthesizing 2, 2-di (2-furyl) propane, which comprises the steps of reacting furan and acetone in the presence of a catalyst triflate to obtain 2, 2-di (2-furyl) propane, wherein the product yield can reach more than 89%.
(4) CN116237066A discloses yizhong solid strong acid catalyst and a method for synthesizing 2, 2-di (2-furyl) propane by using the catalyst, which can lead the yield of the 2, 2-di (2-furyl) propane product to reach more than 80 percent.
The yield of the product 2, 2-di (2-furyl) propane in the above synthesis method is not ideal.
Disclosure of Invention
The invention aims to provide a system and a method for synthesizing 2, 2-di (2-furyl) propane, which have higher reaction selectivity, conversion rate and product yield of raw materials, can realize continuous and large-scale industrial production, and have stronger technical advantages.
Specifically, the invention provides the following technical scheme:
a system for synthesizing 2, 2-di (2-furyl) propane comprises a fixed bed tubular reaction unit, a raw material unit and a reactant treatment unit;
the fixed bed tubular reaction unit comprises a fixed bed tubular reactor and an ultrasonic generator, and the ultrasonic generator is arranged outside the fixed bed tubular reactor;
a catalyst bed layer is arranged in the fixed bed tubular reactor, and the fixed bed tubular reactor is connected with a feed pipe and a discharge pipe;
the raw material unit comprises a furan tank, an acetone tank, a byproduct tank and a nitrogen source; the furan tank, the acetone tank, the byproduct tank and the nitrogen source are respectively communicated with the feeding pipe through pipelines.
In the invention, the byproducts refer to dimers and trimers generated by side reaction in the synthesis of 2, 2-di (2-furyl) propane by using furan and acetone.
Preferably, the reactant treatment unit comprises a liquid separating tank, a feed inlet of the liquid separating tank is communicated with the discharge pipe, and a top air outlet of the liquid separating tank is communicated with the feed pipe.
Preferably, the catalyst bed layer is provided with an AgNO which takes alumina as a carrier 3 And a catalyst in which Ag is an active component; the height-diameter ratio of the catalyst bed layer is 10-18:1-1.2.
Further preferably, the silver content (total silver element content) of the catalyst is 5 to 15wt%.
Further preferably, the AgNO 3 And Ag in a mass ratio of 27-33:67-73.
The invention also provides a method for synthesizing 2, 2-di (2-furyl) propane by adopting the system, which comprises the following steps:
s1, continuously introducing furan, acetone, byproducts and nitrogen into the fixed bed tubular reactor from a feed pipe, and reacting under the action of ultrasonic waves and a catalyst;
s2, continuously leading unreacted furan and acetone, main products 2, 2-di (2-furyl) propane, byproducts and nitrogen out of the fixed bed tubular reactor through a discharge pipe.
Preferably, the ultrasonic wave has a frequency of 43 to 47Hz and a power of 650 to 750W/Kmol (the raw material refers to the total molar amount of furan and acetone).
Preferably, the temperature of the reaction is 33-50 ℃, the pressure is 550-600 KPa.G, and the reaction space velocity is 2.5-3 h -1 (the reaction space velocity is the total volume of furan and acetone treated by the catalyst per unit volume per unit time, and the unit is m 3 /(m 3 Catalyst h), which can be simplified as h -1 )。
Preferably, the feeding mole ratio of furan to acetone is 2.1-2.5:1-1.2; the feeding mole ratio of the acetone to the byproducts is 1-1.2:0.05-0.1.
Preferably, the nitrogen is a stabilizer, and the concentration of the nitrogen in the feed pipe and the discharge pipe is 80% (vol) or more.
Preferably, the method further comprises the following steps: furan, acetone, main product 2, 2-di (2-furyl) propane, byproducts and nitrogen which are led out from the fixed bed tubular reactor enter a liquid separating tank; the temperature of the liquid separating tank is above 55 ℃ and the pressure is below 80KPa.A (the temperature and the pressure ensure that furan and acetone in the liquid separating tank exist in a gas form);
the upper gas in the liquid separating tank is furan, acetone and nitrogen, and the furan, the acetone and the nitrogen are condensed into liquid state by a condenser and then sent into a feeding pipe for recycling;
the lower liquid in the liquid separating tank is the main product 2, 2-di (2-furyl) propane and byproducts, and the main product 2, 2-di (2-furyl) propane is separated by sending the main product to a rectifying unit.
The invention provides a system and a method for synthesizing 2, 2-di (2-furyl) propane, which have the beneficial effects that:
the reaction selectivity of the raw materials can reach more than 96%, the single pass conversion rate can reach more than 98%, the product yield can reach more than 95%, and meanwhile, the continuous and large-scale industrial production can be realized, so that the method has strong technical advantages.
Detailed Description
The invention is illustrated by the following preferred embodiments. It will be appreciated by those skilled in the art that the examples are provided for illustration only and are not intended to limit the scope of the invention.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention are clearly and completely described below, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention. The specific techniques or conditions are not identified in the examples and are described in the literature in this field or are carried out in accordance with the product specifications. The reagents or equipment used were conventional products available for purchase by regular vendors without the manufacturer's attention.
Example 1
Example 1 provides a system for synthesizing 2, 2-bis (2-furyl) propane comprising a fixed bed tubular reaction unit and a feedstock unit;
the fixed bed tubular reaction unit comprises a fixed bed tubular reactor and an ultrasonic generator, and the ultrasonic generator is arranged (externally hung) outside the fixed bed tubular reactor;
a catalyst bed layer is arranged in the fixed bed tubular reactor, and the fixed bed tubular reactor is connected with a feed pipe and a discharge pipe;
the raw material unit comprises a furan tank, an acetone tank, a byproduct tank and a nitrogen source; the furan tank, the acetone tank, the byproduct tank and the nitrogen source are respectively communicated with the feeding pipe through pipelines.
Specifically, the specification of the fixed bed tubular reactor is phi 40 multiplied by 5mm, and the length of the tube is 4000mm; the tube shell passes through the refrigerant; the whole reactor material is SS30403. The reactor is provided with a liquid level meter for observing the tube side liquid level. The upper and lower parts of the tube are respectively provided with a spring support, the maximum end of the spring is 50mm away from the tube orifice, and the upper and lower parts are respectively provided with a section of alumina porcelain balls with the height of 100mm, and the diameter phi is 5mm.
Specifically, the system also comprises a liquid separating tank, wherein a feed inlet of the liquid separating tank is communicated with the discharge pipe, and a top air outlet is communicated with the feed pipe.
Specifically, the catalyst bed layer is provided with a catalyst bed layer which takes honeycomb briquette-shaped activated alumina as a carrier (the size is phi 5 multiplied by 10mm, and the specific surface area is more than or equal to 20m 2 /m 3 )、AgNO 3 And Ag is a catalyst of active components, wherein the active components are fixed on the surface of a carrier by adopting a method of dipping and then sintering; the height-to-diameter ratio of the catalyst bed layer is 14:1.
Specifically, the silver content of the catalyst was 7.22wt%.
Specifically, the AgNO 3 And Ag in a mass ratio of 30:70.
Specifically, the discharging pipe is in an inverted U shape, so that the liquid level in the fixed bed tubular reactor in the reaction process is ensured to be basically consistent with the height of a discharging hole of the fixed bed tubular reactor, and a liquid seal effect is formed.
Example 1 also provides a method for synthesizing 2, 2-bis (2-furyl) propane using the above system, comprising the steps of:
1) Replacing air in the fixed bed tubular reactor with nitrogen;
2) After the nitrogen replacement is finished, injecting byproducts (dimer and trimer) into the fixed bed tubular reactor to a liquid level of 50-60%;
3) Continuously introducing furan, acetone, byproducts and nitrogen into the fixed bed tubular reactor from a feed pipe, and reacting under the action of ultrasonic waves and a catalyst;
4) Continuously guiding unreacted furan and acetone, main products 2, 2-di (2-furyl) propane, byproducts and nitrogen out of the fixed bed tubular reactor from a discharge pipe, and entering a liquid separating tank; the temperature in the liquid separating tank is 60 ℃ and the pressure is 80KPa.
The upper gas in the liquid separating tank is furan, acetone and nitrogen, and is circularly fed into the feeding pipe through the axial flow compressor;
the lower liquid in the liquid separating tank is the main product 2, 2-di (2-furyl) propane and byproducts, and the main product 2, 2-di (2-furyl) propane and byproducts dimer and trimer are separated out by sending the main product to a rectifying unit.
Specifically, the ratio of the main raw material furan to the acetone is 2.1:1 (mol); the ratio of acetone to byproducts (dimer, trimer) was 1:0.05. N in feed pipe and discharge pipe 2 The concentration is maintained at 80% by volume or more.
Specifically, the reaction heat is taken away by the coolant of the shell side, the reaction temperature is kept between 40 and 42 ℃, the reaction pressure is 555KPa.G, and the reaction space velocity is 3h -1 The frequency of the ultrasonic generator is controlled at 47Hz, the power is set at 730W/Kmol of the raw material, the single pass conversion rate of the raw material can reach 98 percent under the condition, the reaction selectivity of the raw material can reach 96 percent, and the product yield reaches 95 percent.
Comparative example 1
Compared with example 1, the only difference is that: the reaction air speed is reduced to 1.8h -1 . As a result, the yield of by-product dimer increased to 10%; the yield of trimer increased by 60% to 0.44%.
Comparative example 2
Compared with example 1, the only difference is that: the reaction space velocity is increased to 3.5h -1 . As a result, although the selectivity was improved to 97% or more, the conversion was rapidly reduced to 50% or less.
Comparative example 3
Compared with example 1, the only difference is that: the reaction pressure is lower than 450KPa.G or the reaction temperature is higher than 60 ℃. As a result, the raw materials of furan and acetone are largely vaporized, the reaction is difficult to carry out, the conversion rate is rapidly reduced, and the byproducts are increased.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A system for synthesizing 2, 2-di (2-furyl) propane, which is characterized by comprising a fixed bed tubular reaction unit, a raw material unit and a reactant treatment unit;
the fixed bed tubular reaction unit comprises a fixed bed tubular reactor and an ultrasonic generator, and the ultrasonic generator is arranged outside the fixed bed tubular reactor;
a catalyst bed layer is arranged in the fixed bed tubular reactor, and the fixed bed tubular reactor is connected with a feed pipe and a discharge pipe;
the raw material unit comprises a furan tank, an acetone tank, a byproduct tank and a nitrogen source; the furan tank, the acetone tank, the byproduct tank and the nitrogen source are respectively communicated with the feeding pipe through pipelines.
2. The system for synthesizing 2, 2-bis (2-furyl) propane according to claim 1, wherein the reactant treatment unit comprises a knock-out pot having a feed inlet in communication with the discharge pipe and a top outlet in communication with the feed pipe.
3. The system for synthesizing 2, 2-di (2-furyl) propane according to claim 1 or 2, wherein the catalyst bed is provided with an alumina-based AgNO 3 And a catalyst in which Ag is an active component; the height-diameter ratio of the catalyst bed layer is 10-18:1-1.2.
4. A system for synthesizing 2, 2-bis (2-furyl) propane according to claim 3, wherein the catalyst has a silver content of 5 to 15wt%.
5. The system for synthesizing 2, 2-di (2-furyl) propane according to claim 3 or 4, wherein the AgNO 3 And Ag in a mass ratio of 27-33:67-73.
6. A method of synthesizing 2, 2-bis (2-furyl) propane using the system of any one of claims 1-5, comprising the steps of:
s1, continuously introducing furan, acetone, byproducts and nitrogen into the fixed bed tubular reactor from a feed pipe, and reacting under the action of ultrasonic waves and a catalyst;
s2, continuously leading unreacted furan and acetone, main products 2, 2-di (2-furyl) propane, byproducts and nitrogen out of the fixed bed tubular reactor through a discharge pipe.
7. The method for synthesizing 2, 2-di (2-furyl) propane according to claim 6, wherein the ultrasonic wave has a frequency of 43-47 Hz and a power of 650-750W/Kmol of raw material.
8. The method for synthesizing 2, 2-di (2-furyl) propane according to claim 6 or 7, wherein the reaction temperature is 33-50 ℃, the pressure is 550-600 KPa. G, and the reaction space velocity is 2.5-3 h -1 。
9. The method of synthesizing 2, 2-bis (2-furyl) propane according to any one of claims 6 to 8, wherein the feed molar ratio of furan to acetone is 2.1 to 2.5:1 to 1.2; the feeding mole ratio of the acetone to the byproducts is 1-1.2:0.05-0.1.
10. The method of synthesizing 2, 2-di (2-furyl) propane according to any one of claims 6-9, further comprising the steps of: furan, acetone, main product 2, 2-di (2-furyl) propane, byproducts and nitrogen which are led out from the fixed bed tubular reactor enter a liquid separating tank; the temperature of the liquid separating tank is above 55 ℃ and the pressure is below 80KPa.A;
the upper gas in the liquid separating tank is furan, acetone and nitrogen, and the furan, the acetone and the nitrogen are sent into a feed pipe for recycling;
the lower liquid in the liquid separating tank is the main product 2, 2-di (2-furyl) propane and byproducts, and the main product 2, 2-di (2-furyl) propane is separated by sending the main product to a rectifying unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311432027.3A CN117582896A (en) | 2023-10-31 | 2023-10-31 | System and method for synthesizing 2, 2-di (2-furyl) propane |
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| CN202311432027.3A CN117582896A (en) | 2023-10-31 | 2023-10-31 | System and method for synthesizing 2, 2-di (2-furyl) propane |
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