CN116768699A - Preparation method of allyl alcohol - Google Patents
Preparation method of allyl alcohol Download PDFInfo
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- CN116768699A CN116768699A CN202310555175.8A CN202310555175A CN116768699A CN 116768699 A CN116768699 A CN 116768699A CN 202310555175 A CN202310555175 A CN 202310555175A CN 116768699 A CN116768699 A CN 116768699A
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- allyl alcohol
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- XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 68
- HVAMZGADVCBITI-UHFFFAOYSA-M pent-4-enoate Chemical compound [O-]C(=O)CCC=C HVAMZGADVCBITI-UHFFFAOYSA-M 0.000 claims abstract description 55
- 239000007864 aqueous solution Substances 0.000 claims abstract description 33
- 239000003054 catalyst Substances 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000010931 ester hydrolysis Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000011831 acidic ionic liquid Substances 0.000 abstract description 12
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 abstract description 6
- 238000000926 separation method Methods 0.000 abstract description 6
- 238000000746 purification Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 abstract description 3
- 238000003786 synthesis reaction Methods 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 21
- 238000006460 hydrolysis reaction Methods 0.000 description 15
- 239000000463 material Substances 0.000 description 11
- 239000002253 acid Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 8
- 230000007062 hydrolysis Effects 0.000 description 8
- 125000002091 cationic group Chemical group 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 238000005070 sampling Methods 0.000 description 6
- 230000002378 acidificating effect Effects 0.000 description 5
- 239000002608 ionic liquid Substances 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 239000003729 cation exchange resin Substances 0.000 description 3
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 239000012295 chemical reaction liquid Substances 0.000 description 2
- VILAVOFMIJHSJA-UHFFFAOYSA-N dicarbon monoxide Chemical compound [C]=C=O VILAVOFMIJHSJA-UHFFFAOYSA-N 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- MLHOXUWWKVQEJB-UHFFFAOYSA-N Propyleneglycol diacetate Chemical compound CC(=O)OC(C)COC(C)=O MLHOXUWWKVQEJB-UHFFFAOYSA-N 0.000 description 1
- 238000007171 acid catalysis Methods 0.000 description 1
- 238000005903 acid hydrolysis reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 229940023913 cation exchange resins Drugs 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 208000012839 conversion disease Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- -1 propylene ester Chemical class 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/09—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrolysis
- C07C29/095—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrolysis of esters of organic acids
-
- 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
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/0277—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature
- B01J31/0278—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature containing nitrogen as cationic centre
- B01J31/0281—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature containing nitrogen as cationic centre the nitrogen being a ring member
- B01J31/0284—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature containing nitrogen as cationic centre the nitrogen being a ring member of an aromatic ring, e.g. pyridinium
-
- 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
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/0277—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature
- B01J31/0292—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature immobilised on a substrate
- B01J31/0295—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides comprising ionic liquids, as components in catalyst systems or catalysts per se, the ionic liquid compounds being used in the molten state at the respective reaction temperature immobilised on a substrate by covalent attachment to the substrate, e.g. silica
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a preparation method of allyl alcohol, and belongs to the technical field of organic synthesis. The preparation method of the invention comprises the steps of introducing allyl acetate aqueous solution into FeCl filled solution 3 Heating in a fixed bed reactor of PBImim-PMO catalyst to perform ester hydrolysis reaction to obtain a product containing acetic acid and allyl alcohol. The method uses the immobilized acidic ionic liquid as a catalyst, so that the reaction can be carried out at higher temperature and pressure, the process has high reaction rate and conversion rate, the content of allyl acetate in the obtained product is less than or equal to 500ppm, and the subsequent purification and separation of allyl alcohol are facilitated. In addition, the preparation method has simple steps, can adapt to working conditions in different raw material concentration ranges, and the immobilized acidic ionic liquid catalyst can be separated from a reaction system, so that the reaction is continuous and the industrialization is convenient.
Description
Technical Field
The invention relates to the technical field of organic synthesis, in particular to a preparation method of allyl alcohol.
Background
Allyl alcohol is an important organic synthesis raw material, is mainly used for synthesizing 1, 4-butanediol, epichlorohydrin, glycerol, propylene ester, propylene ether and the like, and can be industrially applied to the production of products such as plasticizers, engineering plastics, polyethers, surfactants and the like.
At present, in the prior art, esters are generally adopted to carry out hydrolysis reaction in the presence of acid to prepare allyl alcohol, and the mechanism of acid hydrolysis of esters is as follows: under the catalysis of acid, the oxygen atom of carbonyl is protonated, the electropositivity of carbonyl carbon is enhanced, water molecules attack the carbonyl carbon, and the addition-elimination is carried out to generate carboxylic acid and alcohol. For example, japanese Showa electric company developed a technique for producing allyl alcohol by hydrolysis of allyl acetate in 1985 and disclosed the above method in China patent CN1759091A, the hydrolysis reaction using a cation exchange resin as a catalyst, but being limited to the use temperature of the cation exchange resin, the reaction was carried out at 80℃to result in a slower reaction rate; meanwhile, the subsequent separation of the method is complicated due to the azeotropic characteristic between the product and the raw material components. Chinese patent CN103119007a complements the use of base as hydrolysis catalyst but is less effective than acidic cation exchange resins.
Therefore, on the basis of the existing preparation process, how to improve the reaction rate of allyl acetate hydrolysis to produce allyl alcohol, make the reaction more sufficient and facilitate the subsequent separation of the product is one of the technical difficulties of realizing the efficient and continuous industrial production of allyl alcohol.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the preparation method of the allyl alcohol, which has simple steps, can react at higher temperature and pressure, greatly improves the reaction rate and conversion rate, has low allyl acetate content in the product, and is convenient for the subsequent separation of the product.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a process for the preparation of allyl alcohol comprising the steps of: introducing allyl acetate aqueous solution into FeCl 3 Heating to 120-150 ℃ in a fixed bed reactor of PBImim-PMO catalyst to carry out ester hydrolysis reaction to obtain a product containing acetic acid and allyl alcohol, wherein the reaction formula is as follows:
in a preferred embodiment of the present invention, the concentration of the allyl acetate aqueous solution is 20% to 80% by mass.
Further preferably, the mass concentration of the allyl acetate aqueous solution is 30% -70%.
As a preferred embodiment of the present invention, the allyl acetate aqueous solution is introduced with a mass space velocity of 3 to 10 (kg.multidot.h) -1 ) Catalyst/kg.
As a preferred embodiment of the present invention, the FeCl 3 The structural formula of the PBImim-PMO catalyst is shown as follows:
as a preferred embodiment of the present invention, the reaction pressure in the fixed bed reactor is 0.3 to 0.7MPa.
Compared with the prior art, the invention has the beneficial effects that:
the invention uses the immobilized acid ionic liquid FeCl 3 -PBImim-PMO asThe catalyst for allyl acetate hydrolysis improves the upper limit of the reaction temperature while maintaining the industrial fixed bed process, so that the hydrolysis reaction can be carried out at higher temperature and pressure, the reaction rate is accelerated, the reaction materials can flow through the fixed bed at a faster flow rate, the chemical equilibrium constant of the hydrolysis reaction is improved, the hydrolysis reaction is promoted, the reaction is more complete, the conversion rate is high, the allyl acetate content in the product is lower than 500ppm, and the subsequent purification and separation of allyl alcohol are facilitated. Meanwhile, the preparation method disclosed by the invention is simple in steps, can adapt to working conditions in different raw material concentration ranges, and the immobilized ionic liquid catalyst can be separated from a reaction system, so that the reaction is continuous, and the industrialization is facilitated.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
A process for the preparation of allyl alcohol comprising the steps of: allyl acetate aqueous solution with mass concentration of 20-80% is mixed with water in an amount of 3-10 (kg:. H) -1 ) Mass space velocity of catalyst/kg filled with FeCl 3 In a fixed bed reactor of PBImim-PMO catalyst, heating to 120-150 ℃ and carrying out ester hydrolysis reaction under the pressure of 0.3-0.7 Mpa to obtain a product containing acetic acid and allyl alcohol, wherein the reaction formula is as follows:
wherein FeCl 3 The structural formula of the PBImim-PMO catalyst is shown as follows:
example 1
A process for the preparation of allyl alcohol comprising the steps of:
preheating 20% mass concentration allyl acetate aqueous solution to about 120 ℃, and introducing FeCl filled with 3kg immobilized acidic ionic liquid 3 Fixed bed reactor of pbim-PMO catalyst (Φ25x25, 5000 mm), the reaction temperature is 120 ℃, the reaction pressure is 0.3Mpa, and the flow rate of the allyl acetate aqueous solution is controlled to be 30kg/h. After the materials at the outlet of the fixed bed reactor are stable, the allyl alcohol content in the product is 11.6%, the allyl acetate content is 78ppm and the conversion rate is 99.99% by sampling.
Example 2
A process for the preparation of allyl alcohol comprising the steps of:
preheating 30% mass concentration allyl acetate aqueous solution to about 120 ℃, and introducing FeCl filled with 3kg immobilized acidic ionic liquid 3 In a fixed bed reactor (Φ25x2.5, 5000 mm) of the PBImim-PMO catalyst, the reaction temperature was 120 ℃, the reaction pressure was 0.3MPa, and the flow rate of the allyl acetate aqueous solution was controlled to be 30kg/h. After the materials at the outlet of the fixed bed reactor are stable, the allyl alcohol content in the product is 17.4%, the allyl acetate content is 80ppm and the conversion rate is 99.99% by sampling.
Example 3
A process for the preparation of allyl alcohol comprising the steps of:
preheating allyl acetate aqueous solution with the mass concentration of 50% to about 130 ℃, and introducing FeCl filled with 3kg of immobilized acidic ionic liquid 3 In a fixed bed reactor (Φ25x2.5, 5000 mm) of the PBImim-PMO catalyst, the reaction temperature was 130 ℃, the reaction pressure was 0.45MPa, and the flow rate of the allyl acetate aqueous solution was controlled to be 15kg/h. After the material at the outlet of the fixed bed reactor was stabilized, the allyl alcohol content in the product was 29.1%, the allyl acetate content was 189ppm, and the conversion was 99.98%.
Example 4
A process for the preparation of allyl alcohol comprising the steps of:
preheating allyl acetate aqueous solution with 70% mass concentration to about 150 ℃, and introducing FeCl filled with 3kg of immobilized acidic ionic liquid 3 In a fixed bed reactor (Φ25x2.5, 5000 mm) of the PBImim-PMO catalyst, the reaction temperature was 150 ℃, the reaction pressure was 0.7MPa, and the flow rate of the allyl acetate aqueous solution was controlled to 9kg/h. After the materials at the outlet of the fixed bed reactor are stable, sampling and measuring the yieldThe allyl alcohol content in the product was 40.6%, the allyl acetate content was 274ppm, and the conversion was 99.97%.
Example 5
A process for the preparation of allyl alcohol comprising the steps of:
preheating 80% allyl acetate aqueous solution to about 150deg.C, introducing FeCl filled with 3kg immobilized acidic ionic liquid 3 In a fixed bed reactor (Φ25x2.5, 5000 mm) of the PBImim-PMO catalyst, the reaction temperature was 150 ℃, the reaction pressure was 0.7MPa, and the flow rate of the allyl acetate aqueous solution was controlled to 9kg/h. After the materials at the outlet of the fixed bed reactor are stable, the allyl alcohol content in the product is 46.4%, the allyl acetate content is 476ppm and the conversion rate is 99.95% by sampling.
As can be seen from a comparison of examples 1-5, the use of an immobilized acidic ionic liquid FeCl 3 The hydrolysis reaction of the allyl acetate catalyzed by the PBImim-PMO has good catalytic conversion efficiency in the raw material mass concentration range of 20-80%, and the allyl acetate content in the product is below 500 ppm. As can be seen from the product content data of the examples, the allyl acetate content in the product rapidly increases with the increase in the concentration of the reaction liquid, which is caused by two reasons: 1. the concentration of the reaction solution is increased, and the reactor reaches the maximum load; 2. the reaction products are increased, and the hydrolysis reverse reaction trend is increased. Along with the increase of the concentration of the allyl acetate aqueous solution, the reaction temperature and the reaction pressure are required to be correspondingly increased, the material flow rate is required to be reduced to increase the reaction contact time, and the concentration of the allyl acetate aqueous solution in industrial production by the method is preferably 30-70 percent according to the comprehensive energy consumption and efficiency.
Comparative example 1
A process for the preparation of allyl alcohol comprising the steps of:
the 30% mass concentration allyl acetate aqueous solution is preheated to about 80 ℃, and enters a fixed bed reactor (phi 25 x 2.5, 5000 mm) filled with 3kg of cationic acid resin, the reaction temperature is 80 ℃, the reaction pressure is 0.2Mpa, so as to ensure that the inside of the reactor is in liquid phase reaction, and the flow rate of the allyl acetate aqueous solution is controlled to be 25kg/h. After the material at the outlet of the fixed bed reactor was stabilized, the allyl alcohol content in the product was 17.0%, the allyl acetate content was 0.74% and the conversion was 97.53% by sampling.
Comparative example 2
A process for the preparation of allyl alcohol comprising the steps of:
the allyl acetate aqueous solution with the mass concentration of 70% is preheated to about 80 ℃, enters a fixed bed reactor (phi 25 x 2.5, 5000 mm) filled with 3kg of cationic acid resin, the reaction temperature is 80 ℃, the reaction pressure is 0.2Mpa, so as to ensure that the inside of the reactor is in liquid phase reaction, and the flow rate of the allyl acetate aqueous solution is controlled to be 5kg/h. After the material at the outlet of the fixed bed reactor was stabilized, the allyl alcohol content in the product was 39.6%, the allyl acetate content was 1.64% and the conversion was 97.66%.
As can be seen from a comparison of example 2 and comparative example 1, example 4 and comparative example 2, even if the flow rate of the allyl acetate aqueous solution is reduced and the residence time of the reactant in the cationic acidic resin is increased, the catalytic effect of the cationic acidic resin on allyl acetate is still inferior to that of the immobilized acidic ionic liquid FeCl 3 The pbim-PMO catalyst, using the immobilized acidic ionic liquid catalyst of the invention, has a higher conversion, which is characteristic in both high-concentration allyl acetate aqueous solutions and low-concentration allyl acetate aqueous solutions. The main reason for this difference is that: the hydrolysis reaction of the allyl acetate is an endothermic reaction, and the temperature is increased to promote the hydrolysis of the allyl acetate and accelerate the reaction rate. The upper limit of the use temperature of the cationic acid resin is 100-105 ℃, the optimum working temperature is about 80 ℃, and the acid ion liquid can be used at a higher temperature, and has more excellent acid catalysis property, so that the content of raw materials in the reaction liquid catalyzed by the immobilized acid ion liquid is lower, and the hydrolysis conversion rate is higher.
Comparative example 3
A process for the preparation of allyl alcohol comprising the steps of:
preheating 30% allyl acetate aqueous solution to about 80deg.C, and loading with 3kg immobilized acid ionic liquid FeCl 3 In a fixed bed reactor (Φ25×2.5, 5000 mm) of pbim-PMO catalyst, the reaction temperature was 80 ℃ and the reaction pressure was 0.2Mpa, to ensure a liquid phase reaction inside the reactor, the allyl acetate aqueous solution flow rate was controlled at 25kg/h. After the material at the outlet of the fixed bed reactor was stabilized, the allyl alcohol content of the product was 16.88%, the allyl acetate content was 0.89% and the conversion was 97.03% by sampling.
Comparative example 4
A process for the preparation of allyl alcohol comprising the steps of:
preheating an allyl acetate aqueous solution with the mass concentration of 70% to about 80 ℃, and entering a solution filled with 3kg of immobilized acidic ionic liquid FeCl 3 In a fixed bed reactor (Φ25×2.5, 5000 mm) of pbim-PMO catalyst, the reaction temperature was 80 ℃ and the reaction pressure was 0.2Mpa, to ensure a liquid phase reaction inside the reactor, the allyl acetate aqueous solution flow rate was controlled to 5kg/h. After the material at the outlet of the fixed bed reactor was stabilized, the allyl alcohol content in the product was 39.58%, the allyl acetate content was 1.75% and the conversion was 97.50%.
As can be seen from comparison of comparative examples 1 and 3 and comparative examples 2 and 4, the immobilized acidic ionic liquid FeCl is obtained under the conditions that other process parameters are the same and only the catalysts are different 3 The catalytic hydrolysis effect of the pbim-PMO catalyst and the cationic acidic resin catalyst on propylene acetate is comparable or even slightly lower than that of the cationic acidic resin catalyst. It can be seen that the invention uses the immobilized acid ionic liquid FeCl 3 The PBImim-PMO is used as a catalyst, the reaction conversion rate is effectively improved by controlling the reaction temperature, and the allyl acetate content in the product is lower than 500ppm, so that the subsequent purification and separation of allyl alcohol are facilitated.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (6)
1. A process for the preparation of allyl alcohol characterized by: the method comprises the following steps: introducing allyl acetate aqueous solution into FeCl 3 Heating to 120-150 ℃ in a fixed bed reactor of PBImim-PMO catalyst to carry out ester hydrolysis reaction to obtain a product containing allyl alcohol.
2. The method for producing allyl alcohol according to claim 1, wherein: the mass concentration of the allyl acetate aqueous solution is 20% -80%.
3. The method for producing allyl alcohol according to claim 1, wherein: the mass concentration of the allyl acetate aqueous solution is 30% -70%.
4. A process for the preparation of allyl alcohol according to any one of claims 1 to 3, characterized in that: the mass airspeed of the allyl acetate aqueous solution is 3 to 10 (kg is h) -1 ) Catalyst/kg.
5. The method for producing allyl alcohol according to claim 1, wherein: the FeCl 3 The structural formula of the PBImim-PMO catalyst is shown as follows:
6. the method for producing allyl alcohol according to claim 1, wherein: the reaction pressure in the fixed bed reactor is 0.3-0.7 Mpa.
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