CN106631689B - A kind of preparation method of sec-butyl alcohol - Google Patents
A kind of preparation method of sec-butyl alcohol Download PDFInfo
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- CN106631689B CN106631689B CN201510729540.8A CN201510729540A CN106631689B CN 106631689 B CN106631689 B CN 106631689B CN 201510729540 A CN201510729540 A CN 201510729540A CN 106631689 B CN106631689 B CN 106631689B
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- 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
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- 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
- B01J31/06—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing polymers
- B01J31/08—Ion-exchange resins
- B01J31/10—Ion-exchange resins sulfonated
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Abstract
The present invention provides a kind of preparation method of sec-butyl alcohol, high temperature high pressure process is carried out by being placed in low-carbon alcohol solution suitable for the strong-acid cation-exchange resin catalyst for being catalyzed sec-Butyl Acetate hydrolysis, it is catalyzed sec-Butyl Acetate hydrolysis again and prepares sec-butyl alcohol, feed stock conversion can be greatly improved by carrying out pretreated strong-acid cation-exchange resin using method of the invention, it is also able to maintain the catalytic activity and product selectivity of higher level simultaneously, entire technical process is easy to operate, environmentally protective.
Description
Technical field
The present invention relates to a kind of preparation methods of sec-butyl alcohol, relate in particular to a kind of in acid cation exchange resin work
Under, method that sec-butyl alcohol is prepared by sec-Butyl Acetate hydrolysis.
Background technique
Sec-butyl alcohol can be used as solvent, make cosolvent with methanol, can be used as the component for improving octane number, is also used as emulsification
Agent, paint stripper, dehydrating agent, dye dispersant, industrial detergent etc.；It is also used to produce dressing agent, plasticizer, herbicide etc.；But
Most important application is to produce methyl ethyl ketone through catalytic dehydrogenation, accounts for about the 90% of total flow.
The method of conventional synthesis sec-butyl alcohol is to generate sec-butyl alcohol with n-butylene hydration, mainly there is sulfuric acid indirect hydration, resin
It is catalyzed direct hydration and 3 kinds of heteropoly acid catalysis direct hydration.(1) sulfuric acid indirect hydration: the sulfuric acid absorption for being 50% or so with concentration
The mixing C 4 fraction of pretreated n-butene generates butyl sulfuric ester, then hydrolyzes to obtain sec-butyl alcohol aqueous solution.But due to making
With sulfuric acid, equipment seriously corroded, plant investment is larger, need to consume a large amount of sulphur bronsted lowry acids and bases bronsted lowries, and the three wastes are more, and n-butene unit consumption is higher.(2)
Resin catalysis direct hydration: strong-acid cation-exchange resin catalyst is used.But the method requires height to raw material n-butene, just
Conversion per pass is low for butene reaction.(3) heteropoly acid catalysis direct hydration: using heteropolyacid catalyst, and main ingredient is molybdophosphate,
And organo-metallic compound additive is added, and 200 DEG C -230 DEG C of reaction temperature, reaction pressure 19.0MPa.N-butene conversion per pass
Rate 25%-30%.But this method reaction pressure is high, the conversion ratio of n-butene is relatively low.
The shortcomings that in order to overcome traditional handicraft, CN200810016495 propose a kind of n-butene direct hydration continuous production
The process of sec-butyl alcohol, in the presence of strong acid ion exchange resin catalyst, fresh n-butene raw material and circulation n-butene
It is mixed into hydration reactor and carries out hydration reaction, separated subsequently into crude product separative unit, add n-butene purification
Unit, the unreacted n-butene isolated by crude product separative unit, a part are back to hydration reaction as circulation n-butene
Device continues to participate in hydration reaction, and another part is sent to n-butene refined unit and refined, and removes butane, recycles n-butene, after
It is continuous to be used as fresh n-butene raw material.
CN97116406 proposes a kind of method of low-carbon alkene direct hydration continuous production low-carbon alcohols, strong-acid type sun from
In the presence of sub-exchange resin catalyst, after the raw material hydrocarbon containing low-carbon alkene is mixed with raw water and recycle hydrocarbons, into main reaction
Device, subsequently into crude product separator, it is characterised in that be additionally provided with auxiliary reactor after crude product separator and mutually separate
Device, the unreacted the hydrocarbon component a part containing low-carbon alkene in main reactor come out by crude product separator is as circulation
Hydrocarbon returns to main reactor, after another part is mixed with deionized water, into further progress hydration reaction in auxiliary reactor, reaction
Product, which enters in phase separator, to be separated, and separated aqueous solution of alcohol out, the raw water as main reactor enters main reactor,
Separated hydrocarbon phase discharger.
The process route of sec-butyl alcohol made above has the disadvantages that 1) conversion per pass is low, less than 10%；2) to raw material
N-butene concentration requires height, could use after needing concentrate；3) reaction temperature is high, and 140 DEG C or more, energy consumption is high.
CN102659514A proposes a kind of method of sec-Butyl Acetate catalyzing hydrolysis production sec-butyl alcohol, with sec-Butyl Acetate
For raw material, a continuous catalysis hydrolysis is fixed, catalyst uses commercially available styrene type cation exchange resin catalyst, dress
It fills out in the calandria type fixed bed continuous pipe of series connection, the calandria type fixed bed series connection includes multiple duplicate shell and tubes
Reactor, raw material sec-Butyl Acetate and water enter shell and tube reactor, and continuous catalysis hydrolysis generates under the action of catalyst
Sec-butyl alcohol crude product, then high-purity sec-butyl alcohol is made through refining.The high conversion rate of method production sec-butyl alcohol of the invention, and can mention
The application range of high sec-Butyl Acetate improves the added value of sec-Butyl Acetate.But this method complex technical process, energy consumption are high.
CN102838450A proposes a kind of method using catalyzing cation exchange resin synthesis sec-butyl alcohol, secondary with acetic acid
Butyl ester and methanol are raw material, and transesterification synthesizes sec-butyl alcohol under cation exchange resin effect, and the conversion ratio of sec-butyl acetate can
Up to 35%-50%.Mild with reaction condition, small to equipment corrosiveness, selectivity is high, and catalyst activity is high, reusable
The advantages that.A kind of method that CN102731250A proposes synthesis sec-butyl alcohol passes through ester using sec-Butyl Acetate and methanol as raw material
Exchange production sec-butyl alcohol, by-product are methyl acetate, and the yield of sec-butyl alcohol reaches 50%-90%.Zhong Ding is prepared with n-butylene hydration method
Alcohol is compared, and reaction rate is fast, high conversion rate, selectivity is high, reaction condition is mild, small to the corrosion of equipment, and by-product acetic acid
Methyl esters is also a kind of important raw material of industry.CN102875328A proposes a kind of catalytic distillation of ester-interchange method synthesis sec-butyl alcohol
Technique and its production equipment, process flow are as follows: raw material sec-Butyl Acetate, methanol are respectively from the top of the conversion zone of catalytic rectifying tower
Enter with lower part, two kinds of raw materials occur ester exchange reaction in conversion zone and carry out vapour under the catalytic action of cation exchange resin
Liquid mass transfer realizes that continuous catalyzing rectifying process, this method use cation exchange resin for catalyst and catalytic rectification process, can
Continuous operation, simplification of flowsheet, avoid catalyst in the recycling and tower of alkali salt catalyst and are easy to the problems such as crystallizing precipitation,
Have the characteristics that low energy consumption, material consumption is low, reaction conversion ratio is high, stable product quality.
In the above-mentioned methods there is the conversion ratio of sec-butyl acetate is low, there is the shortcomings that by-product methyl acetate generation.
Li Fengyun is catalyst using heteropoly acid " synthesizing sec-butyl alcohol using heteropoly acid " in a text, anhydrous glacial acetic acid and
N-butene addition reaction generates sec-Butyl Acetate, and then sec-Butyl Acetate hydrolysis generates sec-butyl alcohol, hydrolyzes predominantly direct
Add water, hydrolyzes in acid condition.This method makes butylene produce sec-butyl alcohol by indirect method, has widened sec-Butyl Acetate
Application market.But the disadvantages of this method has conversion ratio low using heteropoly acid as catalyst, and by-product is more, and hydrolysis is not thorough needs
It solves.
Wang Ruoyu etc. is in " sec-Butyl Acetate adds hydrogen to prepare sec-butyl alcohol " text, using sec-Butyl Acetate as raw material, CuO/
Al2O3For hydrogenation catalyst, catalytic hydrogenation prepares sec-butyl alcohol.At 265 DEG C of reaction temperature, reaction pressure 8.0MPa, air speed 0.2h-1, under conditions of hydrogen ester the mass ratio of the material 20, sec-Butyl Acetate conversion ratio is 98.16%, and sec-butyl alcohol is selectively 20.48%, butanol
Selectivity is 93.37%, ethanol selectivity 88.81%.Compared with existing sec-butyl alcohol technology, there is sec-butyl alcohol yield height, energy consumption
It is low, process is short, process cleans and converts the advantages such as the ethyl alcohol of high value for the carbinol derivatives acetic acid of low value.But it is this
Method sec-butyl alcohol is selectively low, and only 20.48%.
Summary of the invention
To solve the problems, such as that sec-butyl alcohol preparing technique process process complexity, conversion ratio and selectivity are low in the prior art, this
Invention proposes a kind of method for preparing sec-butyl alcohol, first carries out low-carbon alcohols pretreatment to strong-acid cation-exchange resin, then be with it
Catalyst sec-Butyl Acetate hydrolysis prepares sec-butyl alcohol, and with simple process, low energy consumption, conversion ratio, selectivity and product are received
The advantages that rate is high.
Technical purpose of the invention is achieved through the following technical solutions:
A kind of preparation method of sec-butyl alcohol, comprising the following steps:
1. removing the oxygen in low-carbon alcohols and deionized water in advance, strong-acid cation-exchange resin catalyst is placed in low-carbon alcohols
Aqueous solution in, be put into closed container and be heated under 100 DEG C ~ 250 DEG C self-generated pressures processing 8 ~ for 24 hours；
The low-carbon alcohols are at least one of the alcohol of C1 ~ C4；
2. the strong-acid cation-exchange resin catalyst for taking step to be 1. modified is placed in continuous fixed bed stainless steel reactor
In, it sec-Butyl Acetate and water is passed through to be hydrolyzed in reactor prepares sec-butyl alcohol.
Further, the low-carbon alcohols are selected from methanol, ethyl alcohol, propyl alcohol, isopropanol, n-butanol, the tert-butyl alcohol, sec-butyl alcohol and different
At least one at least one of butanol, more preferably propyl alcohol, isopropanol, n-butanol, the tert-butyl alcohol, sec-butyl alcohol and isobutanol
Kind, most preferably sec-butyl alcohol.
Further, the volumetric concentration of alcohol is 0.5% ~ 20%, preferably 1% ~ 10% in the aqueous solution of the low-carbon alcohols, low-carbon
The aqueous solution of alcohol and the mixed volume ratio of strong-acid cation-exchange resin are (5 ~ 15): 1, preferably (5-10): 1.
To strong-acid cation-exchange resin in the process of processing, used solution have to pass through deoxygenation processing,
It additionally should ensure that in treatment fluid without containing metal ion, especially iron.
Further, the strong-acid cation-exchange resin refer to can be catalyzed sec-Butyl Acetate generate sec-butyl alcohol resin urge
Agent may be applicable to the II type strong-acid cation-exchange resin of DNW- prepared in technical solution of the present invention, such as the present invention
Catalyst can also be obtained by purchase.
Further, step 1. in the temperature that heats be preferably 100 DEG C ~ 150 DEG C, the time of heat treatment is preferably
12~24h。
Further, step 1. in the closed container that uses for the anti-of all kinds of inert material substrates suitable for hydro-thermal reaction
Device is answered, such as the container of enamel, glass, ceramics or tetrafluoroethene substrate.
Further, step 2. described in sec-Butyl Acetate hydrolysis Shi Shuiyu sec-Butyl Acetate molar ratio be (2 ~ 10):
1, preferably (2 ~ 5): 1, the liquid quality air speed of sec-Butyl Acetate is 0.5h-1~3.0h-1, preferably 0.5h-1-1.5h-1, reaction
Temperature be 100 DEG C -150 DEG C, preferably 100 DEG C -120 DEG C, reaction pressure 0.5MPa-5.0MPa, preferably 0.5MPa-
2.5MPa。
Further, 2. step generates the mixture of sec-butyl alcohol and acetic acid after middle sec-Butyl Acetate hydrolyzes, and obtains after separation
Sec-butyl alcohol.
Beneficial effects of the present invention:
(1) simple process of the invention, reaction condition is mild, convenient for operation, it is easy to accomplish industrialization.
(2) present invention is used as catalyst using low-carbon alcohols treated strong-acid cation-exchange resin, and catalytic activity is high, original
Material conversion ratio, product selectivity significantly improve, therefore entire technical process is environmentally protective technique.
Specific embodiment
Following non-limiting embodiments can with a person of ordinary skill in the art will more fully understand the present invention, but not with
Any mode limits the present invention.
Embodiment 1
(1) preparation of II type strong-acid cation-exchange resin of DNW-:
There are many preparation method of II type heatproof strong-acid cation-exchange resin catalyst of DNW-, according to side in the prior art
The resin catalyst of method preparation may be applicable to the present invention, resin catalyst in the present embodiment using polymerization, extracting, chlorination,
Sulfonation and active group stabilize the preparation of five steps, and specific as follows: polymerization obtains styrene-divinylbenzene copolymer microballoon, are swollen,
By after swelling copolymer and benzene be blended in 180 DEG C, stirring extracting processing 16h under 2.0MPa, it is cooling, benzene is discharged, then will copolymerization
Object is placed in dehydrated alcohol extracting under similarity condition and handles, and washing successively carries out chlorination, sulfonation, work to copolymer after purification
Property group stabilize after, obtain II type heatproof strong-acid cation-exchange resin catalyst of DNW-.
(2) pretreatment of II type strong-acid cation-exchange resin of DNW-:
Isopropanol, sec-butyl alcohol and deionized water are subjected to deoxygenation processing in advance, match preparing isopropanol and sec-butyl alcohol volume fraction
It is 5% low-carbon mixed alkoxide solution, II type strong-acid cation-exchange resin of DNW- is placed in above-mentioned low-carbon mixed alkoxide solution,
It is put into enamelled vessel.Low-carbon mixed alkoxide solution and II type strong-acid cation-exchange resin volume ratio of DNW- are 5:1, certainly at 100 DEG C
8h is handled under raw pressure.
(3) catalyst preparation sec-butyl alcohol is done with pretreated II type strong-acid cation-exchange resin of DNW-:
Take above-mentioned pretreated catalyst to be fitted into the stainless steel reactor of Φ 18mm × 1200mm, reactor head and
Bottom, is respectively charged into the quartz sand that diameter is Φ 0.5mm ~ 1.2mm, and reactor after the installation is completed, is replaced three times, and gas with nitrogen
Close pass the test.It is passed through sec-Butyl Acetate and reaction is hydrolyzed in water, wherein the molar ratio of water and sec-Butyl Acetate is 5:1；Vinegar
The liquid quality air speed of the secondary butyl ester of acid is 1.0h-1；Reaction temperature is 120 DEG C；Reaction pressure is 2.5MPa, is taken at regular intervals
Sample analysis, calculates conversion ratio and selectivity.
Embodiment 2
In addition to replacing isopropanol and sec-butyl alcohol in (2) with ethyl alcohol and sec-butyl alcohol, other conditions are same as Example 1.
Embodiment 3
In addition to replacing isopropanol and sec-butyl alcohol in (2) with ethyl alcohol and isopropanol, other conditions are same as Example 1.
Embodiment 4
In addition to replacing isopropanol and sec-butyl alcohol in (2) with sec-butyl alcohol, other conditions are same as Example 1.
Embodiment 5
In addition to replacing isopropanol and sec-butyl alcohol in (2) with isopropanol, other conditions are same as Example 1.
Embodiment 6
In addition to replacing isopropanol and sec-butyl alcohol in (2) with methanol and isopropanol, other conditions are same as Example 1.
Embodiment 7
In addition to replacing isopropanol and sec-butyl alcohol in (2) with methanol and sec-butyl alcohol, other conditions are same as Example 1.
Embodiment 8
In addition to replacing low-carbon mixed alkoxide solution in (2) with 5% methanol, other conditions are same as Example 1.
Embodiment 9
Except the concentration of isopropanol and sec-butyl alcohol is changed into 0.5% and 9.5%, other conditions and 1 phase of embodiment respectively in (2)
Together.
Embodiment 10
Except the concentration of isopropanol and sec-butyl alcohol is changed into 9.5% and 0.5%, other conditions and 1 phase of embodiment respectively in (2)
Together.
Embodiment 11
Except the concentration of isopropanol and sec-butyl alcohol is changed into 0.5% and 0.5%, other conditions and 1 phase of embodiment respectively in (2)
Together.
Embodiment 12
Except low-carbon mixed alkoxide solution and II type strong-acid cation-exchange resin volume ratio of DNW- are changed to 10:1 in (2), in advance
Treatment conditions are changed to handle for 24 hours under 150 DEG C and self-generated pressure, and other conditions are same as Example 1.
Embodiment 13
Except low-carbon mixed alkoxide solution and II type strong-acid cation-exchange resin volume ratio of DNW- are changed to 15:1 in (2), in advance
Treatment conditions are changed to handle 12h under 150 DEG C and self-generated pressure, and other conditions are same as Example 1.
Comparative example 1
II strong-acid cation-exchange resin of DNW- of step (1) preparation in embodiment 1 is directlyed adopt as catalyst
Sec-Butyl Acetate hydrolysis, hydrolysis condition is the same as step (3) in embodiment 1.
Each embodiment and comparative example catalysis sec-Butyl Acetate hydrolysis prepare conversion ratio and the sec-butyl alcohol selection of sec-butyl alcohol reaction
Property is shown in Table 1.II strong-acid cation-exchange resin of DNW- is used into preprocess method of the invention it can be seen from data in table 1
Sec-Butyl Acetate hydrolysis is catalyzed after being modified again, sec-Butyl Acetate conversion ratio significantly improves.
Each embodiment of table 1. and comparative example catalytic result
Claims (10)
1. a kind of preparation method of sec-butyl alcohol, comprising the following steps:
1. removing the oxygen in low-carbon alcohols and deionized water in advance, strong-acid cation-exchange resin catalyst is placed in the water of low-carbon alcohols
In solution, it is put into closed container and is heated under 100 DEG C ~ 250 DEG C self-generated pressures processing 8 ~ for 24 hours；
The low-carbon alcohols are at least one of the alcohol of C1 ~ C4；
It, will 2. the strong-acid cation-exchange resin catalyst for taking step to be 1. modified is placed in continuous fixed bed stainless steel reactor
Sec-Butyl Acetate and water, which are passed through to be hydrolyzed in reactor, prepares sec-butyl alcohol；
The catalyst is II type strong-acid cation-exchange resin catalyst of DNW-.
2. the preparation method of sec-butyl alcohol according to claim 1, it is characterised in that: the low-carbon alcohols be selected from methanol, ethyl alcohol,
At least one of propyl alcohol, isopropanol, n-butanol, the tert-butyl alcohol, sec-butyl alcohol and isobutanol.
3. the preparation method of sec-butyl alcohol according to claim 2, it is characterised in that: the low-carbon alcohols are selected from propyl alcohol, isopropyl
At least one of alcohol, n-butanol, the tert-butyl alcohol, sec-butyl alcohol and isobutanol.
4. the preparation method of sec-butyl alcohol according to claim 3, it is characterised in that: the low-carbon alcohols are sec-butyl alcohol.
5. the preparation method of sec-butyl alcohol according to claim 1, it is characterised in that: alcohol in the aqueous solution of the low-carbon alcohols
Volumetric concentration is 0.5% ~ 20%.
6. the preparation method of sec-butyl alcohol according to claim 5, it is characterised in that: alcohol in the aqueous solution of the low-carbon alcohols
Volumetric concentration is 1% ~ 10%.
7. the preparation method of sec-butyl alcohol according to claim 1, it is characterised in that: step 1. in low-carbon alcohols aqueous solution with
The mixed volume ratio of strong-acid cation-exchange resin is 5 ~ 15:1.
8. the preparation method of sec-butyl alcohol according to claim 1, it is characterised in that: 1. the middle temperature heated is step
100℃~150℃。
9. the preparation method of sec-butyl alcohol according to claim 1, it is characterised in that: 1. the middle time heated is step
12~24h。
10. the preparation method of sec-butyl alcohol according to claim 1, it is characterised in that: step 2. described in sec-Butyl Acetate
The molar ratio for hydrolyzing Shi Shuiyu sec-Butyl Acetate is 2 ~ 10:1, and the liquid quality air speed of sec-Butyl Acetate is 0.5h-1~3.0h-1,
Reaction temperature is 100 DEG C ~ 150 DEG C, and reaction pressure is 0.5MPa ~ 5.0MPa.
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| CN109678670B (en) * | 2017-10-19 | 2022-06-07 | 中国石油化工股份有限公司 | Method for preparing sec-butyl alcohol |
| CN108017507A (en) * | 2017-12-04 | 2018-05-11 | 福州大学 | A kind of method of fixed bed-reactive distillation Joint Production high-purity sec-butyl alcohol |
| CN115894171B (en) * | 2022-11-17 | 2024-04-16 | 凯瑞环保科技股份有限公司 | Method for preparing sec-butyl alcohol by hydrogenating sec-butyl acetate |
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Effective date of registration: 20230828 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: Sinopec (Dalian) Petrochemical Research Institute Co.,Ltd. Address before: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee before: CHINA PETROLEUM & CHEMICAL Corp. Patentee before: DALIAN RESEARCH INSTITUTE OF PETROLEUM AND PETROCHEMICALS, SINOPEC Corp. |