CN1223577C - Process for synthesizing dibutyl carbonate - Google Patents
Process for synthesizing dibutyl carbonate Download PDFInfo
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- CN1223577C CN1223577C CN 200410036771 CN200410036771A CN1223577C CN 1223577 C CN1223577 C CN 1223577C CN 200410036771 CN200410036771 CN 200410036771 CN 200410036771 A CN200410036771 A CN 200410036771A CN 1223577 C CN1223577 C CN 1223577C
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- methylcarbonate
- carbonate
- dibutyl carbonate
- molecular sieve
- butanols
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Abstract
The present invention relates to a method for synthesizing dibutyl carbonate through the catalysis of loaded catalysts, particularly to a method for synthesizing dibutyl carbonate by using raw materials, namely methyl carbonate and butanol, and solid catalysts under a heterogeneous catalysis condition, wherein the catalysts are obtained by loading hydroxide of alkali metal, halide of alkali metal or carbonate of alkali metal to activated alumina, activated carbon or a molecular sieve carrier by the vacuum impregnating method. By using the method, higher conversion rate and yield are obtained under the set catalytic reaction condition, the conversion rate of methyl carbonate can reach 97%, and target product selectivity can reach 86%. The catalyst has the advantages of simple preparation method and low cost. Simultaneously, the catalyst has higher stability, and the product post treatment is simple.
Description
Technical field
The present invention relates to a kind of method with loaded catalyst catalytic synthesis of C dibutyl phthalate.
Background technology
Dialkyl carbonate obtains practical application in electrochemical field because of it has electrochemical stability preferably, higher flash-point and lower fusing point in lithium ion battery, wherein dibutyl carbonate has bigger molecular weight because of it, its flash-point, oxidation resistance are improved, thereby make the electrochemical stability of lithium-ion battery electrolytes and the also corresponding (Barker that is improved of security of battery, Jeremy, etal, Carbonaceous electrode and compatible electrolyte[P], U S Patent, 5,643 695,1997; Zhuan Quanchao, Wushan etc., the research of lithium ion battery organic electrolyte, the 7th volume fourth phase of calendar year 2001), two problems of main existence in traditional synthetic method, one is that this method should be reversible reaction, feed stock conversion is lower, another is that traditional carbonylation agent that uses such as phosgene etc. all have certain toxicity, all cause very big pollution to production process and environment, this new green chemical of methylcarbonate comes out, because it is nontoxic chemical, more because the superiority of himself structure, it both can make carbonylation agent, and still good methylating reagent can replace phosgene, methyl-sulfate, deleterious reagent such as monochloro methane has been that raw material forms new synthetic matrix (S.Memoli, a M.Selva with the methylcarbonate in organic synthesis, Dimethylcarbonate foreco-friendly methylation reactions, Chemosphere 43 (2001) 115-121; Yoshio Ono, Dimethyl carbonate for environmentally benginreactions, Catalysis Today 35 (1997) 15-25).
Summary of the invention
The method that the purpose of this invention is to provide higher, safer, the eco-friendly loaded catalyst catalytic synthesis of C of a kind of efficient dibutyl phthalate.
Technical scheme of the present invention is as follows:
A kind of method of carbonate synthesis dibutylester, its special feature is, with methylcarbonate and butanols is raw material, employing promptly gets dibutyl carbonate with the solid catalyst that alkali-metal oxyhydroxide, alkali-metal halogenide or alkali-metal carbonate obtain through vacuum impregnation technology by transesterification reaction;
Wherein the mol ratio of material carbon dimethyl phthalate and butanols is 1: 2～5, control reaction temperature 363～383K, 4～7 hours reaction times;
The catalyzer that adopts is that alkali-metal oxyhydroxide, alkali-metal halogenide or alkali-metal carbonate load to resulting solid catalyst on activated alumina, gac or the molecular sieve carrier through vacuum impregnation technology, wherein the active ingredient consumption accounts for 5%～30% of carrier quality, and this catalyst consumption is 3%～6% of a raw material total mass;
Be used to prepare the alkali-metal oxyhydroxide of catalyzer, alkali-metal halogenide or the preferred potassium hydroxide of alkali-metal carbonate, Potassium Bromide, Potassium monofluoride, salt of wormwood, sodium hydroxide.
The method of loaded catalyst catalytic synthesis of C dibutyl phthalate provided by the invention has that reaction conditions gentleness, feed stock conversion height, catalyzer are easy to separate, advantages such as technological process is simple, cleanliness without any pollution.
Embodiment
Embodiment 1
The present invention is to be the processing method of feedstock production dibutyl carbonate with methylcarbonate and butanols under the heterogeneous catalytic reaction condition, in Rotary Evaporators, react, adopt technical grade methylcarbonate 0.1mol, chemical pure butanols 0.4mol, loaded catalyst KOH/AC2.6g (be raw materials quality 6%), wherein the KOH charge capacity is 30% of gac (AC) quality, and the oil bath Heating temperature is 373K, 6 hours reaction times.
Because this reaction is two-step reaction, and all is reversible reaction, so the equilibrium constant is very little on the thermodynamics,, improve feed stock conversion and purpose selectivity of product, with the N of 50ml/min for breaking the restriction of thermodynamic(al)equilibrium
2Feed in the reaction flask, taking the saturation steam of the methyl alcohol that generates out of reactor, collect through cold-trap, is that available gas-chromatography analyze with catalyzer by the filtration simple separation with product after reaction finishes, methylcarbonate transformation efficiency 92.62%, dibutyl carbonate selectivity 72.91%.
Embodiment 2
Technical grade methylcarbonate 0.1mol, chemical pure butanols 0.5mol, loaded catalyst KOH/AC2.6g (be raw materials quality 6%), wherein the KOH charge capacity is 10% of gac (AC) quality, the oil bath Heating temperature is 363K, and in 5 hours reaction times, other conditions are identical with embodiment 1, methylcarbonate transformation efficiency 94.3%, dibutyl carbonate selectivity 43.26%.
Embodiment 3
Technical grade methylcarbonate 0.1mol, chemical pure butanols 0.5mol, loaded catalyst KOH/AC1.3g (be raw materials quality 3%), wherein the KOH charge capacity is 5% of gac (AC) quality, the oil bath Heating temperature is 363K, and in 5 hours reaction times, other conditions are identical with embodiment 1, methylcarbonate transformation efficiency 93.88%, dibutyl carbonate selectivity 38.27%.
Embodiment 4
Technical grade methylcarbonate 0.1mol, chemical pure butanols 0.5mol, loaded catalyst KF/Na β (beta molecular sieve) 2.16g (be raw materials quality 5%), wherein the KF charge capacity is 30% of a beta molecular sieve quality, the oil bath Heating temperature is 383K, and in 7 hours reaction times, other conditions are identical with embodiment 1, methylcarbonate transformation efficiency 97.04%, dibutyl carbonate selectivity 84.41%.
Embodiment 5
Technical grade methylcarbonate 0.1mol, chemical pure butanols 0.4mol, loaded catalyst KBr/AC2.6g (be raw materials quality 6%), wherein the KBr charge capacity is 30% of gac (AC) quality, the oil bath Heating temperature is 373K, and in 4 hours reaction times, other conditions are identical with embodiment 1, methylcarbonate transformation efficiency 95.61%, dibutyl carbonate selectivity 64.74%.
Embodiment 6
Technical grade methylcarbonate 0.1mol, chemical pure butanols 0.4mol, loaded catalyst KF/AC2.6g (be raw materials quality 6%), wherein the KF charge capacity is 30% of gac (AC) quality, the oil bath Heating temperature is 373K, and in 6 hours reaction times, other conditions are identical with embodiment 1, methylcarbonate transformation efficiency 96.74%, dibutyl carbonate selectivity 64.45%.
Embodiment 7
Technical grade methylcarbonate 0.1mol, chemical pure butanols 0.4mol, loaded catalyst K
2CO
3/ AC2.6g (be raw materials quality 6%), wherein K
2CO
3Charge capacity is 30% of gac (AC) quality, and the oil bath Heating temperature is 373K, and in 6 hours reaction times, other conditions are identical with embodiment 1, methylcarbonate transformation efficiency 94.9%, dibutyl carbonate selectivity 68.8%.
Embodiment 8
Technical grade methylcarbonate 0.1mol, chemical pure butanols 0.4mol, loaded catalyst KOH/NaX (X type molecular sieve) 2.6g (be raw materials quality 6%), wherein the KOH charge capacity is 30% of an X type molecular sieve quality, the oil bath Heating temperature is 373K, and in 6 hours reaction times, other conditions are identical with embodiment 1, methylcarbonate transformation efficiency 92.74%, dibutyl carbonate selectivity 65.67%.
Embodiment 9
Technical grade methylcarbonate 0.1mol, chemical pure butanols 0.4mol, loaded catalyst NaOH/NaX (X type molecular sieve) 2.6g (be raw materials quality 6%), wherein the NaOH charge capacity is 30% of an X type molecular sieve quality, the oil bath Heating temperature is 373K, and in 6 hours reaction times, other conditions are identical with embodiment 1, methylcarbonate transformation efficiency 94.68%, dibutyl carbonate selectivity 66.89%.
Embodiment 10
Technical grade methylcarbonate 0.1mol, chemical pure butanols 0.4mol, loaded catalyst KF/ active A l
2O
3(2.6g be raw materials quality 6%), wherein the KF charge capacity is active A l
2O
330% of quality, oil bath Heating temperature are 373K, and in 6 hours reaction times, other conditions are identical with embodiment 1, methylcarbonate transformation efficiency 94.48%, dibutyl carbonate selectivity 68.55%.
Embodiment 11
Technical grade methylcarbonate 0.1mol, chemical pure butanols 0.4mol, loaded catalyst KF/Na β (beta molecular sieve) 2.6g (be raw materials quality 6%), wherein the KF charge capacity is 30% of a beta molecular sieve quality, the oil bath Heating temperature is 373K, and in 6 hours reaction times, other conditions are identical with embodiment 1, methylcarbonate transformation efficiency 97.1%, dibutyl carbonate selectivity 68.95%.
Embodiment 12
Technical grade methylcarbonate 0.1mol, chemical pure butanols 0.2mol, loaded catalyst KF/Na β (beta molecular sieve) 2.6g (be raw materials quality 6%), wherein the KF charge capacity is 30% of a beta molecular sieve quality, the oil bath Heating temperature is 363K, and in 6 hours reaction times, other conditions are identical with embodiment 1, methylcarbonate transformation efficiency 80.51%, dibutyl carbonate selectivity 29.63%.
Embodiment 13
Technical grade methylcarbonate 0.1mol, chemical pure butanols 0.5mol, loaded catalyst KF/Na β (beta molecular sieve) 2.6g (be raw materials quality 6%), wherein the KF charge capacity is 30% of a beta molecular sieve quality, the oil bath Heating temperature is 383K, and in 7 hours reaction times, other conditions are identical with embodiment 1, methylcarbonate transformation efficiency 97.81%, dibutyl carbonate selectivity 86.59%.
Claims (1)
1, a kind of method of carbonate synthesis dibutylester is characterized in that:
With methylcarbonate and butanols is raw material, and wherein the mol ratio of methylcarbonate and butanols is 1: 2～5;
With potassium hydroxide, Potassium Bromide, Potassium monofluoride, salt of wormwood or sodium hydroxide is active ingredient, with activated alumina, gac or molecular sieve is carrier, the solid catalyst that obtains through vacuum impregnation technology, wherein the active ingredient consumption accounts for 5%～30% of carrier quality, and the consumption of solid catalyst is 3%～6% of a raw material total mass;
Control reaction temperature 363～383K, controlling reaction time 4～7 hours promptly gets dibutyl carbonate by transesterification reaction.
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| CN 200410036771 CN1223577C (en) | 2004-04-22 | 2004-04-22 | Process for synthesizing dibutyl carbonate |
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|---|---|---|---|
| CN 200410036771 CN1223577C (en) | 2004-04-22 | 2004-04-22 | Process for synthesizing dibutyl carbonate |
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| CN1569811A CN1569811A (en) | 2005-01-26 |
| CN1223577C true CN1223577C (en) | 2005-10-19 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012158107A1 (en) * | 2011-05-14 | 2012-11-22 | Rajni Hatti-Kaul | Method for producing cyclic carbonates |
| CN102351709A (en) * | 2011-10-17 | 2012-02-15 | 上海应用技术学院 | Preparation method for synthesis of dibutyl carbonate under catalysis of alkaline ion liquid |
| CN103449972A (en) * | 2012-05-30 | 2013-12-18 | 国际香料和香精公司 | 3,3-dimethyl-5-(2,2,3-trimethyl-cyclopentyl-3-vinyl)-pent-4-en-2-ol and preparation method thereof |
| CN103483200B (en) * | 2013-09-16 | 2016-02-17 | 河北工业大学 | A kind of method of transesterify Catalysts of Preparing Methyl Ethyl Carbonate |
| CN104030885B (en) * | 2014-06-30 | 2016-10-12 | 天津工业大学 | A kind of method of carbonate synthesis dibutyl ester |
| CN104262086A (en) * | 2014-09-03 | 2015-01-07 | 吉林化工学院 | Device for synthesizing carbonic ester by removing methanol by adopting packed bed ester exchange-adsorption |
| CN109331847B (en) * | 2018-11-16 | 2020-09-08 | 合肥能源研究院 | Catalyst for preparing maleic acid by catalytic oxidation of furfural and application thereof |
| CN109593076A (en) * | 2018-12-05 | 2019-04-09 | 常熟市常吉化工有限公司 | A kind of application of KF/NaY catalyst in synthesizing ethylene carbonate |
| CN109821560B (en) * | 2019-01-25 | 2022-04-22 | 中国科学院成都有机化学有限公司 | Catalyst for synthesizing dimethyl carbonate by ester exchange and application thereof |
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