CN101735052A - Method for preparing dibutyl itaconate - Google Patents
Method for preparing dibutyl itaconate Download PDFInfo
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- CN101735052A CN101735052A CN200910231146A CN200910231146A CN101735052A CN 101735052 A CN101735052 A CN 101735052A CN 200910231146 A CN200910231146 A CN 200910231146A CN 200910231146 A CN200910231146 A CN 200910231146A CN 101735052 A CN101735052 A CN 101735052A
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- dibutyl itaconate
- methylene
- succinic acid
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Abstract
The invention discloses a method for preparing dibutyl itaconate. In particular, the method comprises the following steps of: adopting a novel high-efficiency catalysis-polymerization inhibition combined system to catalyze the reaction of itaconic acid and normal butyl alcohol at normal pressure and a temperature of between 90 and 130 DEG C for 2 to 8 hours to form the dibutyl itaconate, wherein the catalysis-polymerization inhibition combined system comprises a catalyst of strong acid ion exchange resin and a polymerization inhibitor of hydroquinone. Compared with the conventional acid catalytic method, the method of the invention has the characteristics that: 1, the reaction time is short, and the energy consumption is low; 2, in a process of esterification, polymers are hardly generated, and the selectivity is high; 3, the product of the dibutyl itaconate is automatically separated from the catalyst, and the separating process is easier; and 4, the used catalyst in the reaction can be directly reused without treatment.
Description
Technical field
The present invention relates to a kind of method for preparing dibutyl itaconate, be specifically related to a kind of method for preparing dibutyl itaconate with strong-acid ion exchange resin catalysis methylene-succinic acid and propyl carbinol esterification.
Background technology
Dibutyl itaconate is water white oily liquids, and low toxicity is a kind of intermediate of important reactive monomer, comonomer and organic synthesis, still the internal plasticizer of multiple plastics; It can autohemagglutination and copolymerization, and the resulting product of copolymerization is widely used in formed material, coating material, fiber and film treatment agent, lubricating oil and additive thereof, binding agent ion exchange resin etc.The multipolymer that contains dibutyl itaconate and vinyl-acetic ester has good effect of heat insulation; Dibutyl itaconate joins in the washing composition, can improve washing effect; Dibutyl itaconate also can be used as solvent and is used to prepare color photography latex, extraordinary ink etc.In addition, dibutyl itaconate can also be as the linking agent of gelation promotor, rust-inhibiting additive, tackiness agent and unsaturated polyester.Along with the continuous development of industries such as coating, paint, rubber, agricultural chemicals, washing composition, plastics, dibutyl itaconate has more and more wider purposes.Preparing the easiest method of dibutyl itaconate is to adopt the vitriol oil to make the direct esterification method of catalyzer, but because the strong oxidizing property characteristics and the production technique of the vitriol oil are perfect inadequately, so there is more side reaction, and then cause that the products obtained therefrom color is dark, purity is low, and produce three wastes problems such as (especially waste water) in the production process.
Summary of the invention
The objective of the invention is to replace the method that traditional protonic acid catalysis methylene-succinic acid and propyl carbinol esterification prepare dibutyl itaconate, a kind of new and effective catalysis, the poly-compound system of resistance are provided, catalysis methylene-succinic acid and propyl carbinol esterification prepare the novel method of dibutyl itaconate, this method has not etching apparatus, and three wastes discharge amount reaches product yield advantages of higher under the reaction conditions of gentleness less.
Its technical scheme is:
Adopt a kind of new and effective catalysis, the poly-compound system catalysis methylene-succinic acid of resistance and propyl carbinol reaction to generate dibutyl itaconate.
Comprise catalyzer in above-mentioned catalysis, the poly-compound system of resistance, described catalyzer is a strong-acid ion exchange resin.
Comprise stopper in above-mentioned catalysis, the poly-compound system of resistance, described stopper is a Resorcinol.
The mass ratio of above-mentioned strong-acid ion exchange resin and methylene-succinic acid is 1: 20～1: 5, and Resorcinol is 1: 200～1: 100 with the ratio of methylene-succinic acid quality, and the mass ratio of methylene-succinic acid and propyl carbinol is 1: 1.4～1: 3.
The above-mentioned method for preparing dibutyl itaconate specifically may further comprise the steps:
A chooses methylene-succinic acid, propyl carbinol, strong-acid ion exchange resin and Resorcinol, adds successively in the reactor, stirs, and reacts 2～8 hours down at 90 ℃～130 ℃, obtains the dibutyl itaconate crude product;
B obtains filtrate and filter cake to the dibutyl itaconate filtration of crude product, and filtrate obtains the dibutyl itaconate finished product through washing, underpressure distillation successively.
Among the above-mentioned steps a, also choose the band aqua, the band aqua joins in the reactor before reaction or in the reaction process, and the mass ratio of described band aqua and methylene-succinic acid is 1: 10～1: 5.
Above-mentioned band aqua is a kind of in benzene, toluene or the dimethylbenzene.
The present invention compares with the method for propyl carbinol prepared in reaction dibutyl itaconate with adopting traditional protonic acid catalysis methylene-succinic acid, has following characteristics:
1. temperature of reaction is low, and the time is short, less energy consumption.
Product can with ion exchange resin layering voluntarily, make the separation of product and aftertreatment more easy.
3. reaction exhausted ion exchange resin promptly can be used for reaction next time without any processing, and catalytic performance is not seen reduction.
4. no polymkeric substance generates in the reaction process, and the products therefrom look shallow, matter good, yield is high.
5. overcome the liquid catalyst that exists in the background technology and after reaction finishes, can not recycle, and the serious problem of environmental pollution.
Embodiment
The present invention adopts new and effective catalysis, the poly-compound system catalysis methylene-succinic acid of resistance and propyl carbinol reaction, and the mass ratio of methylene-succinic acid and propyl carbinol is 1: 1.4～1: 3, preferred 1: 2; Catalysis, the poly-compound system of resistance comprise the catalyzer strong-acid ion exchange resin, in order to prevent the generation of polymkeric substance, we preferably adopt the poly-compound system of being made up of catalyzer and stopper of catalysis, resistance the yield of raising product, wherein catalyzer is a strong-acid ion exchange resin, the preferred Resorcinol of stopper.The mass ratio of strong-acid ion exchange resin and methylene-succinic acid is 1: 20～1: 5 preferred 1: 15～1: 8, more preferably 1: 12～1: 10; The mass ratio of Resorcinol and methylene-succinic acid is 1: 200～1: 100, and the mass ratio of preferred Resorcinol and methylene-succinic acid is 1: 150.
The present invention simultaneously is the esterification of methylene-succinic acid and propyl carbinol, and esterification is reversible reaction, and in order to improve esterification yield, we can also add the band aqua in reactor, in order to remove the water molecules that produces in the reaction process.The band aqua can join before reaction in the reactor, also can visual response water outlet situation join in the reactor in reaction process.The present invention preferentially selects a kind of for the band aqua in the benzene,toluene,xylene, also can select wherein mixture of the two or three's mixture according to the difference of reaction conditions sometimes.Consumption with the belt transect aqua will suit, and the weight ratio of band aqua and methylene-succinic acid is 1: 10～1: 5 among the present invention, preferred 1: 8～1: 6, is more preferably 1: 7.When band aqua consumption less than methylene-succinic acid weight 1/10th the time, esterification yield is low, esterification temperature is also wayward; But when the consumption of band aqua greater than five of methylene-succinic acid weight/for the moment, cause the relative concentration of reactant to reduce, also reduced esterification yield.
Among the above-mentioned steps b, the filter cake composition is mainly strong-acid ion exchange resin, certainly the stopper that also contains trace, so can collect, catalyzer as next esterification is standby, in addition, because the premium properties of strong-acid ion exchange resin, we do not need that used strong-acid ion exchange resin is done any processing and promptly can be used for reaction next time during this period.
Because the characteristics of above-mentioned strong-acid ion exchange resin, we can also adopt following step to come alternative steps b that the dibutyl itaconate crude product is carried out purifying, that is: the dibutyl itaconate crude product is left standstill for some time, layering, directly pour out the upper strata product and obtain the dibutyl itaconate finished product mutually, in order further to improve the purity of dibutyl itaconate finished product, we can also simply wash and underpressure distillation removes steps such as water and unreacted propyl carbinol mutually to the upper strata product of directly pouring out; Lower floor's strong-acid ion exchange resin need not any processing and promptly can be used for next esterification.
Below by specific embodiment the present invention is further specified.
Embodiment 1
Buy methylene-succinic acid, propyl carbinol, strongly-acid amberlite, Resorcinol, benzene, toluene and dimethylbenzene from the market, take by weighing 100Kg methylene-succinic acid, 140Kg propyl carbinol, 5Kg strong-acid ion exchange resin, 1Kg Resorcinol, add in the reactor successively, reactor is provided with agitator and thermometer, start agitator with the raw material blending in the reactor, pick up counting after being heated to 130 ℃, reacted 6 hours, obtain the dibutyl itaconate crude product; Stop heating, be cooled to room temperature and filter then, obtain filtrate and filter cake, filtrate is washed, underpressure distillation removes water and unreacted propyl carbinol then, obtains the dibutyl itaconate finished product, yield 85%.Filter cake reclaims, and does not need to be directly used in next esterification through any processing.
Embodiment 2
Raw material obtains mode with embodiment 1, take by weighing 100Kg methylene-succinic acid, 300Kg propyl carbinol, 20Kg strong-acid ion exchange resin, 0.5Kg Resorcinol and 10Kg dimethylbenzene, drop in the reactor, reactor is provided with agitator, thermometer and water trap, start agitator raw material is mixed, when stirring, reactor is heated, be heated to 90 ℃ and pick up counting, reacted 8 hours, and obtained the dibutyl itaconate crude product; The dibutyl itaconate crude product is cooled off, can naturally cooling, also can adopt the tap water cooling certainly in order to save time, the method for purification obtains the dibutyl itaconate finished product with embodiment 1, yield 98.7%.
Embodiment 3
Raw material obtains mode with embodiment 1, take by weighing 80Kg methylene-succinic acid, 160Kg propyl carbinol, 10Kg strong-acid ion exchange resin, 0.75Kg Resorcinol and 20Kg benzene, drop in the reactor, reactor is provided with agitator, thermometer and water trap, start agitator raw material is mixed, when stirring, reactor is heated, be heated to 120 ℃ and pick up counting, reacted 6 hours, and obtained the dibutyl itaconate crude product; The dibutyl itaconate crude product is carried out naturally cooling, cooled dibutyl itaconate crude product is left standstill, treat directly the upper strata product to be poured out mutually after the layering, promptly obtain the dibutyl itaconate finished product, yield 95.9%; Lower floor's strong-acid ion exchange resin need not any processing and promptly can be used for next esterification.
Embodiment 4
Raw material obtains mode with embodiment 1, take by weighing 60Kg methylene-succinic acid, 130Kg propyl carbinol, 3Kg strong-acid ion exchange resin, 0.4Kg Resorcinol and 8Kg toluene, drop in the reactor, reactor is provided with agitator, thermometer and water trap, start agitator raw material is mixed, when stirring, reactor is heated, be heated to 125 ℃ and pick up counting, reacted 7 hours, and obtained the dibutyl itaconate crude product; The dibutyl itaconate crude product is carried out naturally cooling, cooled dibutyl itaconate crude product is left standstill, treat directly the upper strata product to be poured out mutually after the layering, again the upper strata product of pouring out is removed water and unreacted propyl carbinol and small amount of residual dewatering agent toluene step through washing, underpressure distillation mutually successively, obtain the dibutyl itaconate finished product, yield 97.8%; Lower floor's ion exchange resin need not any processing and promptly can be used for next esterification.
The foregoing description has been done detailed description to the present invention, but the present invention is not limited to the foregoing description, in the ken that those of ordinary skills possessed, can also make many variations to it.For example, the feed way in the foregoing description is not to add simultaneously but successively add, and can add in reaction process as Resorcinol, benzene, dimethylbenzene etc., or even a kind of material adds several times.
Claims (9)
1. a method for preparing dibutyl itaconate is characterized in that adopting a kind of new and effective catalysis, the poly-compound system catalysis methylene-succinic acid of resistance and propyl carbinol reaction to generate dibutyl itaconate.
2. a kind of method for preparing dibutyl itaconate according to claim 1 is characterized in that comprising catalyzer in described catalysis, the poly-compound system of resistance, and described catalyzer is a strong-acid ion exchange resin.
3. a kind of method for preparing dibutyl itaconate according to claim 1 and 2 is characterized in that comprising stopper in described catalysis, the poly-compound system of resistance, and described stopper is a Resorcinol.
4. a kind of method for preparing dibutyl itaconate according to claim 2, the mass ratio that it is characterized in that described strong-acid ion exchange resin and methylene-succinic acid is 1: 20～1: 5.
5. a kind of method for preparing dibutyl itaconate according to claim 3, the mass ratio that it is characterized in that described stopper and methylene-succinic acid is 1: 200～1: 100.
6. a kind of method for preparing dibutyl itaconate according to claim 1, the mass ratio that it is characterized in that described methylene-succinic acid and propyl carbinol is 1: 1.4～1: 3.
7. a kind of method for preparing dibutyl itaconate according to claim 3 is characterized in that may further comprise the steps:
A chooses methylene-succinic acid, propyl carbinol, strong-acid ion exchange resin and Resorcinol, adds successively in the reactor, stirs, and reacts 2～8 hours down at 90 ℃～130 ℃, obtains the dibutyl itaconate crude product;
B obtains filtrate and filter cake to the dibutyl itaconate filtration of crude product, and filtrate obtains the dibutyl itaconate finished product through washing, underpressure distillation successively.
8. a kind of method for preparing dibutyl itaconate according to claim 7, it is characterized in that among the described step a, also choose the band aqua, the band aqua joins in the reactor before reaction or in the reaction process, and the mass ratio of described band aqua and methylene-succinic acid is 1: 10～1: 5.
9. a kind of method for preparing dibutyl itaconate according to claim 8 is characterized in that described band aqua is benzene, toluene or dimethylbenzene.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910231146.6A CN101735052B (en) | 2009-12-10 | 2009-12-10 | Method for preparing dibutyl itaconate |
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| CN200910231146.6A CN101735052B (en) | 2009-12-10 | 2009-12-10 | Method for preparing dibutyl itaconate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109485563A (en) * | 2017-09-12 | 2019-03-19 | 北京化工大学 | A method of dibutyl itaconate is prepared based on heterocatalysis efficient green |
| CN111321176A (en) * | 2020-03-11 | 2020-06-23 | 北京化工大学 | Method for preparing 4-monooctyl itaconate by enzymatic selective catalysis |
-
2009
- 2009-12-10 CN CN200910231146.6A patent/CN101735052B/en active Active
Non-Patent Citations (3)
| Title |
|---|
| 于世涛: "衣康酸二甲酯的合成", 《精细化工》 * |
| 候晓红: "衣康酸二正丁酯的合成工艺研究", 《化学与黏合》 * |
| 谷亚昕: "H4SiW12O40催化合成衣康酸二甲酯", 《化工时刊》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109485563A (en) * | 2017-09-12 | 2019-03-19 | 北京化工大学 | A method of dibutyl itaconate is prepared based on heterocatalysis efficient green |
| CN111321176A (en) * | 2020-03-11 | 2020-06-23 | 北京化工大学 | Method for preparing 4-monooctyl itaconate by enzymatic selective catalysis |
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| CN101735052B (en) | 2014-03-19 |
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