CN208279531U - A kind of system based on methacrylic acid and ethylene oxide synthesis hydroxyethyl methacrylate - Google Patents
A kind of system based on methacrylic acid and ethylene oxide synthesis hydroxyethyl methacrylate Download PDFInfo
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- CN208279531U CN208279531U CN201720174675.7U CN201720174675U CN208279531U CN 208279531 U CN208279531 U CN 208279531U CN 201720174675 U CN201720174675 U CN 201720174675U CN 208279531 U CN208279531 U CN 208279531U
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- hydroxyethyl methacrylate
- methacrylic acid
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Abstract
The system based on methacrylic acid and ethylene oxide synthesis hydroxyethyl methacrylate that the utility model discloses a kind of comprising pre-mixing stage, addition synthesis phase, holding stage, stage of rectification；The pre-mixing stage includes premixer, and the addition synthesis phase includes reaction kettle, and the holding stage includes warmer, and the stage of rectification includes rectifying column；The premixer is connect with the reaction kettle, and the reaction kettle is connect with the warmer, and the warmer is connect with rectifying column, and the system is not only easy to operate, high conversion rate, but also technique is easier to control, and is greatly reduced in energy consumption.
Description
Technical field
The utility model relates to a kind of chemically synthesized fields, in particular to a kind of to be based on methacrylic acid and ethylene oxide
The system of synthesizing methyl hydroxy-ethyl acrylate.
Background technique
Hydroxyethyl methacrylate is a kind of colourless transparent liquid, and special structure occupies weight in modern organic synthesis
Status is wanted, is a kind of important functional monomer with the cured photochemical reaction of two-stage, polymer has special gloss
And weatherability, it is usually used in coating, fibre finish, contact lens etc..
Summary of the invention
The utility model is proposed that a kind of based on methacrylic acid and ethylene oxide synthesis hydroxyethyl methacrylate
System, the system make hydroxyethyl methacrylate purity improve, by-product reduce, improve product quality, and whole
It is synthesized in a technique using continous way, increases yield, entire process conditions easier to control.To achieve the above object, this is practical
Novel technical solution is as follows:
A kind of system based on methacrylic acid and ethylene oxide synthesis hydroxyethyl methacrylate, including premixing rank
Section, addition synthesis phase, holding stage, stage of rectification；The pre-mixing stage includes premixer, the addition synthesis phase
Including reaction kettle, the holding stage includes warmer, and the stage of rectification includes rectifying column；The premixer and described anti-
Kettle is answered to connect, the reaction kettle is connect with the warmer, and the warmer is connect with rectifying column.
Pre-mixing stage: a certain proportion of methacrylic acid, catalyst and polymerization inhibitor are sequentially added in premixer, made
It is uniformly mixed, while being warming up to certain temperature；
Addition synthesis phase: after the completion of premixing, material being sent into reaction kettle, is controlled reaction temperature, is made its reaction
It is converted to hydroxyethyl methacrylate, since side reaction easily occurs in reaction, generates dibasic acid esters, therefore reaction condition needs strictly
Control guarantees that methacrylic acid maximization is converted to hydroxyethyl methacrylate；
Holding stage: the mixture after epoxy ethyl ester will be passed through and sent into warmer, while polymerization inhibitor is added, prevent from gathering
It closes, reaction generates hydroxyethyl methacrylate；
Stage of rectification: the hydroxyethyl methacrylate coarse fodder obtained after heat preservation, which first passes through, is centrifugated out catalyst, then
It is delivered to rectifying column, rectification under vacuum obtains finished product.
In the pre-mixing stage, the mass percent of composite catalyst is 2.2-2.5%, and when reaction first adds methyl
Acrylic acid adds composite catalyst again, and pressure is normal pressure.
In the addition synthesis phase, temperature is controlled at 85 DEG C, and pressure is normal pressure.
In the holding stage, for the polymerization for avoiding methacrylic acid and hydroxyethyl methacrylate, in warmer
Hydroquinone-p-hydroxyanisole is added as polymerization inhibitor, warmer temperature is controlled at 80 DEG C.
The beneficial effects of the utility model are:
(1), by the mixing of the reactant in reaction more evenly, reaction more sufficiently, technique it is easy to control；
(2), system that employs continuous productions, improve product yield, improve economic benefit；
(3), the system does not use heavy metal catalyst, reduces environmental pollution and treatment cost；
(4), the system energy consumption is low, reduces human cost.
Detailed description of the invention
Fig. 1 is the system response flow chart of the utility model.
Specific embodiment
A kind of system based on methacrylic acid and ethylene oxide synthesis hydroxyethyl methacrylate, including premixing rank
Section, addition synthesis phase, holding stage, stage of rectification；The pre-mixing stage includes premixer, the addition synthesis phase
Including reaction kettle, the holding stage includes warmer, and the stage of rectification includes rectifying column；The premixer and described anti-
Kettle is answered to connect, the reaction kettle is connect with the warmer, and the warmer is connect with rectifying column.
Pre-mixing stage: a certain proportion of methacrylic acid, catalyst and polymerization inhibitor are sequentially added in premixer, made
It is uniformly mixed, while being warming up to certain temperature；
Addition synthesis phase: after the completion of premixing, material being sent into reaction kettle, is controlled reaction temperature, is made its reaction
It is converted to hydroxyethyl methacrylate, since side reaction easily occurs in reaction, generates dibasic acid esters, therefore reaction condition needs strictly
Control guarantees that methacrylic acid maximization is converted to hydroxyethyl methacrylate；
Holding stage: the mixture after epoxy ethyl ester will be passed through and sent into warmer, while polymerization inhibitor is added, prevent from gathering
It closes, reaction generates hydroxyethyl methacrylate；
Stage of rectification: the hydroxyethyl methacrylate coarse fodder obtained after heat preservation, which first passes through, is centrifugated out catalyst, then
It is delivered to rectifying column, rectification under vacuum obtains finished product.
In the pre-mixing stage, the mass percent of composite catalyst is 2.2-2.5%, and when reaction first adds methyl
Acrylic acid adds composite catalyst again, and pressure is normal pressure.
In the addition synthesis phase, temperature is controlled at 85 DEG C, and pressure is normal pressure.
In the holding stage, for the polymerization for avoiding methacrylic acid and hydroxyethyl methacrylate, in warmer
Hydroquinone-p-hydroxyanisole is added as polymerization inhibitor, warmer temperature is controlled at 80 DEG C.
Claims (1)
1. a kind of system based on methacrylic acid and ethylene oxide synthesis hydroxyethyl methacrylate, which is characterized in that including
Pre-mixing stage, addition synthesis phase, holding stage, stage of rectification；The pre-mixing stage includes premixer, the addition
Synthesis phase includes reaction kettle, and the holding stage includes warmer, and the stage of rectification includes rectifying column；The premixer
It is connect with the reaction kettle, the reaction kettle is connect with the warmer, and the warmer is connect with rectifying column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720174675.7U CN208279531U (en) | 2017-02-27 | 2017-02-27 | A kind of system based on methacrylic acid and ethylene oxide synthesis hydroxyethyl methacrylate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720174675.7U CN208279531U (en) | 2017-02-27 | 2017-02-27 | A kind of system based on methacrylic acid and ethylene oxide synthesis hydroxyethyl methacrylate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208279531U true CN208279531U (en) | 2018-12-25 |
Family
ID=64746930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720174675.7U Expired - Fee Related CN208279531U (en) | 2017-02-27 | 2017-02-27 | A kind of system based on methacrylic acid and ethylene oxide synthesis hydroxyethyl methacrylate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208279531U (en) |
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2017
- 2017-02-27 CN CN201720174675.7U patent/CN208279531U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181225 Termination date: 20190227 |