CN104741144A - Preparation method of catalyst chitosan sulfate used for ethylparaben synthesis - Google Patents
Preparation method of catalyst chitosan sulfate used for ethylparaben synthesis Download PDFInfo
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- CN104741144A CN104741144A CN201310722742.0A CN201310722742A CN104741144A CN 104741144 A CN104741144 A CN 104741144A CN 201310722742 A CN201310722742 A CN 201310722742A CN 104741144 A CN104741144 A CN 104741144A
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- catalyst
- chitosan sulfate
- ethylparaben
- chitosan
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Abstract
The invention discloses a preparation method of a catalyst chitosan sulfate used for ethylparaben synthesis, which comprises the following steps: 1)using 2% of acetate for dissolving chitosan, adding 0.5mol/L H2SO4; and 2)performing pumping filtration on generated sediment, washing to neutrality by water, then dehydrating by ethanol and acetone in order, and drying under vacuum at 60 DEG C to obtain the chitosan sulfate. According to the method of the invention, chitosan sulfate is a novel solid acid salt catalyst, and has the advantages that catalytic activity is high, usage amount is little, selectivity is good, generation of side effect is reduced, product yield is high, post-treatment is simple and convenient, continuous catalysis performance is stable, equipment corrosion is prevented, waste liquid discharge is greatly reduced, no environment pollution is generated, and the catalyst chitosan sulfate is suitable for industrial production.
Description
Technical field
The present invention relates to a kind of preparation method synthesizing ethylparaben catalyst, be specifically related to a kind of preparation method synthesizing ethylparaben catalyst Chitosan Sulfate.
Background technology
Nipagin esters is also called para hydroxybenzene potassium acid esters, is the series of anticorrosion agent that purposes is the widest in the world, consumption is maximum, applying frequency is the highest at present.The advantages such as it has efficiently, low toxicity, spectrum, easily compatibility, are widely used in the aspects such as daily use chemicals, medicine, food, feed and various industrial antisepsis.The synthesis of ethylparaben adopts P-hydroxybenzoic acid and ethanol directly to prepare under concentrated sulfuric acid effect usually, but sulfuric acid has serious corrosivity, easily side reaction and contaminated environment occurs.
Summary of the invention
The object of the invention is to, provide a kind of preparation method synthesizing ethylparaben catalyst Chitosan Sulfate, Chitosan Sulfate is a kind of solid acid salt catalyst of novelty, catalytic activity is high, and consumption is few, selective good, the generation of side reaction can be reduced, product yield is high, and post processing is simple and convenient, continuous catalysis stable performance, prevent equipment corrosion, greatly reduce the discharge of waste liquid, environmentally safe, be applicable to suitability for industrialized production.
The preparation method of described synthesis ethylparaben catalyst Chitosan Sulfate, comprises the following steps:
One, shitosan is used 2% acetic acid, add 0.5mol/L H
2sO
4;
Two, generate precipitation suction filtration, be washed with water to neutrality, then successively with ethanol, acetone dehydration, finally vacuum drying at 60 DEG C, obtains Chitosan Sulfate.
The preparation method of synthesis ethylparaben catalyst Chitosan Sulfate provided by the invention, its beneficial effect is, Chitosan Sulfate is a kind of solid acid salt catalyst of novelty, catalytic activity is high, and consumption is few, selective good, the generation of side reaction can be reduced, product yield is high, and post processing is simple and convenient, continuous catalysis stable performance, prevent equipment corrosion, greatly reduce the discharge of waste liquid, environmentally safe, be applicable to suitability for industrialized production.
Detailed description of the invention
Below in conjunction with an embodiment, the preparation method of synthesis ethylparaben catalyst Chitosan Sulfate provided by the invention is described in detail.
Embodiment
One, shitosan is used 2% acetic acid, add 0.5mol/L H
2sO
4;
Two, generate precipitation suction filtration, be washed with water to neutrality, then successively with ethanol, acetone dehydration, finally vacuum drying at 60 DEG C, obtains Chitosan Sulfate.
Claims (1)
1. synthesize a preparation method for ethylparaben catalyst Chitosan Sulfate, it is characterized in that: it comprises the following steps:
One, shitosan is used 2% acetic acid, add 0.5mol/L H
2sO
4;
Two, generate precipitation suction filtration, be washed with water to neutrality, then successively with ethanol, acetone dehydration, finally vacuum drying at 60 DEG C, obtains Chitosan Sulfate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310722742.0A CN104741144A (en) | 2013-12-25 | 2013-12-25 | Preparation method of catalyst chitosan sulfate used for ethylparaben synthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310722742.0A CN104741144A (en) | 2013-12-25 | 2013-12-25 | Preparation method of catalyst chitosan sulfate used for ethylparaben synthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104741144A true CN104741144A (en) | 2015-07-01 |
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| CN201310722742.0A Pending CN104741144A (en) | 2013-12-25 | 2013-12-25 | Preparation method of catalyst chitosan sulfate used for ethylparaben synthesis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108395490A (en) * | 2018-04-10 | 2018-08-14 | 河南大学 | A kind of methods and applications of the nitrogen prepared as raw material using novel biomass base protonized ionic liquid/sulphur codope grading-hole Carbon Materials |
-
2013
- 2013-12-25 CN CN201310722742.0A patent/CN104741144A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108395490A (en) * | 2018-04-10 | 2018-08-14 | 河南大学 | A kind of methods and applications of the nitrogen prepared as raw material using novel biomass base protonized ionic liquid/sulphur codope grading-hole Carbon Materials |
| CN108395490B (en) * | 2018-04-10 | 2020-05-26 | 河南大学 | Method for preparing nitrogen/sulfur co-doped hierarchical porous carbon material by taking biomass-based protonated ionic liquid as raw material and application |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150701 |
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| WD01 | Invention patent application deemed withdrawn after publication |