CN104043483A - Preparation method of cyclodextrin included heteropoly tungstate supermolecule composite catalyst - Google Patents
Preparation method of cyclodextrin included heteropoly tungstate supermolecule composite catalyst Download PDFInfo
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- CN104043483A CN104043483A CN201410301224.6A CN201410301224A CN104043483A CN 104043483 A CN104043483 A CN 104043483A CN 201410301224 A CN201410301224 A CN 201410301224A CN 104043483 A CN104043483 A CN 104043483A
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Abstract
The invention relates to a preparation method of a cyclodextrin included heteropoly tungstate supermolecule composite catalyst for preparing biodiesel from swill-cooked dirty oil. The cyclodextrin included heteropoly tungstate supermolecule composite catalyst has supermolecule property, and enables the catalytic reaction of swill-cooked dirty oil and heteropoly tungstate of methyl alcohol to be carried out in a cyclodextrin inner cavity micro environment. The technical scheme is that the supermolecule composite catalyst is formed by heteropoly tungstate and beta-cyclodextrin or hydroxypropyl beta-cyclodextrin. The preparation method comprises the following steps: preparing the heteropoly tungstate and beta-cyclodextrin or hydroxypropyl beta-cyclodextrin with the mole ratio of 1 to 2 in a conical bottle at 60 DEG C into a water solution, wherein the amount of added water is 4-20 times of the total weight of the heteropoly tungstate and beta-cyclodextrin or hydroxypropyl beta-cyclodextrin, putting the solution into a microwave reactor, and radiating for 5-10 minutes at the frequency of 815MHz, thereby obtaining the supermolecule composite catalyst. The supermolecule composite catalyst is simple and convenient in preparation method, and has an extremely good catalytic effect.
Description
Technical field
The present invention relates to a kind of preparation method of cyclic dextrin clathrate heteropoly tungstic acid supermolecule composite catalyst of Preparation of biodiesel from waste oils.
Along with continuous consumption, the environmental pollution of petroleum resources are more serious, people start to turn to the exploitation of novel renewable and clean energy resource gradually.Utilize Preparation of biodiesel from waste oils both can obtain clean energy resource, can recycle again waste resource.The key of preparation biodiesel is to select suitable catalyst.Although because hydrochloric acid plasma acid application is convenient, there is catalytic effect, etching apparatus.The main solid acids such as heteropoly acid, p-methyl benzenesulfonic acid that use at present.
The object of the invention is to: in order to make the quick and complete biodiesel that is converted into of waste oil, and not etching apparatus and recycling of catalyst, spy provides a kind of preparation method of cyclic dextrin clathrate heteropoly tungstic acid supermolecule composite catalyst.
In order to achieve the above object, the present invention by the following technical solutions: by microwave by heteropoly tungstic acid inclusion in cyclodextrin inner chamber, form supermolecule composite catalyst.
Cyclic dextrin clathrate heteropoly tungstic acid supermolecule composite catalyst and preparation method comprise the following steps:
The heteropoly tungstic acid that is 1:2 by mol ratio and beta-schardinger dextrin-or modification beta-schardinger dextrin-are made into the aqueous solution in conical flask at 60 DEG C, the dosage of water is heteropoly tungstic acid and cyclodextrin or modified cyclodextrin gross weight 4-20 times, above-mentioned solution is put into microwave reactor, under 815MHz frequency, radiation 5～10 minutes, obtains supermolecule composite catalyst.
The present invention compared with prior art, its beneficial effect is: heteropoly acid by cyclic dextrin clathrate after, the catalytic esterification of two kinds of substrates of grease and methyl alcohol and heteropoly tungstic acid carries out in cyclodextrin inner chamber microenvironment, and concentration of substrate is improved significantly, reaction rate accelerates.
Detailed description of the invention
Below by embodiment, the present invention is further described.
embodiment 1
At 60 DEG C, get beta-schardinger dextrin-5mmol (5.67g) and 2.5mmol(8.02g) Cs
2.5h
0.5pW
12o
40add 50mL distilled water wiring solution-forming, stir completely and put into microwave reactor after dissolving, radiation 5 minutes under 815MHz frequency, obtains white powder after evaporation water outlet.It is product cyclic dextrin clathrate heteropoly acid supermolecule composite catalyst.The waste oil that Xindu District, Chengdu is collected reacts 30 minutes methanol esterification rates 97% at 60 DEG C, than using merely Cs
2.5h
0.5pW
12o
40improve 17%.
embodiment 2
At 60 DEG C, get beta-schardinger dextrin-5mmol (5.67g) and 2.5mmol(7.47g) K
8siW
11o
39add 50mL distilled water wiring solution-forming, stir completely and put into microwave reactor after dissolving, radiation 8 minutes under 815MHz frequency, obtains pale powder after evaporation water outlet.It is product cyclic dextrin clathrate heteropoly acid supermolecule composite catalyst.The waste oil that Xindu District, Chengdu is collected reacts 30 minutes methanol esterification rates 91% at 60 DEG C, than using merely K
8siW
11o
39improve 21%.
embodiment 3
At 60 DEG C, get beta-schardinger dextrin-5mmol (5.67g) and 2.5mmol(7.20g) H
3pW
12o
40add 50mL distilled water wiring solution-forming, stir completely and put into microwave reactor after dissolving, radiation 6 minutes under 815MHz frequency, obtains white powder after evaporation water outlet.It is product cyclic dextrin clathrate heteropoly acid supermolecule composite catalyst.The waste oil that Xindu District, Chengdu is collected reacts 30 minutes methanol esterification rates 92% at 60 DEG C, than using merely H
3pW
12o
40improve 25%.
embodiment 4
At 60 DEG C, get HP-β-CD 5mmol (5.97g) and 2.5mmol(8.02g) Cs
2.5h
0.5pW
12o
40add 50mL distilled water wiring solution-forming, stir completely and put into microwave reactor after dissolving, radiation 5 minutes under 815MHz frequency, obtains white powder after evaporation water outlet.It is product cyclic dextrin clathrate heteropoly acid supermolecule composite catalyst.The waste oil that Xindu District, Chengdu is collected reacts 30 minutes methanol esterification rates 97.5% at 60 DEG C, than using merely Cs
2.5h
0.5pW
12o
40improve 17%.
Claims (2)
1. a preparation method for cyclic dextrin clathrate heteropoly tungstic acid supermolecule composite catalyst, is characterized in that supermolecule composite catalyst is made up of heteropoly tungstic acid and cyclodextrin or hydroxypropyl cyclodextrin.
2. the preparation method of the cyclic dextrin clathrate heteropoly tungstic acid supermolecule composite catalyst as described in right 1 requirement comprises the following steps:
The heteropoly tungstic acid that is 1:2 by mol ratio and beta-schardinger dextrin-or hydroxypropylβ-cyclodextrin are made into the aqueous solution in conical flask at 60 DEG C, the dosage of water is heteropoly tungstic acid and beta-schardinger dextrin-or HP-β-CD gross weight 4-20 times, above-mentioned solution is put into microwave reactor, under 815MHz frequency, radiation 5～10 minutes, obtains supermolecule composite catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410301224.6A CN104043483A (en) | 2014-06-30 | 2014-06-30 | Preparation method of cyclodextrin included heteropoly tungstate supermolecule composite catalyst |
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|---|---|---|---|
| CN201410301224.6A CN104043483A (en) | 2014-06-30 | 2014-06-30 | Preparation method of cyclodextrin included heteropoly tungstate supermolecule composite catalyst |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104525263A (en) * | 2014-12-25 | 2015-04-22 | 江南大学 | Preparation method of cyclodextrin/montmorillonite/heteropoly acid composite catalyst |
| CN108786442A (en) * | 2018-06-10 | 2018-11-13 | 杭州传扬环保科技有限公司 | A kind of jet printing type environmental protection formaldehyde purifying agent and preparation method thereof |
| CN110026239A (en) * | 2019-04-19 | 2019-07-19 | 扬州大学 | Beta-cyclodextrin-silico-tungstic acid supermolecule composite catalyst and preparation method thereof |
| CN113549251A (en) * | 2021-08-13 | 2021-10-26 | 安徽工业大学 | Inorganic-organic hybrid photochromic material containing cyclodextrin and heteropoly acid, preparation method and application thereof |
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2014
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| EP1029871A1 (en) * | 1999-02-19 | 2000-08-23 | Bayer Aktiengesellschaft | Bimetallic-cyanide catalysts used for preparing polyether polyols |
| CN101104665A (en) * | 2007-04-29 | 2008-01-16 | 西南石油大学 | AM/NaAA/allylcyclodextrin polymer with inclusion function and synthetic method thereof |
| CN102172537A (en) * | 2011-03-16 | 2011-09-07 | 中国石油大学(华东) | Biomimetic catalyst for preparing acetal or ketal compounds and using method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104525263A (en) * | 2014-12-25 | 2015-04-22 | 江南大学 | Preparation method of cyclodextrin/montmorillonite/heteropoly acid composite catalyst |
| CN108786442A (en) * | 2018-06-10 | 2018-11-13 | 杭州传扬环保科技有限公司 | A kind of jet printing type environmental protection formaldehyde purifying agent and preparation method thereof |
| CN110026239A (en) * | 2019-04-19 | 2019-07-19 | 扬州大学 | Beta-cyclodextrin-silico-tungstic acid supermolecule composite catalyst and preparation method thereof |
| CN110026239B (en) * | 2019-04-19 | 2021-09-03 | 扬州大学 | Beta-cyclodextrin-silicotungstic acid supermolecule composite catalyst and preparation method thereof |
| CN113549251A (en) * | 2021-08-13 | 2021-10-26 | 安徽工业大学 | Inorganic-organic hybrid photochromic material containing cyclodextrin and heteropoly acid, preparation method and application thereof |
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Application publication date: 20140917 |