CN106669841B - A kind of organic silicon composite and preparation method based on phosphotungstic acid and sulfonic acid funtionalized with meso-hole structure - Google Patents
A kind of organic silicon composite and preparation method based on phosphotungstic acid and sulfonic acid funtionalized with meso-hole structure Download PDFInfo
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- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/34—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of chromium, molybdenum or tungsten
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- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/0272—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing elements other than those covered by B01J31/0201 - B01J31/0255
- B01J31/0275—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing elements other than those covered by B01J31/0201 - B01J31/0255 also containing elements or functional groups covered by B01J31/0201 - B01J31/0269
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- C07C319/14—Preparation of thiols, sulfides, hydropolysulfides or polysulfides of sulfides
- C07C319/20—Preparation of thiols, sulfides, hydropolysulfides or polysulfides of sulfides by reactions not involving the formation of sulfide groups
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- B01J2231/00—Catalytic reactions performed with catalysts classified in B01J31/00
- B01J2231/40—Substitution reactions at carbon centres, e.g. C-C or C-X, i.e. carbon-hetero atom, cross-coupling, C-H activation or ring-opening reactions
- B01J2231/42—Catalytic cross-coupling, i.e. connection of previously not connected C-atoms or C- and X-atoms without rearrangement
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Abstract
A kind of organic silicon composite and preparation method based on phosphotungstic acid and sulfonic acid funtionalized with meso-hole structure, belongs to chemical field, has following chemical composition: H3PW12O40/SO3H‑C3H6‑Si(OH)3‑m(SiO)m‑(HO)3‑n(SiO)nSi‑C2H4‑Si(OSi)n(OH)3‑n, it may be assumed thatpr‑SO3H‑PMO/H3PW12O40.Product of the present invention uses structure with Keggin polyacid (H3PW12O40) it is used as active component；Bridging organosilane reagents (bis- (triethoxy silicon substrate) ethane-BTSE of 1,2-) are organosilane precursor；Nonionic surfactant (P123, M=5800) is used as structure directing agent；3- mercaptopropyl-trimethoxy silane (MPTMS) is silylating reagent, prepares a kind of organic silicon composite based on phosphotungstic acid and sulfonic functional with meso-hole structure using an one-step hydrolysis cocondensation combination hydrothermal technology design.Composite material of the inventionpr‑SO3H‑PMO/H3PW12O40Preparation process is simple, and reaction specificity is good, the carbon carbon coupling reaction high conversion rate for carrying out to benzhydrol and α-nitro dithio keteal, product purity height and reaction process cleaning.
Description
Technical field
The invention belongs to chemical field, it is related to a kind of organic based on phosphotungstic acid and sulfonic acid funtionalized with meso-hole structure
Silicon composite and preparation method.
Background technique
The liquid acids such as sulfuric acid are widely used in Chemical Manufacture as traditional acid catalyst, have more than 15,000,000 tons every year
Sulfuric acid be consumed.Pure product must remove these liquid acid catalysts, this process from reaction system in order to obtain
The a large amount of energy is consumed, and generates large amount of sewage, causes serious energy waste and environmental pollution.And liquid acid is to production
Equipment has serious corrosiveness, improves cost of equipment maintenance, shortens the service life of production equipment, is in industrial production
Urgent problem to be solved.The chemical engineering process of " green ", which is advocated, to be made using Ke Xunhuanliyong solid acid cannot not substitute recyclablely
Liquid acid catalyst.Therefore, solid acid catalyst has obtained scientists and has more and more paid close attention to.The frequent quilt of sulfonic acid group
As solid acid catalyst activity functional group, because it can efficiently provide proton, and in many polyelectrolyte films
Research in the solids such as verified it and polymer have good compatibility.
Since the 1970s, polyoxometallate is led as catalyst in petrochemical industry and catalyst preparation
Favor of the domain increasingly by catalyst operation person.Heteropoly acid is not only a kind of very strong pure Bronsted acid of acid strength or one kind
It can excellent acid catalysis and redox " difunctional " property catalyst.Therefore, heteropoly acid is high as catalytic activity, selective
Good, free of contamination environmental type solid acid catalyst, has advantageous advantage and wide application prospect.But it is pure more
Acid is used as catalyst to have, and specific surface area is small, corrodes equipment, pollute environment, being soluble in polar solvent, catalytic activity cannot sufficiently be sent out
The disadvantages of waving and is non-recyclable and reusable greatly limits the popularization and application of heteropoly acid in the industrial production.Cause
This needs to study the modification and heterogeneousization of heteropoly acid, to solve the problems, such as that polyacid is not easily recycled as homogeneous catalyst.
Currently, people are individually supported on silica pore material support by using sulfonic acid group or heteropoly acid mostly
Mode improve its specific surface area, thermal stability, catalytic activity and its reusability etc., to realize sulfonic group or polyacid
Heterogeneous acid catalysis and redox function.However, the surface of inorganic silicon dioxide composite material has the hydroxyl of high concentration,
With stronger hydrophily, the easy strong adsorption of hydrophily product is led in the surface and duct of silica in catalysis reaction
Catalyst serious inactivation during recycling is caused, also, mostly uses rear grafting or infusion process greatly, operating process is complicated,
Experimental period is long.
Result of study shows that the type for changing the organic group type and carrier that are embedded in hole wall largely influences
The catalytic performance of material.It finds, after material hole wall is internally embedded or channel surfaces introduce organic group, is keeping after study
While meso-hole structure, and the parent/hydrophobicity at duct interface can be improved, be conducive to the hydrothermal stability for improving mesoporous material,
The regulation of its interfacial property is even carried out by the type and introduction volume that change organic group.Therefore, design preparation contains simultaneously
Catalytic active component sulfonic group and the order mesoporous organosilicon composite catalyst of polyacid are of great significance.Preparation process can guarantee
Organic silicon composite has cellular structure similar with PMO carrier, moreover, compared with parent multi-acid salt, BET specific surface area
It is expected to significantly improve, and the diffusion rate of reactant or product is higher, the accesibility in duct is preferably and resistance to mass tranfer is smaller, from
And lead to its higher catalytic activity.Therefore, we are prepared for using one-step hydrolysis cocondensation combination hydrothermal technology design
A kind of organic silicon composite and preparation method based on phosphotungstic acid and sulfonic acid funtionalized with meso-hole structure, synthesispr-
SO3H-PMO/H3PW12O40Composite material.
Summary of the invention
The technical problem to be solved by the present invention is to be prepared for using one-step hydrolysis cocondensation combination hydrothermal technology design
A kind of organic silicon composite based on phosphotungstic acid and sulfonic acid funtionalized with meso-hole structure.
Product of the present invention uses structure with Keggin polyacid (H3PW12O40) it is used as active component；Bridging organosilane reagents (1,
Bis- (triethoxy silicon substrate) ethane-BTSE of 2-) it is organosilane precursor；Nonionic surfactant (P123, M=5800) conduct
Structure directing agent；3- mercaptopropyl-trimethoxy silane (MPTMS) is silylating reagent, is combined using an one-step hydrolysis cocondensation
Hydrothermal technology design is prepared for a kind of organosilicon composite wood based on phosphotungstic acid and sulfonic acid funtionalized with meso-hole structure
Material.
The present invention has followingization with organic silicon composite based on phosphotungstic acid and sulfonic acid funtionalized of meso-hole structure
Learn composition: H3PW12O40/SO3H-C3H6-Si(OH)3-m(SiO)m-(HO)3-n(SiO)nSi-C2H4-Si(OSi)n(OH)3-n, it may be assumed thatpr-SO3H-PMO/H3PW12O40。
The preparation method of organic silicon composite based on phosphotungstic acid and sulfonic acid funtionalized with meso-hole structure, by following
Step and condition are completed:
(1) weighed 1.0 g P123 is dissolved in the 30 mL dilute hydrochloric acid that concentration is 0.5 mol/L, is placed on heating
In magnetic stirring apparatus, 40 DEG C are then heated the solution to, and is stirred continuously until that P123 all lead containing structure by dissolution acquisition
To the clear solution of agent；
(2) 3.0 g KCl are weighed to pour into clear solution described in step 1, are added dropwise 1.8 thereto again after 30 min
0.39 mL(3- mercaptopropyi is added dropwise in mL BTSE respectively after 45 min)-trimethoxy silane (MPTMS) and 3.6 mL
H2O2.At this point, mixed liquor has gelatin phenomenon generation, stirring dynamics is increased, the gel to be formed is promoted to stir evenly；
After (3) 1 h, by H3PW12O40(0.2 g, 0.4 g, 0.6 g, 0.8 g) dissolution fills corresponding amount distilled water (2.5
ML, 5.0 mL, 7.5 mL, 10 mL) another small beaker in, then with rubber head dropper by H3PW12O40Aqueous solution drips dropwise
It is added in gel described in step 2；Continue heating stirring under the conditions of 40 DEG C, gel is made to be gradually converted into colloidal sol；
After (4) 24 h, colloidal sol described in step 3 is poured into the reaction kettle of 100 mL polytetrafluoroethyllining linings, 100 DEG C of items
24 h of hydro-thermal reaction under part.Beaker is poured into after cooling and is put into 80 DEG C of 10 h of drying in vacuum oven, obtains white solid object
Matter；
(5) by solid matter described in the step 4 after drying at 80 DEG C with 80 mL dehydrated alcohol reflux extractions, to add
Fast extraction process, every time be added the dense HCl of 0.5 mL, the solid matter being centrifugated in the above mixed liquor, this step in triplicate,
7 h every time, thoroughly to remove the structure directing agent P123 in solid matter；
(6) solid matter for removing structure directing agent is placed in a vacuum drying oven 80 DEG C to be dried overnight, obtains white powder
Shape solid composite material, final product are usedpr-SO3H-PMO/H3PW12O40- x indicates that x represents H3PW12O40Loading.
It is detected, is obtainedpr-SO3H-PMO/H3PW12O40H in-x3PW12O40Content be x=9.35,11.69,20.67,
23.14 wt%, result are obtained by ICP-AES,pr-SO3H-PMO/H3PW12O40For ordered mesopore structure, average pore size exists
4.82-5.33 nm。
pr-SO3H-PMO/H3PW12O40Catalytic effect evaluation --- to be carried out to benzhydrol and α-nitro dithio keteal
Carbon carbon coupling reaction be probe experiment.
Test base stock used: to benzhydrol, α-nitro dithio keteal, acetonitrile and normal octane.Experiment is used multiple
Condensation material ispr-SO3H-PMO/H3PW12O40- x(x=9.35,11.69,20.67,23.14 wt%), have rated different H3PW12O40
The catalytic activity of load capacity composite material.
Composite material is put into 110 DEG C of 2 h of vacuum drying in a vacuum drying oven before catalysis test.
pr-SO3H-PMO/H3PW12O40Catalysis is to benzhydrol and α-nitro dithio keteal carbon carbon coupling reaction in band
Have in 25 mL, two mouthfuls of round-bottomed flasks of condenser pipe through row.By 100 mg catalyst, 182 mg(1 mmol) to benzhydrol, 198
Mg(1.2 mmol) α-nitro dithio keteal and 0.172 mL(1 mmol) normal octane (making internal standard) is added sequentially to round bottom burning
In bottle, it is placed in the magnetic stirring apparatus with heating, flow back 12 h under the conditions of 70 DEG C.1 difference H of table3PW12O40Load capacitypr-SO3H-
PMO/H3PW12O40Yield and the choosing to benzhydrol and α-nitro dithio keteal reaction conversion ratio and coupled product of catalysis
Selecting property.
Table 1
The target product of acquisition is analyzed, analysis condition: chromatographic column Agilent with gas chromatograph Agilent GC6890
19091N-133 HP-INNOWAX Polyethylene Glycol, fid detector, injector temperature are 250 DEG C, detector
Temperature be 280 DEG C, gas-chromatography carry out it is qualitative to benzhydrol, to benzhydrol conversion ratio analyze, gas phase data analysing method
Using normalization method.
The result of analytical table 1 is as it can be seen that composite materialpr-SO3H-PMO/H3PW12O40Catalysis is to benzhydrol and α-nitro two
The reaction specificity that ketene thioacetal carries out the coupling of carbon carbon is good, high conversion rate, and reaction process cleaning is suitable for industrialization promotion；In addition,pr-SO3H-PMO/H3PW12O40H in -23.14 composite materials3PW12O40Load capacity almost be saturated, be catalyzed reaction yield
Also it has no and significantly improves, it is contemplated that economic cost problem, we finally determine and usepr-SO3H-PMO/H3PW12O40- 20.67 are
Dreamboat composite material.
Detailed description of the invention
Fig. 1 is organic silicon composite based on phosphotungstic acid and sulfonic acid funtionalized with meso-hole structure of the inventionpr-
SO3H-PMO/H3PW12O40- 20.67 perpendicular to cellular structure TEM scheme.By figure it can be found that composite material has apparent two
The ordered mesopore structure of six sides (p6mm) is tieed up, it is mesoporous to be evenly distributed and in ordered arrangement.
Specific embodiment:
(1) weighed 1.0 g P123 is dissolved in the 30 mL dilute hydrochloric acid that concentration is 0.5 mol/L, is placed on heating
In magnetic stirring apparatus, 40 DEG C are then heated the solution to, and is stirred continuously until that P123 all lead containing structure by dissolution acquisition
To the clear solution of agent；
(2) 3.0 g KCl are weighed to pour into clear solution described in step 1, are added dropwise 1.8 thereto again after 30 min
0.39 mL(3- mercaptopropyi is added dropwise in mL BTSE respectively after 45 min)-trimethoxy silane (MPTMS) and 3.6 mL
H2O2.At this point, mixed liquor has gelatin phenomenon generation, stirring dynamics is increased, the gel to be formed is promoted to stir evenly；
After (3) 1 h, by 0.6 g H3PW12O40Dissolution fills in another small beaker of 7.5 mL of corresponding amount distilled water, with
Use rubber head dropper by H afterwards3PW12O40Aqueous solution is added drop-wise to dropwise in gel described in step 2；Continue to heat under the conditions of 40 DEG C
Stirring, makes gel be gradually converted into colloidal sol；
After (4) 24 h, sol solution described in step 3 is poured into the reaction kettle of 100 mL polytetrafluoroethyllining linings, 100
24 h of hydro-thermal reaction under the conditions of DEG C.Beaker is poured into after cooling and is put into 80 DEG C of 10 h of drying in vacuum oven, and it is solid to obtain white
Body substance；
(5) by solid matter described in the step 4 after drying at 80 DEG C with 80 mL dehydrated alcohol reflux extractions, to add
Fast extraction process, every time be added the dense HCl of 0.5 mL, the solid matter being centrifugated in the above mixed liquor, this step in triplicate,
7 h every time, thoroughly to remove the structure directing agent P123 in solid matter；
(6) solid matter for removing structure directing agent is placed in a vacuum drying oven 80 DEG C to be dried overnight, obtains white powder
Shape solid composite material, final product are usedpr-SO3H-PMO/H3PW12O40- 20.67 indicate.
Claims (2)
1. a kind of organic silicon composite based on phosphotungstic acid and sulfonic acid funtionalized with meso-hole structure, which is characterized in that tool
It is made of following below formula: H3PW12O40/SO3H-C3H6-Si(OH)3-m(SiO)m-(HO)3-n(SiO)nSi-C2H4-Si(OSi)n
(OH)3-n, it may be assumed that pr-SO3H-PMO/H3PW12O40, wherein pr expression-CH2CH2CH2Group, PMO are organosilicon.
2. the organosilicon composite wood based on phosphotungstic acid and sulfonic acid funtionalized according to claim 1 with meso-hole structure
The preparation method of material is completed by following steps and condition:
(1) weighed 1.0g P123 is dissolved in the 30mL dilute hydrochloric acid that concentration is 0.5mol/L, is placed on the magnetic agitation with heating
In device, 40 DEG C are then heated the solution to, and is stirred continuously until that all dissolution is obtained containing the clear of structure directing agent P123
Clear solution；
(2) it weighs 3.0g KCl to pour into clear solution described in step (1), 1.8mL is added dropwise after 30min thereto again
The H of 0.39mL (3- mercaptopropyi)-trimethoxy silane (MPTMS) and 3.6mL is added dropwise in BTSE respectively after 45min2O2, this
When, mixed liquor has gelatin phenomenon generation, increases stirring dynamics, the gel to be formed is promoted to stir evenly；
(3) after 1h, by H3PW12O40Dissolution fills in another small beaker of corresponding amount distilled water, wherein H3PW12O40Quality be
The distilled water volume of 0.2g, 0.4g, 0.6g or 0.8g, corresponding amount are 2.5mL, 5.0mL, 7.5mL or 10mL, are then dripped with rubber head
Pipe is by H3PW12O40Aqueous solution is added drop-wise to dropwise in gel described in step (2)；Continue heating stirring under the conditions of 40 DEG C, makes to coagulate
Glue is gradually converted into colloidal sol；
(4) after for 24 hours, colloidal sol described in step (3) is poured into the reaction kettle of 100mL polytetrafluoroethyllining lining, under the conditions of 100 DEG C
Hydro-thermal reaction for 24 hours, pours into beaker after cooling and is put into 80 DEG C of dry 10h in vacuum oven, obtain white solid matter；
(5) solid matter described in the step (4) after drying is used to the reflux extraction of 80mL dehydrated alcohol at 80 DEG C, to accelerate extraction
Take process, every time be added the dense HCl of 0.5mL, the solid matter being centrifugated in the above mixed liquor, this step in triplicate, every time
7h, thoroughly to remove the structure directing agent P123 in solid matter；
(6) solid matter for removing structure directing agent is placed in a vacuum drying oven 80 DEG C to be dried overnight, it is solid obtains white powder
Composite material, final product pr-SO3H-PMO/H3PW12O40-xIt indicates, x represents H3PW12O40Loading, x=9.35,
11.69,20.67,23.14wt%, result are obtained by ICP-AES.
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| CN110369003B (en) * | 2019-07-25 | 2022-02-01 | 长春工业大学 | Titanium-silicon phosphotungstate composite material with mesoporous structure and preparation method thereof |
| CN111804335A (en) * | 2020-07-09 | 2020-10-23 | 长春工业大学 | Phosphotungstic acid and propylsulfonic acid functionalized silicon oxide composite material in non-hydrochloric acid system and preparation method thereof |
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