CN106276964A - ZSM-5 molecular sieve that a kind of intracrystalline is phosphorous and preparation method thereof - Google Patents
ZSM-5 molecular sieve that a kind of intracrystalline is phosphorous and preparation method thereof Download PDFInfo
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Abstract
The invention provides the ZSM-5 molecular sieve that a kind of intracrystalline is phosphorous, phosphorus content 0.5～7wt%, total pore volume is 0.35～0.60mL/g, and specific surface area is 400～600m2/g.This molecular sieve is organophosphor template to be mixed with aluminum source, processes and obtains intermediate product, then mixed homogeneously with organic formwork agent, silicon source, deionized water by intermediate product and carry out what hydrothermal crystallizing obtained in closed reactor.
Description
Technical field
The present invention is about a kind of phosphorous ZSM-5 molecular sieve and preparation method thereof, be in particular about
Under ZSM-5 molecular sieve that a kind of intracrystalline is phosphorous and a kind of alkali metal-free synthetic system, preparation has a large amount of secondary
The method of the ZSM-5 molecular sieve that mesoporous intracrystalline is phosphorous.
Background technology
ZSM-5 molecular sieve is the mesoporous molecular sieve of a kind of high silicon 3 D straight channel with MFI structure, its tool
There is the pore passage structure of uniqueness, and have good shape selective catalysis and isomerization performance, high thermal stability, Gao Bibiao
Area, wide silica alumina ratio excursion, unique surface acidity and the feature of relatively low knot carbon amounts, be widely used as
Catalyst and catalyst carrier, and it is used successfully to alkylation, isomerization, disproportionation, catalytic cracking, methanol system
The production technology such as gasoline, methanol-to-olefins.
The synthetic system of ZSM-5 molecular sieve generally uses inorganic base (such as sodium hydroxide) to form applicable molecule
Alkaline environment needed for sieve crystallization, the molecular sieve of synthesis is sodium form ZSM-5, it is necessary to exchange ability through ion
It is transformed into hydrogen type molecular sieve catalyst.Ion-exchange process produces a large amount of ammonia-nitrogen sewages and acid-bearing wastewater, to life
Produce enterprise and cause the biggest environmental protection pressure.
It is modified that ZSM-5 molecular sieve introduces appropriate phosphorus-containing compound in post synthesis, can be at harsh hydrothermal condition
Under can slow down framework dealumination, and prepare catalyst as active component, be mainly used in increasing propylene yield and
Improve catalytic cracking process (FCC) and the DCC of light olefin maximum production of octane number
(DCC) process.Propylene, butylene yield quite on the premise of, make dry gas, cracking light oil and coke equal
Having and decline by a relatively large margin, significantly increase the productivity of high added value gasoline, output more has significant economic benefit.
Wherein phosphorus content is generally in the range of 1～7wt%.
Use phosphorus compound carries out the most popular method of post-modification to the Hydrogen ZSM-5 molecular sieve of synthesis and is
First obtain Hydrogen ZSM-5 molecular sieve with ammonium ion exchange sodium form molecular sieve, entered by phosphoric acid or phosphate afterwards
Row activation, obtains (H4PO4)+(ZSM-5)-, then obtain ' P ' ZSM-5 through roasting, produced by grinding
Product serosity prepares catalyst, and whole technological process environmental pollution is serious, flow process is complicated, energy consumption is high.
Using direct synthesis technique preparation without the phosphorous ZSM-5 molecular sieve of sodium, people have been also carried out attempting.
CN102311130A disclose a kind of using silicon source, aluminum source, organic phosphorus oxygen class surfactant as template and
Water plastic according to a certain percentage, crystallization, filter, dry, calcination process, i.e. can get a kind of phosphorous ZSM-5
Molecular sieve, but still use sodium hydroxide or potassium hydroxide are as inorganic base, for sodium form ZSM-5 molecular sieve.
Nichiappan lingappan etc. (Bull.Chem.Soc.Jpn, 1996,69,1125-1128)
Use quaternary alkylphosphonium salt as template, carry out calcination process after synthesis, i.e. obtain phosphorous ZSM-5 molecular sieve,
Wherein phosphorus content is in 0.4～0.6wt% scope, but quaternary alkylphosphonium salt generally uses three replacement phosphorus and the halogen acids system of reacting
Standby, price is high.CN101468808 disclose a kind of from silicon source, aluminum source, organic amine template, acidity
The method directly preparing phosphorous ZSM-5 molecular sieve in the mixed system of phosphorus source, explores phosphorus containing molecular sieve and exists
Reflex action in linear paraffin tetradecane cracking, but the preparation method described in this patent still employs in a large number
Organic amine template, and introduce alkalinous metal.Said method all uses sodium hydroxide or potassium hydroxide to make
For inorganic alkali source.
Summary of the invention
The present inventor on the basis of lot of experiments it was unexpectedly observed that include organophosphor template when employing
Agent and be different from the ZSM-5 molecular sieve obtained by interior preparation process such as convenient source order by merging, has
Big specific surface area and pore volume and the phosphorous feature of intracrystalline, based on this, form the present invention.
Therefore, an object of the present invention is to provide a kind of phosphorous ZSM-5 molecule being different from prior art
Sieve；The two of the purpose of the present invention are to provide the ZSM-5 molecule that the described intracrystalline being different from prior art is phosphorous
The preparation method of sieve.
One of to achieve these goals, the ZSM-5 molecular sieve that a kind of intracrystalline that the present invention provides is phosphorous, phosphorus
Content 0.5～7wt%, total pore volume is 0.35～0.60mL/g, and specific surface area is 400～600m2/g。
Two to achieve these goals, the preparation method method that the present invention provides, comprise the following steps:
(1) will be selected from tetrabutyl phosphonium bromide phosphine, tetrabutylphosphonium chloride, tetrabutylammonium hydroxide phosphorus, hexamethyl phosphinylidyne
The organophosphor template of one or more of triamine mixes with aluminum source, in described organophosphor template and aluminum source
Al2O3Mol ratio be 0.1～40:1, by mixture in closed reactor in 50～300 DEG C process
0.1～10h obtains intermediate product, and described aluminum source is selected from the aluminum source without alkali metal ion；
(2) by the intermediate product of step (1) with selected from tetraethyl ammonium hydroxide, tetraethylammonium bromide, four
Ethyl ammonium chloride, tetraethyl ammonium fluoride, TPAOH, Tetramethylammonium hydroxide, tetramethyl bromination
The organic formwork agent of one or more, silicon source in ammonium TPAOH and TBAH, go
Ionized water mix homogeneously, in mixture in mol, SiO2/Al2O3=25～1000, organic formwork agent/SiO2
=0.01～10, H2O/SiO2=2～20；
(3) mixture that step (2) obtains moves to carry out at 50～200 DEG C in closed reactor hydro-thermal
Product is also reclaimed in crystallization 10～200 hours.
Phosphorous ZSM-5 molecular sieve of intracrystalline of the present invention and preparation method thereof, has a following feature:
(1) decrease existing alkali metal containing technical system to need ammonium exchange, filter a series of process, and
During being directly synthesized, introduce phosphide, simplify the preparation flow such as roasting, grinding,
Using the raw material of alkali free metal ion as synthesis material, add organic formwork agent, first in batches
Allow the mixture in a part of phosphorous template and aluminum source through hydrothermal treatment consists, then with another portion
Point organic formwork agent mixes with silicon source, and wherein the phosphorous template of Part I plays structure and leads
To the effect of agent, Part II organic formwork agent plays the effect of structure inducer.
(2) have employed the synthesis route different from existing alkali metal-free technical system, and in synthesis
During be introduced directly into phosphorus, in building-up process, phosphorus can directly and skeleton four-coordination aluminum effect
Generate the ZSM-5 molecular sieve that intracrystalline is phosphorous.
(3) abandoned the Alusil of high cost as silicon source and aluminum source, the most still can obtain phosphorous
ZSM-5 molecular sieve, and have substantial amounts of secondary mesopore to generate, reduce synthesis cost, letter
Change the technological process of the phosphorus post-modification that routine techniques needs.
Accompanying drawing explanation
Fig. 1 is the XRD spectra of the phosphorous ZSM-5 molecular sieve of the present invention.
Fig. 2 is the SEM photograph figure of the phosphorous ZSM-5 molecular sieve of the present invention.
Fig. 3 is the adsorption desorption curve of the phosphorous ZSM-5 molecular sieve of the present invention.
Fig. 4 is the graph of pore diameter distribution of the phosphorous ZSM-5 molecular sieve of the present invention.
Fig. 5 is the phosphorous ZSM-5 molecular sieve of the present invention27Al MAS-NMR spectrogram.
Fig. 6 is organophosphor template13C NMR spectra.
Fig. 7 is tetraethyl ammonium hydroxide13C NMR spectra.
Fig. 8 is the phosphorous ZSM-5 molecular sieve of the present invention13C MAS-NMR spectrogram.
Fig. 9 is Tetramethylammonium hydroxide13C NMR spectra.
Figure 10 is the phosphorous ZSM-5 molecular sieve of the present invention13C MAS-NMR spectrogram.
Detailed description of the invention
The phosphorous ZSM-5 molecular sieve of intracrystalline that the present invention provides, phosphorus content 0.5～7wt%, total pore volume is
0.35～0.60mL/g, specific surface area is 400～600m2/g。
Wherein, the preferred total pore volume of molecular sieve of the present invention is 0.35～0.50mL/g, specific surface area be 400～
500m2/g.In addition to the pore size of ZSM-5 itself, in the range of 2～50nm, generate a certain amount of two
Secondary mesoporous, the adsorption desorption curve and the graph of pore diameter distribution that record from BET method can deduce.
Described intracrystalline is phosphorous, and it is defined as directly the phosphorus in organic phosphine template being incorporated into ZSM-5 molecule
In the building-up process of sieve, enter intracrystalline and interact with framework aluminum.We are obtained by template and synthesis
ZSM-5 molecular sieve13C MAS-NMR spectrogram is analyzed, if the carbon geochemistry of the molecular sieve prepared
Form is the superposition of two kinds of template, illustrates that phosphorus is incorporated in the building-up process of molecular sieve, and observation point simultaneously
Son sieve27Al MAS-NMR spectrogram, if the chemical form of aluminum is skeleton four-coordination aluminum, then explanation phosphorus enters
Molecular sieve intracrystalline also interacts with framework aluminum.
Present invention also offers the preparation method of the phosphorous ZSM-5 molecular sieve of above-mentioned intracrystalline, comprise the following steps:
(1) will be selected from tetrabutyl phosphonium bromide phosphine, tetrabutylphosphonium chloride, tetrabutylammonium hydroxide phosphorus, hexamethyl phosphinylidyne
The organophosphor template of one or more of triamine mixes with aluminum source, in described organophosphor template and aluminum source
Al2O3Mol ratio be 0.1～40:1, by mixture in closed reactor in 50～300 DEG C process
0.1～10h obtains intermediate product, and described aluminum source is selected from the aluminum source without alkali metal ion；
(2) by the intermediate product of step (1) with selected from tetraethyl ammonium hydroxide, tetraethylammonium bromide, four
Ethyl ammonium chloride, tetraethyl ammonium fluoride, TPAOH, Tetramethylammonium hydroxide, tetramethyl bromination
The organic formwork agent of one or more, silicon source in ammonium TPAOH and TBAH, go
Ionized water mix homogeneously, in mixture in mol, SiO2/Al2O3=25～1000, organic formwork agent/SiO2
=0.01～10, H2O/SiO2=2～20；
(3) mixture that step (2) obtains moves to carry out at 50～200 DEG C in closed reactor hydro-thermal
Product is also reclaimed in crystallization 10～200 hours.
The method of the present invention, the organic phosphorous template described in step therein (1) selected from tetrabutyl phosphonium bromide phosphine,
Tetrabutylphosphonium chloride, tetrabutylammonium hydroxide phosphorus, HMPA one or more, the preferably tetrabutyl
Phosphonium hydroxide.Described aluminum source is the aluminum source without alkali metal ion.The art is generally, it is considered that described
Without alkali metal ion, be just it is believed that do not contain when the content of alkali metal ion is less than 0.10 weight %
Alkali metal ion.The described aluminum source without alkali metal ion is selected from boehmite, aluminium oxide, hydroxide
One or more of aluminum；Organic phosphorous template and the Al in aluminum source2O3Mol ratio be 0.1～40:1,
It is preferably 0.5～30:1.
The method of the present invention, the organic formwork agent described in step therein (2) selected from tetraethyl ammonium hydroxide,
Tetraethylammonium bromide, tetraethylammonium chloride, tetraethyl ammonium fluoride, TPAOH, tetramethyl hydrogen-oxygen
One or more of change ammonium, 4 bromide, TPAOH and TBAH, wherein
Preferably tetraethyl ammonium hydroxide, Tetramethylammonium hydroxide.Described silicon source can be selected from silica gel and/or white carbon,
Wherein preferred silica gel.The intermediate product of described step (2) uniformly mixes with silicon source and water, in mixture with
Mole meter, SiO2/Al2O3It is 25～1000, preferably 40～600, organic formwork agent/SiO2Be 0.01～10,
Preferably 0.01～8, H2O/SiO2It is 2～20, preferably 4～15.
The method of the present invention, mixture described in step (3), in airtight reactor, preferably exist
130～200 DEG C process 15～200 hours.
The method of the present invention, step (3) is described reclaims product, and its process is well known to those skilled in the art,
Generally include filtration, wash, be dried and the process of roasting.Described drying means and condition are usual doing
Drying method and condition, such as, be dried 4～24 hours in baking oven 100～120 DEG C.Described method of roasting and bar
Conventional method that part is used by molecular sieve activation and condition, such as, at Muffle kiln roasting, sintering temperature is
530～550 DEG C, roasting time is 2～6 hours.
The ZSM-5 molecular sieve that intracrystalline prepared by the inventive method is phosphorous, its SiO2/Al2O3Mol ratio be 25～
1000, relative crystallinity is at least 85%, and particle size distribution is uniform, has big specific surface area and hole body
Long-pending, and have substantial amounts of secondary mesopore to generate in the range of 2～50nm, in molecular sieve phosphorus content be 0.5～
7.0wt%.
Below by comparative example and embodiment, the present invention will be further described, but the most therefore limits this
Bright content.
In an embodiment, the chemical composition of molecular sieve has x-ray fluorescence method to measure.
Described relative crystallinity is to compose with the X-ray diffraction (XRD) of products therefrom and ZSM-5 molecular sieve standard specimen
The ratio of the peak area sum of 2 θ of figure, five characteristic diffraction peaks between 22.5～25.0 ° is with percent
Representing, the ZSM-5 molecular sieve using the method synthesis of embodiment 1 in CN1056818C is standard specimen, by it
Degree of crystallinity is set to 100%.X-ray diffraction spectrogram measures on Rigaku TTR-3 powder x-ray diffraction,
Instrument parameter: copper target (tube voltage 40kV, tube current 250mA), scintillation counter, step width 0.02 °,
Sweep speed 0.4 (°)/min.
AS-3, the AS-6 static nitrogen that nitrogen adsorption desorption curve produces in Quantachrome instrument company is inhaled
Attached instrument.Instrument parameter: sample is placed in sample processing system, is evacuated to 1.33 × 10 at 300 DEG C-2Pa,
Heat-insulation pressure keeping 4h, purifies sample.At liquid nitrogen temperature-196 DEG C, test purifies sample and is pressing P/P the most on year-on-year basis0
Under the conditions of to the adsorbance of Angel and desorption rate, it is thus achieved that N2 adsorption-desorption isothermal curve.Then two ginsengs are utilized
Number BET formula calculates specific surface area, takes the pore volume that adsorbance is sample than pressure P/P0 ≈ less than 0.98,
BJH formula is utilized to calculate the pore-size distribution of hollow sections.
Liquid NMR (13C NMR) at Varian UNITY INOVA 500MHz type nuclear magnetic resonance, NMR
Measure on spectrometer.Test condition: use solid double resonance probe, Φ 4mm ZrO2Rotor.Experiment parameter:
Test temperature is room temperature, scanning times nt=5000, pulse width pw=3.9 μ s, spectrum width sw=31300Hz,
The resonant frequency Sfrq=125.64MHz of observing nuclear, sampling time at=0.5s, chemical shift calibration δTMS=0,
Time delay d1=4.0s, mode dm=nny of uncoupling (inverted gated decoupling), deuterochloroform lock field.
In molecular sieve aluminum and carbon geochemistry form solid state nmr (27Al,13C MAS-NMR) spectrogram is at Bruker
Measure on AVANCE III 600WB type nuclear magnetic resonance chemical analyser.Instrument parameter: use solid double resonance to visit
Head, Φ 6mm ZrO2Rotor.27The resonant frequency 78.155MHz of Al detection nuclear-magnetism, evil spirit angle rotating speed is 5kHz,
Pulsewidth 1.6 μ s (pulls angle down for corresponding 20 °), circulation delay time 1s, scanning times 8000 times；13C detects core
Resonance spectrum be 125.74MHz, wherein1H decouples power 80KHz；1H excites pulsewidth to be that 2.65 μ s are (right
90 ° are answered to pull angle down), circulation delay time 5s, scanning times 8000 times.
Comparative example
Weigh 1.0g boehmite (Beijing Chemical Plant, analytical pure, Al2O3Content is 70%), by its with
14.3g TPAOH (Chemical Reagent Co., Ltd., Sinopharm Group, analytical pure, TPAOH content 25%)
Mixing, mixture mol ratio TPAOH/Al2O3=2.4, it is placed in the crystallizing kettle containing polytetrafluoro lining,
With 150 DEG C in react and be cooled to room temperature after 4h after, by it, (Qingdao Haiyang chemical industry is limited with 20.0g silica gel
Company, SiO2Content 99.1%) and 15.0g water mix homogeneously, mixture mol ratio SiO2/Al2O3=40,
H2O/SiO2=7.0.Mixture carries out hydrothermal crystallizing 50h in 150 DEG C in autoclave, filters by centrifugation
After in 110 DEG C dry 20h, 550 DEG C of roasting 3h.
Product is through analyzing, and it is ZSM-5 molecular sieve, but does not generates secondary mesopore, and total pore volume is 0.21mL/g,
Specific surface area is 348m2/g。
Embodiment 1
Weigh 0.8g aluminium oxide (Chang Ling catalyst plant, Al2O3Content is 98%), by itself and 16.8g tetra-fourth
Base phosphonium hydroxide (Chemical Reagent Co., Ltd., Sinopharm Group, analytical pure, TBPOH content 40%), mixture
Mol ratio TBPOH/Al2O3=2.4, be placed in the crystallizing kettle containing polytetrafluoro lining, with 150 DEG C in anti-
It is cooled to room temperature after answering 4 hours and obtains intermediate product.By intermediate product and 20g silica gel (Qingdao Haiyang chemical industry
Company limited, SiO2Content 99.1%), (A Aifasha chemistry has 7.9g tetraethyl ammonium hydroxide aqueous solution
Limit company, analytical pure, TEAOH content 35%) mix and 21.0g water mix homogeneously, mixture mol ratio
SiO2/Al2O3=40, TEAOH/SiO2=0.06, H2O/SiO2=7.0.Mixture in autoclave in 150
DEG C carry out hydrothermal crystallizing 50h.After crystallization synthesis phosphorous ZSM-5 molecular sieve by centrifugation, filter after in 110
DEG C dry 20h, 550 DEG C of roasting 3h, obtain sieve sample ZP-1.
The XRD spectra of ZP-1 is shown in Fig. 1, illustrates that it is ZSM-5 molecular sieve, and degree of crystallinity is 87.0, silica alumina ratio
Being 43.0, total pore volume is 0.450mL/g, and specific surface area is 480m2/ g, phosphorus content 5.6wt%.
The SEM photograph of ZP-1 is shown in Fig. 2, and as can be seen from Figure 2, zeolite crystal size is 2～5um, and pattern is
Bulk, is evenly distributed.
The adsorption desorption curve of ZP-1 and graph of pore diameter distribution are shown in Fig. 3 and Fig. 4 respectively, illustrate that the ZSM-5 of synthesis divides
Son sieve generates a certain amount of secondary mesopore at the 2nm of aperture.
ZP-1's27Al MAS-NMR spectrogram is shown in Fig. 5.From fig. 5, it can be seen that there are two kinds of different skeleton calorizes
Learn morphologization displacement study, respectively 54.0 and 51.0, wherein, chemical shift four-coordination bone at 51.0
The phosphorus coordination of frame aluminum and tetrabutylammonium hydroxide phosphorus, and chemical shift four-coordination framework aluminum at 54.0 and tetrem
The nitrogen coordination of base ammonium hydroxide, tetrabutylammonium hydroxide phosphorus plays the effect of structure directing agent in building-up process.
Tetrabutylammonium hydroxide phosphorus, tetraethyl ammonium hydroxide13C MAS-NMR's and ZP-113C MAS-NMR
Spectrogram is shown in Fig. 6, Fig. 7 and Fig. 8 respectively.Knowable to the comparison of spectrogram, the chemical shift of the carbon of ZP-1 is basic
For superposing of tetrabutylammonium hydroxide phosphorus and tetraethyl ammonium hydroxide both template chemical shifts, simply spectral peak
Occur widthization, illustrate tetrabutylammonium hydroxide phosphorus four-coordination phosphorus entrance molecular sieve intracrystalline and with skeleton four-coordination
Aluminum effect.
Embodiment 2
Weigh 0.36g boehmite (Chang Ling catalyst plant, Al2O3Content is 70%), by itself and 25.1g
Tetrabutylammonium hydroxide phosphorus (Chemical Reagent Co., Ltd., Sinopharm Group, analytical pure, TBPOH content 40%), mixed
Compound mol ratio TBPOH/Al2O3=8, it is placed in the crystallizing kettle containing polytetrafluoro lining, and in 160 DEG C
It is cooled to room temperature after reacting 2 hours and obtains intermediate product.By intermediate product and 20g silica gel (Qingdao Haiyang
Work company limited, SiO2Content 99.1%), 10.0g tetraethyl ammonium hydroxide aqueous solution (A Aifasha chemistry
Company limited, analytical pure, TEAOH content 35%) mix and 25.8g water mix homogeneously, mixture mol ratio
SiO2/Al2O3=100, TEAOH/SiO2=0.08, H2O/SiO2=9.0.Mixture in autoclave in 160
DEG C carry out hydrothermal crystallizing 48h.After crystallization synthesis phosphorous ZSM-5 molecular sieve by centrifugation, filter after in 110
DEG C dry 20h, 550 DEG C of roasting 3h, obtain sieve sample ZP-2.
ZP-2 sample has the feature of Fig. 1, Fig. 2, Fig. 3, Fig. 5 and Fig. 8, illustrates that it is ZSM-5 molecule
Sieve, degree of crystallinity is 88.0, and silica alumina ratio is 105.0, and total pore volume is 0.500mL/g, and specific surface area is
460m2/ g, phosphorus content 5.3wt%, generate secondary mesopore, tetrabutylammonium hydroxide phosphorus at the 3.0nm of aperture
Four-coordination phosphorus enter molecular sieve intracrystalline and with skeleton four-coordination aluminum interact.
Embodiment 3
Weigh 0.3g aluminium hydroxide (Beijing Chemical Plant, analytical pure, Al2O3Content is 35%), by its with
31.5g tetrabutylammonium hydroxide phosphorus (Chemical Reagent Co., Ltd., Sinopharm Group, analytical pure, TBPOH content 40%),
Mixture mol ratio TBPOH/Al2O3=12, it is placed in the crystallizing kettle containing polytetrafluoro lining, with 170
It is cooled to room temperature after reacting 3 hours in DEG C and obtains intermediate product.By intermediate product and 20g silica gel (Qing Daohai
Ocean Chemical Co., Ltd., SiO2Content 99.1%), 7.8g tetraethyl ammonium hydroxide aqueous solution (A Aifasha
Chemical Co., Ltd., analytical pure, TEAOH content 35%) mix and 18.0g water mix homogeneously, mixture rubs
You compare SiO2/Al2O3=200, TEAOH/SiO2=0.06, H2O/SiO2=8.0.Mixture is in autoclave
Hydrothermal crystallizing 60h is carried out in 170 DEG C.After crystallization synthesis phosphorous ZSM-5 molecular sieve by centrifugation, filter after
Dry 20h, 550 DEG C of roasting 3h in 110 DEG C, obtain sieve sample ZP-3.
ZP-3 sample has the feature of Fig. 1, Fig. 2, Fig. 3, Fig. 5 and Fig. 8, illustrates that it is ZSM-5 molecule
Sieve, degree of crystallinity is 89.0, and silica alumina ratio is 196.0, and total pore volume is 0.520mL/g, and specific surface area is
500m2/ g, phosphorus content 4.6wt%, generate secondary mesopore, tetrabutylammonium hydroxide phosphorus at the 5.0nm of aperture
Four-coordination phosphorus enter molecular sieve intracrystalline and with skeleton four-coordination aluminum interact.
Embodiment 4
Weigh 0.3g aluminium hydroxide (Beijing Chemical Plant, analytical pure, Al2O3Content is 35%), by its with
12.5g tetrabutylammonium hydroxide phosphorus (Chemical Reagent Co., Ltd., Sinopharm Group, analytical pure, TBPOH content 40%),
Mixture mol ratio TBPOH/Al2O3=24, it is placed in the crystallizing kettle containing polytetrafluoro lining, with 170
It is cooled to room temperature after reacting 3 hours in DEG C and obtains intermediate product.By intermediate product and 20g silica gel (Qing Daohai
Ocean Chemical Co., Ltd., SiO2Content 99.1%), 10.0g tetraethyl ammonium hydroxide aqueous solution (A Aifasha
Chemical Co., Ltd., analytical pure, TEAOH content 35%) mix and 28.0g water mix homogeneously, mixture rubs
You compare SiO2/Al2O3=400, TEAOH/SiO2=0.06, H2O/SiO2=8.0.Mixture is in autoclave
Hydrothermal crystallizing 60h is carried out in 170 DEG C.After crystallization synthesis phosphorous ZSM-5 molecular sieve by centrifugation, filter after
Dry 20h, 550 DEG C of roasting 3h in 110 DEG C, obtain sieve sample ZP-4.
ZP-4 sample has the feature of Fig. 1, Fig. 2, Fig. 3, Fig. 5 and Fig. 8, illustrates that it is ZSM-5 molecule
Sieve, degree of crystallinity is 89.0, and silica alumina ratio is 380.0, and total pore volume is 0.500mL/g, and specific surface area is
465m2/ g, phosphorus content 4.2wt%, generate secondary mesopore, the four of tetrabutylammonium hydroxide phosphorus at 8.0nm
Coordination phosphorus enters molecular sieve intracrystalline and interacts with skeleton four-coordination aluminum.
Embodiment 5
Weigh 0.3g aluminium oxide (Chang Ling catalyst plant, Al2O3Content is 98%), by itself and 20.2g tetra-fourth
Base phosphonium hydroxide (Chemical Reagent Co., Ltd., Sinopharm Group, analytical pure, TBPOH content 40%), mixture
Mol ratio TBPOH/Al2O3=6.0, be placed in the crystallizing kettle containing polytetrafluoro lining, with 150 DEG C in anti-
It is cooled to room temperature after answering 3 hours and obtains intermediate product.By intermediate product and 20g silica gel (Qingdao Haiyang chemical industry
Company limited, SiO2Content 99.1%), (A Aifasha chemistry has 14.0g tetramethylammonium hydroxide aqueous solution
Limit company, analytical pure, TMAOH content 10%) mix and 11.5g water mix homogeneously, mixture mol ratio
SiO2/Al2O3=60, TMAOH/SiO2=0.05, H2O/SiO2=7.0.Mixture in autoclave in 150
DEG C carry out hydrothermal crystallizing 48h.After crystallization synthesis phosphorous ZSM-5 molecular sieve by centrifugation, filter after in 110
DEG C dry 20h, 550 DEG C of roasting 3h, obtain sieve sample ZP-5.
ZP-5 sample has the feature of Fig. 1, Fig. 2, Fig. 3 and Fig. 5, illustrates that it is ZSM-5 molecular sieve,
Degree of crystallinity is 58.0, and silica alumina ratio is 58.0, and total pore volume is 0.510mL/g, and specific surface area is 530m2/ g,
Phosphorus content 5.2wt%.Secondary mesopore is generated at the 2.5nm of aperture, and in chemical shift 54.0 and 51.0
There are two kinds of different skeleton four-coordination al species in place.
Tetrabutylammonium hydroxide phosphorus, Tetramethylammonium hydroxide13The ZP-5 molecular sieve of C NMR and synthesis13C
MAS-NMR spectrogram is shown in Fig. 6, Fig. 9 and Figure 10 respectively, it is known that the carbon chemical shifts of ZP-5 molecular sieve is essentially
The superposition of two kinds of template (tetrabutylammonium hydroxide phosphorus, Tetramethylammonium hydroxide) chemical shift, simply peak is sent out
Give birth to wideization, illustrated that the four-coordination phosphorus of tetrabutylammonium hydroxide phosphorus enters intracrystalline and the skeleton of ZSM-5 molecular sieve
Four-coordination aluminum effect.
Embodiment 6
Weigh 0.25g boehmite (Chang Ling catalyst plant, Al2O3Content is 70%), by itself and 12.8g
Tetrabutylammonium hydroxide phosphorus (Chemical Reagent Co., Ltd., Sinopharm Group, analytical pure, TBPOH content 40%), mixed
Compound mol ratio TBPOH/Al2O3=9.0, it is placed in the crystallizing kettle containing polytetrafluoro lining, with 170 DEG C
Middle reaction is cooled to room temperature after 2 hours and obtains intermediate product.By intermediate product and 20g silica gel (Qingdao Haiyang
Chemical Co., Ltd., SiO2Content 99.1%), 23.0g tetramethylammonium hydroxide aqueous solution (A Aifashaization
Learn company limited, analytical pure, TMAOH content 10%) mix and 14.5g water mix homogeneously, mixture mole
Compare SiO2/Al2O3=150, TMAOH/SiO2=0.08, H2O/SiO2=8.0.Mixture in autoclave in
170 DEG C carry out hydrothermal crystallizing 48h.After crystallization synthesis phosphorous ZSM-5 molecular sieve by centrifugation, filter after in
Dry 20h, 550 DEG C of roasting 3h, obtain sieve sample ZP-6 for 110 DEG C.
ZP-6 sample has the feature of Fig. 1, Fig. 2, Fig. 3, Fig. 5 and Figure 10, illustrates that it is that ZSM-5 divides
Son sieve, degree of crystallinity is 93.0, and silica alumina ratio is 145.0, and total pore volume is 0.490mL/g, and specific surface area is
5150m2/ g, phosphorus content 4.4wt%, generate secondary mesopore at 3nm, and the four of tetrabutylammonium hydroxide phosphorus join
Position phosphorus enters molecular sieve intracrystalline and interacts with skeleton four-coordination aluminum.
Embodiment 7
Weigh 0.2g aluminium hydroxide (Beijing Chemical Plant, analytical pure, Al2O3Content is 35%), by its with
25.0g tetrabutylammonium hydroxide phosphorus (Chemical Reagent Co., Ltd., Sinopharm Group, analytical pure, TBPOH content 40%),
Mixture mol ratio TBPOH/Al2O3=36, it is placed in the crystallizing kettle containing polytetrafluoro lining, with 150
It is cooled to room temperature after reacting 2 hours in DEG C and obtains intermediate product.By intermediate product and 20g silica gel (Qing Daohai
Ocean Chemical Co., Ltd., SiO2Content 99.1%), 14.0g tetramethylammonium hydroxide aqueous solution (A Aifasha
Chemical Co., Ltd., analytical pure, TMAOH content 10%) mix and 11.5g water mix homogeneously, mixture rubs
You compare SiO2/Al2O3=300, TMAOH/SiO2=0.05, H2O/SiO2=7.5.Mixture is in autoclave
Hydrothermal crystallizing 72h is carried out in 150 DEG C.After crystallization synthesis phosphorous ZSM-5 molecular sieve by centrifugation, filter after
Dry 20h, 550 DEG C of roasting 3h in 110 DEG C, obtain sieve sample ZP-7.
ZP-7 sample has the feature of Fig. 1, Fig. 2, Fig. 3, Fig. 5 and Figure 10, illustrates that it is that ZSM-5 divides
Son sieve, degree of crystallinity is 92.0, and silica alumina ratio is 303.0, and total pore volume is 0.530mL/g, and specific surface area is
470m2/ g, phosphorus content 4.0wt%, generate secondary mesopore at 6nm, and the four of tetrabutylammonium hydroxide phosphorus join
Position phosphorus enters molecular sieve intracrystalline and interacts with skeleton four-coordination aluminum.
Embodiment 8
Weigh 0.05g aluminium hydroxide (Beijing Chemical Plant, analytical pure, Al2O3Content is 35%), by its with
31.5g tetrabutylammonium hydroxide phosphorus (Chemical Reagent Co., Ltd., Sinopharm Group, analytical pure, TBPOH content 40%),
Mixture mol ratio TBPOH/Al2O3=75, it is placed in the crystallizing kettle containing polytetrafluoro lining, with 170
It is cooled to room temperature after reacting 2 hours in DEG C and obtains intermediate product.By intermediate product and 20g silica gel (Qing Daohai
Ocean Chemical Co., Ltd., SiO2Content 99.1%), 25.0g tetramethylammonium hydroxide aqueous solution (A Aifasha
Chemical Co., Ltd., analytical pure, TMAOH content 10%) mix and 11.0g water mix homogeneously, mixture rubs
You compare SiO2/Al2O3=500, TMAOH/SiO2=0.09, H2O/SiO2=10.0.Mixture is at autoclave
In carry out hydrothermal crystallizing 48h in 170 DEG C.After crystallization synthesis phosphorous ZSM-5 molecular sieve by centrifugation, filter
After in 110 DEG C dry 20h, 550 DEG C of roasting 3h, obtain sieve sample ZP-8.
ZP-8 sample has the feature of Fig. 1, Fig. 2, Fig. 3, Fig. 5 and Figure 10, illustrates that it is that ZSM-5 divides
Son sieve, degree of crystallinity is 95.0, and silica alumina ratio is 496.0, and total pore volume is 0.490mL/g, and specific surface area is
450m2/ g, phosphorus content 3.5wt%, generate secondary mesopore at 10.0nm, tetrabutylammonium hydroxide phosphorus
Four-coordination phosphorus enters molecular sieve intracrystalline and interacts with skeleton four-coordination aluminum.
Claims (11)
1. the ZSM-5 molecular sieve that intracrystalline is phosphorous, phosphorus content 0.5～7wt%, total pore volume be 0.35～
0.60mL/g, specific surface area is 400～600m2/g。
2. according to the molecular sieve of claim 1, its SiO2/Al2O3Mol ratio is 25～1000, and relative crystallinity is extremely
It is 85% less.
3. according to the molecular sieve of claim 1, it is characterised in that total pore volume is 0.35～0.50mL/g, compares table
Area is 400～500m2/g。
4. according to the molecular sieve of claim 1, it is characterised in that except the micropore of ZSM-5 itself, 2～50nm
In the range of have secondary mesopore.
5. the preparation method of the ZSM-5 molecular sieve that the intracrystalline of claim 1 is phosphorous, comprises the following steps:
(1) will be selected from tetrabutyl phosphonium bromide phosphine, tetrabutylphosphonium chloride, tetrabutylammonium hydroxide phosphorus, hexamethyl phosphinylidyne
The organophosphor template of one or more of triamine mixes with aluminum source, described organophosphor template
With the Al in aluminum source2O3Mol ratio be 0.1～40:1, by mixture in closed reactor
Processing 0.1～10h in 50～300 DEG C and obtain intermediate product, described aluminum source is selected from not containing
The aluminum source of alkali metal ion；
(2) by the intermediate product of step (1) with selected from tetraethyl ammonium hydroxide, tetraethylammonium bromide, four
Ethyl ammonium chloride, tetraethyl ammonium fluoride, TPAOH, Tetramethylammonium hydroxide, four
Having of one or more in methyl bromide ammonium TPAOH and TBAH
Machine template, silicon source, deionized water mix homogeneously, in mixture in mol, SiO2/Al2O3=
25～1000, organic formwork agent/SiO2=0.01～10, H2O/SiO2=2～20；
(3) mixture that step (2) obtains moves to carry out at 50～200 DEG C in closed reactor hydro-thermal
Product is also reclaimed in crystallization 10～200 hours.
6. according to the preparation method of claim 5, wherein, described organophosphor template is tetrabutylammonium hydroxide phosphorus.
7. according to the preparation method of claim 5, wherein, described aluminum source selected from boehmite, aluminium oxide and
One or more in aluminium hydroxide.
8. according to the preparation method of claim 5, wherein, organophosphor template in the mixture described in step (1)
Agent and the Al in aluminum source2O3Mol ratio be 1～30:1.
9. according to the preparation method of claim 5, wherein, the silicon source described in step (2) is selected from silica gel and/or white
White carbon black.
10. according to the preparation method of claim 5, wherein, described silicon source is silica gel.
11. according to the preparation method of claim 5, wherein, the mixture described in step (2) in mol,
SiO2/Al2O3It is 40～600, organic formwork agent/SiO2It is 0.01～8, H2O/SiO2It is 4～15.
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| CN107792864A (en) * | 2017-10-30 | 2018-03-13 | 中海油天津化工研究设计院有限公司 | A kind of preparation method of the molecular sieves of size tunable P ZSM 5 |
| CN107892308A (en) * | 2017-12-12 | 2018-04-10 | 太原理工大学 | Molecular sieves of ZSM 5 and preparation method thereof |
| CN113526519A (en) * | 2020-04-13 | 2021-10-22 | 中国石油化工股份有限公司 | Phosphorus-containing hierarchical pore ZSM-5 molecular sieve and preparation method thereof |
| CN114789063A (en) * | 2022-06-22 | 2022-07-26 | 浙江晟格生物科技有限公司 | Silicon-aluminum solid acid catalyst, preparation method and application |
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| JP2010260777A (en) * | 2009-05-11 | 2010-11-18 | Nippon Chem Ind Co Ltd | Method for producing phosphorus-containing beta type zeolite |
| CN103964465A (en) * | 2013-01-24 | 2014-08-06 | 中国石油化工股份有限公司 | Synthetic method for phosphorus-containing ZSM-5 molecular sieve |
| CN104098111A (en) * | 2013-04-03 | 2014-10-15 | 中国石油天然气股份有限公司 | Phosphorus-containing MFI molecular sieve synthesis method |
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| JP2010260777A (en) * | 2009-05-11 | 2010-11-18 | Nippon Chem Ind Co Ltd | Method for producing phosphorus-containing beta type zeolite |
| CN103964465A (en) * | 2013-01-24 | 2014-08-06 | 中国石油化工股份有限公司 | Synthetic method for phosphorus-containing ZSM-5 molecular sieve |
| CN104098111A (en) * | 2013-04-03 | 2014-10-15 | 中国石油天然气股份有限公司 | Phosphorus-containing MFI molecular sieve synthesis method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107792864A (en) * | 2017-10-30 | 2018-03-13 | 中海油天津化工研究设计院有限公司 | A kind of preparation method of the molecular sieves of size tunable P ZSM 5 |
| CN107892308A (en) * | 2017-12-12 | 2018-04-10 | 太原理工大学 | Molecular sieves of ZSM 5 and preparation method thereof |
| CN107892308B (en) * | 2017-12-12 | 2021-07-27 | 太原理工大学 | ZSM-5 molecular sieve and preparation method thereof |
| CN113526519A (en) * | 2020-04-13 | 2021-10-22 | 中国石油化工股份有限公司 | Phosphorus-containing hierarchical pore ZSM-5 molecular sieve and preparation method thereof |
| CN113526519B (en) * | 2020-04-13 | 2023-01-13 | 中国石油化工股份有限公司 | Phosphorus-containing hierarchical pore ZSM-5 molecular sieve and preparation method thereof |
| CN114789063A (en) * | 2022-06-22 | 2022-07-26 | 浙江晟格生物科技有限公司 | Silicon-aluminum solid acid catalyst, preparation method and application |
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