CN109289885A - A kind of gas phase catalytic synthesis perfluor iodine hydrocarbon compound catalyst and its preparation and application - Google Patents
A kind of gas phase catalytic synthesis perfluor iodine hydrocarbon compound catalyst and its preparation and application Download PDFInfo
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- CN109289885A CN109289885A CN201810976624.5A CN201810976624A CN109289885A CN 109289885 A CN109289885 A CN 109289885A CN 201810976624 A CN201810976624 A CN 201810976624A CN 109289885 A CN109289885 A CN 109289885A
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- Prior art keywords
- catalyst
- gas phase
- carrier
- hydrocarbon compound
- lanthanide series
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- 239000003054 catalyst Substances 0.000 title claims abstract description 54
- -1 iodine hydrocarbon compound Chemical class 0.000 title claims abstract description 50
- 229910052740 iodine Inorganic materials 0.000 title claims abstract description 36
- 239000011630 iodine Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 238000007036 catalytic synthesis reaction Methods 0.000 title description 5
- 229910052747 lanthanoid Inorganic materials 0.000 claims abstract description 30
- 150000002602 lanthanoids Chemical class 0.000 claims abstract description 30
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 150000001340 alkali metals Chemical class 0.000 claims abstract description 16
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000007146 photocatalysis Methods 0.000 claims abstract description 8
- 230000001699 photocatalysis Effects 0.000 claims abstract description 8
- WUPHOULIZUERAE-UHFFFAOYSA-N 3-(oxolan-2-yl)propanoic acid Chemical compound OC(=O)CCC1CCCO1 WUPHOULIZUERAE-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052980 cadmium sulfide Inorganic materials 0.000 claims abstract description 5
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 4
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims abstract description 4
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910001887 tin oxide Inorganic materials 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 26
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 20
- 239000000243 solution Substances 0.000 claims description 17
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 12
- 238000005470 impregnation Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 8
- 238000004090 dissolution Methods 0.000 claims description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 229910052684 Cerium Inorganic materials 0.000 claims description 4
- 229910052772 Samarium Inorganic materials 0.000 claims description 4
- 238000001802 infusion Methods 0.000 claims description 4
- 229910052746 lanthanum Inorganic materials 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 229910052692 Dysprosium Inorganic materials 0.000 claims description 2
- 229910052691 Erbium Inorganic materials 0.000 claims description 2
- 229910052693 Europium Inorganic materials 0.000 claims description 2
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 2
- 229910052689 Holmium Inorganic materials 0.000 claims description 2
- 229910052779 Neodymium Inorganic materials 0.000 claims description 2
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 2
- 229910052771 Terbium Inorganic materials 0.000 claims description 2
- 229910052775 Thulium Inorganic materials 0.000 claims description 2
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 2
- 229910052792 caesium Inorganic materials 0.000 claims description 2
- 229910052701 rubidium Inorganic materials 0.000 claims description 2
- 239000004215 Carbon black (E152) Substances 0.000 claims 1
- 229910052765 Lutetium Inorganic materials 0.000 claims 1
- 229930195733 hydrocarbon Natural products 0.000 claims 1
- 238000002386 leaching Methods 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- 238000009826 distribution Methods 0.000 abstract description 5
- OKJPEAGHQZHRQV-UHFFFAOYSA-N Triiodomethane Natural products IC(I)I OKJPEAGHQZHRQV-UHFFFAOYSA-N 0.000 abstract description 2
- INQOMBQAUSQDDS-UHFFFAOYSA-N iodomethane Chemical compound IC INQOMBQAUSQDDS-UHFFFAOYSA-N 0.000 abstract description 2
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 12
- 239000012071 phase Substances 0.000 description 8
- VPAYJEUHKVESSD-UHFFFAOYSA-N trifluoroiodomethane Chemical compound FC(F)(F)I VPAYJEUHKVESSD-UHFFFAOYSA-N 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000003786 synthesis reaction Methods 0.000 description 5
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 4
- 238000006555 catalytic reaction Methods 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 3
- 238000007323 disproportionation reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011941 photocatalyst Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 230000002194 synthesizing effect Effects 0.000 description 3
- 238000005979 thermal decomposition reaction Methods 0.000 description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000004587 chromatography analysis Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000543 intermediate Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- JGZVUTYDEVUNMK-UHFFFAOYSA-N 5-carboxy-2',7'-dichlorofluorescein Chemical compound C12=CC(Cl)=C(O)C=C2OC2=CC(O)=C(Cl)C=C2C21OC(=O)C1=CC(C(=O)O)=CC=C21 JGZVUTYDEVUNMK-UHFFFAOYSA-N 0.000 description 1
- 229910015900 BF3 Inorganic materials 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- JBLINBYLQKLDKH-UHFFFAOYSA-N CI.[F] Chemical compound CI.[F] JBLINBYLQKLDKH-UHFFFAOYSA-N 0.000 description 1
- 229920004449 Halon® Polymers 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- DTQVDTLACAAQTR-UHFFFAOYSA-M Trifluoroacetate Chemical compound [O-]C(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-M 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- ABDBNWQRPYOPDF-UHFFFAOYSA-N carbonofluoridic acid Chemical class OC(F)=O ABDBNWQRPYOPDF-UHFFFAOYSA-N 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- SOEBNUZZZSSRNB-UHFFFAOYSA-N difluoro(diiodo)methane Chemical compound FC(F)(I)I SOEBNUZZZSSRNB-UHFFFAOYSA-N 0.000 description 1
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 150000003891 oxalate salts Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 238000006692 trifluoromethylation reaction Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/093—Preparation of halogenated hydrocarbons by replacement by halogens
- C07C17/10—Preparation of halogenated hydrocarbons by replacement by halogens of hydrogen atoms
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a kind of gas phase photo-thermal to catalyze and synthesize perfluor iodomethane catalyst and its preparation and application.The catalyst is made of carrier and active component, and the carrier is the combination of one or more of tin oxide, titanium dioxide, zirconium dioxide or cadmium sulfide, and active component includes the C coated on carrier surface3N4With the metallic element for being carried on carrier surface, the metallic element is made of a kind of lanthanide series and at least one alkali metal element, the quality proportioning of one of lanthanide series and at least one alkali metal element is 1.0:(0.1-30), in the catalyst, based on carrier quality, C3N4Load capacity is 0.5-30%, and lanthanide series load capacity is 0.1-8.0%.The present invention provides the catalyst to catalyze and synthesize the application in perfluor iodine hydrocarbon compound in gas phase photo-thermal.Catalyst of the present invention has good photocatalysis performance, can reduce reaction temperature, improves selectivity, and carbon distribution is inhibited to generate to improve catalyst life.
Description
Technical field
The present invention relates to a kind of gas phase catalytic synthesis perfluor iodine hydrocarbon compound catalyst and its preparation method and application.
Background technique
CF3I is a kind of high added value halogenated alkane.In extinguishing chemical field, because have have a safety feature, fire-fighting efficiency is high,
The features such as economic benefits are high is one of the ideal substitute of Halons extinguishing chemical；In refrigerant art, CF3It is free of and disappears in I molecule
The chlorine atom and bromine atom of ozone are consumed, ODP 0, GWP are also very low, and nonflammable, oil-soluble and material compatibility are fine.And
C-I bond energy amount is low, is easy to decompose under heat or ultraviolet light irradiation, is one of the ideal substitute of traditional freon refrigerant；
In organic synthesis field, CF3I contains CF3, is important borontrifluoride reagent, is widely used in pesticide, medicine, surface-active
The fields such as agent and dyestuff.In addition, CF3I has a good application prospect in the fields such as semiconductor etching agent and foaming agent.
Earliest propose have industrial prospect synthetic method be perfluorocarboxylic acid salt thermal decomposition method [ALBERT L H,
WILLIAM G F.The degradation ofsilver trifluoroacetate to trifluoroiodomethane
[J] .Journal of American Chemical Society, 1950,72:3806-3807.], raw material is CF3COOM(M
=Ag, Na, K, Hg, Pb, Ba) and I2, wherein silver salt thermal decomposition effect is best, and thermal decomposition yield is up to 80% or more.Although should
Method yield is higher, but cost is too high, and open firing is needed in reaction process, the easy slug of solid reactant, and production is uneasy
Entirely.Later researcher replaces silver salt with the relatively cheap sylvite of price or sodium salt, but result is undesirable, and yield is lower, about
40% or so.1967, Paskovich [DONALD P, PETER G, GEORGE S H.Simplified method for
the preparation of fluoroalkyl iodides[J].Journal ofOrganic Chemistry,1967,32
(5): 833-834.] proposing to use sylvite or sodium salt as reactant, CF under dimethylformamide (DMF) reflux3The yield of I
Also it can achieve 70%.Then some researchers grope solvent and reaction condition both at home and abroad, find the reaction route
Repeatability is bad, and the reaction time is up to 10 hours.Liberation army pharmaceutical chemistry research institute is permitted magnificent hall et al. [Xu Huatang, Zhai Haixiao tri-
Improvement [J] chemical reagent of fluorine iodomethane preparation method, 1989,11 (2): 123.] having made some improvements this, uses ring fourth instead
Sulfone is as solvent, at 170-180 DEG C, when reacted between when reaching 4h, CF3The yield of I reaches 80% or so.The boiling of sulfolane
Point can improve reaction rate by increasing reaction temperature, be conducive to decomposition and the CF of intermediate than DMF high3The generation of I, contracting
Short reaction time.Although this method has the advantages that safe operation, reaction time are short, yield is high and solvent recoverable, also
It is that cost is too high, does not industrialize meaning.
Nineteen ninety, D.Naumann and W.Tyrra [Naumann D, Tyrra W.Polar
trifluoromethylation reactions: the formation of bis-(trifluoromethyl)iodine
(III)compounds and trifluoromethyliodin cations and anions[J].Canadian
Journal of Chemistry-Revue Canadienne de Chimie, 1991,69 (2): 327-333.] et al. discovery
With CF3IX2(X:F, Cl, OCOCF3) and Cd (CF3)2D (D:CH3CN or diglyme) it is raw material, it is molten with acetonitrile and pyridine
Agent can synthesize to obtain I (CF3)3With I (CF3)2X, the two intermediates further decompose and obtain CF3I。
Su [Su De Bao, Duan Jian Xing, Chen Qing Yun.A simple, novel method for
the preparation of trifluoromethyliodide and diiododifluoromethane[J].Journal
Ofthe Chemical Society, Chemical Communications, 1992, (11): 807-808.] by identical mole
Than the elemental iodine, KF and ClCF for 1:1:12CO2CH3It is added in the solution of DMF and CuI, it is small that 3 is reacted at 100-120 DEG C
When or so, finally obtain CF3I, yield have reached 80% or so.
Albert et al. [Albert L H, William G F.The degradation of silver
trifluoroacetata to trifluoroiodomethane[J].Journal of America Chemical
Societies, 1950,72 (8): 3806-3807.] Hunsdiecker (Hensel Dick) reaction method is used, by CF3COOAg
Powder and excessive elemental iodine mix heat resolve, finally obtain CF3The crude product of I, yield is up to 80% or more.
The method of above-mentioned synthesizing trifluoroiodomethaneand is intermittent reaction, and is asked there are expensive starting materials and by-product are difficult etc.
Topic, so not being the ideal technique for being suitble to industrialization amplification.
Lu Chunshan recently discloses a kind of method [CN105396604A] for synthesizing perfluor iodomethane, and the support type of use is urged
Agent is made of carrier and the active component being supported on carrier, and the carrier is porous material, and active component includes P elements
And metallic element, the metallic element are made of a kind of lanthanide series and at least one alkali metal element.The catalyst
In the reaction for catalyzing and synthesizing perfluor iodine hydrocarbon compound applied to perfluoro alkane compound gas phase, catalytic activity with higher.But
It is that gas phase catalysis process still has the disadvantages of temperature is high, carbon distribution is serious, yield is in the presence of the theoretical upper limit.
The present invention is directed to Cabbeen formation mechenism and its disproportionation characteristic during gas phase catalysis, by modulation reaction environment,
Change Cabbeen dismutation, inhibits carbon distribution to generate, break the prior art yield upper limit.
Summary of the invention
Perfluor iodine hydrocarbonylation is catalyzed and synthesized for perfluoro alkane compound gas phase the primary purpose of the present invention is that providing one kind
The loaded catalyst for closing object can reduce reaction temperature with good photocatalysis performance, improve selectivity, inhibit product
Carbon is generated to improve catalyst life.
A second object of the present invention is to provide a kind of preparation methods of catalyst.
Third object of the present invention is to provide the catalyst to synthesize the hydrocarbonylation of perfluor iodine in perfluoro alkane compound for catalysis
The application in object is closed, to reduce reaction temperature, selectivity is improved, carbon distribution is inhibited to generate to improve catalyst life.
For achieving the above object, The technical solution adopted by the invention is as follows:
On the one hand, the present invention provides a kind of gas phase catalytic synthesis perfluor iodine hydrocarbon compound catalyst, by carrier and work
Property group be grouped as, the carrier is the combination of one or more of tin oxide, titanium dioxide, zirconium dioxide or cadmium sulfide, living
Property component include coated on carrier surface C3N4With the metallic element for being carried on carrier surface, the metallic element is by one kind
Lanthanide series and at least one alkali metal element composition, the matter of one of lanthanide series and at least one alkali metal element
Proportion is measured as 1.0:(0.1-30), in the catalyst, is based on carrier quality, C3N4Load capacity (i.e. C3N4With the quality of carrier
Percentage) it is 0.5-30%, lanthanide series load capacity (i.e. the mass percent of lanthanide series and carrier) is 0.1-8.0%.
Further, the lanthanide series is one in La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu
Kind, preferably La, Ce, Sm.
Further, the alkali metal element is K, Rb or Cs.
Further, the metallic element is made of a kind of lanthanide series and a kind of alkali metal element, a kind of group of the lanthanides
The quality proportioning of element and a kind of alkali metal element is preferably 1.0:(1.0-20.0).
Further, the metallic element is made of a kind of lanthanide series and two kinds of alkali metal elements, a kind of group of the lanthanides
The quality proportioning of element and two kinds of alkali metal elements is preferably 1.0:(1.0-20.0) (two kinds of alkali metal quality sums).
Further, in the catalyst, lanthanide series load capacity is preferably 0.1-6.5%, more preferable 0.5-6.5%, more
Further preferred 0.5-1%.
Further, in the catalyst, C3N4Load capacity is preferably 1.0-20%.
On the other hand, the present invention provides a kind of preparation methods of catalyst, the preparation method is that:
(1) by C3N4It is dissolved in sulfuric acid solution, acquired solution is coated on carrier surface, is then dried；
(2) soluble compound containing metallic element is loaded to the carrier handled by step (1) using infusion process
On, take carrier to be stood, dried after the completion of dipping, then in 200- in not oxygenous and water inertia or hydrogen atmosphere
750 DEG C roasting 0.5-10 hours, the catalyst is made.
In the present invention, C3N4It can be prepared by method reported in the literature, for example be by by forerunners such as dicyandiamide or urea
Directly pyrolysis prepares [Dong, F. to body in air；Wu,L.；Sun,Y.；Fu,M.；Wu,Z.；Lee,S.C.,Efficient
synthesis of polymeric g-C3N4layered materials as novel efficient visible
light driven photocatalysts.Journal ofMaterials Chemistry 2011,21(39),
15171.]。
Further, in step (1), sulfuric acid solution concentration is preferably 0.5-0.7M, preferably 0.5M.The present invention is for C3N4With
The feed ratio of sulfuric acid does not specially require, general every gram of C3N435-75mL (preferably 50mL) sulfuric acid solution is added.C3N4In sulfuric acid
Dissolution in solution can be by means of the means such as heating, stirring.Drying condition after the completion of coating be vacuum state (- 0.08~-
It is 0.5-10 hours dry in 60-120 DEG C under 0.0MPa), be preferable over 80-110 DEG C it is 2-8 hours dry.
Further, the soluble compound containing metallic element refers to the nitrate, halide salt, carbonic acid of metallic element
Salt or oxalates.
Further, the infusion process can use co-impregnation or step impregnation, when using co-impregnation, i.e., contain a variety of
There is the soluble compound dissolution of metallic element that mixed solution is made, then by a variety of soluble compounds containing metallic element
It loads on carrier together.When using step impregnation, i.e., a variety of soluble compounds containing metallic element are respectively prepared molten
Liquid, then on step load to carrier.Infusion process of the present invention, it is preferred to use incipient impregnation.Dipping temperature is 15-80
DEG C, preferably 20-80 DEG C, more preferable 20-70 DEG C.
Further, time of repose is 0.5-12 hours, preferably 2-8 hours after the completion of dipping.
Further, in the preparation method of the catalyst, drying condition be vacuum state (- 0.08~-0.0MPa) under, in
60-120 DEG C is 0.5-10 hours dry, be preferable over 80-110 DEG C it is 2-8 hours dry.
Further, in the preparation method of the catalyst, roasting process must be in not oxygenous and inertia or hydrogen of water
Carried out in atmosphere, preferably roasting condition are as follows: 250-650 DEG C roasting 0.5-8 hours.
Further, the preparation method of the catalyst specifically carries out in accordance with the following steps:
(1) by C3N4It is dissolved in sulfuric acid solution, acquired solution is coated on carrier surface, is then dried；
(2) by a kind of lanthanide metal salt and one or two kinds of alkali metal salts according to lanthanide series: alkali metal element quality is matched
Than mixed aqueous solution is made for the 1.0:(1.0-20.0) dissolution that feeds intake, incipient impregnation is carried out with carrier in 20-70 DEG C, wherein
The mass ratio of lanthanide series and carrier is 0.5-1.0:100, then stands 2-8 hours at such a temperature, true then at 80-110 DEG C
Sky dry 2-8 hour, finally under not oxygenous and water inertia or hydrogen atmosphere through 250-650 DEG C roasting 0.5-8 hours, make
Obtain the catalyst.
The third aspect, the present invention provides application of the catalyst in gas phase catalytic synthesis perfluor iodine hydrocarbon compound,
The application process is as follows:
Control is loaded with the temperature of the photo catalysis reactor of catalyst between 50-450 DEG C, is 200- in wave-length coverage
Under the irradiation of the light source of 460nm, perfluoro alkane compound, iodine vapor are passed through in reactor simultaneously, in 1.0-1.5 atmospheric pressure
Lower come into full contact with catalyst is reacted, and gained tail gas absorbs through lye, is dry, after separation, is obtained corresponding perfluor iodine hydrocarbonylation and is closed
Object；It is C that the perfluoro alkane compound, which is selected from chemical formula,xF2x+1One of compound of H or any several mixing, it is described
The chemical formula of perfluor iodine hydrocarbon compound is CxF2x+1I, wherein x is 1-6.
Further, the wave-length coverage of the light source is preferably 250-350nm.
Further, in catalyst application, the preferred CF of perfluoro alkane compound3H or CF3CF2H's or both
Mixture.Air speed is not higher than 800h-1。
Further, in catalyst application, the amount proportion of the substance of perfluoro alkane compound and iodine vapor is 1.0:
(0.5-2.0)。
Further, the reactor can be the gas-solid phase reactors such as fixed bed, fluidized bed.
Further, perfluoro alkane compound and iodine vapor irradiate before contacting with catalyst through Photoreactor, and the time is not
Lower than 5s.
Compared with the prior art, the invention has the following advantages that
1) C that the present invention uses3N4And a variety of oxidations such as carrier tin oxide, titanium dioxide, zirconium dioxide or cadmium sulfide
Object or their mixture, are all good carrier of photocatalyst, can improve photocatalysis efficiency.More importantly C3N4
It can interact with carrier, the further photocatalysis performance of modulation.
2) photocatalysis is introduced to the reaction of perfluoro alkane compound synthesis perfluor iodine hydrocarbon compound, it is advantageous to promote excitation
Perfluoro alkane compound generates free radical, effectively inhibits Cabbeen dismutation, breaks the conversion ratio prior art upper limit, improves selection
Property, carbon distribution is reduced, reaction temperature is reduced.
3) catalyst preparation of the invention is convenient, and preparation process condition is easily controllable, reproducible.And photocatalysis is used,
It is environmentally protective, while it being added without oxygen, increase stability and the service life of catalyst.
4) reaction selectivity of the perfluoro alkane compound synthesis perfluor iodine hydrocarbon compound under catalyst of the present invention is most
High by reachable 77.2%, yield reaches as high as 70.83%.
Specific embodiment
With specific embodiment, technical scheme is described further below, but protection scope of the present invention is unlimited
In this.
Embodiment 1 --- embodiment 11
Dicyandiamide or urea are weighed according to document [Dong, F.；Wu,L.；Sun,Y.；Fu,M.；Wu,Z.；Lee,S.C.,
Efficient synthesis of polymeric g-C3N4layered materials as novel efficient
visible light driven photocatalysts.Journal ofMaterials Chemistry 2011,21
(39), 15171.] method reported synthesizes C3N4, by C3N4It is added in 0.5M sulfuric acid solution, wherein feeding intake with sulfuric acid solution
Then under vacuum condition than for 1g:50mL, stirring and dissolving at 80 DEG C of heating water bath, acquired solution is coated on carrier surface, (-
0.08~-0.0MPa) in 85 DEG C of dry 12h.Then a kind of lanthanide metal salt and one kind/two kinds of soluble alkali metal salts are weighed,
Aqueous impregnation solution is made in dissolution.To after completely dissolution, carry out incipient impregnation with treated carrier, then at such a temperature
Certain time is stood, then vacuum (- 0.08~-0.0MPa) is dry, is most roasted under inert atmosphere or hydrogen atmosphere afterwards, is made
The catalyst.Each element mass ratio is measured using ICP in catalyst.It is specific as shown in table 1.
Comparative example 1
By two kinds of alkali metal salts and a kind of quality proportioning of rare-earth additive (15-20): 1, which weighs the dissolution that feeds intake, is made mixing
Aqueous solution carries out incipient impregnation in the mixture of 20-70 DEG C and titanium dioxide, cadmium sulfide, wherein the load capacity of rare earth element
(i.e. the mass percent of rare earth element and carrier) is 0.1-2.0wt%, then stands 12-24 hours at such a temperature, then at
80-110 DEG C vacuum drying 2-8 hours, it is finally small through 250-600 DEG C of roasting 0.5-8 under the inert atmosphere of not oxygenous and water
When, the loaded catalyst is made.Each element mass ratio is measured using ICP in catalyst.It is specific as shown in table 1:
Embodiment 12 --- embodiment 18
In the gas solid reactors such as fixed bed reactors or fluidized bed, by perfluoro alkane compound or several perfluoro alkanes
The mixture of compound, iodine vapor are that 1.0:1.0 is passed through reactor simultaneously according to the amount proportion of substance, perfluoro alkane compound and
Iodine vapor irradiates before entering catalyst bed through Photoreactor, and the time is not less than 5s.The a length of 250-350nm of light wave is set, it is empty
Speed is not higher than 200-800h-1, come into full contact with and react with catalyst under 50-450 DEG C, 1.0-1.5 atmospheric pressure.Tail gas is through alkali
Liquid absorbs, is dry, after separation, obtains perfluor iodine hydrocarbon compound.Product is by Agilent 7890A gas chromatographic analysis.Specific such as table 2
It is shown.
Comparative example 2
In the gas solid reactors such as fixed bed reactors or fluidized bed, by perfluoro alkane compound or several perfluoro alkanes
Mixture, the iodine vapor of compound are 1:0.75 while being passed through reactor, air speed 200-800h according to the amount proportion of substance-1,
It comes into full contact with and reacts with catalyst under 50-450 DEG C, 1.0-1.5 atmospheric pressure.Tail gas absorbs through lye, is dry, after separation,
Obtain perfluor iodine hydrocarbon compound.Product is by Agilent 7890A gas chromatographic analysis.It is specific as shown in table 2:
Claims (10)
1. a kind of gas phase photo-thermal catalyzes and synthesizes perfluor iodine hydrocarbon compound catalyst, it is made of carrier and active component, the load
Body is the combination of one or more of tin oxide, titanium dioxide, zirconium dioxide or cadmium sulfide, and active component includes to be coated on to carry
The C in body surface face3N4With the metallic element for being carried on carrier surface, the metallic element is by a kind of lanthanide series and at least one
The quality proportioning of kind alkali metal element composition, one of lanthanide series and at least one alkali metal element is 1.0:(0.1-
30), in the catalyst, carrier quality, C are based on3N4Load capacity is 0.5-30%, and lanthanide series load capacity is 0.1-8.0%.
2. gas phase photo-thermal as described in claim 1 catalyzes and synthesizes perfluor iodine hydrocarbon compound catalyst, it is characterised in that: described
Metallic element is made of a kind of lanthanide series and a kind of alkali metal element, a kind of lanthanide series and a kind of alkali metal element
Quality proportioning is 1.0:(1.0-20.0).
3. gas phase photo-thermal as described in claim 1 catalyzes and synthesizes perfluor iodine hydrocarbon compound catalyst, it is characterised in that: described
Metallic element is made of a kind of lanthanide series and two kinds of alkali metal elements, a kind of lanthanide series and two kinds of alkali metal elements
Quality proportioning is 1.0:(1.0-20.0).
4. the gas phase photo-thermal as described in one of claim 1-3 catalyzes and synthesizes perfluor iodine hydrocarbon compound catalyst, it is characterised in that:
The lanthanide series is one of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, preferably La, Ce or
Sm；The alkali metal element is K, Rb or Cs.
5. the gas phase photo-thermal as described in one of claim 1-3 catalyzes and synthesizes perfluor iodine hydrocarbon compound catalyst, it is characterised in that:
In the catalyst, lanthanide series load capacity is 0.1-6.5%, preferably 0.5-6.5%, more preferable 0.5-1%；C3N4Load capacity
For 1.0-20%.
6. a kind of gas phase photo-thermal as described in claim 1 catalyzes and synthesizes the preparation method of perfluor iodine hydrocarbon compound catalyst, institute
State the preparation method comprises the following steps:
(1) by C3N4It is dissolved in sulfuric acid solution, acquired solution is coated on carrier surface, is then dried；；
(2) soluble compound containing metallic element is loaded on the carrier by step (1) processing using infusion process, leaching
It takes carrier to be stood, dried after the completion of stain, is then roasted in not oxygenous and water inertia or hydrogen atmosphere in 200-750 DEG C
It burns 0.5-10 hours, the gas phase photo-thermal is made and catalyzes and synthesizes perfluor iodine hydrocarbon compound catalyst.
7. preparation method as claimed in claim 6, it is characterised in that: the preparation method specifically carries out in accordance with the following steps:
(1) by C3N4It is dissolved in sulfuric acid solution, acquired solution is coated on carrier surface, is then dried；
(2) by a kind of lanthanide metal salt and one or two kinds of alkali metal salts according to lanthanide series: alkali metal element quality proportioning is
Mixed aqueous solution is made in the dissolution that 1.0:(1.0-20.0) feeds intake, and carries out incipient impregnation with carrier in 20-70 DEG C, wherein group of the lanthanides member
The mass ratio of element and carrier is 0.5-6.5:100, then stands 2-8 hours at such a temperature, is dried in vacuo then at 80-110 DEG C
2-8 hours, finally under the inertia of not oxygenous and water or hydrogen atmosphere through 250-650 DEG C roasting 0.5-8 hour, it is obtained described in
Gas phase photo-thermal catalyzes and synthesizes perfluor iodine hydrocarbon compound catalyst.
8. gas phase photo-thermal as described in claim 1 catalyzes and synthesizes perfluor iodine hydrocarbon compound catalyst and catalyzes and synthesizes in gas phase photo-thermal
Application in perfluor iodine hydrocarbon compound, the application process are as follows:
Control is loaded with the temperature of the photo catalysis reactor of catalyst between 50-450 DEG C, is 200-460nm's in wave-length coverage
Under the irradiation of light source, by perfluoro alkane compound, iodine vapor simultaneously be passed through in reactor, under 1.0-1.5 atmospheric pressure with urge
Agent comes into full contact with reaction, and gained tail gas absorbs through lye, is dry, after separation, obtains corresponding perfluor iodine hydrocarbon compound；It is described
It is C that perfluoro alkane compound, which is selected from chemical formula,xF2x+1One of compound of H or any several mixing, the perfluor iodine hydrocarbon
The chemical formula of compound is CxF2x+1I, wherein x is 1-6.
9. application as claimed in claim 8, it is characterised in that: the wave-length coverage of the light source is 250-350nm.
10. application as claimed in claim 8, it is characterised in that: perfluoro alkane compound and iodine vapor are contacted with catalyst
Before, i.e., it is irradiated through Photoreactor, the time is not less than 5s.
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| JPS5268110A (en) * | 1975-12-05 | 1977-06-06 | Onoda Cement Co Ltd | Preparation of trifluoromethyl iodide |
| FR2604997B1 (en) * | 1986-10-10 | 1988-12-02 | Rhone Poulenc Chimie | PROCESS FOR THE PREPARATION OF TRIFLUOROMETHYL IODIDE |
| US6977316B1 (en) * | 2004-12-08 | 2005-12-20 | Honeywell International Inc. | Direct one-step synthesis of trifluoromethyl iodide |
| CN101219925B (en) * | 2008-01-21 | 2011-01-26 | 北京宇极科技发展有限公司 | Method for synthesizing trifluoroiodomethane and pentafluoroethyliodide meanwhile |
| CN105396604B (en) * | 2015-09-14 | 2017-10-20 | 巨化集团技术中心 | A kind of loaded catalyst and its application in the synthesis of perfluor iodine hydrocarbon compound |
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