CN100448536C - Hydroisomerization catalyst and its preparation method - Google Patents
Hydroisomerization catalyst and its preparation method Download PDFInfo
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- CN100448536C CN100448536C CNB2005100797397A CN200510079739A CN100448536C CN 100448536 C CN100448536 C CN 100448536C CN B2005100797397 A CNB2005100797397 A CN B2005100797397A CN 200510079739 A CN200510079739 A CN 200510079739A CN 100448536 C CN100448536 C CN 100448536C
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- 239000003054 catalyst Substances 0.000 title claims abstract description 67
- 238000002360 preparation method Methods 0.000 title abstract description 16
- 239000002808 molecular sieve Substances 0.000 claims abstract description 68
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000002253 acid Substances 0.000 claims abstract description 28
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 37
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 18
- 229910000510 noble metal Inorganic materials 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 15
- 230000004048 modification Effects 0.000 claims description 13
- 238000012986 modification Methods 0.000 claims description 13
- 229910052697 platinum Inorganic materials 0.000 claims description 10
- 229910052763 palladium Inorganic materials 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 238000007605 air drying Methods 0.000 claims description 5
- 238000007598 dipping method Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 2
- 230000008021 deposition Effects 0.000 claims description 2
- 238000000151 deposition Methods 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000006317 isomerization reaction Methods 0.000 abstract description 27
- 239000011148 porous material Substances 0.000 abstract description 11
- 150000001335 aliphatic alkanes Chemical class 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 42
- SNRUBQQJIBEYMU-UHFFFAOYSA-N dodecane Chemical compound CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 33
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- 239000001257 hydrogen Substances 0.000 description 16
- 229910052739 hydrogen Inorganic materials 0.000 description 16
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 13
- 239000003921 oil Substances 0.000 description 12
- 239000000047 product Substances 0.000 description 12
- 230000009467 reduction Effects 0.000 description 10
- 239000002283 diesel fuel Substances 0.000 description 9
- 241000269350 Anura Species 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 7
- 238000005336 cracking Methods 0.000 description 7
- 229910001220 stainless steel Inorganic materials 0.000 description 7
- 239000010935 stainless steel Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 150000001336 alkenes Chemical class 0.000 description 4
- 239000002199 base oil Substances 0.000 description 4
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- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 4
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- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000004517 catalytic hydrocracking Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000006356 dehydrogenation reaction Methods 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 150000007522 mineralic acids Chemical class 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
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- 238000007493 shaping process Methods 0.000 description 2
- 210000004243 sweat Anatomy 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 1
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 239000004254 Ammonium phosphate Substances 0.000 description 1
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 1
- 241000990027 Bisaltes Species 0.000 description 1
- 230000010718 Oxidation Activity Effects 0.000 description 1
- 229910004283 SiO 4 Inorganic materials 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- SMZOGRDCAXLAAR-UHFFFAOYSA-N aluminium isopropoxide Chemical class [Al+3].CC(C)[O-].CC(C)[O-].CC(C)[O-] SMZOGRDCAXLAAR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000001588 bifunctional effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
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- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- WEHWNAOGRSTTBQ-UHFFFAOYSA-N dipropylamine Chemical compound CCCNCCC WEHWNAOGRSTTBQ-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
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- 238000010335 hydrothermal treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 150000004965 peroxy acids Chemical class 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
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- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000000634 powder X-ray diffraction Methods 0.000 description 1
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- 235000019260 propionic acid Nutrition 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 238000006462 rearrangement reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
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- 239000010703 silicon Substances 0.000 description 1
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Abstract
The present invention relates to an isomerization catalyst, a preparation method and an application thereof. A catalyst carrier is treated with an acid solution to dredge pore channels of a molecular sieve and change the pore diameter and the pore volume of the carrier molecular sieve; after being dried, the carrier is loaded with active metal components, and thus, the catalyst of the present invention is prepared. Compared with a catalyst prepared in the prior art, the catalyst remarkably enhances isomerization selectivity and the yield of isomerization products when used for normal alkane isomerization reaction.
Description
Technical field
The present invention relates to a kind of catalyst for hydroisomerizing.
The invention still further relates to above-mentioned Preparation of catalysts method,
The invention still further relates to the application of above-mentioned catalyst when normal alkane isomerization reacts.
Background technology
According to alkane hydroconversion reactions mechanism, n-alkane can be converted into the isoparaffin identical with the raw molecule carbon number by hydroisomerizing; Also can be converted into than the few isomery of raw molecule carbon number and the mixture of n-alkane by hydrocracking.Catalyst derives from the balance of the hydrogenation/dehydrogenation performance of acid and metal to the high selectivity of long chain alkane isomerization, more derives from the shape selectivity of unique pore structure of molecular sieve carrier.Suitably adjust the acid-metal of catalyst-the select relative activity of shape three functions, improve the hydrogenation activity of catalyst on the one hand, the concentration of the alkene of dehydrating alkanes gained is increased, the alkene that the while isomery obtains hydrogenation rapidly be saturated to alkane, and the alkene of a cracking gained and carbonium ion also can be generated saturation of olefins by hydrogenation rapidly, and the secondary cracking reaction is reduced.Its result plays a leading role the raw molecule hydroisomerization, and the hydroisomerization degree reduces in the crackate, and product will be based on the isoparaffin identical with the raw molecule carbon number.On the other hand, select suitable molecular sieve carrier, utilize its unique pore passage structure and size, shape restriction is selected in rearrangement reaction to alkyl carbonium ion intermediate isomerization side chain, makes that volume is big, the two faster side chains of cracking are difficult to formation with three branched product; Improve the diffusion velocity of reactant and product simultaneously, avoid the secondary cracking reaction of product in molecular sieve inside.
Isomerization dewaxing catalyst is a kind of bifunctional catalyst, provides the acidic site of isomerization/cracking by acid carrier, and the metal position provides the hydrogenation/dehydrogenation function.What it had mainly utilized molecular sieve pore passage selects the shape effect, is presented as respectively to the selectivity of reactant with to product selectivity.In addition, after molecule enters the molecular sieve endoporus, also can be subjected to the restriction of mass transfer.Particularly when reactant or product molecular diameter and molecular sieve orifice diameter near the time owing to be subjected to the effect of inner hole wall field and the obstruction of various energy barriers, molecule will be subjected to various restrictions in the diffusion of intracrystalline.The minor variations of molecular sieve bore diameter or diffusion molecular diameter all can cause the marked change of diffusion coefficient.
Silicoaluminophosphamolecular molecular sieves is a class novel molecular sieve of the exploitation eighties, and its skeleton is by PO
4 +, AlO
4 -And SiO
4Tetrahedron form, have tradable cation.On the silicoaluminophosphamolecular molecular sieves skeleton, carry out the isomorphous and replace, can make this class material have acidity because of the imbalance of electric charge on the skeleton with silicon.Because it has the pore passage structure and the mesopore of one dimension, and normal alkane isomerization is had very high selectivity.About utilizing isomerization catalyst in a lot of document patents the existing report of silicoaluminophosphamolecular molecular sieves as carrier.
US5,135,638,5,833,837,6,702,937 have all reported the method for utilizing catalyst for hydroisomerizing to produce lubricating oil, wherein using more is SAPO series molecular sieve, and (0.39 * 0.64nm) is converted into isoparaffin with the high carbon number n-alkane in the raw material to utilize the pore passage structure of its proper acidic center intensity and 10 yuan of rings.Because SAPO series molecular sieve has shown excellent performance in the alkane isomerization reaction, in a lot of patents all used as catalyst for hydroisomerizing and set about improving the reactivity worth of SAPO series molecular sieve by certain processing method.
US20040138051 has introduced a kind of method of the SAPO of raising series molecular sieve reactivity worth.Specifically with molecular sieve carried on the porous mass of silicates, utilize porous mass molecular sieve to be wrapped up and makes its duct interconnect, the interaction between this duct can improve the isomerization reaction performance of integer catalyzer.
CN1448480A has introduced a kind of isomerization dewaxing catalyst.The author is in the SAPO catalyst series preparation process, particularly thereby the acid centre that exists when the load of active component is capped the shortcoming that causes activity of such catalysts and selectivity to descend, and has proposed a kind of method of molecular sieve being carried out the modification processing before carried noble metal with organic ammonium or organic base.Just the acid centre on the molecular sieve can be protected by the method, use the conventional method carried metal again, at last acid centre is discharged, thereby obtain acid strong, activity and selectivity is higher, the isomerization dewaxing catalyst that has good stability.
Molecular sieve is handled purpose existing report the in many patents that reaches the raising reactivity worth with acid solution.CN1059701A, CN1105646A, CN1179994 have introduced the method that adopts acid solution that beta-molecular sieve is handled, and remove part aluminium in the skeleton, thereby have improved the reactivity worth of hydrocracking.
CN1245090 has introduced a kind of method of modifying of HTS (TS-1) of the MFI of having structure, TS-1 molecular sieve, acid compound and the water that will synthesize mix, reacted 10 minutes～3 hours down at 15～60 ℃, to mix through TS-1 molecular sieve, organic base and the water that peracid treatment is crossed then, the gained mixture is put into closed reactor, under 100～200 ℃ and self-generated pressure reaction after 2 hours～8 days products therefrom is filtered, washing and dry.Removed extra-framework titanium in the part molecular sieve pore passage by above processing method, reduced the invalid decomposition of oxidant, thereby improved its catalytic oxidation activity.
CN1415704A has introduced a kind of Nobel metal hydrogen cracking catalyst.Catalyst is carrier with the modified Y molecular sieve, it is placed on through hydrothermal treatment consists contains H
+Carrying out acid treating solution pH in the aqueous solution of ion is 1～6, and the acid treatment temperature is 30～100 ℃, after 0.2～5 hour processing time, filters, and repeats acid treatment then and filters 1～4 time.Handle molecular sieve silica alumina ratio later and improve, acidity descends, thereby has improved heat endurance, middle distillates oil selectivity and the anti-sulphur of catalyst, the ability of nitrogen.
Summary of the invention
The object of the present invention is to provide a kind of catalyst for hydroisomerizing.
Another object of the present invention is to provide the method for the above-mentioned catalyst of preparation.
For achieving the above object, catalyst for hydroisomerizing provided by the invention is made up of with group VIII noble metals the silicoaluminophosphamolecular molecular sieves (SAPO-11) of acid solution modification, wherein the weight content of noble metal is 0.05-5.0%, preferred noble metal weight content is 0.1-2.0%, and best noble metal weight content is 0.1-1.0%.
Wherein group VIII noble metals is made of among Pt, Pd, the Ir one or both.
Preparation method of the present invention, be after with acid solution the SAPO-11 molecular sieve being carried out suitable processing, can adjust the acidity of SAPO-11 molecular sieve, and then the control isomerization reaction takes place in appropriate scope, in addition, " cleaning " and modification by acid solution, can effectively dredge the inner duct of stopping up of molecular sieve, change the pore passage structure of molecular sieve inside, adjust the aperture of molecular sieve, increase the pore volume of molecular sieve, improve the diffusion-restricted of duct to reactant or product molecule, thereby effectively suppress the generation of cracking reaction, promote the carrying out of isomerization reaction, obtain the isomerized products of high yield.Therefore purpose of the present invention is applied to this method of modifying of acid treatment by regulating and control acid-treated process, obtain a kind of catalyst with high isomerization selectivity and isomerization product yield on the SAPO series molecular sieve exactly.
Specifically, above-mentioned Preparation of catalysts method provided by the invention comprises:
(1) the SAPO SAPO-11 molecular sieve of getting a certain amount of removed template method mixes with certain density acid solution; Stirred 1 minute-1 hour down at 10-80 ℃, preferred treatment temperature is 20-30 ℃;
(2) solid content is filtered or centrifugation, and be washed till pH=6-7 with deionized water, 100-150 ℃ of air drying obtains the molecular sieve carrier after the modification;
(3) load group VIII noble metal active component on carrier, drying and roasting gets catalyst.
The SAPO-11 molecular sieve method of roasting of said removed template method is as follows in the method step provided by the present invention (1): under the oxygen-containing atmosphere, heating rate with 0.5-10 ℃/minute, rise to 500-600 ℃ from room temperature, then at 500-600 ℃ of roasting 30-50 hour.Preferred processing method is: under air atmosphere, with 1-5 ℃/minute heating rate, rise to 550-580 ℃ from room temperature, then 550-580 ℃ of roasting 40 hours-45 hours.
The concentration of used acid solution is 0.001-5mol/L, preferably 0.01-1mol/L in the method step provided by the present invention (1).Its pH is less than 7, and best pH scope is between 0-2.
The used acid solution and the mass ratio of molecular sieve are 50～500: 1 in the method step provided by the present invention (1), and preferred mass ratio is 200～250: 1.
Used acid solution can be the inorganic acid solution that comprises sulfuric acid, hydrochloric acid, phosphoric acid, nitric acid, hydrofluoric acid in the method step provided by the present invention (1), comprises the organic acid soln of formic acid, acetate, propionic acid or comprises the solution of the bisalt of ammonium chloride, ammonium fluoride, ammonium phosphate, ammonium nitrate, ammonium sulfate.Preferred acid is inorganic acid solution.
The employed active metal component of method step provided by the present invention (3) comprises that group VIII noble metals is made of among Pt, Pd, the Ir one or both.Wherein the weight content of noble metal is 0.05-5.0%, and preferred weight content is 0.1-1.0%.
The method of the said carried metal of method step provided by the present invention (3), can adopt metal acid, metal acid-salt, chloride, ammino-complex, carbonyl complex or their precursor compounds such as mixture of Pt, Pd, Ir is raw material, employing comprises dipping, precipitation, deposition, adds existing chemistry and physical methods such as adhesive is bonding, mechanical pressing, realizes group VIII noble metals and the combination with silicoaluminophosphamolecular molecular sieves of AEL molecular sieve structure.
Catalyst provided by the present invention will be handled through 300-600 ℃ of roasting and reduction before being used for reaction, reduction is handled available existing catalyst reduction method and is realized, promptly by adopting gas such as hydrogen, formaldehyde, hydrazine or liquid reducer to contact reducing catalyst with catalyst.
Catalyst provided by the present invention can be widely used in the process of petroleum distillate, as processes such as catalytic dewaxing, isomerization-visbreaking, isomerization dewaxings.
The present invention adopts fixed bed reactors to estimate described catalyst, and loaded catalyst is 10ml, before the charging catalyst is reduced processing, and the reaction liquid raw material is by the compression pump charging, and enters reactor and catalyst haptoreaction after hydrogen mixes.Reducing condition is: Hydrogen Vapor Pressure 0.1-10MPa, temperature 200-500 ℃, time 1-24 hour.Reaction condition is: Hydrogen Vapor Pressure 0.1-16MPa, temperature 280-400 ℃, reacting material liquid volume space velocity 0.3-3h
-1, hydrogen to oil volume ratio (hydrogen/reacting material liquid) 300-2000.
Description of drawings
Fig. 1 is X-ray diffraction (XRD) the crystalline phase figure after the untreated samples roasting
The specific embodiment
Following embodiment will the present invention is described further, but the present invention is not limited among the following embodiment.Wherein Comparative Examples is without acid-treated sample, and the X-ray diffraction after its roasting (XRD) crystalline phase figure sees Fig. 1.
Comparative Examples
This Comparative Examples is with reference to the synthetic SAPO-11 molecular sieve of the method for relevant document.Get 80 gram aluminium isopropoxides and mix, add 150 gram phosphoric acid then with 300 gram deionized waters, be stirred to evenly after, add the positive di-n-propylamine of 82 grams successively, 73 gram Ludox and 120 gram deionized waters and abundant stirring obtain gel.
Above-mentioned gel is packed in the autoclave of inner liner polytetrafluoroethylene, in 190 ℃ of thermostatic crystallizations 24 hours, the solid product after the filtration was through washing, 120 ℃ of drying roastings after 12 hours, and it is carried out X-ray powder diffraction measure, obtain SAPO SAPO-11 molecular sieve.
Get the SAPO-11 molecular sieve of the above-mentioned preparation of 180 grams, mix with 100 gram SB powder, 15 gram sesbania powder.Measure 110 gram red fuming nitric acid (RFNA)s (10wt%) and 110 ml waters and mix the back and add above-mentioned mixed-powder, fully mix and pinch the back extrude the trifolium-shaped bar on banded extruder, then 110 ℃ of dryings 8 hours down, 550 ℃ of roastings are 4 hours in the air atmosphere.Obtain the molded molecular sieve carrier.
SAPO-11 molecular sieve carrier 10g with above-mentioned moulding is crushed to the 20-40 order, with platinum acid chloride solution 7.58mL H
2PtCl
6Solution (every mL contains Pt 0.0066g) carries out saturated dipping, then 120 ℃ dry 8 hours down, 480 ℃ of roastings are 8 hours in air atmosphere, must contain the catalyst of 0.5wt%Pt.
The catalyst 10mL that gets above-mentioned preparation packs in the stainless steel tube reactor, carry out prereduction with pure hydrogen, reducing condition: hydrogen flow rate 200mL/min, rise to 250 ℃ of constant temperature 2 hours with 5 ℃/min, rise to 450 ℃ of constant temperature after 2 hours with 5 ℃/min again, reduce to reaction temperature in hydrogen stream, logical feedstock oil n-dodecane reacts, and product is by gas chromatographic analysis.Reaction condition: reaction temperature is 330 ℃, and reaction pressure is 8MPa, and n-dodecane liquid air speed is 1.0h
-1, hydrogen-oil ratio (vol/vol) is 1000, what it was used for positive structure dodecane hydroisomerization reaction the results are shown in Table 1.
Embodiment 1
Get the prepared SAPO-11 molecular sieve of Comparative Examples and concentration and be the 0.2mol/L hydrochloric acid solution according to molecular sieve (gram): the ratio of hydrochloric acid solution (gram)=1: 250 is mixed, its pH=0.7, and 30 ℃ of following stir process 20 minutes, speed of agitator was 150 rev/mins; Then solid content is filtered, be washed till pH=6.5 with deionized water, 120 ℃ of air dryings obtain the SAPO-11 molecular sieve after the modification.
Get the condition of molding that the SAPO-11 molecular sieve after the modification adopts by Comparative Examples, preparation trifolium-shaped strip SAPO-11 molecular sieve carrier.SAPO-11 molecular sieve 10g with moulding is crushed to the 20-40 order, with platinum acid chloride solution 7.58mL H
2PtCl
6Solution (every mL contains Pt 0.0066g) carries out saturated dipping, then 120 ℃ dry 8 hours down, 480 ℃ of roastings are 8 hours in air atmosphere, must contain the catalyst of the present invention of 0.5wt%Pt.
The catalyst 10mL that gets above-mentioned preparation packs in the stainless steel tube reactor, and by reduction and the reaction condition that Comparative Examples adopts, what it was used for positive structure dodecane hydroisomerization reaction the results are shown in Table 1.
Embodiment 2
The SAPO-11 molecular sieve of getting the Comparative Examples gained and concentration are the 0.1mol/L hydrochloric acid solution according to molecular sieve (gram): the ratio of hydrochloric acid solution (gram)=1: 250 is mixed, its pH=1.0, and 40 ℃ of following stir process 20 minutes, speed of agitator was 150 rev/mins; Then solid content is filtered, be washed till pH=6.5 with deionized water, 120 ℃ of air dryings obtain the SAPO-11 molecular sieve after the modification.
Get the SAPO-11 molecular sieve of 180 grams after the modifications, mix with 90 gram SB powder, 20 gram sesbania powder.Measure 100 gram red fuming nitric acid (RFNA)s (10wt%) and 110 ml waters and mix the back and add above-mentioned mixed-powder, fully mix and pinch the back extrude the trifolium-shaped bar on banded extruder, then 110 ℃ of dryings 8 hours down, 550 ℃ of roastings are 4 hours in the air atmosphere.Obtain the molded molecular sieve carrier.
SAPO-11 molecular sieve carrier with above-mentioned moulding is crushed to the 20-40 order, uses 4.15mL PdCl
2Solution (every mL contains Pd 0.012g) carries out saturated dipping.Then 120 ℃ dry 8 hours down, 480 ℃ of roastings are 8 hours in air atmosphere, must contain the catalyst of the present invention of 0.5wt%Pd.
The catalyst 10mL that gets above-mentioned preparation packs in the stainless steel tube reactor, and by reduction and the reaction condition that Comparative Examples adopts, what it was used for positive structure dodecane hydroisomerization reaction the results are shown in Table 1.
Embodiment 3
The SAPO-11 molecular sieve of getting the Comparative Examples gained and concentration are the 0.05mol/L hydrochloric acid solution according to molecular sieve (gram): the ratio of hydrochloric acid solution (gram)=1: 400 is mixed, its pH=1.3, and 40 ℃ of following stir process 5 minutes, speed of agitator was 150 rev/mins; Then solid content is filtered, be washed till pH=6.5 with deionized water, 120 ℃ of air dryings obtain the SAPO-11 molecular sieve after the modification.
Get the SAPO-11 molecular sieve of 200 grams after the modifications, mix with 100 gram SB powder, 20 gram sesbania powder.Measure 110 gram red fuming nitric acid (RFNA)s (10wt%) and 100 ml waters and mix the back and add above-mentioned mixed-powder, fully mix and pinch the back extrude the trifolium-shaped bar on banded extruder, then 110 ℃ of dryings 8 hours down, 550 ℃ of roastings are 4 hours in the air atmosphere.
The SAPO-11 molecular sieve of above-mentioned moulding is crushed to the 20-40 order, uses 2.26mL H
2PtCl
6Solution (every mL contains Pt 0.0133g) and 0.83mL PdCl
2The mixed liquor impregnated carrier of solution (every mL contains Pd 0.012g) dries by the fire them 4 hours at 120 ℃ then, and 480 ℃ of roastings were prepared into and contain the two noble metal catalysts of the present invention that 0.3wt%Pt adds 0.1wt%Pd in 8 hours.
The catalyst 10mL that gets above-mentioned preparation packs in the stainless steel tube reactor, and by reduction and the reaction condition that Comparative Examples adopts, what it was used for positive structure dodecane hydroisomerization reaction the results are shown in Table 1.
Table 1.Pt/SAPO-11 catalyst is applied to positive structure dodecane (n-C
12H
26) result of hydroisomerization reaction
Reaction condition: reaction pressure=8MPa, positive structure dodecane feed liquid air speed=1h
-1, hydrogen-oil ratio (hydrogen flowing quantity/positive structure dodecane inlet amount)=1000.
The amount of positive structure dodecane conversion ratio (%)=unconverted positive structure dodecane of 1-/positive structure dodecane inlet amount * 100%
Total amount * 100% of the positive structure dodecane of amount/all conversions of isomerization selectivity (%)=be converted into isomerization (side chain) dodecane
Isomerization yield (%)=isomerization selectivity (%) * positive structure dodecane conversion ratio (%) * 100%
Comparing with the catalyst of Comparative Examples through this method modification catalyst later as can be seen from Table 1, is that the isoparaffin selectivity or the yield of product liquid all are significantly improved.
Embodiment 4
Get the prepared catalyst 10mL of embodiment 1, carry out prereduction in the pure hydrogen of device external application, reducing condition: hydrogen flow rate 200mL/min, rise to 250 ℃ of constant temperature 2 hours with 5 ℃/min, rise to 450 ℃ of constant temperature after 2 hours with 5 ℃/min again, in hydrogen stream, reduce to room temperature, behind the logical clean hydrogen of nitrogen replacement, draw off catalyst.Pack in the stainless steel tube reactor, feed hydrogen and heat up, rise to reaction temperature after 2 hours, the 10# straight-run diesel oil that feeds after making with extra care carries out the reaction of hydro-isomerization pour point depression, production-35# low-coagulation diesel oil.Reaction condition: pressure is 8MPa, and reaction temperature is 345 ℃, and the liquid air speed is 1.0h
-1, hydrogen-oil ratio (vol/vol) is 800.Reaction result shows liquid receipts 98.3%, and-35# low-coagulation diesel oil yield reaches 95.2%, and Cetane number changes little behind the hysomer.Result such as table 2:
The hydro-isomerization pour point depression reaction result of table 2. straight-run diesel oil
The refining back 10# straight-run diesel oil that contacts with isomerization catalyst of the present invention can adopt present commercial diesel oil hydrofining catalyst to handle straight-run diesel oil and obtain.
Catalyst for hydroisomerizing provided by the invention can be handled the high freezing point diesel fuel raw material, high produced in yields low-coagulation diesel oil.
Embodiment 5
Get the prepared catalyst of embodiment 1, press reduction and the reaction method of embodiment 4, be applied to the hydroisomerization dewax reaction of high content of wax 650SN furfural refining oil, produce the low lube base oil that coagulates of superhigh viscosity index.Reaction condition and result such as table 3:
The hydroisomerization dewax condition and the result of table 3.650SN furfural refining oil
Catalyst for hydroisomerizing provided by the invention can be handled high condensation point waxy oil raw material, the low lube base oil that coagulates of high produced in yields superhigh viscosity index.
Embodiment 6
Get the prepared catalyst of embodiment 1, press reduction and the reaction method of embodiment 4, be applied to the hydroisomerization dewaxing reaction of high condensation point 200+400SN sweat oil, produce the low light lubricating oil base oil that coagulates of high viscosity index (HVI).Reaction condition and result such as table 4:
The hydroisomerization dewaxing reaction condition and the result of table 4.200+400SN sweat oil
Catalyst for hydroisomerizing provided by the invention can be handled high condensation point waxy oil raw material, the low lube base oil that coagulates of high produced in yields high viscosity index (HVI).
Embodiment 6
Get embodiment 1 prepared shaping carrier 10 grams, be crushed to the 20-40 order, with 1.33mL[Pt (NH
3)
4] Cl
2Solution (every mL contains Pt 0.0188g) and 2.10mL H
2IrCl
6Solution (every mL contains Ir0.0119g) mixed liquor impregnated carrier dries by the fire them 4 hours at 120 ℃ then, and 480 ℃ of roastings were prepared into and contain the two noble metal catalysts of the present invention that 0.25wt%Pt adds 0.25wt%Ir in 8 hours.
The catalyst 10mL that gets above-mentioned preparation packs in the stainless steel tube reactor, and by reduction and the reaction condition that Comparative Examples adopts, what it was used for positive structure dodecane hydroisomerization reaction the results are shown in Table 5.
Embodiment 7
Get embodiment 1 prepared shaping carrier 10 grams, be crushed to the 20-40 order, use 2.5mL PdCl
2Hydrochloric acid solution (every mL contains Pd 0.010g) and 2.10mL H
2IrCl
6Solution (every mL contains Ir 0.0119g) mixed liquor impregnated carrier dries by the fire them 4 hours at 120 ℃ then, and 480 ℃ of roastings were prepared into and contain the two noble metal catalysts of the present invention that 0.25wt%Pd adds 0.25wt%Ir in 8 hours.
The catalyst 10mL that gets above-mentioned preparation packs in the stainless steel tube reactor, and by reduction and the reaction condition that Comparative Examples adopts, what it was used for positive structure dodecane hydroisomerization reaction the results are shown in Table 5.
The reaction under high pressure result of table 5. n-dodecane on catalyst for hydroisomerizing
Claims (4)
1, a kind of method for preparing catalyst for hydroisomerizing, this catalyst is made up of the silicoaluminophosphamolecular molecular sieves and the group VIII noble metals of acid solution modification, and wherein the weight content of noble metal is 0.05-5.0%; Step is as follows:
A) mass ratio of acid solution and molecular sieve is 50-500: 1, stirred 1 minute-1 hour at 10-80 ℃;
B) mixed liquor of step 1 filters, and solid content washes with water to pH=6-7, and 100-150 ℃ of air drying obtains the molecular sieve carrier after the modification;
C) load group VIII noble metal active component on carrier, drying and roasting gets catalyst;
The described molecular sieve of step a is to have passed through the silicoaluminophosphamolecular molecular sieves behind the temperature roasting removed template method more than 300 ℃;
The described acid solution of step a is a hydrochloric acid.
2, method as claimed in claim 1 is characterized in that, acid solution that step a uses, its pH are 0-2.
3, method as claimed in claim 1 is characterized in that, the mass ratio of acid solution and molecular sieve is 200-250 among the step a: 1.
4, method as claimed in claim 1, it is characterized in that, adopting one or both metal acid, metal acid-salt, chloride, ammino-complex, carbonyl complex or their mixture among Pt, Pd, the Ir among the step c is raw material, employing comprises dipping, precipitation, deposition, the interpolation adhesive is bonding or the method for mechanical pressing, realizes the combination of group VIII noble metals and carrier.
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| CN102500413B (en) * | 2011-10-25 | 2013-04-17 | 洛阳市科创石化科技开发有限公司 | N-butane hydroisomerization catalyst, and preparation method and application thereof |
| CN103373888A (en) * | 2012-04-24 | 2013-10-30 | 中国石油天然气股份有限公司 | Application of sulfonic mesoporous organosilicon catalyst |
| CN103878020B (en) * | 2014-04-17 | 2015-12-30 | 中国华电集团科学技术研究总院有限公司 | A kind of preparations and applicatio method of high selectivity base metal long chain alkane isomerization catalyst |
| CN105126898B (en) * | 2015-08-11 | 2017-11-24 | 华东师范大学 | The preparation of hydrogenation deoxidation isomerization catalyst and its application in gutter oil prepares diesel oil |
| CN108114735B (en) * | 2016-11-26 | 2020-03-31 | 中国科学院大连化学物理研究所 | Preparation method of linear olefin skeletal isomerization catalyst |
| CN109465029B (en) * | 2017-09-07 | 2021-09-14 | 中国科学院大连化学物理研究所 | Preparation method of isomerization catalyst taking AFI type structure molecular sieve as carrier |
| CN109465030B (en) * | 2017-09-07 | 2022-01-25 | 中国科学院大连化学物理研究所 | Preparation method of isomerization catalyst taking ATO type structure molecular sieve as carrier |
| CN109465021B (en) * | 2017-09-07 | 2021-10-08 | 中国科学院大连化学物理研究所 | Preparation method of isomerization catalyst with MFI-structure molecular sieve as carrier |
| CN108745411A (en) * | 2018-05-23 | 2018-11-06 | 中国中化股份有限公司 | A kind of long-chain normal paraffin catalyst for hydroisomerizing and preparation method thereof |
| CN111068771B (en) * | 2019-12-29 | 2023-06-13 | 上海兖矿能源科技研发有限公司 | Isomerization pour point depressing catalyst suitable for Fischer-Tropsch synthesis distillate oil and preparation method and application thereof |
| CN112742449A (en) * | 2021-01-12 | 2021-05-04 | 中国科学院城市环境研究所 | Molecular sieve catalyst, and preparation method and application thereof |
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