CN106955746A - A kind of complex carrier of the aluminum oxide containing zinc oxide and preparation method thereof - Google Patents

A kind of complex carrier of the aluminum oxide containing zinc oxide and preparation method thereof Download PDF

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CN106955746A
CN106955746A CN201710158372.0A CN201710158372A CN106955746A CN 106955746 A CN106955746 A CN 106955746A CN 201710158372 A CN201710158372 A CN 201710158372A CN 106955746 A CN106955746 A CN 106955746A
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zinc oxide
complex carrier
zinc
alumina
potassium
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晁会霞
罗祥生
赖家凤
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Qinzhou University
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Qinzhou University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/14Phosphorus; Compounds thereof
    • B01J27/16Phosphorus; Compounds thereof containing oxygen, i.e. acids, anhydrides and their derivates with N, S, B or halogens without carriers or on carriers based on C, Si, Al or Zr; also salts of Si, Al and Zr
    • B01J27/18Phosphorus; Compounds thereof containing oxygen, i.e. acids, anhydrides and their derivates with N, S, B or halogens without carriers or on carriers based on C, Si, Al or Zr; also salts of Si, Al and Zr with metals other than Al or Zr
    • B01J27/1802Salts or mixtures of anhydrides with compounds of other metals than V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re, e.g. phosphates, thiophosphates
    • B01J27/1808Salts or mixtures of anhydrides with compounds of other metals than V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re, e.g. phosphates, thiophosphates with zinc, cadmium or mercury
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/60Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J35/61Surface area
    • B01J35/615100-500 m2/g
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G45/00Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds
    • C10G45/02Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing
    • C10G45/04Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing characterised by the catalyst used
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/10Feedstock materials
    • C10G2300/1037Hydrocarbon fractions
    • C10G2300/104Light gasoline having a boiling range of about 20 - 100 °C
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/20Characteristics of the feedstock or the products
    • C10G2300/201Impurities
    • C10G2300/202Heteroatoms content, i.e. S, N, O, P
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2400/00Products obtained by processes covered by groups C10G9/00 - C10G69/14
    • C10G2400/02Gasoline

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Catalysts (AREA)

Abstract

The invention discloses complex carrier of a kind of aluminum oxide containing zinc oxide and preparation method thereof, the complex carrier includes the zinc oxide containing gahnite, aluminum oxide, adjuvant component phosphorus, potassium and magnesium, the complex carrier zinc-aluminium is uniformly dispersed, specific surface area high, the carrier available for FCC catalyst sulfur prodegradant, FCC hydrodesulfurizations or hydrogenation catalyst.

Description

A kind of complex carrier containing zinc oxide-alumina and preparation method thereof
Technical field
The invention belongs to Hydrobon catalyst technical field, more particularly to a kind of compound load containing zinc oxide-alumina Body and preparation method thereof, the complex carrier can be used for FCC catalyst sulfur prodegradant and FCC hydrodesulfurization carriers.
Background technology
With Law on Environmental Protection require it is increasingly strict, the sulfur content in gasoline product receives stricter limitation. More than 80% is catalytically cracked gasoline in current China gasoline product, because the general sulfur content of catalytically cracked gasoline is in 100- 500v%, or even also high-sulfur, high olefin feedstock oil, sulfur content is in more than 500mg/kg, and olefin(e) centent is also above 40%.Selection Property hydrodesulfurization technology inevitably cause hydrocarbon fraction saturation when carrying out deep hydrodesulfurizationof and reduce octane number, this Requiring to try one's best while Hydrobon catalyst desulfurization avoids loss of octane number excessive.
In existing Hydrobon catalyst, ZnO/A12O3It is its main active component, ZnO is in hydro-thermal spinel-type Composite oxides are the up-and-coming Inorganic Non-metallic Materials of a class, and the composite of zinc oxide and aluminum oxide is urged frequently as desulfurization Changing material is used to adsorb desulfurization and hydrodesulfurization field.It is mixed that the conventional preparation method of the domestic and international material includes infusion process, machinery Legal, coprecipitation and peptisation.Wherein, because infusion process and mechanical mixing use alumina material as predecessor, lead to The specific surface area of adjustment alumina material is crossed, both approaches can prepare the composite of high specific surface area, but be due to Aluminum oxide and zinc oxide interaction in composite is weaker, and the loss of zinc oxide is easily produced during use, is typically Promote the two to form spinelle to avoid the loss of zinc oxide using the method for high-temperature roasting;And coprecipitation and peptisation are used Compound containing aluminum and zinc prepares zinc-aluminium precursor by precipitation or peptization, aluminum and zinc in preparation process by react produce compared with Strong interaction can avoid the zinc oxide during use from being lost in, but the specific surface area that peptisation prepares material is minimum, It is set to be restricted when being used as catalysis material.
CN200710045746.4 disclose it is a kind of reduce the assistant for calalytic cracking of content of sulfur in gasoline, the auxiliary agent include zinc The composite oxides of aluminate and dispersed zinc oxide and optionally at least one rare earth metal oxide, by The mixture of zinc-aluminium bedded substance and optional rare earth hydrous oxide with hydrotalcite-like compound is fired and obtained, chemistry Formula is ZnAl2O4·(1-9)ZnO·(0-0.5)RE2O3;Its preparation method is by NaOH and the dropwise addition of soluble inorganic sodium salt Into the mixed solution of zinc salt, aluminium salt and rare earth ion, the pH value of solution is 8-11, and 1-4h is calcined at 500-1000 DEG C.This is helped Blend and be applied in catalytic cracking process with conventional FCC catalyst and/or active enhanced aid after agent shaping, with reduction gasoline Sulfur content function simultaneously has excellent hydrothermal stability.To obtain gahnite structure, the material is needed in higher temperature roasting Burn, specific surface area is 120m to the maximum after roasting2/g。
CN201210178395.5 (CN103449503A) discloses a kind of preparation method of nano zinc aluminum spinelle, and it is made Preparation Method is that zinc salt is added to the water into dissolving, adds silicon source, is stirred 10-30 minutes, adds expanding agent, stirring, at 20-100 DEG C Aging 30-60 minutes, is dried, 500-1200 DEG C of roasting;Feed molar proportioning is Zn:Al:Water=1:2:16-35;With zinc oxide Quality calculated for 100%, the addition of expanding agent is 0.5-30%;Expanding agent is sucrose, glycerine, ammonium carbonate, bicarbonate One or more in ammonium, polystyrene emulsion, polyethylene glycol.The specific surface area of synthesized gahnite from 60 to 300m2/g.The zinc-aluminium proportioning that this method feeds intake is relatively low and preparation process adds expanding agent, only obtains gahnite, does not wrap Containing dispersed zinc oxide.CN201310625314.6 (CN103691441) discloses a kind of strong absorption, high visible degraded The preparation method of performance catalysis material, it is presoma with ternary houghite that the invention, which is related to one kind, is obtained by high-temperature roasting High-specific-surface mesoporous structure gahnite and zinc oxide, nickel oxide nano composite photocatalyst material for obtaining and preparation method thereof, The material is used for absorption and degraded to organic pollution.The invention utilizes zinc nitrate, nickel nitrate, aluminum nitrate, sodium carbonate and hydrogen It is raw material that oxidation, which is received and waited, and salting liquid and aqueous slkali are configured to respectively, simultaneously under magnetic agitation, is mixed at 80 DEG C with constant flow pump; Reaction mixture is transferred in hydrothermal reaction kettle, in hydro-thermal process 5-10h at 130-180 DEG C;Suction filtration, wash, be drying to obtain before Body is driven, forerunner is put into Muffle furnace and is calcined 2-6 hours at 400-600 DEG C, product is produced, zinc, nickel, aluminium ion mol ratio are 1-3:1-3:1-3, specific surface area is more than 150m2/g.Need to carry out during this method synthesis of ternary houghite presoma Hydro-thermal process, and treatment time is longer.
CN200310121344.X discloses a kind of preparation method of the Nano-class zinc oxide conductive powder body of adulterated al.The party Method is by the soluble-salt of zinc and doped chemical aluminium, gallium, indium, yttrium, scandium, tin, germanium, the mixing salt solution of the soluble-salt of silicon and heavy Shallow lake agent is added drop-wise in water simultaneously, is produced altogether under conditions of 40-75 DEG C of the temperature and pH value 7.0-7.5 of whole reaction system is controlled The zinc oxide precursor basic zinc carbonate of precipitation generation doping, by the roasting under the mixed atmosphere of hydrogen and argon gas, is made The super fine zinc oxide conductive powder material of doping is obtained, but material prepared by this method is to be applied to conductive material, doping The addition mole of element is only the 0.1-10% of zinc and doped chemical integral molar quantity.
CN200510028233.3 discloses a kind of preparation method of high-performance sulfur transfer agent for catalytic cracking flue gas, this method with Zinc, magnesium and aluminium are active component, using cerium and vanadium as auxiliary agent, under the conditions of 60-80 DEG C, pH value 8-10, by zinc salt, magnesium salts, aluminium salt In the mixed solution that NaOH and sodium carbonate are added drop-wise to the mixed solution of cerium salt, obtained coprecipitated product is in 400-600 DEG C roasting 6-8h, prepares zinc mangnesium-aluminium-cerium houghite, zinc, magnesium, the mol ratio of three kinds of metals of aluminium are 1.0 by coprecipitation: 1.0-4.5:1.0-2.0, the sulfur transfer additive prepared using the material has efficient SOx absorption and desorption performance and good machine Tool intensity.
CN200910087590.5 discloses a kind of desulfurizing agent for reforming stock oil and preparation method thereof, method for preparing catalyst It is related to blending method, eutectic method and coprecipitation, it is characterised in that its weight, which is constituted, is:ZnO:10%-40%, NiO:15%- 22%th, Al2O3:10%-17%, SiO2:5%-22%, surplus is the impurity that can not exempt from.
CN201310089762.9 (CN 103159238) disclose a kind of nano-scale stratiform complex hydroxide and its Fractional precipitation preparation method, be the soluble-salt and alkali for using metal for raw material, by fractional precipitation reaction make composition LDH laminates Metal ion precipitate respectively, and produce LDH in second step precipitation process, specific surface area is 140-280m2/g.Relative to altogether The precipitation method, although the invention employs is precipitated twice, but the LDH material specific surface areas prepared are higher, but the invention is reacted Time is longer, and the reaction time provided in embodiment is more than 10 hours.The purpose of the invention is that the stratiform for preparing Gao Bibiao is answered Hydroxide (LDH) is closed, the layered double hydroxide structural formula is complicated, may relate to various metals or its combination, prepare Process needs two steps to precipitate respectively, and the reaction time is longer.《Research-zinc-aluminium the point for reducing sulfur content of catalytic cracking gasoline auxiliary agent is brilliant The synthesis of stone and its cracking desulfurization performance》(author:Wang Peng;Sinopec Group,《(oil adds petroleum journal Work)》2 phases of volume 19 in 2003):A kind of preparation method of gahnite is disclosed:Sodium aluminate solution and zinc nitrate solution are pressed into m (Al2O3)/m (ZnO)=9 ratio, is added drop-wise in 40 DEG C of distilled water with identical speed respectively, is added after being well mixed 16% sodium hydroxide solution, the pH value of regulation solution is 8.6, and the sediment of generation adds a small amount of hydrogen after aging 15min Sodium hydroxide solution, regulation pH value is 9.0.Sediment is filtered through the repetition of more than 3 times, washing, to remove Na+.Finally will precipitation Thing dries 4h at 120 DEG C, and 2h is calcined at 700 DEG C.The specific surface area of sample is substantially all in 160m2/ g or so.
The content of the invention
It is an object of the invention to provide a kind of complex carrier containing zinc oxide-alumina.By by the solubility containing aluminium Salting liquid and zinc-containing solution are alternately titrated by non-constant pH, prepare the zinc oxide stratified material containing gahnite, the oxygen Change zinc stratified material again with the kneading such as the soluble-salt of boehmite, adjuvant component phosphorus, potassium and magnesium, obtain containing zinc oxide-oxygen Change the complex carrier of aluminium.The complex carrier zinc-aluminium is uniformly dispersed, specific surface area is high, be mainly used in FCC catalyst sulfur prodegradant and FCC hydrodesulfurization carriers.
A kind of complex carrier containing zinc oxide-alumina of the present invention, including the zinc oxide containing gahnite, oxygen Change aluminium, adjuvant component phosphorus, potassium and magnesium, the composition of complex carrier is with oxidation material gauge:Zinc oxide content containing gahnite For 5.0-40.0wt%, alumina content is 60.0-95.0wt%, and the content of adjuvant component phosphorus, potassium and magnesium accounts for carrier quality Percentage composition is respectively P2O50.2-1.2wt%, K2O 0.2-2.5wt%, MgO 0.2-2.5wt%, complex carrier compare surface Product 200-300m2/g。
It is preferred that, the composition of described complex carrier is with oxidation material gauge:Zinc oxide content containing gahnite is 10.0-35.0wt%, alumina content is 65.0-90.0wt%, and the content of adjuvant component phosphorus, potassium and magnesium accounts for the hundred of carrier quality Point content is respectively P2O50.2-1.2wt%, K2O 0.2-2.5wt%, MgO 0.2-2.5wt%, complex carrier specific surface area 200-300m2/g。
A kind of preparation method of complex carrier containing zinc oxide-alumina of the present invention, comprises the following steps:
Soluble salt solutions and zinc-containing solution containing aluminium are alternately titrated by non-constant pH, prepared containing gahnite Zinc oxide stratified material;Zinc oxide and boehmite containing gahnite are well mixed, sesbania powder, nitric acid is added The acid solution containing Sodium Polyacrylate after acidification, and phosphoric acid, potassium nitrate and magnesium nitrate the aqueous solution, kneading, after shaping, Drying process, calcination process obtains containing zinc oxide-alumina composite carrier.
Zinc oxide of the present invention containing gahnite, in terms of oxide, the content of zinc oxide is 60-90wt%, It is preferred that 65-75wt%;Specific surface area is 160-220m2/ g, preferably 190-220m2/g.The content of zinc oxide is being controlled in 65- When 80%, specific surface area 170-200m2/g;When controlling the content of zinc oxide in 70-80wt%, specific surface area 190-220m2/ g。
The described zinc oxide stratified material prepared containing gahnite, is preferably prepared by the following preparation method:Will Soluble Zn salting liquid is divided into 2-4 parts, under the conditions of 40-80 DEG C, and sodium metaaluminate and sodium carbonate are added in a zinc solution Mixed solution containing aluminium, stops that mixed solution containing aluminium is added dropwise when pH value reaches 8.5-9.5;Be further continued for be added dropwise another zinc salt it is molten Liquid;After zinc solution is dripped, continue that mixed solution containing aluminium is added dropwise, stop being added dropwise containing aluminium mixing when pH value reaches 8.5-9.5 Solution;It will contain aluminium mixed solution according to the above method and replace titration with zinc solution, until the whole completion of dropping of zinc solution, finally Mixed solution containing aluminium is once added dropwise, when pH value reaches 8.5-9.5, the alternating titration process of non-constant pH value terminates, control drop Determine process to complete in 1-6h;After 80-95 DEG C of aging 2-8h, cooling washing is to neutrality, in 80-140 DEG C of dry 4-10h, 450-550 DEG C of roasting 4-10h, obtains the dispersed zinc oxide stratified material containing gahnite.
The described zinc oxide stratified material containing gahnite or the zinc oxide material containing gahnite, can be abbreviated For zinc oxide or zinc oxide containing gahnite.
Soluble zinc salt of the present invention is zinc nitrate or zinc chloride.
The acid solution containing Sodium Polyacrylate after described nitric acid acidification, is preferably prepared by the following preparation method: Deionized water is heated to 30-90 DEG C, then nitric acid is dissolved into deionized water, Sodium Polyacrylate is added, and dissolved Entirely, the acid solution containing Sodium Polyacrylate is obtained.The addition of described Sodium Polyacrylate is preferably the 0.6- of boehmite 12wt%.The Sodium Polyacrylate of acidified processing, its is uniformly dispersed more preferably, and zinc oxide, alumina powder mixing are more equal It is even.
The addition of the sesbania powder is preferably the 0.2-7wt% of boehmite.
Described drying, roasting obtains Hydrobon catalyst, is dried 4-6 hours, 550-650 DEG C at 110-140 DEG C Lower roasting 6-8 hours, obtains Hydrobon catalyst;At described drying process, calcination process, preferably 110-150 DEG C drying Reason calcination process 4.5-8 hours at 4-8 hours, 550 DEG C -700 DEG C.
The complex carrier containing zinc oxide-alumina obtained using preparation method of the present invention, can also using potassium and Magnesium is modified to the complex carrier surface containing zinc oxide-alumina, and the concentration of potassium and magnesium is unsuitable too high, preferably configuration concentration Carrier surface is sprayed less than the potassium nitrate and magnesium nitrate aqueous solution when preparing complex carrier, carrier is preferably carried out as follows Surface is modified:Complex carrier of the aqueous solution spray containing zinc oxide-alumina containing potassium nitrate and magnesium nitrate is configured, through drying, roasting The zinc oxide-alumina complex carrier for obtaining used additives potassium and magnesium progress surface modification is burnt, control zinc oxide-alumina is compound to be carried Potassium oxide and content of magnesia are respectively in the range of 0.2-2.5wt% and 0.2-2.5wt%, and aoxidize carrier surface in body The content of potassium and magnesia is 1.05-1.6 times of internal oxidation potassium and content of magnesia.
Compared with prior art, the present invention has advantages below:
1st, the zinc oxide containing gahnite of the invention is that alternately prepared by titration by non-constant pH, i.e., in non-constant pH Prepared by the alternating titration of sodium carbonate liquor and zinc-containing solution under the conditions of value, containing aluminium, accordingly, it would be desirable to which zinc-containing solution is divided into number Part, the sodium carbonate liquor containing aluminium is strong alkali solution, and the strong acid weak base salting liquid containing zinc is between acid solution, aluminium zinc solution Repeatedly alternately titration pH value is swung between soda acid, be conducive to aluminium zinc precursor thing can orderly accumulation be layer structure, through straight Connect that low-temperature bake can be uniformly dispersed and specific surface area can be in 150-220m2The point containing zinc-aluminium regulated and controled between/g is brilliant The zinc oxide material of stone, it is to avoid the precursor obtained using the step of alkaline solution one titration zinc-aluminium mixed solution needs high-temperature roasting The problem of fixed zinc oxide, decrease hydrothermal treatment process.The material has larger specific surface area, it is adaptable to be catalyzed material Material, is particularly suitable for use in FCC catalyst sulfur prodegradant and hydrodesulfurization carrier material.
2nd, the present invention can also introduce phosphorus, potassium, magnesium and Sodium Polyacrylate, poly- third in zinc oxide-alumina complex carrier Olefin(e) acid sodium can repair that to improve diffusion effect in catalytic inner pore passage structure, catalyst good.The carrier is prepared into hydrodesulfurization Catalyst, the catalyst such as cobalt molybdenum or nickel molybdenum can suppress alkene saturated activity, and catalyst desulfurizing rate is high, alkene saturation factor (HYD) it is low, with good hydrodesulfurization selectivity.
What the 3rd, the present invention was obtained contains zinc oxide-alumina composite carrier, using potassium and magnesium to being answered containing zinc oxide-alumina Close carrier surface to be modified, and make the content of carrier surface potassium oxide and magnesia be internal oxidation potassium and content of magnesia 1.05-1.6 times.Complex carrier surface is modified by the way of spray, is capable of the portion on effective peptization complex carrier surface Divide micropore, so advantageously reduce the micropore ratio on complex carrier surface, improve complex carrier surface Jie-macropore ratio, promote Complex carrier surface produces more active sites load centres, effectively improves catalyst desulfurizing activity.Carrier surface is changed Enter to use dipping method, impregnated carrier surface can make large quantity of moisture enter carrier, and intensity is deteriorated, and does not reach raising carrier surface The purpose of Jie-macropore ratio.
4th, carrier surface of the present invention is through potassium and magnesium-modified effect, and the complex carrier containing zinc oxide-alumina can be made To be used for the hydrodesulfurization of gasoline after the carrier loaded active component of Hydrobon catalyst.
Embodiment
By the following examples with comparative example to the present invention is containing zinc oxide-alumina composite carrier and preparation method thereof and answers With being described in further detail.But these embodiments are not regarded as limiting of the invention.
Analysis method and standard:Sulfur content in oil products is analyzed:SH/T 0689-2000
Primary raw material used by catalyst is prepared to originate:Reagent of the present invention is commercially available prod.
Feedstock oil is catalytically cracked gasoline, and sulfur content is 300mg/kg, and RON is 92.0, and alkene is 41.2%vol.
Embodiment 1
1.2kg zinc nitrates are dissolved in 6L water and are made into zinc-containing solution, by 0.24kg sodium metaaluminates and 0.30kg sodium carbonate It is dissolved in 4L water and is made into containing aluminum solutions.Zinc-containing solution is divided into 3 parts, every part of 2L.2L zinc-containing solutions are taken, temperature keeps 80 DEG C, mixed solution containing aluminium to pH value is added dropwise thereto and reaches 9.0;Stop that mixed solution containing aluminium is added dropwise, then 2L zinc-containing solutions are added dropwise Into hybrid system, continue dropwise addition mixed solution containing aluminium to pH value and reach 9.0;Mixed solution containing aluminium and zinc-containing solution alternately drip Fixed, until zinc-containing solution is all added, last time is added dropwise mixed solution containing aluminium and reaches 9.0 to pH, and titration time amounts to 3h. The mixture arrived is after 80 DEG C of aging 4h, and cooling washing dries 3h to neutrality in 135 DEG C of air atmospheres, in 500 DEG C of roastings 9h, obtains the dispersed zinc oxide stratified material containing gahnite, in terms of oxide, and the content of zinc oxide is 65%; Specific surface area is 196m2/g。
Phosphatase 11 .04g, potassium nitrate 1.03g are weighed respectively, and magnesium nitrate 8.88g, which is dissolved completely in be made into 60g distilled water, to be contained Phosphorus, potassium, the aqueous solution of magnesium.6.0g Sodium Polyacrylates are dissolved in 70g distilled water, add the nitre that 3.8g mass concentrations are 65% Acid.Zinc oxide of the 40g containing gahnite and 164.3g boehmites ground and mixed is uniform, 6.0g sesbania powders are added, Sodium Polyacrylate acid solution, phosphorous, potassium, the aqueous solution of magnesium, kneading after shaping, is roasted at 125 DEG C of drying process 7 hours, 580 DEG C Burn processing and obtain the complex carrier containing zinc oxide-alumina in 7 hours.Complex carrier specific surface area 276m2/g.Complex carrier includes Zinc oxide 25wt% containing gahnite, aluminum oxide is 71.9wt%, and adjuvant component phosphorus, potassium, content of magnesium are respectively P2O5 0.4wt%, K2O 1.2wt%, MgO 1.5wt%.
Take 28.1g ammonium molybdates, 13.3g cobalt nitrates to be added in 30ml distilled water, add after ammoniacal liquor regulation pH value, then spend Ionized water dilutes, and is made into complex carrier of the maceration extract dipping containing zinc oxide-alumina, obtained catalyst precursor is at 120 DEG C 6h is calcined at 550 DEG C after drying, catalyst 1 is obtained.Catalyst 1 is mainly constituted:Cobalt oxide 4wt%, molybdenum oxide 12wt%, it is oxygen-containing Change the complex carrier 84wt% of zinc-aluminum oxide.
Comparative example 1
Zinc nitrate solution, sodium metaaluminate and the sodium carbonate liquor of amount same as Example 1 are well mixed by blending method, with reality Apply the zinc-aluminium mol ratio of example 1 identical, similarity condition aging, washing, drying, roasting obtain the oxide material containing zinc-aluminium.Zinc oxide Content be 65%;Specific surface area is 141m2/g.Compared with comparative example 1, embodiment 1 is using pH swing methods zinc, the friendship of aluminum solutions For titration, zinc-aluminium stratified material can be obtained, in two kinds of material zinc-aluminium mol ratios under the same conditions, embodiment 1 is containing zinc-aluminium point The specific surface area of the zinc oxide stratified material of spar is higher.
Phosphatase 11 .04g, potassium nitrate 1.03g are weighed respectively, and magnesium nitrate 8.88g, which is dissolved completely in be made into 60g distilled water, to be contained Phosphorus, potassium, the aqueous solution of magnesium.6.0g Sodium Polyacrylates are dissolved in 70g distilled water, add the nitre that 3.8g mass concentrations are 65% Acid.Oxide materials of the 40g containing zinc-aluminium and 164.3g boehmites ground and mixed is uniform, 6.0g sesbania powders are added, are gathered PAA acid solution, phosphorous, potassium, the aqueous solution of magnesium, kneading after shaping, is calcined at 125 DEG C of drying process 7 hours, 580 DEG C Processing obtains carrier in 7 hours.Take 28.1g ammonium molybdates, 13.3g cobalt nitrates to be added in 30ml distilled water, add ammoniacal liquor regulation pH After value, then diluted with deionized water, be made into maceration extract impregnated carrier, obtained catalyst precursor dried at 120 DEG C after 550 DEG C roasting 6h, obtain comparative catalyst 1.
Embodiment 2
The preparation method and step be the same as Example 1 of complex carrier containing zinc oxide-alumina, are prepared containing gahnite Zinc oxide, pH value is adjusted to 8.7.In terms of oxide, the content of zinc oxide is 70%;Specific surface area is 191m2/g。
Complex carrier includes the zinc oxide 25wt% containing gahnite, and aluminum oxide is 71.9wt%, adjuvant component phosphorus, Potassium, content of magnesium are respectively P2O50.4wt%, K2O 0.8wt%, MgO 0.6wt%.
Except that obtaining after complex carrier, table is carried out to the complex carrier containing zinc oxide-alumina using potassium and magnesium Face is modified, and detailed process comprises the following steps:Configuration, as spray liquid, weighs nitric acid respectively containing potassium nitrate and magnesium nitrate aqueous solution Potassium 1.5g, magnesium nitrate 11.9g, are dissolved completely in 30ml distilled water, then are diluted with deionized water, spray zinc oxide-alumina Complex carrier so that the content of potassium and magnesium is 1.1 times of the content of internal potassium and magnesium outside carrier.Obtained through drying, roasting Used additives potassium and magnesium carry out the zinc oxide-alumina complex carrier of surface modification.Complex carrier specific surface area 238m2/g。
Ammonium molybdate, cobalt nitrate are made into maceration extract, dipping used additives potassium and magnesium carry out the zinc oxide-alumina of surface modification Complex carrier, specific steps be the same as Example 1.It is calcined 6.5 hours at being dried 6 hours, 550 DEG C at 120 DEG C, obtains hydrodesulfurization Catalyst 2.Catalyst 2 is mainly constituted:Cobalt oxide 3.5wt%, molybdenum oxide 11wt%, used additives potassium and magnesium carry out surface modification Zinc oxide-alumina complex carrier 85.5wt%.
Embodiment 3
The preparation method and step be the same as Example 1 of complex carrier containing zinc oxide-alumina.Prepare containing gahnite Zinc oxide, pH value is adjusted to 9.3.Zinc oxide containing gahnite, in terms of oxide, the content of zinc oxide is 63%;Compare table Area is 214m2/g。
Complex carrier includes the zinc oxide 18.3wt% containing gahnite, and aluminum oxide is 79wt%, adjuvant component phosphorus, Potassium, content of magnesium are respectively P2O50.9wt%, K2O 0.8wt%, MgO 1.0wt%.Complex carrier specific surface area 242m2/g。
Ammonium molybdate, cobalt nitrate are made into maceration extract, the complex carrier containing zinc oxide-alumina is impregnated, specific steps are with real Apply example 1.It is calcined 6 hours at being dried 4 hours, 600 DEG C at 130 DEG C, obtains Hydrobon catalyst 3.Main group of catalyst 3 Into:Cobalt oxide 6wt%, molybdenum oxide 9wt%, the complex carrier 85wt% containing zinc oxide-alumina.
Embodiment 4
The preparation method and step be the same as Example 1 of complex carrier containing zinc oxide-alumina, are prepared containing gahnite Zinc oxide, pH value is adjusted to 8.6.Zinc oxide containing gahnite, in terms of oxide, the content of zinc oxide is 75%;Compare table Area is 213m2/g。
Complex carrier includes the zinc oxide 22.9wt% containing gahnite, and aluminum oxide is 75wt%, adjuvant component phosphorus, Potassium, content of magnesium are respectively P2O51.1wt%, K2O 0.4wt%, MgO 0.6wt%.Complex carrier specific surface area 256m2/g。
Ammonium molybdate, cobalt nitrate are made into maceration extract, add ammoniacal liquor regulation pH value make salt all after dissolving dipping containing zinc oxide- The complex carrier of aluminum oxide, specific steps be the same as Example 1.It is calcined 7 hours, is added at being dried 5 hours, 550 DEG C at 120 DEG C Hydrogen desulphurization catalyst 4.Catalyst 4 is mainly constituted:Cobalt oxide 2.5wt%, molybdenum oxide 10wt%, answering containing zinc oxide-alumina Close carrier 87.5wt%.
Embodiment 5
The preparation method and step be the same as Example 1 of complex carrier containing zinc oxide-alumina, are prepared containing gahnite Zinc oxide, pH value is adjusted to 8.7.Zinc oxide containing gahnite, in terms of oxide, the content of zinc oxide is 67%;Compare table Area is 191m2/g。
Complex carrier includes the zinc oxide 30wt% containing gahnite, and aluminum oxide is 68wt%, adjuvant component phosphorus, potassium, Content of magnesium is respectively P2O50.6wt%, K2O 1.0wt%, MgO 0.4wt%.Complex carrier specific surface area 279m2/g。
The present embodiment and example 2 are similar, except that obtaining after complex carrier, using potassium and magnesium to containing zinc oxide-oxidation The complex carrier of aluminium carries out surface modification, and detailed process comprises the following steps:Configuration contains potassium nitrate and magnesium nitrate aqueous solution, spray Zinc oxide-alumina complex carrier so that the content of carrier outside potassium and magnesium is 1.4 times of the content of internal potassium and magnesium.Through dry Dry, roasting obtains used additives potassium and magnesium carries out the zinc oxide-alumina complex carrier of surface modification.
Ammonium molybdate, cobalt nitrate are made into maceration extract, adding ammoniacal liquor regulation pH value makes salt impregnate used additives potassium after all dissolving The zinc oxide-alumina complex carrier of surface modification, specific steps be the same as Example 2 are carried out with magnesium.Dried 5 hours at 130 DEG C, It is calcined 6 hours at 600 DEG C, obtains Hydrobon catalyst 5.Catalyst 5 is mainly constituted:Cobalt oxide 5wt%, molybdenum oxide 7wt%, Complex carrier 88wt% containing zinc oxide-alumina.
By catalyst 1-5, comparative catalyst 1 is respectively charged into 10ml fixed bed reactors, carries out evaluation catalyst reaction Performance.Presulfurization is carried out to catalyst with sulfurized oil, sulfurized oil is direct steaming gasoline, and vulcanizing agent is CS2, its concentration is 1.0wt%; Sulfide stress is 2.8MPa, and hydrogen to oil volume ratio is 300, and sulfurized oil volume space velocity is 3.0h-1, vulcanization program for respectively 220 DEG C, 280 DEG C of vulcanizing treatment 6h.After vulcanizing treatment terminates, full cut FCC gasoline replacement Treatment 8h is switched to, treats that pre-vulcanization process terminates Afterwards, reaction process condition is adjusted to, enters catalytically cracked gasoline reaction.Reaction process condition is:240 DEG C of temperature of reactor, reaction Pressure 1.6MPa, volume space velocity 2.4h-1, hydrogen to oil volume ratio 240.React sampling analysis after about 55h, catalyst and contrast medium reaction Product property is shown in Table 1.As can be seen from Table 1, Hydrobon catalyst loss of octane number is low, and desulfurization degree is high, good catalyst activity. In the case where desulfurization degree is not less than 77%, alkene saturation factor (HYD) is only 9% or so, is selected with good hydrodesulfurization Property.Study on the stability, reaction operation 500h, Hydrobon catalyst 1,2 and 5 product desulfurization degrees point are carried out to catalyst 1,2,5 Not Wei 80.0%, 81.1% and 83.2%, loss of octane number is respectively 0.4 unit, 0.3 unit and 0.3 unit, HYD Respectively 10,10 and 9.The complex carrier surface of catalyst 2 and 5 produces more active sites load centres, effectively improves and urges Agent is desulphurizing activated, and catalyst reaction performance is stable.
The catalyst of table 1 and contrast medium reactor product property
Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence Various corresponding changes and deformation, but these corresponding changes and deformation can be made according to the present invention by knowing those skilled in the art Protection scope of the present invention should all be belonged to.

Claims (10)

1. a kind of complex carrier containing zinc oxide-alumina, it is characterised in that:
Including the zinc oxide containing gahnite, aluminum oxide, adjuvant component phosphorus, potassium and magnesium, the composition of complex carrier is with oxide Quality meter:Zinc oxide content containing gahnite is 5.0-40.0wt%, and alumina content is 60.0-95.0wt%, auxiliary agent The content of component phosphorus, potassium and magnesium accounts for the percentage composition respectively P of carrier quality2O50.2-1.2wt%, K2O 0.2-2.5wt%, MgO 0.2-2.5wt%, complex carrier specific surface area 200-300m2/g。
2. a kind of complex carrier containing zinc oxide-alumina according to claim 1, it is characterised in that:
The composition of described complex carrier is with oxidation material gauge:Zinc oxide content containing gahnite is 10.0- 35.0wt%, alumina content is 65.0-90.0wt%, and the percentage that the content of adjuvant component phosphorus, potassium and magnesium accounts for carrier quality contains Amount is respectively P2O50.2-1.2wt%, K2O 0.2-2.5wt%, MgO 0.2-2.5wt%, complex carrier specific surface area 200- 300m2/g。
3. a kind of preparation method of the complex carrier containing zinc oxide-alumina described in claim 1 or 2, it is characterised in that including Following steps:
Soluble salt solutions and zinc-containing solution containing aluminium are alternately titrated by non-constant pH, the oxygen containing gahnite is prepared Change zinc stratified material;Zinc oxide and boehmite containing gahnite are well mixed, sesbania powder, nitric acid acidifying is added The acid solution containing Sodium Polyacrylate after processing, and phosphoric acid, potassium nitrate and magnesium nitrate the aqueous solution, kneading, after shaping, dry Processing, calcination process obtains containing zinc oxide-alumina composite carrier.
4. a kind of preparation method of complex carrier containing zinc oxide-alumina according to claim 3, it is characterised in that: The described zinc oxide containing gahnite, in terms of oxide, the content of zinc oxide is 60-90wt%, and specific surface area is 160- 220m2/ g, when controlling the content of zinc oxide in 65-80%, specific surface area 170-200m2/g;Exist in the content of control zinc oxide During 70-80wt%, specific surface area 190-220m2/g。
5. a kind of preparation method of complex carrier containing zinc oxide-alumina according to claim 3, it is characterised in that: The described zinc oxide stratified material prepared containing gahnite, is prepared by the following preparation method:Soluble zinc salt is molten Liquid is divided into 2-4 parts, under the conditions of 40-80 DEG C, and the mixed solution containing aluminium of sodium metaaluminate and sodium carbonate is added in a zinc solution, Stop that mixed solution containing aluminium is added dropwise when pH value reaches 8.5-9.5;It is further continued for that another zinc solution is added dropwise;Zinc solution is added dropwise After complete, continue that mixed solution containing aluminium is added dropwise, stop that mixed solution containing aluminium is added dropwise when pH value reaches 8.5-9.5;According to the above method Aluminium mixed solution will be contained and replace titration with zinc solution, until the whole completion of dropping of zinc solution, last time is added dropwise mixed containing aluminium Solution is closed, when pH value reaches 8.5-9.5, the alternating titration process of non-constant pH value terminates, control titration process is in 1-6h Complete;After 80-95 DEG C of aging 2-8h, cooling washing to neutrality, in 80-140 DEG C of dry 4-10h, 450-550 DEG C of roasting 4- 10h, obtains the dispersed zinc oxide stratified material containing gahnite.
6. a kind of preparation method of complex carrier containing zinc oxide-alumina according to claim 5, it is characterised in that: The soluble zinc salt is zinc nitrate or zinc chloride.
7. a kind of preparation method of complex carrier containing zinc oxide-alumina according to claim 3, it is characterised in that: The acid solution containing Sodium Polyacrylate after described nitric acid acidification, is prepared by the following preparation method:By deionized water plus Heat arrives 30-90 DEG C, and then nitric acid is dissolved into deionized water, adds Sodium Polyacrylate, and dissolves complete, obtains containing poly- third The acid solution of olefin(e) acid sodium.The Sodium Polyacrylate of acidified processing, the addition of described Sodium Polyacrylate is boehmite 0.6-12wt%.
8. a kind of preparation method of complex carrier containing zinc oxide-alumina according to claim 3, it is characterised in that: The addition of the sesbania powder is the 0.2-7wt% of boehmite.
9. a kind of preparation method of complex carrier containing zinc oxide-alumina according to claim 3, it is characterised in that: Described drying, roasting obtains Hydrobon catalyst, refers to roast at drying 4-6 hours, 550-650 DEG C at 110-140 DEG C Burning obtains Hydrobon catalyst in 6-8 hours;Described drying process, calcination process refers to 110-150 DEG C of drying process 4-8 Hour, calcination process 4.5-8 hours at 550 DEG C -700 DEG C.
10. a kind of preparation method of complex carrier containing zinc oxide-alumina according to claim 3, it is characterised in that: The complex carrier containing zinc oxide-alumina obtained to claim 3, using potassium and magnesium to being combined containing zinc oxide-alumina Carrier surface is modified, and carrier surface modification is carried out as follows:Configure the aqueous solution spray containing potassium nitrate and magnesium nitrate Drench the complex carrier containing zinc oxide-alumina, through drying, roasting obtain used additives potassium and magnesium carry out the zinc oxide of surface modification- Potassium oxide and content of magnesia are respectively in 0.2-2.5wt% in alumina composite carrier, control zinc oxide-alumina complex carrier In the range of 0.2-2.5wt%, and the content of carrier surface potassium oxide and magnesia is set to be that internal oxidation potassium and magnesia contain 1.05-1.6 times of amount.
CN201710158372.0A 2017-03-17 2017-03-17 A kind of complex carrier of the aluminum oxide containing zinc oxide and preparation method thereof Pending CN106955746A (en)

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Application publication date: 20170718