CN1112321C - Preparation method for zirconium dioxide - Google Patents
Preparation method for zirconium dioxide Download PDFInfo
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- CN1112321C CN1112321C CN 00100554 CN00100554A CN1112321C CN 1112321 C CN1112321 C CN 1112321C CN 00100554 CN00100554 CN 00100554 CN 00100554 A CN00100554 A CN 00100554A CN 1112321 C CN1112321 C CN 1112321C
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Abstract
The present invention relates to a preparation method for zirconium dioxide, which comprises: firstly, zirconium oxychloride is prepared into a water solution for standby, the ZrOCl2 water solution is dropped into precipitant and after a standing still and aging process, Zr(OH)4 hydrosol is obtained; then, after the Zr(OH)4 hydrosol is washed by ionized water, and is sucked, flitered or centrifugal separated, Zr(OH)4 hydrogel is obtained; the Zr(OH)4 hydrogel is dried and calcined to obtain the ZrO2 of the present invention. The Zr(OH)4 which is prepared by the method proposed by the present invention can be used as a catalyst or a catalyst carrier for various chemical reactions. ZrO2 catalysts or catalyst carriers of different specific surface areas, particle sizes and surface acid-base properties can also be prepared according to actual reaction requirements.
Description
Technical field
The present invention relates to be used for the preparation method of catalyzer or support of the catalyst zirconium dioxide, belong to the chemical catalyst preparation
Technical field.
Background technology
Because ZrO
2Itself have acidity, alkalescence and oxidation, reducing property simultaneously and be widely used in catalysis technical field (Materials Chem.Phys., 1985,133:47).ZrO
2Both can be used as catalyzer use separately (Catal.Today, 1994,20:185), for example: with the ZrO of proper method preparation
2Mate when suitable in acid, alkaline matter, the synthetic gas preparing isobutene is shown catalytic performance preferably; Japanese Patent 4613700 reports, ZrO
2Can be used as the catalyzer of aromatic carboxylic acid hydrogenation preparing aldehyde, right-p t butylbenzoic acid and right-corresponding aldehyde of tolyl acid hydrogenation preparing have successfully been realized industrialization; ZrO
2Itself can also the catalyzed alkene isomerization, diene hydrogenation, alcohols dehydration and by the reaction of synthesis gas preparation isomery hydro carbons.ZrO
2Also can be used as support of the catalyst and to many catalyzer show preferably support effect (Catal.Today, 1994,20:199), for example: work as B
2O
3Be carried on ZrO
2The time can be used as the cyclohexanone-oxime Beckmann rearrangement catalyzer (Appl.Catal., 1999,188:361); When at ZrO
2The a small amount of SO of middle adding
4 2-The time, the strong solid acid catalyst that can obtain having super acids character, be used for catalysis isomerization of paraffins reaction (Topics inCatalysis, 1998,6:61); German patent DE 9400513 reports, Pt/ZrO
2Catalyzer is used for the catalyzer of preparing synthetic gas by reforming methane with carbon dioxide, can use continuously 500 hours and keeps active constant; We find nearest result of study, with " the pure ZrO of supercritical drying
2" during as same catalyst for reaction, can make the transformation efficiencys of methane and carbonic acid gas surpass 14% at 800 ℃.The Ni/ZrO of high Ni content
2When catalyzer is used for methane reforming reaction by using carbon dioxide, have higher activity, stability and anti-carbon deposit performance: at 1030K, GHSV=2.4 * 10
4Under the reaction conditions of ml/hg-cat, this catalyzer can make CH
4And CO
2Transformation efficiency reach or near equilibrium conversion, and catalyzer is after using 600 hours, active in decline, (CN1234666A) has a good application prospect.But, not all ZrO
2During as carrier, reforming reaction is all shown good catalytic performance.ZrO
2Preparation method's difference can cause Ni/ZrO
2The reactivity worth of catalyzer produces very big difference.Equally, for different reaction systems, need different methods to prepare the physics ZrO different with chemical property
2Therefore, adopt different methods to prepare the ZrO that surface acid alkalescence matter, particle diameter and specific surface have nothing in common with each other
2Catalyzer or support of the catalyst have very important significance at catalytic field.
Chinese patent 90108855.4 once disclosed a kind of preparation ZrO
2Method, be that zirconium oxychloride is dissolved in the dense formic acid, and add suitable rare earth halide used as stabilizers that moisture, halogenide and formic acid in the solution are removed in evaporation then.The ZrO that this method is prepared
2Powder is mainly used in the optics purpose, but and is not suitable for being applied to catalysis technical field.Because the negatively charged ion that this method is introduced is more, and most catalyzed reaction is highstrung to impurity, a small amount of anionic existence may cause diverse catalytic performance.
Summary of the invention
The objective of the invention is to propose several ZrO
2The novel method of preparation, thus develop ZrO with different physicochemical property
2The ZrO that these granularities are different with surface properties
2Powder can be used as the catalyzer or the support of the catalyst of differential responses system.
ZrO of the present invention
2Presoma can be ZrOCl
2, ZrO (NO
3)
2And various hydrates, other inorganic salt that also can be zirconium are (as ZrCl
4, Zr (NO
3)
4) etc.
ZrO of the present invention
2The preparation method comprise following each step:
(1) will contain the commodity zirconium oxychloride ZrOCl of crystal water
28H
2It is that the aqueous solution of 0.05～0.5mol/L is standby that O is mixed with concentration, is that 25% commodity ammoniacal liquor dilution is made precipitation agent for 2～15 times with concentration, under the condition of continuously stirring, with the speed of 1～20ml/min with the ZrOCl for preparing
2The aqueous solution is added drop-wise in this precipitation agent, control ZrOCl
2The add-on of the aqueous solution makes the final pH value of solution between 9～13.Perhaps precipitation agent ammoniacal liquor is added drop-wise to ZrOCl
2In the aqueous solution, the add-on of control ammoniacal liquor is between 3～6 the final pH value of solution.Dropwise the back and continue to stir 0.5～4 hour, left standstill aging 3～12 hours, obtain Zr (OH)
4The water-sol;
(2) with the Zr (OH) of above-mentioned preparation
4The water-sol washs and is dry, and with last preparation zirconium dioxide, this washing and exsiccant method comprise following five kinds:
First method:
With Zr (OH)
4The water-sol with deionized water wash to using AgNO
3Solution can not detect Cl
-Till (the ratio electricity of washings is led less than 10
-5Ω
-1m
-1).Obtain Zr (OH) after suction filtration or the centrifugation
4Hydrogel.At normal pressure, under 110～350 ℃ of situations, drying is 2～24 hours in the air atmosphere, promptly gets Zr (OH) with this hydrogel
4, surface-area 300～170m
2/ g.With this Zr (OH)
4400～700 ℃ of roastings 3～10 hours, obtain ZrO
2, specific surface 100～15m
2/ g, granular size is 80～150nm.
Second method:
With Zr (OH)
4Hydrogel under normal pressure, 110～350 ℃ condition, N
2Drying is 2～24 hours in the atmosphere, promptly gets Zr (OH)
4, specific surface 350～100m
2/ g is with this Zr (OH)
4400～700 ℃ of roastings 3～10 hours, obtain ZrO
2, specific surface 150～25m
2/ g, particle diameter 20～60nm.
The third method:
With Zr (OH)
4Hydrogel obtains alcogel with every gram hydrogel 5～150ml absolute ethanol washing l～5 times.This alcogel under normal pressure, 110～350 ℃ condition, in the air atmosphere dry 2～24 hours, is promptly got Zr (OH)
4, specific surface 350～250m
2/ g.With this Zr (OH)
4400～700 ℃ of roastings 3～10 hours, obtain ZrO
2, specific surface 160～35m
2/ g, particle diameter 15～40nm.
The 4th kind of method:
With Zr (OH)
4Hydrogel obtains alcogel, Zr (OH) with every gram hydrogel 5～150ml absolute ethanol washing 1～5 time
4Alcogel under normal pressure, 110～350 ℃ condition, N
2Drying is 2～24 hours in the atmosphere, promptly gets Zr (OH)
4, specific surface 360～220m
2/ g is with this Zr (OH)
4400～700 ℃ of roastings 3～10 hours, obtain ZrO
2, specific surface 200～50m
2/ g, particle diameter 15～30nm.
The 5th kind of method:
With Zr (OH)
4Hydrogel obtains alcogel, Zr (OH) with every gram hydrogel 5～150ml absolute ethanol washing 1～5 time
4Alcogel places autoclave, adds 2～50ml/ (g alcogel) dehydrated alcohol, logical N
2To the still internal pressure be 60～80atm, be warming up to 260 ℃ and make alcohol solvent be in supercritical state and kept 0.2～8 hour.Pressure release, logical N
2To remove ethanol remaining in the still, obtain Zr (OH)
4, specific surface 120～220m
2/ g, particle diameter 5～10nm is with this Zr (OH)
4400～700 ℃ of roastings 3～10 hours, obtain ZrO
2, specific surface 100～30m
2/ g, particle diameter 15～30nm.
The ZrO that the method that proposes with the present invention prepares
2, can be as the catalyzer or the support of the catalyst of various chemical reactions.Compare with the traditional preparation process method, this invention can be prepared specific surface, granular size and the different ZrO of surface acid alkalescence matter according to the needs of real reaction
2Catalyzer or support of the catalyst.
Embodiment
The invention will be further described below by embodiment, but this invention is not limited to the following examples.
Embodiment 1-3 makes the example of catalyzer or support of the catalyst for the zirconium dioxide that uses the first method preparation:
Embodiment 1: take by weighing 16g ZrOCl
28H
2O is mixed with the aqueous solution of 0.17M, and the ammoniacal liquor dilution with 25% places beaker as precipitation agent for 10 times, under vigorous stirring, slowly splashes into ZrOCl
2The aqueous solution, and control pH value of solution value is 10, after dropwising, continues to stir 0.5 hour, aging 2 hours then, and with deionized water wash to there not being Cl substantially
-Till, put into baking oven behind the suction filtration, 110 ℃ of dryings 12 hours obtain Zr (OH)
4(A), with Zr (OH)
4(A) put into retort furnace, 550 ℃ of roastings 3 hours obtain ZrO
2(A), specific surface 40m
2/ g.With ZrO
2(A) grind compressing tablet after, be broken into 20～40 purpose particles, getting 2ml, to place internal diameter be 8mm De Bu Rust steel reactor, it carried out the activity rating of synthetic gas preparing isobutene on self-built micro-reactor.The result shows, at CO/H
2=1: 1, P=5MPa, T=450 ℃, GHSV=800h
-1Reaction conditions under, can make the transformation efficiency of CO reach 21%, the selectivity 40% of iso-butylene in the hydrocarbon product, the yield 4.1% of iso-butylene, space-time yield 1.46 * 10
-3Mol/ (hg-cat).
Embodiment 2: take by weighing 16g ZrOCl
28H
2O is mixed with the aqueous solution of 0.17M, and the ammoniacal liquor with 25% dilutes 10 times as precipitation agent, under vigorous stirring, ammoniacal liquor is slowly splashed into ZrOCl
2In the aqueous solution, and control pH value of solution value is 3, after dropwising, continue to stir 0.5 hour, aging 2 hours then, and with deionized water wash to there not being Cl substantially
-Till, put into baking oven behind the suction filtration, 270 ℃ of dryings 6 hours obtain Zr (OH)
4(A), specific surface 160m
2/ g.Measure a certain amount of 4% boric acid aqueous solution, the Zr (OH) that has prepared with this boric acid solution dipping 10g
4(A), stirring at room is after 1.5 hours, and rotary evaporation is to doing, 110 ℃ of dryings 12 hours, and dried sample moves in the retort furnace, and 700 ℃ of roastings 10 hours make B
2O
3/ ZrO
2(A) catalyzer, chemical titration is analyzed B
2O
3Weight percent is 11%.With B
2O
3/ ZrO
2(A) behind the catalyzer compressing tablet, be broken into 20～40 purpose particles, getting 1.6g, to place internal diameter be the glass reactor of 10ml, carries out the Beckmann rearrangement of cyclohexanone-oxime on self-built reaction unit.Elder generation is at N before the catalyst reaction
2Under the atmosphere, 350 ℃ of pre-treatment 1.5 hours are cooled to 300 ℃ then, and use N
210% cyclohexanone-oxime benzole soln is brought in the reactor, and the air speed of reactant cyclohexanone-oxime is WHSV=0.32h
-1React.In the reaction times is in 10 hours, can make cyclohexanone-oxime reach 100% and transform, and the selectivity of hexanolactam is up to 97～99%.
Embodiment 3: take by weighing 16g ZrOCl
28H
2O is mixed with the aqueous solution of 0.17M, and the ammoniacal liquor dilution with 25% places beaker as precipitation agent for 10 times, under vigorous stirring, slowly splashes into ZrOCl
2The aqueous solution, and control pH value of solution value is 11, after dropwising, continues to stir 0.5 hour, aging 2 hours then, and with deionized water wash to there not being Cl substantially
-Till, put into baking oven behind the suction filtration, 350 ℃ of dryings 3 hours obtain Zr (OH)
4(A), with ZrO
2For pickling process is adopted in the preparation of the loaded catalyst of carrier.Promptly take by weighing given commodity Ni (NO
3)
26H
2O is mixed with 10% the aqueous solution, with this Ni (NO
3)
2Solution floods an amount of Zr that has prepared (OH) respectively
4(A), after 2 hours, rotary evaporation is followed 110 ℃ of dryings 12 hours to doing to the dipping system in stirring at room.Dried sample moves into retort furnace 650 ℃ of roastings 5 hours, makes nickel content (Ni wt%) and be 10～15% Ni/ZrO
2Catalyzer.With this catalyzer α-Al
2O
3After 2: 5 dilution proportion, grind compressing tablet, be broken into 20～40 purpose particles, getting 350mg, to place internal diameter be the quartz tube reactor of 10ml, carries out the evaluation of preparing synthetic gas by reforming methane with carbon dioxide reactive behavior on self-built atmospheric fixed bed flow reactor.Catalyzer is used H before reaction
2/ N
2The gas mixture of (1: 9) is warming up to 800 ℃ then in 700 ℃ of reduction 3 hours.Under normal pressure, with the flow velocity of 80ml/min with CO
2/ CH
4(1: 1) feeds reactor, air speed GHSV=2.4 * 10
4Ml/hg-cat, gas chromatographic detection tail gas is formed.Reaction result shows that the initial conversion of methane is 87%, but after using 50 hours, methane conversion drops to 60%.
Embodiment 4-6 makes the example of catalyzer or support of the catalyst for the zirconium dioxide that uses the second method preparation:
Embodiment 4-6:
The preparation method of hydrogel is with embodiment 1, with Zr (OH)
4Hydrogel under normal pressure, certain temperature, N
2Dry some hrs in the atmosphere promptly gets Zr (OH)
4(B), with this Zr (OH)
4Roasting at a certain temperature 3～10 hours obtains ZrO
2(B), drying temperature and time, maturing temperature and time are as shown in table 1.With different drying temperatures, time, maturing temperature, prepared ZrO of time
2(B) as the support of the catalyst of methane reforming reaction by using carbon dioxide, Preparation of catalysts method and activity rating of catalyst method are with embodiment 3.Experimental result shows that this several catalytic agent can make the initial conversion of methane reach 89%, but catalyzer is after using 90 hours, and methane conversion drops to 66%.
Table 1:
The embodiment drying temperature/℃ the time of drying/h maturing temperature/℃ roasting time/h
4 110 24 400 10
5 270 12 650 5
6 350 6 700 3
Embodiment 7-9 makes the example of catalyzer or support of the catalyst for the zirconium dioxide that uses the third method preparation:
Embodiment 7-9:
The preparation method of hydrogel is with embodiment 1, with Zr (OH)
4Hydrogel obtains alcogel with every gram hydrogel 100ml absolute ethanol washing 3 times.With Zr (OH)
4Alcogel is under normal pressure, certain temperature, and dry some hrs in the air atmosphere promptly gets Zr (OH)
4(C), with this Zr (OH)
4Roasting at a certain temperature 3～10 hours obtains ZrO
2(C), drying temperature and time, maturing temperature and time are as shown in table 2.With different drying temperatures, time, maturing temperature, prepared ZrO of time
2(C) as the support of the catalyst of methane reforming reaction by using carbon dioxide, Preparation of catalysts method and activity rating of catalyst method are with embodiment 3.Experimental result shows that this several catalytic agent can make the initial conversion of methane reach 83%, but catalyzer is after using 90 hours, and methane conversion drops to 69%.
Table 2:
The embodiment drying temperature/℃ the time of drying/h maturing temperature/℃ roasting time/h
7 110 24 400 10
8 270 12 650 5
9 350 6 700 3
Embodiment 10-12 makes the example of catalyzer or support of the catalyst for the zirconium dioxide that uses the 4th kind of method preparation:
Embodiment 10-12:
The preparation method of hydrogel is with embodiment 1, with Zr (OH)
4Hydrogel obtains alcogel with every gram hydrogel 120ml absolute ethanol washing 2 times.With Zr (OH)
4Alcogel under normal pressure, certain temperature, N
2Dry some hrs in the atmosphere promptly gets Zr (OH)
4(D), with this Zr (OH)
4Roasting at a certain temperature 3～10 hours obtains ZrO
2(D), drying temperature and time, maturing temperature and time are as shown in table 3.With different drying temperatures, time, maturing temperature, prepared ZrO of time
2(D) as the support of the catalyst of methane reforming reaction by using carbon dioxide, Preparation of catalysts method and activity rating of catalyst method are with embodiment 3.Experimental result shows that this several catalytic agent can make the initial conversion of methane reach 86%, and catalyzer is after using 100 hours, and methane conversion is without any decline.
Table 3:
The embodiment drying temperature/℃ the time of drying/h maturing temperature/℃ roasting time/h
10 110 24 400 10
11 270 12 650 5
12 350 6 700 3
Embodiment 13 and 14 is the example that the zirconium dioxide of the 5th kind of method preparation of use is made catalyzer or support of the catalyst:
Embodiment 13: the preparation method of hydrogel with 15ml/ (g alcogel) absolute ethanol washing hydrogel twice, obtains Zr (OH) with embodiment 1 behind the suction filtration
4Alcogel places autoclave with alcogel, adds 15ml/ (g alcogel) dehydrated alcohol, logical N
2To the still internal pressure be 80atm, be warming up to 260 ℃ and kept 4 hours, pressure release, logical N
2To remove ethanol remaining in the still, obtain Zr (OH)
4(E), specific surface 160m
2/ g, particle diameter 6nm.650 ℃ of roastings obtained the ZrO of supercritical drying after 5 hours
2(E), specific surface 53m
2/ g, particle diameter 16nm.With ZrO
2(E) grind compressing tablet after, be broken into 20～40 purpose particles, getting 200mg, to place internal diameter be the quartz tube reactor of 10ml, carries out the evaluation of preparing synthetic gas by reforming methane with carbon dioxide reactive behavior on self-built atmospheric fixed bed flow reactor.The evaluation method of catalyzer is with embodiment 3.Different is that catalyzed reaction is to carry out at 800 ℃.Experimental result shows, reaching in time of 50 hours CO
2Average conversion reach 13%, CH
4Average conversion reach 10%, the selectivity 100% of CO, catalyzer takes place without any the coking deactivation phenomenon after using 50 hours.
Embodiment 14: the preparation method of hydrogel with 25ml/ (g alcogel) absolute ethanol washing hydrogel twice, obtains Zr (OH) with embodiment 1 behind the suction filtration
4Alcogel places autoclave with alcogel, adds 10ml/ (g alcogel) dehydrated alcohol, logical N
2To the still internal pressure be 60atm, be warming up to 270 ℃ and kept 2 hours, pressure release, logical N
2To remove ethanol remaining in the still, obtain Zr (OH)
4(E).ZrO
2(E) as the support of the catalyst of methane reforming reaction by using carbon dioxide, Preparation of catalysts method and activity rating of catalyst method are with embodiment 3.Experimental result shows that this catalyzer can make CH
4Initial conversion reach 81%, catalyzer used after 200 hours, catalyst activity is without any decline.
Comparative example 1: measure a certain amount of 4% boric acid aqueous solution,, make B with this boric acid solution dipping HZSM-5 carrier
2O
3Weight percent is 10% B
2O
3/ HZSM-5 catalyzer.This catalyzer is used for the Beckmann rearrangement of cyclohexanone-oxime, and the pre-treatment of catalyzer and activity rating condition are with embodiment 2.In the time of 6 hours, the transformation efficiency of cyclohexanone-oxime only is 69.6% in reaction, and the selectivity of hexanolactam has only 93.6%.
Comparative example 2: take by weighing given commodity Ni (NO
3)
26H
2O is mixed with 10% the aqueous solution, with this Ni (NO
3)
2Commodity γ-Al that solution impregnation is an amount of
2O
3Carrier makes Ni content and is Ni/ γ-Al of 5%
2O
3Catalyzer, and this catalyzer is used for the reaction of preparing synthetic gas by reforming methane with carbon dioxide, catalyst pretreatment condition and activity rating method are with embodiment 3.Reaction result is: CH
4Initial conversion be 75.7%, react CH after 100 hours
4Transformation efficiency drop to 45.3%.
Claims (5)
1, a kind of preparation method of zirconium dioxide is characterized in that this method comprises following each step:
(1) will contain the commodity zirconium oxychloride ZrOCl of crystal water
28H
2It is that the aqueous solution of 0.05～0.5mol/L is standby that O is mixed with concentration, is that 25% commodity ammoniacal liquor dilution is made precipitation agent for 2～15 times with concentration, under the condition of continuously stirring, with the speed of 1～20ml/min with the ZrOCl for preparing
2The aqueous solution is added drop-wise in this precipitation agent, control ZrOCl
2The add-on of the aqueous solution makes the final pH value of solution between 9～13, perhaps precipitation agent ammoniacal liquor is added drop-wise to ZrOCl
2In the aqueous solution, the final pH value that the add-on of control ammoniacal liquor makes solution dropwises the back and continues to stir 0.5～4 hour between 3～6, leaves standstill aging 3～12 hours, obtains Zr (OH)
4The water-sol;
(2) with Zr (OH)
4The water-sol with deionized water wash to using AgNO
3Solution can not detect Cl
-Till, the ratio electricity of washings is led less than 10
-5Ω
-1m
-1, obtain Zr (OH) after suction filtration or the centrifugation
4Hydrogel, at normal pressure, under 110～350 ℃ of situations, drying is 2～24 hours in the air atmosphere, promptly gets Zr (OH) with this hydrogel
4(A), surface-area 300～170m
2/ g is with this Zr (OH)
4400～700 ℃ of roastings 3～10 hours, promptly obtain ZrO
2
2, a kind of preparation method of zirconium dioxide is characterized in that this method comprises following each step:
(1) will contain the commodity zirconium oxychloride ZrOCl of crystal water
28H
2It is that the aqueous solution of 0.05～0.5mol/L is standby that O is mixed with concentration, is that 25% commodity ammoniacal liquor dilution is made precipitation agent for 2～15 times with concentration, under the condition of continuously stirring, with the speed of 1～20ml/min with the ZrOCl for preparing
2The aqueous solution is added drop-wise in this precipitation agent, control ZrOCl
2The add-on of the aqueous solution makes the final pH value of solution between 9～13, perhaps precipitation agent ammoniacal liquor is added drop-wise to ZrOCl
2In the aqueous solution, the final pH value that the add-on of control ammoniacal liquor makes solution dropwises the back and continues to stir 0.5～4 hour between 3～6, leaves standstill aging 3～12 hours, obtains Zr (OH)
4The water-sol;
(2) with Zr (OH)
4Hydrogel under normal pressure, 110～350 ℃ condition, N
2Drying is 2～24 hours in the atmosphere, promptly gets Zr (OH)
4, specific surface is 350～100m
2/ g is with this Zr (OH)
4400～700 ℃ of roastings 3～10 hours, promptly obtain ZrO
2
3, a kind of preparation method of zirconium dioxide is characterized in that this method comprises following each step:
(1) will contain the commodity zirconium oxychloride ZrOCl of crystal water
28H
2It is that the aqueous solution of 0.05～0.5mol/L is standby that O is mixed with concentration, is that 25% commodity ammoniacal liquor dilution is made precipitation agent for 2～15 times with concentration, under the condition of continuously stirring, with the speed of 1～20ml/min with the ZrOCl for preparing
2The aqueous solution is added drop-wise in this precipitation agent, control ZrOCl
2The add-on of the aqueous solution makes the final pH value of solution between 9～13, perhaps precipitation agent ammoniacal liquor is added drop-wise to ZrOCl
2In the aqueous solution, the final pH value that the add-on of control ammoniacal liquor makes solution dropwises the back and continues to stir 0.5～4 hour between 3～6, leaves standstill aging 3～12 hours, obtains Zr (OH)
4The water-sol;
(2) with Zr (OH)
4Hydrogel obtains alcogel with every gram hydrogel 5～150ml absolute ethanol washing 1～5 time, and this alcogel under normal pressure, 110～350 ℃ condition, in the air atmosphere dry 2～24 hours, is promptly got Zr (OH)
4, specific surface is 350～250m
2/ g is with this Zr (OH)
4400～700 ℃ of roastings 3～10 hours, promptly obtain ZrO
2
4, a kind of preparation method of zirconium dioxide is characterized in that this method comprises following each step:
(1) will contain the commodity zirconium oxychloride ZrOCl of crystal water
28H
2It is that the aqueous solution of 0.05～0.5mol/L is standby that O is mixed with concentration, is that 25% commodity ammoniacal liquor dilution is made precipitation agent for 2～15 times with concentration, under the condition of continuously stirring, with the speed of 1～20ml/min with the ZrOCl for preparing
2The aqueous solution is added drop-wise in this precipitation agent, control ZrOCl
2The add-on of the aqueous solution makes the final pH value of solution between 9～13, perhaps precipitation agent ammoniacal liquor is added drop-wise to ZrOCl
2In the aqueous solution, the final pH value that the add-on of control ammoniacal liquor makes solution dropwises the back and continues to stir 0.5～4 hour between 3～6, leaves standstill aging 3～12 hours, obtains Zr (OH)
4The water-sol; (4) with Zr (OH)
4Hydrogel obtains alcogel, Zr (OH) with every gram hydrogel 5～150ml absolute ethanol washing 1～5 time
4Alcogel under normal pressure, 110～350 ℃ condition, N
2Drying is 2～24 hours in the atmosphere, promptly gets Zr (OH)
4, specific surface is 360～220m
2/ g is with this Zr (OH)
4400～700 ℃ of roastings 3～10 hours, promptly obtain ZrO
2
5, a kind of preparation method of zirconium dioxide is characterized in that this method comprises following each step:
(1) will contain the commodity zirconium oxychloride ZrOCl of crystal water
28H
2It is that the aqueous solution of 0.05～0.5mol/L is standby that O is mixed with concentration, is that 25% commodity ammoniacal liquor dilution is made precipitation agent for 2～15 times with concentration, under the condition of continuously stirring, with the speed of 1～20ml/min with the ZrOCl for preparing
2The aqueous solution is added drop-wise in this precipitation agent, control ZrOCl
2The add-on of the aqueous solution makes the final pH value of solution between 9～13, perhaps precipitation agent ammoniacal liquor is added drop-wise to ZrOCl
2In the aqueous solution, the final pH value that the add-on of control ammoniacal liquor makes solution dropwises the back and continues to stir 0.5～4 hour between 3～6, leaves standstill aging 3～12 hours, obtains Zr (OH)
4The water-sol;
(2) with Zr (OH)
4Hydrogel obtains alcogel, Zr (OH) with every gram hydrogel 5～150ml absolute ethanol washing 1～5 time
4Alcogel places autoclave, adds 2～50ml/ (g alcogel) dehydrated alcohol, logical N
2To the still internal pressure be 60～80atm, be warming up to 260 ℃ and make alcohol solvent be in supercritical state and kept 0.2～8 hour, pressure release, logical N
2To remove ethanol remaining in the still, obtain Zr (OH)
4, specific surface is 120～220m
2/ g, particle diameter 5～10nm is with this Zr (OH)
4400～700 ℃ of roastings 3～10 hours, promptly obtain ZrO
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00100554 CN1112321C (en) | 2000-01-25 | 2000-01-25 | Preparation method for zirconium dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00100554 CN1112321C (en) | 2000-01-25 | 2000-01-25 | Preparation method for zirconium dioxide |
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Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100391853C (en) * | 2004-02-16 | 2008-06-04 | 华南理工大学 | Process of preparing zirconium oxide nano powder by supersonic sol-gel process |
| CN100336730C (en) * | 2004-02-17 | 2007-09-12 | 哈尔滨工程大学 | Preparation process for superfine powder of zirconium oxide |
| CN100404176C (en) * | 2004-12-21 | 2008-07-23 | 哈尔滨工程大学 | Preparation of zirconia superfine powder by hydrolysis method |
| CN1321942C (en) * | 2005-04-01 | 2007-06-20 | 清华大学 | Method for preparing Nano crystal of metal oxide of anti agglomeration |
| CN101113019B (en) * | 2007-07-03 | 2010-06-30 | 李树昌 | Method for reclaiming zirconium oxide and yttrium oxide from zirconium-containing solid waste |
| CN101391812B (en) * | 2008-10-29 | 2010-06-09 | 天津大学 | Method for preparing Y-doped sulfuric acid promoting type nano ZrO2 |
| CN101830507B (en) * | 2010-05-17 | 2012-03-28 | 山东理工大学 | Preparation process for synthesizing flaky nano zirconia by precipitation |
| CN101851005B (en) * | 2010-05-17 | 2011-08-31 | 山东理工大学 | Preparation method of high-dispersion zirconium oxide nano powder |
| CN101830506A (en) * | 2010-05-18 | 2010-09-15 | 潍坊天福化学科技有限公司 | Preparation method of high-purity nano zirconium dioxide |
| CN103007961A (en) * | 2012-12-13 | 2013-04-03 | 北京化工大学常州先进材料研究院 | Catalyst for eliminating CO in hydrogen source of fuel cell and preparation method of catalyst |
| CN107064020A (en) * | 2017-06-09 | 2017-08-18 | 刘胜 | A kind of domestic ceramics raw material whiteness proficiency testing sample |
| CN109550491A (en) * | 2018-11-07 | 2019-04-02 | 山东科技大学 | Prepare ZrO2The method of catalyst |
| CN110002496A (en) * | 2019-02-25 | 2019-07-12 | 王召惠 | A kind of anti-preparation method for peeling off zirconia coating Zirconium oxide powder |
| CN110586064B (en) * | 2019-09-27 | 2023-03-31 | 天津大学 | Lithium-doped zirconium oxide loaded indium oxide catalyst and preparation method and application thereof |
| CN111422904A (en) * | 2020-04-28 | 2020-07-17 | 青岛天尧新材料有限公司 | Method for producing zirconium hydroxide |
| CN114621095A (en) * | 2022-03-03 | 2022-06-14 | 安徽东至广信农化有限公司 | Clean nitrochlorobenzene production process |
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