CN105597774A - Catalyst used for preparing acrylonitrile - Google Patents
Catalyst used for preparing acrylonitrile Download PDFInfo
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- CN105597774A CN105597774A CN201410669272.0A CN201410669272A CN105597774A CN 105597774 A CN105597774 A CN 105597774A CN 201410669272 A CN201410669272 A CN 201410669272A CN 105597774 A CN105597774 A CN 105597774A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a catalyst used for preparing acrylonitrile, which solves the problems of low catalyst selectivity and poor stability for a propylene ammoxidation reaction in the prior art. The catalyst takes silica with silica sol source as a carrier, and contains the active ingredients expressed in a following general formula: AaBbCcBidMo13.6Ox; in a formula, A is selected from at least one of K, Rb and Cs; B is selected from at least one of Ca, Mn, Fe, Co, Ni, Mg, Cr, W, P and Nb; C is selected from at least one of rare earth elements; amount of the carrier accounts for 30-70 wt% of catalyst weight, wherein a mol ratio of chlorinity in silica sol to silicon atoms is 0.027*10<-2>-0.41*10<-2>. The problem can be better solved, and the catalyst can be used for industrial production of acrylonitrile through propylene ammoxidation.
Description
Technical field
The present invention relates to the method for the preparation of catalyst, preparation method and the ammoxidating propylene to produce acrylonitrile of acrylonitrile.
Background technology
The industrial production that current olefin ammoxidation is prepared unsaturated nitrile still generally adopts fluid bed ammonia oxidation process, and catalyst is as thisOne of core technology of technique, its research, improvement are paid attention to always. The catalyst of current industrial ammoxidating propylene to prepare acrylonitrileMainly contain two classes: Mo-Bi system and Sb system, wherein Mo-Bi series catalysts is occupied an leading position, and reaches 95% of olefin oxidation market,Forefathers' research and exploration also mainly concentrate on Mo-Bi series catalysts. By introduce the metal with variable valence state in catalystComponent can improve the oxidation-reducibility energy of catalyst as the element such as Fe, Ce, accelerates to recover the effective status of catalyst activity component;The metallic element that is greater than 0.8nm and is less than 0.8nm by introducing ionic radius, as units such as Cr, Ni, Mg, Mn, Zn, AlElement, plays structure and electronics promoter effect, improves the Structure and stability energy of catalyst; By introducing rare earth element, raising is urgedThe Lattice Oxygen quantity of agent, improves the catalytic performance of catalyst; By introducing the elements such as Cs, Rb, P, B, Al, to catalysisThe adjusting of finishing and Acidity of Aikalinity is carried out in agent, improves the selective and active of catalyst.
The Mo-Bi series catalysts that patent CN1210033A, CN1285238A, CN1294942A, CN1751790A proposeBe applicable to use under higher reaction pressure and high propylene loading condiction, still can keep the feature of very high single-pass yield of acrylonitrile.
Patent CN03151170.8 and CN03151169.4 have introduced in catalyst preparation process, in carrier starting material LudoxAdding 2～25% grain diameter is that the solid silica of 5～100 nanometers improves catalyst performance.
In above all patent documentations, oxide catalyst is loaded on a kind of silica supports, and at such oxygenChange in method for preparing catalyst, all use the source of Ludox as silica, but the influence factor of Ludox is specially aboveIn profit document, all do not mention.
The aluminium content that patent CN1129408A proposes the Ludox adding in catalyst preparation process specifies, can be remarkableGround improves the selective of acrylonitrile, but the content of other components is not had to clearly regulation.
The initial particle that patent CN1744949A proposes by changing silica material distributes and controls the cell size of catalystSystem.
But the yield of prior art acrylonitrile has much room for improvement.
Summary of the invention
One of technical problem to be solved by this invention is that in prior art, the acrylonitrile yield of ammoxidating propylene to prepare acrylonitrile is lowProblem, provides a kind of catalyst for the preparation of acrylonitrile, and this catalyst has the advantages that acrylonitrile yield is high.
Two of technical problem to be solved by this invention is to provide the preparation side of the described catalyst of one of a kind of above-mentioned technical problemMethod.
Three of technical problem to be solved by this invention is to adopt the ammoxidation of propylene of one of above-mentioned technical problem described catalyst rawProduce the method for acrylonitrile.
For one of solving the problems of the technologies described above, the technical solution used in the present invention is as follows: for the preparation of the catalyst of acrylonitrile, withThe silica in Ludox source is carrier, contains the active component that following general formula represents: AaBbCcBidMo13.6Ox；
In formula, A is selected from least one in K, Rb and Cs; B is selected from Ca, Mn, Fe, Co, Ni, Mg, Cr, W, PWith at least one in Nb; C is selected from least one in rare earth element. The span of a is 0.01～2.5; The value model of bEnclose is 1～15; The span of c is 0.01～5; The span of d is 0.01～3; X is for meeting each element in catalystThe oxygen atom sum that the valency that closes is required, 30～70wt% that the consumption of carrier is catalyst weight, wherein in Ludox chlorinity with relativelyThe mol ratio of silicon atom is expressed as 0.027 × 10-2～0.41×10-2。
In technique scheme, the content of carrier is preferably 40～60wt% of catalyst weight.
In technique scheme, in Ludox, chlorinity represents to be preferably 0.027 × 10 with the mol ratio of relative silicon atom-2～0.200×10-2; More preferably 0.027 × 10-2～0.130×10-2; Most preferably 0.048 × 10-2～0.070×10-2。
For solve the problems of the technologies described above two, the technical solution used in the present invention is as follows: the described catalysis of one of above-mentioned technical problemThe preparation method of agent, comprises the following steps:
(a) compound of the A of aequum, B, C and Bi is dissolved, obtain solution I;
(b) aequum is dissolved containing the molybdate of molybdenum, and mix with Ludox, obtain mixed liquor I I;
(c) solution I and II are mixed, 20～90 DEG C of stirrings, the slurry I that acquisition pH is 1～7;
(d) slurry I spray-dried and at 520～660 DEG C calcination activation 0.2～4 hour required catalyst.
In technique scheme, the pH of slurry I is preferably 1～5.
In technique scheme, the temperature that step (c) stirs is preferably 50～80 DEG C.
In technique scheme, the temperature of calcination activation is preferably 550～640 DEG C.
In technique scheme, the time of calcination activation is preferably 0.5～2h.
For solve the problems of the technologies described above three, the technical solution used in the present invention is as follows: a kind of ammoxidating propylene to produce acrylonitrileMethod, it is characterized in that taking propylene, ammonia and air as raw material, raw material and above-mentioned catalyst haptoreaction obtain acrylonitrile.
In technique scheme, preferred feedstock mol ratio propylene/ammonia/air=1:(1.05～1.3): (9.2～9.8).
In technique scheme, preferable reaction temperature is 420～440 DEG C.
In technique scheme, preferred reaction pressure is 0.06～0.14MPa.
In technique scheme, the propylene load WWH=0.06～0.10h of preferred catalyst-1。
Key problem in technology of the present invention is by chlorinity in the Ludox adding in catalyst preparation process being controlled, being reachedImprove the object of acrylonitrile yield.
The activity examination of catalyst of the present invention is to carry out in internal diameter is the fluidized-bed reactor of 38 millimeters. Loaded catalyst400 grams, reaction temperature be 430 DEG C of raw material proportionings (mole) for C3 ＝/NH3/ air=1/1.25/9.7, reaction pressure is0.085Mpa, reaction load is 0.06 hour-1Condition under operate 1000h, acrylonitrile once through yield reaches 83% left and right, getsObtain good effect.
Selective and the once through yield of propylene conversion, acrylonitrile is defined as follows in the present invention:
Below by the drawings and specific embodiments, the present invention is further elaborated:
Brief description of the drawings
Fig. 1 is the chlorinity of Ludox and the relation curve of acrylonitrile yield in embodiment 1～8 and comparative example 1～4.
From Fig. 1, can visually see, when sodium content in Ludox taking the molar ratio computing of relative silicon atom as 0.027 ×10-2～0.41×10-2Time, there is peak value in acrylonitrile yield.
Detailed description of the invention
Comparative example 1
By 111.1 grams of bismuth nitrates, 124.8 grams of manganese nitrates, 517.6 grams of nickel nitrates, 287.6 grams of ferric nitrates, 135.5 grams of magnesium nitrates,After 3.6 grams of potassium hydroxide, 60.7 grams of praseodymium nitrates and 21.4 grams of chromic nitrate heating for dissolving, obtain solution I. By 846.0 grams of molybdic acidsAmmonium dissolves in gauge water, and adds the Ludox (chlorinity 0.001 × 10 that 2500 gram weight concentration are 40%-2), mixedClosing liquid II, solution I and mixed liquor I I are mixed, is 5 at pH, and temperature is to stir under 80 DEG C of conditions, is starchedMaterial I. The slurry of making is carried out in spray dryer to framboid moulding, finally in rotary roasting furnace in 590 DEG C of roastings 2.0Hour, make required catalyst.
Comparative example 2
By 111.1 grams of bismuth nitrates, 124.8 grams of manganese nitrates, 517.6 grams of nickel nitrates, 287.6 grams of ferric nitrates, 135.5 grams of magnesium nitrates,After 3.6 grams of potassium hydroxide, 60.7 grams of praseodymium nitrates and 21.4 grams of chromic nitrate heating for dissolving, obtain solution I. By 846.0 grams of molybdic acidsAmmonium dissolves in gauge water, and adds the Ludox (chlorinity 0.010 × 10 that 2500 gram weight concentration are 40%-2), mixedClosing liquid II, solution I and mixed liquor I I are mixed, is 5 at pH, and temperature is to stir under 80 DEG C of conditions, is starchedMaterial I. The slurry of making is carried out in spray dryer to framboid moulding, finally in rotary roasting furnace in 590 DEG C of roastings 2.0Hour, make required catalyst.
Comparative example 3
By 111.1 grams of bismuth nitrates, 124.8 grams of manganese nitrates, 517.6 grams of nickel nitrates, 287.6 grams of ferric nitrates, 135.5 grams of magnesium nitrates,After 3.6 grams of potassium hydroxide, 60.7 grams of praseodymium nitrates and 21.4 grams of chromic nitrate heating for dissolving, obtain solution I. By 846.0 grams of molybdic acidsAmmonium dissolves in gauge water, and adds the Ludox (chlorinity 0.60 × 10 that 2500 gram weight concentration are 40%-2), mixedLiquid II, mixes solution I and mixed liquor I I, is 5 at pH, and temperature is to stir under 80 DEG C of conditions, obtains slurryI. The slurry of making is carried out in spray dryer to framboid moulding, finally in rotary roasting furnace in 590 DEG C of roastings 2.0Hour, make required catalyst.
Comparative example 4
By 111.1 grams of bismuth nitrates, 124.8 grams of manganese nitrates, 517.6 grams of nickel nitrates, 287.6 grams of ferric nitrates, 135.5 grams of magnesium nitrates,After 3.6 grams of potassium hydroxide, 60.7 grams of praseodymium nitrates and 21.4 grams of chromic nitrate heating for dissolving, obtain solution I. By 846.0 grams of molybdic acidsAmmonium dissolves in gauge water, and adds the Ludox (chlorinity 1.50 × 10 that 2500 gram weight concentration are 40%-2), mixedLiquid II, mixes solution I and mixed liquor I I, is 5 at pH, and temperature is to stir under 80 DEG C of conditions, obtains slurryI. The slurry of making is carried out in spray dryer to framboid moulding, finally in rotary roasting furnace in 590 DEG C of roastings 2.0Hour, make required catalyst.
Embodiment 1
By 111.1 grams of bismuth nitrates, 124.8 grams of manganese nitrates, 517.6 grams of nickel nitrates, 287.6 grams of ferric nitrates, 135.5 grams of magnesium nitrates,After 3.6 grams of potassium hydroxide, 60.7 grams of praseodymium nitrates and 21.4 grams of chromic nitrate heating for dissolving, obtain solution I. By 846.0 grams of molybdic acidsAmmonium dissolves in gauge water, and adds the Ludox (chlorinity 0.015 × 10 that 2500 gram weight concentration are 40%-2), mixedClosing liquid II, solution I and mixed liquor I I are mixed, is 5 at pH, and temperature is to stir under 80 DEG C of conditions, is starchedMaterial I. The slurry of making is carried out in spray dryer to framboid moulding, finally in rotary roasting furnace in 590 DEG C of roastings 2.0Hour, make required catalyst.
Embodiment 2
By 111.1 grams of bismuth nitrates, 124.8 grams of manganese nitrates, 517.6 grams of nickel nitrates, 287.6 grams of ferric nitrates, 135.5 grams of magnesium nitrates,After 3.6 grams of potassium hydroxide, 60.7 grams of praseodymium nitrates and 21.4 grams of chromic nitrate heating for dissolving, obtain solution I. By 846.0 grams of molybdic acidsAmmonium dissolves in gauge water, and adds the Ludox (chlorinity 0.027 × 10 that 2500 gram weight concentration are 40%-2), mixedClosing liquid II, solution I and mixed liquor I I are mixed, is 5 at pH, and temperature is to stir under 80 DEG C of conditions, is starchedMaterial I. The slurry of making is carried out in spray dryer to framboid moulding, finally in rotary roasting furnace in 590 DEG C of roastings 2.0Hour, make required catalyst.
Embodiment 3
By 111.1 grams of bismuth nitrates, 124.8 grams of manganese nitrates, 517.6 grams of nickel nitrates, 287.6 grams of ferric nitrates, 135.5 grams of magnesium nitrates,After 3.6 grams of potassium hydroxide, 60.7 grams of praseodymium nitrates and 21.4 grams of chromic nitrate heating for dissolving, obtain solution I. By 846.0 grams of molybdic acidsAmmonium dissolves in gauge water, and adds the Ludox (chlorinity 0.048 × 10 that 2500 gram weight concentration are 40%-2), mixedClosing liquid II, solution I and mixed liquor I I are mixed, is 5 at pH, and temperature is to stir under 80 DEG C of conditions, is starchedMaterial I. The slurry of making is carried out in spray dryer to framboid moulding, finally in rotary roasting furnace in 590 DEG C of roastings 2.0Hour, make required catalyst.
Embodiment 4
By 111.1 grams of bismuth nitrates, 124.8 grams of manganese nitrates, 517.6 grams of nickel nitrates, 287.6 grams of ferric nitrates, 135.5 grams of magnesium nitrates,After 3.6 grams of potassium hydroxide, 60.7 grams of praseodymium nitrates and 21.4 grams of chromic nitrate heating for dissolving, obtain solution I. By 846.0 grams of molybdic acidsAmmonium dissolves in gauge water, and adds the Ludox (chlorinity 0.059 × 10 that 2500 gram weight concentration are 40%-2), mixedClosing liquid II, solution I and mixed liquor I I are mixed, is 5 at pH, and temperature is to stir under 80 DEG C of conditions, is starchedMaterial I. The slurry of making is carried out in spray dryer to framboid moulding, finally in rotary roasting furnace in 590 DEG C of roastings 2.0Hour, make required catalyst.
Embodiment 5
By 111.1 grams of bismuth nitrates, 124.8 grams of manganese nitrates, 517.6 grams of nickel nitrates, 287.6 grams of ferric nitrates, 135.5 grams of magnesium nitrates,After 3.6 grams of potassium hydroxide, 60.7 grams of praseodymium nitrates and 21.4 grams of chromic nitrate heating for dissolving, obtain solution I. By 846.0 grams of molybdic acidsAmmonium dissolves in gauge water, and adds the Ludox (chlorinity 0.070 × 10 that 2500 gram weight concentration are 40%-2), mixedClosing liquid II, solution I and mixed liquor I I are mixed, is 5 at pH, and temperature is to stir under 80 DEG C of conditions, is starchedMaterial I. The slurry of making is carried out in spray dryer to framboid moulding, finally in rotary roasting furnace in 590 DEG C of roastings 2.0Hour, make required catalyst.
Embodiment 6
By 111.1 grams of bismuth nitrates, 124.8 grams of manganese nitrates, 517.6 grams of nickel nitrates, 287.6 grams of ferric nitrates, 135.5 grams of magnesium nitrates,After 3.6 grams of potassium hydroxide, 60.7 grams of praseodymium nitrates and 21.4 grams of chromic nitrate heating for dissolving, obtain solution I. By 846.0 grams of molybdic acidsAmmonium dissolves in gauge water, and adds the Ludox (chlorinity 0.130 × 10 that 2500 gram weight concentration are 40%-2), mixedClosing liquid II, solution I and mixed liquor I I are mixed, is 5 at pH, and temperature is to stir under 80 DEG C of conditions, is starchedMaterial I. The slurry of making is carried out in spray dryer to framboid moulding, finally in rotary roasting furnace in 590 DEG C of roastings 2.0Hour, make required catalyst.
Embodiment 7
By 111.1 grams of bismuth nitrates, 124.8 grams of manganese nitrates, 517.6 grams of nickel nitrates, 287.6 grams of ferric nitrates, 135.5 grams of magnesium nitrates,After 3.6 grams of potassium hydroxide, 60.7 grams of praseodymium nitrates and 21.4 grams of chromic nitrate heating for dissolving, obtain solution I. By 846.0 grams of molybdic acidsAmmonium dissolves in gauge water, and adds the Ludox (chlorinity 0.200 × 10 that 2500 gram weight concentration are 40%-2), mixedClosing liquid II, solution I and mixed liquor I I are mixed, is 5 at pH, and temperature is to stir under 80 DEG C of conditions, is starchedMaterial I. The slurry of making is carried out in spray dryer to framboid moulding, finally in rotary roasting furnace in 590 DEG C of roastings 2.0Hour, make required catalyst.
Embodiment 8
By 111.1 grams of bismuth nitrates, 124.8 grams of manganese nitrates, 517.6 grams of nickel nitrates, 287.6 grams of ferric nitrates, 135.5 grams of magnesium nitrates,After 3.6 grams of potassium hydroxide, 60.7 grams of praseodymium nitrates and 21.4 grams of chromic nitrate heating for dissolving, obtain solution I. By 846.0 grams of molybdic acidsAmmonium dissolves in gauge water, and adds the Ludox (chlorinity 0.410 × 10 that 2500 gram weight concentration are 40%-2), mixedClosing liquid II, solution I and mixed liquor I I are mixed, is 5 at pH, and temperature is to stir under 80 DEG C of conditions, is starchedMaterial I. The slurry of making is carried out in spray dryer to framboid moulding, finally in rotary roasting furnace in 590 DEG C of roastings 2.0Hour, make required catalyst.
Embodiment 9
By 111.1 grams of bismuth nitrates, 124.8 grams of manganese nitrates, 517.6 grams of nickel nitrates, 287.6 grams of ferric nitrates, 135.5 grams of magnesium nitrates,After 3.6 grams of potassium hydroxide, 60.7 grams of praseodymium nitrates and 21.4 grams of chromic nitrate heating for dissolving, obtain solution I. By 846.0 grams of molybdic acidsAmmonium dissolves in gauge water, and adds the Ludox (chlorinity 0.059 × 10 that 2000 gram weight concentration are 40%-2), mixedClosing liquid II, solution I and mixed liquor I I are mixed, is 5 at pH, and temperature is to stir under 80 DEG C of conditions, is starchedMaterial I. The slurry of making is carried out in spray dryer to framboid moulding, finally in rotary roasting furnace in 590 DEG C of roastings 2.0Hour, make required catalyst.
Embodiment 10
By 111.1 grams of bismuth nitrates, 124.8 grams of manganese nitrates, 517.6 grams of nickel nitrates, 287.6 grams of ferric nitrates, 135.5 grams of magnesium nitrates,,After 3.6 grams of potassium hydroxide, 60.7 grams of praseodymium nitrates and 21.4 grams of chromic nitrate heating for dissolving, obtain solution I. By 846.0 grams of molybdic acidsAmmonium dissolves in gauge water, and adds the Ludox (chlorinity 0.059 × 10 that 1500 gram weight concentration are 40%-2), mixedClosing liquid II, solution I and mixed liquor I I are mixed, is 5 at pH, and temperature is to stir under 80 DEG C of conditions, is starchedMaterial I. The slurry of making is carried out in spray dryer to framboid moulding, finally in rotary roasting furnace in 590 DEG C of roastings 2.0Hour, make required catalyst.
Embodiment 11
By 111.1 grams of bismuth nitrates, 517.6 grams of nickel nitrates, 287.6 grams of ferric nitrates, 135.5 grams of magnesium nitrates, 15.6 grams of hydroxidesAfter potassium and 21.4 grams of chromic nitrate heating for dissolving, obtain solution I. 846.0 grams of ammonium molybdates are dissolved in gauge water, and add 2500Gram weight concentration is 40% Ludox (chlorinity 0.059 × 10-2), obtain mixed liquor I I, solution I and mixed liquor I I are carried outMixing, is 5 at pH, and temperature is to stir under 80 DEG C of conditions, obtains slurry I. By the slurry of making at spray dryerIn carry out framboid moulding, finally in rotary roasting furnace in 590 DEG C of roastings 2.0 hours, make required catalyst.
Embodiment 12
By 111.1 grams of bismuth nitrates, 517.6 grams of nickel nitrates, 287.6 grams of ferric nitrates, 135.5 grams of magnesium nitrates, 15.6 grams of hydroxidesAfter potassium heating for dissolving, obtain solution I. 846.0 grams of ammonium molybdates are dissolved in gauge water, and add 2500 gram weight concentration to be40% Ludox (chlorinity 0.059 × 10-2), obtain mixed liquor I I, solution I and mixed liquor I I are mixed, at pHBe 5, temperature is to stir under 80 DEG C of conditions, obtains slurry I. The slurry of making is carried out in spray dryer to framboidMoulding, finally in rotary roasting furnace in 590 DEG C of roastings 2.0 hours, make required catalyst.
Embodiment 13
By 111.1 grams of bismuth nitrates, 517.6 grams of nickel nitrates, 287.6 grams of ferric nitrates, 271.0 grams of magnesium nitrates, 15.6 grams of hydroxidesAfter potassium heating for dissolving, obtain solution I. 846.0 grams of ammonium molybdates are dissolved in gauge water and are dissolved, and add 2500 gram weight concentrationIt is 40% Ludox (chlorinity 0.059 × 10-2), obtain mixed liquor I I, solution I and mixed liquor I I are mixed,PH is 5, and temperature is to stir under 80 DEG C of conditions, obtains slurry I. The slurry of making is carried out micro-in spray dryerSpherolite moulding, finally in rotary roasting furnace in 590 DEG C of roastings 2.0 hours, make required catalyst.
In embodiment 1～13 and comparative example 1～4, prepared catalyst carries out ammoxidation of propylene under following reaction conditionGenerate the reaction of acrylonitrile, the results are shown in Table 1.
Table 1 catalyst composition and evaluation result
Claims (9)
1. for the preparation of the catalyst of acrylonitrile, the silica of originating taking Ludox, as carrier, contains the work that following general formula representsProperty component: AaBbCcBidMo13.6Ox；
In formula, A is selected from least one in K, Rb and Cs; B is selected from Ca, Mn, Fe, Co, Ni, Mg, Cr, W, PWith at least one in Nb; C is selected from least one in rare earth element; The span of a is 0.01～2.5; The value model of bEnclose is 1～15; The span of c is 0.01～5; The span of d is 0.01～3; X is for meeting each element in catalystThe oxygen atom sum that the valency that closes is required, 30～70wt% that the consumption of carrier is catalyst weight, wherein in Ludox chlorinity with relativelyThe mol ratio of silicon atom is expressed as 0.027 × 10-2～0.41×10-2。
2. catalyst according to claim 1,40～60wt% that the content that it is characterized in that carrier is catalyst weight.
3. catalyst according to claim 1, is characterized in that in Ludox that chlorinity is with the mol ratio table of relative silicon atomBe shown 0.027 × 10-2～0.200×10-2。
4. the preparation method of catalyst claimed in claim 1, comprises the following steps:
(a) compound of the A of aequum, B, C and Bi is dissolved, obtain solution I;
(b) aequum is dissolved containing the molybdate of molybdenum, and mix with Ludox, obtain mixed liquor I I;
(c) solution I and II are mixed, 20～90 DEG C of stirrings, the slurry I that acquisition pH is 1～7;
(d) slurry I spray-dried and at 520～660 DEG C calcination activation 0.2～4 hour required catalyst.
5. the preparation method of catalyst according to claim 4, the pH that it is characterized in that slurry I is 1～5.
6. the preparation method of catalyst according to claim 4, is characterized in that the temperature that step (c) stirs is 50～80 DEG C.
7. the preparation method of catalyst according to claim 4, is characterized in that calcination activation temperature is 550～640 DEG C.
8. the preparation method of catalyst according to claim 4, is characterized in that the calcination activation time is 0.5～2h.
9. the method for ammoxidating propylene to produce acrylonitrile, is characterized in that taking propylene, ammonia and air as raw material, and raw material and right are wantedAsk the haptoreaction of catalyst described in 1 to obtain acrylonitrile.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113332993A (en) * | 2021-06-19 | 2021-09-03 | 营口风光新材料股份有限公司 | Catalyst for preparing acrylonitrile by propylene ammoxidation and preparation method and application thereof |
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