CN114749217A - Honeycomb ceramic catalyst active coating and preparation method thereof - Google Patents
Honeycomb ceramic catalyst active coating and preparation method thereof Download PDFInfo
- Publication number
- CN114749217A CN114749217A CN202210494976.3A CN202210494976A CN114749217A CN 114749217 A CN114749217 A CN 114749217A CN 202210494976 A CN202210494976 A CN 202210494976A CN 114749217 A CN114749217 A CN 114749217A
- Authority
- CN
- China
- Prior art keywords
- powder
- acid
- honeycomb ceramic
- parts
- active coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 68
- 238000000576 coating method Methods 0.000 title claims abstract description 57
- 239000011248 coating agent Substances 0.000 title claims abstract description 55
- 239000003054 catalyst Substances 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 108
- 239000002253 acid Substances 0.000 claims abstract description 98
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims abstract description 72
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 66
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 51
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 150000003839 salts Chemical class 0.000 claims abstract description 30
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 claims abstract description 26
- 239000008367 deionised water Substances 0.000 claims abstract description 16
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims description 49
- 238000002156 mixing Methods 0.000 claims description 42
- 238000000227 grinding Methods 0.000 claims description 35
- 238000003756 stirring Methods 0.000 claims description 35
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 28
- 239000000654 additive Substances 0.000 claims description 28
- 230000000996 additive effect Effects 0.000 claims description 28
- 239000002270 dispersing agent Substances 0.000 claims description 28
- 239000004576 sand Substances 0.000 claims description 28
- 239000011863 silicon-based powder Substances 0.000 claims description 28
- 229910052845 zircon Inorganic materials 0.000 claims description 28
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 28
- 238000001035 drying Methods 0.000 claims description 24
- 239000006255 coating slurry Substances 0.000 claims description 22
- 238000001354 calcination Methods 0.000 claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 150000004965 peroxy acids Chemical class 0.000 claims description 12
- 239000004925 Acrylic resin Substances 0.000 claims description 7
- 229920000178 Acrylic resin Polymers 0.000 claims description 7
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-L Phosphate ion(2-) Chemical compound OP([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-L 0.000 claims description 7
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 7
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 7
- 229910000397 disodium phosphate Inorganic materials 0.000 claims description 7
- 235000019800 disodium phosphate Nutrition 0.000 claims description 7
- 239000000839 emulsion Substances 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 239000011964 heteropoly acid Substances 0.000 claims description 7
- 229910000403 monosodium phosphate Inorganic materials 0.000 claims description 7
- 235000019799 monosodium phosphate Nutrition 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- PNSWKXISZRTMSD-UHFFFAOYSA-K pentasodium;phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[O-]P([O-])([O-])=O PNSWKXISZRTMSD-UHFFFAOYSA-K 0.000 claims description 7
- 229910000343 potassium bisulfate Inorganic materials 0.000 claims description 7
- 238000002791 soaking Methods 0.000 claims description 7
- 239000001509 sodium citrate Substances 0.000 claims description 7
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 7
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 claims description 7
- DHCDFWKWKRSZHF-UHFFFAOYSA-N sulfurothioic S-acid Chemical compound OS(O)(=O)=S DHCDFWKWKRSZHF-UHFFFAOYSA-N 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 7
- YWYZEGXAUVWDED-UHFFFAOYSA-N triammonium citrate Chemical compound [NH4+].[NH4+].[NH4+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O YWYZEGXAUVWDED-UHFFFAOYSA-N 0.000 claims description 7
- 239000001393 triammonium citrate Substances 0.000 claims description 7
- 235000011046 triammonium citrate Nutrition 0.000 claims description 7
- 239000012498 ultrapure water Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- JTNCEQNHURODLX-UHFFFAOYSA-N 2-phenylethanimidamide Chemical compound NC(=N)CC1=CC=CC=C1 JTNCEQNHURODLX-UHFFFAOYSA-N 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- XMHIUKTWLZUKEX-UHFFFAOYSA-N hexacosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCC(O)=O XMHIUKTWLZUKEX-UHFFFAOYSA-N 0.000 claims 2
- 239000002002 slurry Substances 0.000 abstract description 14
- 238000005336 cracking Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 abstract description 2
- 230000003301 hydrolyzing effect Effects 0.000 abstract 1
- -1 isopolyacid Substances 0.000 description 6
- CHKVPAROMQMJNQ-UHFFFAOYSA-M potassium bisulfate Chemical compound [K+].OS([O-])(=O)=O CHKVPAROMQMJNQ-UHFFFAOYSA-M 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/12—Silica and alumina
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
Abstract
The invention belongs to the technical field of catalysts, in particular to an active coating of a honeycomb ceramic catalyst and a preparation method thereof, aiming at the problems that the viscosity of the existing slurry is still low and a large number of cracks exist, the following scheme is provided, the internal materials of the active coating comprise 1 to 3 parts of modified alumina, 0.5 to 1 part of glycerol, 1 to 2 parts of modified aluminum salt powder, 5 to 7 parts of pseudo-boehmite, 1 to 3 parts of oxyacid, 1 to 3 parts of acid salt, 2 to 5 parts of ethanol and 15 to 20 parts of deionized water, the prepared slurry has higher viscosity, the coating and the honeycomb ceramic have stronger bonding force, the pseudo-boehmite can be fully hydrolyzed by utilizing hydroxyl and hydrolytic components, so that the viscosity of the slurry is improved, compared with the comparative example in the background technology, the viscosity of the slurry is improved by twenty to thirty percent, and the coating has no cracking phenomenon.
Description
Technical Field
The invention relates to the technical field of catalysts, in particular to an active coating of a honeycomb ceramic catalyst and a preparation method thereof.
Background
The patent with the application number of CN201210549202.2 discloses an active coating of a honeycomb ceramic catalyst and a preparation method thereof, and the active coating of the alumina prepared by the method has the advantages of high load capacity, uniform coating and strong bonding force between the coating and a honeycomb ceramic carrier. The method increases the viscosity of the slurry by utilizing the action of hydroxyl of a glycerol structural unit and hydroxyl of aluminum oxide in the slurry and the hydrolysis of nitric acid on the pseudo-boehmite, and is favorable for improving the combination degree between the coating slurry and the honeycomb ceramic carrier. The honeycomb ceramic carrier alumina coating obtained after roasting has uniform appearance and no obvious cracking phenomenon. The invention has high load, and compared with the prior art, the preparation method is simple, the production cost is low, the process control is easy to realize, and the invention is beneficial to industrial production.
However, the honeycomb ceramic catalyst active coating and the preparation method thereof have some problems, for example, the prepared slurry has low viscosity, so that the strength of the connection between the slurry and the honeycomb ceramic is weak, the slurry is easy to flow, so that the slurry is difficult to uniformly distribute on the honeycomb ceramic, and the prepared coating still has a large amount of fine cracks and has poor protection effect.
Disclosure of Invention
Based on the problems of low slurry viscosity and a large number of cracks existing in the prior art, the invention provides a honeycomb ceramic catalyst active coating and a preparation method thereof.
The invention provides a honeycomb ceramic catalyst active coating, wherein the internal material of the honeycomb ceramic catalyst active coating comprises 1-3 parts of modified alumina, 0.5-1 part of glycerol, 1-2 parts of modified aluminum salt powder, 5-7 parts of pseudo-boehmite, 1-3 parts of oxyacid, 1-3 parts of acid salt, 2-5 parts of ethanol and 15-20 parts of deionized water, the modified alumina is prepared from alumina fine powder, a dispersing agent and an additive, the modified aluminum salt powder is prepared from aluminum salt, silicon powder and zircon sand, the oxyacid is one of normal acid, ortho acid, meta-acid, subacid, hypo-acid, peracid, continuous acid, peroxy acid, isopolyacid, heteropolyacid acid, certain substituted acid and certain substituted acid, and the acid salt is one of sodium bicarbonate, potassium hydrogen sulfate, sodium dihydrogen phosphate and hydrogen phosphate.
Preferably, the ratio of the alumina fine powder, the dispersant and the additive in the modified alumina is controlled to be 7-9: 0.5-1.5.
Preferably, the dispersing agent is a mixture of triammonium citrate powder, acrylic resin emulsion and ammonia water, and the additive is a mixture of Glan-Hamming salt, pentasodium phosphate and sodium citrate.
Preferably, the preparation method of the modified alumina comprises the following steps: adding the fine alumina powder into high-purity water, uniformly stirring, adding a dispersing agent and an additive, uniformly stirring to form a mixture, pouring the mixture into a stirring mill, repeatedly grinding, filtering, separating coarse-fine five-stage powder by using a centrifugal machine, drying, repeatedly grinding coarse first three-stage powder until the particle size of the powder is consistent with that of the fine two-stage powder, mixing, and grinding again to obtain the modified alumina.
Preferably, the ratio of aluminum salt, silicon powder and zircon sand in the modified aluminum salt powder is controlled to be 8-9: 0.5-1, and the aluminum salt, the silicon powder and the zircon sand are obtained by grinding.
Preferably, the method for preparing the modified aluminum salt powder comprises: mixing aluminum salt, silicon powder and zircon sand, adding the mixture into the mixture at 650-825 ℃ for calcination, and grinding the mixture after the calcination until the powder passes through a 120-200-mesh sieve to obtain the modified aluminum salt powder.
Preferably, the pseudoboehmite is selected from a powdery dry product.
Preferably, the certain substituted acid is one of oxygen, the certain substituted acid is thiosulfuric acid, the certain substituted acid is one of substituted hydroxyl, and the certain substituted acid is halosulfonic acid.
A preparation method of a honeycomb ceramic catalyst active coating comprises the following steps:
s1: adding glycerol, ethanol and deionized water into a reaction kettle for mixing, controlling the mixing temperature to be 35-45 ℃ and the rotating speed to be 100-200 r/min, adding modified alumina, modified aluminum salt powder and pseudo-boehmite after uniformly mixing, and continuously stirring to obtain a suspension;
s2: then adding oxygen acid and acid salt for mixing, increasing the rotating speed to 400 r/min-500 r/min, and uniformly stirring to obtain coating slurry;
s3: soaking the honeycomb ceramic in the coating slurry for 10 minutes;
s4: and (3) cleaning redundant coating slurry on the surface of the honeycomb ceramic, and finally performing drying and roasting treatment to obtain the active coating of the honeycomb ceramic catalyst.
Preferably, in S4, the temperature of the baking and roasting is controlled to be 200-450 ℃, and the time of the baking and roasting is controlled to be 4-8 hours.
The invention has the beneficial effects that:
the slurry prepared from the modified aluminum oxide, the glycerol, the modified aluminum salt powder, the pseudo-boehmite, the oxyacid, the acid salt, the ethanol and the deionized water has higher viscosity, so that the coating and the honeycomb ceramic have stronger bonding force, and the pseudo-boehmite can be sufficiently hydrolyzed by utilizing the hydroxyl and the hydrolysis components, so that the viscosity of the slurry is improved, and compared with a comparative example in the background art, the slurry is improved by twenty to thirty percent, and the coating does not have a cracking phenomenon.
Drawings
Fig. 1 is a flow chart of the present invention.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Referring to FIG. 1, the first embodiment
The embodiment provides an active coating of a honeycomb ceramic catalyst, wherein the internal material of the active coating of the honeycomb ceramic catalyst comprises 3 parts of modified alumina, 0.5 part of glycerol, 1.9 parts of modified aluminum salt powder, 6.5 parts of pseudo-boehmite, 3 parts of oxyacid, 2.5 parts of acid salt, 4 parts of ethanol and 18 parts of deionized water, the modified alumina is prepared from alumina fine powder, a dispersing agent and an additive, the modified aluminum salt powder is prepared from aluminum salt, silicon powder and zircon sand, the oxyacid is one of normal acid, ortho acid, meta acid, subacid, peracid, monoacid, peroxonic acid, isopolyacid, heteropolyacid, certain substituted acid and certain substituted acid, the acid salt is one of sodium bicarbonate, potassium hydrogen sulfate, sodium dihydrogen phosphate and hydrogen phosphate, the proportion of the alumina fine powder, the dispersing agent and the additive in the modified alumina is controlled to be 7-9: 0.5-1.5, the dispersant is a mixture of triammonium citrate powder, acrylic resin emulsion and ammonia water, the additive is a mixture of Glan Hamming salt, pentasodium phosphate and sodium citrate, and the preparation method of the modified alumina comprises the following steps: adding fine alumina powder into high-purity water, uniformly stirring, adding a dispersing agent and an additive, uniformly stirring to form a mixture, pouring the mixture into a stirring mill, repeatedly grinding, filtering, separating coarse-fine five-stage powder by using a centrifugal machine, drying, repeatedly grinding coarse first three-stage powder until the particle size of the powder is consistent with that of the fine two-stage powder, mixing, and grinding again to obtain modified alumina, wherein the ratio of aluminum salt, silicon powder and zircon sand in the modified aluminum salt powder is controlled to be 8-9: 0.5-1, and the aluminum salt, the silicon powder and the zircon sand are all obtained by grinding, and the preparation method of the modified aluminum salt powder comprises the following steps: mixing aluminum salt, silicon powder and zircon sand, adding the mixture into the mixture at the temperature of 650-825 ℃ for calcination, grinding the mixture after the calcination is finished until the powder passes through a 120-200-mesh sieve to obtain modified aluminum salt powder, selecting powdery dry pseudo-boehmite, wherein certain substituted acid is one of oxygen substitutes, certain substituted acid is thiosulfuric acid, certain substituted acid is one of substituted hydroxyl groups, and certain substituted acid is halosulfonic acid.
A preparation method of a honeycomb ceramic catalyst active coating comprises the following steps:
s1: adding glycerol, ethanol and deionized water into a reaction kettle for mixing, controlling the mixing temperature to be 35-45 ℃ and the rotating speed to be 100-200 r/min, adding modified alumina, modified aluminum salt powder and pseudo-boehmite after uniformly mixing, and continuously stirring to obtain a suspension;
s2: then adding oxygen acid and acid salt for mixing, increasing the rotating speed to 400 r/min-500 r/min, and uniformly stirring to obtain coating slurry;
s3: soaking the honeycomb ceramic in the coating slurry for 10 minutes;
s4: and (3) cleaning redundant coating slurry on the surface of the honeycomb ceramic, and finally performing drying roasting treatment, wherein the drying roasting temperature is controlled to be 200-450 ℃, and the drying roasting time is controlled to be 4-8 hours, so as to obtain the active coating of the honeycomb ceramic catalyst.
Referring to FIG. 1, example II
The embodiment provides a honeycomb ceramic catalyst active coating, wherein the internal material of the honeycomb ceramic catalyst active coating comprises 2 parts of modified alumina, 0.8 part of glycerol, 1.8 parts of modified aluminum salt powder, 6 parts of pseudo-boehmite, 2.5 parts of oxyacid, 2 parts of acid salt, 4 parts of ethanol and 17 parts of deionized water, the modified alumina is prepared from alumina fine powder, a dispersing agent and an additive, the modified aluminum salt powder is prepared from aluminum salt, silicon powder and zircon sand, the oxyacid is one of orthoacid, meta-acid, subacid, peracid, continuous acid, peroxy acid, isopolyacid, heteropoly acid, certain substituted acid and certain substituted acid, the acid salt is one of sodium bicarbonate, potassium hydrogen sulfate, sodium dihydrogen phosphate and hydrogen phosphate, the proportion of the alumina fine powder, the dispersing agent and the additive in the modified alumina is controlled to be 7-9: 0.5-1.5, the dispersant is a mixture of triammonium citrate powder, acrylic resin emulsion and ammonia water, the additive is a mixture of Glan Hamming salt, pentasodium phosphate and sodium citrate, and the preparation method of the modified alumina comprises the following steps: adding fine alumina powder into high-purity water, uniformly stirring, adding a dispersing agent and an additive, uniformly stirring to form a mixture, pouring the mixture into a stirring mill, repeatedly grinding, filtering, separating coarse-fine five-stage powder by using a centrifugal machine, drying, repeatedly grinding coarse first three-stage powder until the particle size of the powder is consistent with that of the fine two-stage powder, mixing, and grinding again to obtain modified alumina, wherein the ratio of aluminum salt, silicon powder and zircon sand in the modified aluminum salt powder is controlled to be 8-9: 0.5-1, and the aluminum salt, the silicon powder and the zircon sand are all obtained by grinding, and the preparation method of the modified aluminum salt powder comprises the following steps: mixing aluminum salt, silicon powder and zircon sand, adding the mixture into the mixture at the temperature of 650-825 ℃ for calcination, grinding the mixture after the calcination is finished until the powder passes through a 120-200-mesh sieve to obtain modified aluminum salt powder, selecting powdery dry pseudo-boehmite, wherein certain substituted acid is one of oxygen substitutes, certain substituted acid is thiosulfuric acid, certain substituted acid is one of substituted hydroxyl groups, and certain substituted acid is halosulfonic acid.
A preparation method of a honeycomb ceramic catalyst active coating comprises the following steps:
s1: adding glycerol, ethanol and deionized water into a reaction kettle for mixing, controlling the mixing temperature to be 35-45 ℃ and the rotating speed to be 100-200 r/min, adding modified alumina, modified aluminum salt powder and pseudo-boehmite after uniformly mixing, and continuously stirring to obtain a suspension;
s2: then adding oxyacid and acid salt for mixing, increasing the rotating speed to 400 r/min-500 r/min, and uniformly stirring to obtain coating slurry;
s3: soaking the honeycomb ceramics in the coating slurry for 10 minutes;
s4: and (3) cleaning redundant coating slurry on the surface of the honeycomb ceramic, and finally performing drying and roasting treatment, wherein the drying and roasting temperature is controlled to be 200-450 ℃, and the drying and roasting time is controlled to be 4-8 hours, so as to obtain the active coating of the honeycomb ceramic catalyst.
Referring to FIG. 1, example III
The embodiment provides a honeycomb ceramic catalyst active coating, wherein the internal material of the honeycomb ceramic catalyst active coating comprises 2 parts of modified alumina, 0.8 part of glycerol, 1.7 parts of modified aluminum salt powder, 6 parts of pseudo-boehmite, 1.5 parts of oxyacid, 2 parts of acid salt, 4 parts of ethanol and 18 parts of deionized water, the modified alumina is prepared from alumina fine powder, a dispersing agent and an additive, the modified aluminum salt powder is prepared from aluminum salt, silicon powder and zircon sand, the oxyacid is one of orthoacid, meta-acid, subacid, peracid, continuous acid, peroxy acid, isopolyacid, heteropoly acid, certain substituted acid and certain substituted acid, the acid salt is one of sodium bicarbonate, potassium hydrogen sulfate, sodium dihydrogen phosphate and hydrogen phosphate, the proportion of the alumina fine powder, the dispersing agent and the additive in the modified alumina is controlled to be 7-9: 0.5-1.5, the dispersant is a mixture of triammonium citrate powder, acrylic resin emulsion and ammonia water, the additive is a mixture of Glan-Hamming salt, pentasodium phosphate and sodium citrate, and the preparation method of the modified aluminum oxide comprises the following steps: adding fine alumina powder into high-purity water, uniformly stirring, adding a dispersing agent and an additive, uniformly stirring to form a mixture, pouring the mixture into a stirring mill, repeatedly grinding, filtering, separating coarse-fine five-stage powder by using a centrifugal machine, drying, repeatedly grinding coarse first three-stage powder until the particle size of the powder is consistent with that of the fine two-stage powder, mixing, and grinding again to obtain modified alumina, wherein the ratio of aluminum salt, silicon powder and zircon sand in the modified aluminum salt powder is controlled to be 8-9: 0.5-1, and the aluminum salt, the silicon powder and the zircon sand are all obtained by grinding, and the preparation method of the modified aluminum salt powder comprises the following steps: mixing aluminum salt, silicon powder and zircon sand, adding the mixture into the mixture at the temperature of 650-825 ℃ for calcination, grinding the mixture after the calcination is finished until the powder passes through a 120-200-mesh sieve to obtain modified aluminum salt powder, selecting powdery dry pseudo-boehmite, wherein certain substituted acid is one of oxygen substitutes, certain substituted acid is thiosulfuric acid, certain substituted acid is one of substituted hydroxyl groups, and certain substituted acid is halosulfonic acid.
A preparation method of a honeycomb ceramic catalyst active coating comprises the following steps:
s1: adding glycerol, ethanol and deionized water into a reaction kettle for mixing, controlling the mixing temperature to be 35-45 ℃ and the rotating speed to be 100-200 r/min, adding modified alumina, modified aluminum salt powder and pseudo-boehmite after uniform mixing, and continuously stirring to obtain a suspension;
s2: then adding oxygen acid and acid salt for mixing, increasing the rotating speed to 400 r/min-500 r/min, and uniformly stirring to obtain coating slurry;
s3: soaking the honeycomb ceramics in the coating slurry for 10 minutes;
s4: and (3) cleaning redundant coating slurry on the surface of the honeycomb ceramic, and finally performing drying and roasting treatment, wherein the drying and roasting temperature is controlled to be 200-450 ℃, and the drying and roasting time is controlled to be 4-8 hours, so as to obtain the active coating of the honeycomb ceramic catalyst.
Referring to FIG. 1, example No. four
The embodiment provides a honeycomb ceramic catalyst active coating, wherein the internal material of the honeycomb ceramic catalyst active coating comprises 1.5 parts of modified alumina, 0.8 part of glycerol, 1.5 parts of modified aluminum salt powder, 7 parts of pseudo-boehmite, 1.5 parts of oxyacid, 1.5 parts of acid salt, 2.5 parts of ethanol and 18 parts of deionized water, the modified alumina is prepared from alumina fine powder, a dispersing agent and an additive, the modified aluminum salt powder is prepared from aluminum salt, silicon powder and zircon sand, the oxyacid is one of orthoacid, meta-acid, subacid, peracid, orthoacid, peroxoic acid, isopolyacid, heteropolyacid, a certain substituted acid and a certain substituted acid, the acid salt is one of sodium bicarbonate, potassium bisulfate, sodium dihydrogen phosphate and hydrogen phosphate, the proportion of the alumina fine powder, the dispersing agent and the additive in the modified alumina is controlled to be 7-9: 0.5-1.5, the dispersant is a mixture of triammonium citrate powder, acrylic resin emulsion and ammonia water, the additive is a mixture of Glan Hamming salt, pentasodium phosphate and sodium citrate, and the preparation method of the modified alumina comprises the following steps: adding fine alumina powder into high-purity water, uniformly stirring, adding a dispersing agent and an additive, uniformly stirring to form a mixture, pouring the mixture into a stirring mill, repeatedly grinding, filtering, separating coarse-fine five-stage powder by using a centrifugal machine, drying, repeatedly grinding coarse first three-stage powder until the particle size of the powder is consistent with that of the fine two-stage powder, mixing, and grinding again to obtain modified alumina, wherein the ratio of aluminum salt, silicon powder and zircon sand in the modified aluminum salt powder is controlled to be 8-9: 0.5-1, and the aluminum salt, the silicon powder and the zircon sand are all obtained by grinding, and the preparation method of the modified aluminum salt powder comprises the following steps: mixing aluminum salt, silicon powder and zircon sand, adding the mixture into the mixture at the temperature of 650-825 ℃ for calcination, grinding the mixture after the calcination is finished until the powder passes through a 120-200-mesh sieve to obtain modified aluminum salt powder, selecting powdery dry pseudo-boehmite, wherein certain substituted acid is one of oxygen substitutes, certain substituted acid is thiosulfuric acid, certain substituted acid is one of substituted hydroxyl groups, and certain substituted acid is halosulfonic acid.
A preparation method of a honeycomb ceramic catalyst active coating comprises the following steps:
s1: adding glycerol, ethanol and deionized water into a reaction kettle for mixing, controlling the mixing temperature to be 35-45 ℃ and the rotating speed to be 100-200 r/min, adding modified alumina, modified aluminum salt powder and pseudo-boehmite after uniformly mixing, and continuously stirring to obtain a suspension;
s2: then adding oxygen acid and acid salt for mixing, increasing the rotating speed to 400 r/min-500 r/min, and uniformly stirring to obtain coating slurry;
s3: soaking the honeycomb ceramic in the coating slurry for 10 minutes;
s4: and (3) cleaning redundant coating slurry on the surface of the honeycomb ceramic, and finally performing drying roasting treatment, wherein the drying roasting temperature is controlled to be 200-450 ℃, and the drying roasting time is controlled to be 4-8 hours, so as to obtain the active coating of the honeycomb ceramic catalyst.
Referring to FIG. 1, example V
The embodiment provides a honeycomb ceramic catalyst active coating, the internal material of the honeycomb ceramic catalyst active coating comprises 1 part of modified alumina, 1 part of glycerol, 1 part of modified aluminum salt powder, 7 parts of pseudo-boehmite, 1 part of oxyacid, 1 part of acid salt, 2 parts of ethanol and 20 parts of deionized water, the modified alumina is prepared from alumina fine powder, a dispersing agent and an additive, the modified aluminum salt powder is prepared from aluminum salt, silicon powder and zircon sand, the oxyacid is one of orthoacid, meta-acid, subacid, peracid, monoacid, peracid, peroxyacid, isopolyacid, heteropoly acid, certain substituted acid and certain substituted acid, the acid salt is one of sodium bicarbonate, potassium hydrogen sulfate, sodium dihydrogen phosphate and hydrogen phosphate, the proportion of the alumina fine powder, the dispersing agent and the additive in the modified alumina is controlled to be 7-9: 0.5-1.5, the dispersant is a mixture of triammonium citrate powder, acrylic resin emulsion and ammonia water, the additive is a mixture of Glan Hamming salt, pentasodium phosphate and sodium citrate, and the preparation method of the modified alumina comprises the following steps: adding fine alumina powder into high-purity water, uniformly stirring, adding a dispersing agent and an additive, uniformly stirring to form a mixture, pouring the mixture into a stirring mill, repeatedly grinding, filtering, separating coarse-fine five-stage powder by using a centrifugal machine, drying, repeatedly grinding coarse first three-stage powder until the particle size of the powder is consistent with that of the fine two-stage powder, mixing, and grinding again to obtain modified alumina, wherein the ratio of aluminum salt, silicon powder and zircon sand in the modified aluminum salt powder is controlled to be 8-9: 0.5-1, and the aluminum salt, the silicon powder and the zircon sand are all obtained by grinding, and the preparation method of the modified aluminum salt powder comprises the following steps: mixing aluminum salt, silicon powder and zircon sand, adding the mixture into the mixture at the temperature of 650-825 ℃ for calcination, grinding the mixture after the calcination is finished until the powder passes through a 120-200-mesh sieve to obtain modified aluminum salt powder, selecting powdery dry pseudo-boehmite, wherein certain substituted acid is one of oxygen substitutes, certain substituted acid is thiosulfuric acid, certain substituted acid is one of substituted hydroxyl groups, and certain substituted acid is halosulfonic acid.
A preparation method of a honeycomb ceramic catalyst active coating comprises the following steps:
s1: adding glycerol, ethanol and deionized water into a reaction kettle for mixing, controlling the mixing temperature to be 35-45 ℃ and the rotating speed to be 100-200 r/min, adding modified alumina, modified aluminum salt powder and pseudo-boehmite after uniformly mixing, and continuously stirring to obtain a suspension;
s2: then adding oxygen acid and acid salt for mixing, increasing the rotating speed to 400 r/min-500 r/min, and uniformly stirring to obtain coating slurry;
s3: soaking the honeycomb ceramic in the coating slurry for 10 minutes;
s4: and (3) cleaning redundant coating slurry on the surface of the honeycomb ceramic, and finally performing drying roasting treatment, wherein the drying roasting temperature is controlled to be 200-450 ℃, and the drying roasting time is controlled to be 4-8 hours, so as to obtain the active coating of the honeycomb ceramic catalyst.
Comparing the conventional honeycomb ceramic catalyst active coating with the honeycomb ceramic catalyst active coatings prepared in examples one to five, the honeycomb ceramic catalyst active coatings prepared in examples one to five are as follows:
as can be seen from the above table, the viscosity of the active coating of the honeycomb ceramic catalyst prepared by the invention is obviously improved, the number of cracks is obviously reduced, and the second embodiment is the best embodiment.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The honeycomb ceramic catalyst active coating is characterized in that the internal material of the honeycomb ceramic catalyst active coating comprises 1 to 3 parts of modified alumina, 0.5 to 1 part of glycerol, 1 to 2 parts of modified aluminum salt powder, 5 to 7 parts of pseudo-boehmite, 1 to 3 parts of oxyacid, 1 to 3 parts of acid salt, 2 to 5 parts of ethanol and 15 to 20 parts of deionized water, the modified alumina is prepared from alumina fine powder, a dispersant and an additive, the modified aluminum salt powder is prepared from aluminum salt, silicon powder and zircon sand, the oxyacid is one of orthoacid, meta acid, subacid, peracid, cerotic acid, peroxoic acid, isopoly acid, heteropoly acid, certain substituted acid and certain substituted acid, the acid salt is one of sodium bicarbonate, potassium bisulfate, sodium dihydrogen phosphate and hydrogen phosphate.
2. The honeycomb ceramic catalyst active coating as claimed in claim 1, wherein the ratio of the alumina fine powder, the dispersant and the additive in the modified alumina is controlled to be 7-9: 0.5-1.5.
3. The honeycomb ceramic catalyst active coating of claim 1, wherein the dispersant is a mixture of triammonium citrate powder, acrylic resin emulsion and ammonia water, and the additive is a mixture of Glan Hamming salt, pentasodium phosphate and sodium citrate.
4. The honeycomb ceramic catalyst active coating according to claim 1, wherein the preparation method of the modified alumina comprises the following steps: adding the fine aluminum oxide powder into high-purity water, uniformly stirring, adding a dispersing agent and an additive, uniformly stirring to form a mixture, pouring the mixture into a stirring mill, repeatedly grinding, filtering, separating coarse-fine five-stage powder by using a centrifugal machine, drying, repeatedly grinding coarse first three-stage powder until the particle size of the powder is consistent with that of the fine two-stage powder, mixing, and grinding again to obtain the modified aluminum oxide.
5. The honeycomb ceramic catalyst active coating according to claim 1, wherein the ratio of aluminum salt, silicon powder and zircon sand in the modified aluminum salt powder is controlled to be 8-9: 0.5-1, and the aluminum salt, the silicon powder and the zircon sand are obtained by grinding.
6. The honeycomb ceramic catalyst active coating according to claim 1, wherein the modified aluminum salt powder is prepared by the following method: mixing aluminum salt, silicon powder and zircon sand, adding the mixture into the mixture at 650-825 ℃ for calcination, and grinding the mixture after the calcination until the powder passes through a 120-200-mesh sieve to obtain the modified aluminum salt powder.
7. The honeycomb ceramic catalyst active coating of claim 1, wherein the pseudoboehmite is selected from a dry powder.
8. The honeycomb ceramic catalyst active coating according to claim 1, wherein the certain substituted acid is one of oxygen, the certain substituted acid is thiosulfuric acid, the certain substituted acid is one of substituted hydroxyl groups, and the certain substituted acid is halosulfonic acid.
9. A preparation method of a honeycomb ceramic catalyst active coating is characterized by comprising the following steps:
s1: adding glycerol, ethanol and deionized water into a reaction kettle for mixing, controlling the mixing temperature to be 35-45 ℃ and the rotating speed to be 100-200 r/min, adding modified alumina, modified aluminum salt powder and pseudo-boehmite after uniformly mixing, and continuously stirring to obtain a suspension;
s2: then adding oxygen acid and acid salt for mixing, increasing the rotating speed to 400 r/min-500 r/min, and uniformly stirring to obtain coating slurry;
s3: soaking the honeycomb ceramic in the coating slurry for 10 minutes;
s4: and (3) cleaning redundant coating slurry on the surface of the honeycomb ceramic, and finally performing drying and roasting treatment to obtain the active coating of the honeycomb ceramic catalyst.
10. The method for preparing the honeycomb ceramic catalyst active coating according to the claim 9, wherein in S4, the temperature of the baking and roasting is controlled to be 200-450 ℃, and the time of the baking and roasting is controlled to be 4-8 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210494976.3A CN114749217A (en) | 2022-05-07 | 2022-05-07 | Honeycomb ceramic catalyst active coating and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210494976.3A CN114749217A (en) | 2022-05-07 | 2022-05-07 | Honeycomb ceramic catalyst active coating and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114749217A true CN114749217A (en) | 2022-07-15 |
Family
ID=82335959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210494976.3A Pending CN114749217A (en) | 2022-05-07 | 2022-05-07 | Honeycomb ceramic catalyst active coating and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114749217A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101653724A (en) * | 2009-09-10 | 2010-02-24 | 上海纳米技术及应用国家工程研究中心有限公司 | Ceramics catalyst surface active coating and its preparation method |
| CN101712838A (en) * | 2009-12-18 | 2010-05-26 | 威海新元化工有限公司 | Water-soluble low surface energy paint and preparation method thereof |
| CN102989524A (en) * | 2012-12-18 | 2013-03-27 | 上海纳米技术及应用国家工程研究中心有限公司 | Honeycomb ceramic catalyst active coating and preparation method thereof |
| CN105273518A (en) * | 2014-07-24 | 2016-01-27 | 中国科学院理化技术研究所 | Preparation method of waterproof long-acting antifogging and antifrosting polymer coating with self-repairing performance |
| CN105289676A (en) * | 2015-10-27 | 2016-02-03 | 展宗城 | Foam-like low-temperature SCR catalyst and preparation method thereof |
| CN105925162A (en) * | 2016-06-29 | 2016-09-07 | 王乔 | Virtual-reality intelligent helmet coating |
| CN107556877A (en) * | 2017-10-09 | 2018-01-09 | 江苏海晟涂料有限公司 | A kind of multifunctional high-temperature ceramic post sintering coating and preparation method thereof |
| CN107854725A (en) * | 2017-12-11 | 2018-03-30 | 施海燕 | Deposition forms mixed solution of coating and preparation method thereof, applies layer manufacturing method thereof |
| CN107954693A (en) * | 2017-11-24 | 2018-04-24 | 桂林市雁山区青少年活动中心 | A kind of refractory ceramics metallic composite |
| CN109107568A (en) * | 2018-10-12 | 2019-01-01 | 中汽研（天津）汽车工程研究院有限公司 | A kind of coating slurry and pulping process being used to prepare ceramic honeycomb catalyst |
| CN110093049A (en) * | 2018-01-28 | 2019-08-06 | 吴军 | A kind of chemical pump wear-resistant paint and preparation method thereof |
-
2022
- 2022-05-07 CN CN202210494976.3A patent/CN114749217A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101653724A (en) * | 2009-09-10 | 2010-02-24 | 上海纳米技术及应用国家工程研究中心有限公司 | Ceramics catalyst surface active coating and its preparation method |
| CN101712838A (en) * | 2009-12-18 | 2010-05-26 | 威海新元化工有限公司 | Water-soluble low surface energy paint and preparation method thereof |
| CN102989524A (en) * | 2012-12-18 | 2013-03-27 | 上海纳米技术及应用国家工程研究中心有限公司 | Honeycomb ceramic catalyst active coating and preparation method thereof |
| CN105273518A (en) * | 2014-07-24 | 2016-01-27 | 中国科学院理化技术研究所 | Preparation method of waterproof long-acting antifogging and antifrosting polymer coating with self-repairing performance |
| CN105289676A (en) * | 2015-10-27 | 2016-02-03 | 展宗城 | Foam-like low-temperature SCR catalyst and preparation method thereof |
| CN105925162A (en) * | 2016-06-29 | 2016-09-07 | 王乔 | Virtual-reality intelligent helmet coating |
| CN107556877A (en) * | 2017-10-09 | 2018-01-09 | 江苏海晟涂料有限公司 | A kind of multifunctional high-temperature ceramic post sintering coating and preparation method thereof |
| CN107954693A (en) * | 2017-11-24 | 2018-04-24 | 桂林市雁山区青少年活动中心 | A kind of refractory ceramics metallic composite |
| CN107854725A (en) * | 2017-12-11 | 2018-03-30 | 施海燕 | Deposition forms mixed solution of coating and preparation method thereof, applies layer manufacturing method thereof |
| CN110093049A (en) * | 2018-01-28 | 2019-08-06 | 吴军 | A kind of chemical pump wear-resistant paint and preparation method thereof |
| CN109107568A (en) * | 2018-10-12 | 2019-01-01 | 中汽研（天津）汽车工程研究院有限公司 | A kind of coating slurry and pulping process being used to prepare ceramic honeycomb catalyst |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2022522804A (en) | Silicon nitride, ceramic slurry and preparation method | |
| JP5647359B2 (en) | Method for preparing α-alumina abrasive | |
| CN108002828B (en) | YSZ ceramic granulation powder for plasma spraying and preparation method thereof | |
| CN112028637A (en) | Preparation method of high-reliability long-life silicon nitride ceramic ball for aviation bearing | |
| CN110668813A (en) | Preparation method of nano zirconia granulated powder | |
| CN112209419A (en) | Preparation method of spherical yttrium oxide powder for high apparent density thermal spraying | |
| CN114132959B (en) | Core-shell structure B 4 C@TiO 2 Composite powder and preparation method thereof | |
| CN115838290A (en) | Pressureless liquid phase sintered silicon carbide ceramic and preparation method thereof | |
| CN114749217A (en) | Honeycomb ceramic catalyst active coating and preparation method thereof | |
| CN106083001B (en) | Nanocrystalline blue ceramic corundum abrasive and preparation method thereof | |
| CN111072375A (en) | Preparation method of aluminum oxide grinding balls | |
| CN113173779B (en) | Alumina filler particles, preparation method thereof and preparation method of alumina filler balls | |
| CN108311134B (en) | Titanium-tungsten-silicon composite powder for SCR denitration of diesel vehicle/ship tail gas and preparation method thereof | |
| CN111484050B (en) | Preparation method of spheroidal alpha-phase nano-alumina | |
| CN106390772A (en) | Ceramic filter membrane and preparation method thereof | |
| CN113831129B (en) | Preparation method of superhard cutter | |
| CN115845930A (en) | Application of rice hull as molecular sieve catalyst forming template | |
| CN114477951A (en) | High-strength high-whiteness ceramic product and processing technology thereof | |
| CN113149670A (en) | Technological method for preparing compact calcium dialuminate refractory clinker by one-step method | |
| CN114380283A (en) | Preparation method of porous carbon and porous carbon prepared by preparation method | |
| CN104817312A (en) | High-strength ceramic and preparation method thereof | |
| CN111187063A (en) | Nickel-zinc ferrite powder production process and preparation method thereof | |
| CN110563442A (en) | Preparation method and use method of additive for clay ceramic product | |
| CN111841555A (en) | Direct cracking of methanol to produce CO and H2Catalyst, preparation method and application | |
| JPH01298026A (en) | Production of uo2 pellet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |