CN106824284A - A kind of preparation method of ternary catalyzing unit renovation agent - Google Patents
A kind of preparation method of ternary catalyzing unit renovation agent Download PDFInfo
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- CN106824284A CN106824284A CN201710075569.8A CN201710075569A CN106824284A CN 106824284 A CN106824284 A CN 106824284A CN 201710075569 A CN201710075569 A CN 201710075569A CN 106824284 A CN106824284 A CN 106824284A
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- 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
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
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- 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
- B01J38/00—Regeneration or reactivation of catalysts, in general
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- 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
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/02—Heat treatment
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Abstract
The present invention provides a kind of preparation method of ternary catalyzing unit renovation agent, and butyl titanate is made into gel with sol-gal process, adds nanoscale precious metal and nano-scale rare earth powder, stirs and obtains final product.Ternary catalyzing unit renovation agent of the present invention is made gel using butyl titanate, adds nanoscale precious metal and nano-scale rare earth powder, improves noble metal, the active ingredient of rare earth is evenly distributed in catalyst converter, improves catalytic effect；By using supercritical CO2Condition is dried so that renovation agent forms the film of uniformly continuous, and attachment fastness is high, and reduction comes off, and increases the continuity of hole, repairs original crackle；There is the hole of abundant even level on film, surface area is very big, improves catalytic effect.Mixed with nano imvite by using nano rare earth, reduction sintering, the cubic lattice structure of nano imvite improves the stability and dispersing uniformity of rare earth, improves catalytic efficiency.
Description
Technical field
The present invention relates to ternary catalyzing unit renovation agent technical field, especially a kind of preparation side of ternary catalyzing unit renovation agent
Method.
Background technology
The main method taken of improvement to automobile exhaust pollution is the outer after-treatment device ternary catalyzing unit of machine, by ternary
Catalyst is by CO, oxidizing hydrocarbon into carbon dioxide（CO2）, water（H2O）, and oxynitrides is reduced to nitrogen simultaneously
（N2）, the purification of tail gas is realized, three-way catalyst is made up of cellular structure ceramic carrier or metallic carrier and catalyst coat.Catalysis
Agent coating is generally by the oxide material with large specific surface area（Such as aluminum oxide）, hydrogen-storing material and be dispersed in oxide or storage
The noble metal active component of oxygen material surface（It is often Pt（Platinum）、Pd（Palladium）、Rh（Rhodium）In one or more）Composition.It is therein
Hydrogen-storing material is generally the composite oxides containing cerium zirconium, and it is by oxygen in adsorption storage tail gas or discharges oxygen and adjusts tail gas
The ratio of middle oxidizing component and reproducibility component, oxynitrides quilt while being oxidized carbon monoxide and hydrocarbon
Reduction.
Catalyst converter is poisoned, it is necessary to repair by that can be come off using rear catalyst.It is right that the performance recovery of spent catalyst needs
The deposit on its surface carries out regeneration removing, and the various aspects of performance of catalyst has obtained a certain degree of recovery, but recovers journey
Degree is limited.Common renovation agent is to carry out impregnation drying, and hole is big, crackle easily occurs, and catalytic efficiency is low, it is necessary to further carry
The performance of renovation agent high improves catalytic effect, economizes on resources.
The content of the invention
It is an object of the invention to provide a kind of renovation agent that can repair catalyst converter catalysis, catalysis can either be improved
Effect, additionally it is possible to improve the attachment fastness of catalyst, reduction comes off, and increases the continuity of hole, reduces crackle.
To achieve the above object, the present invention provides a kind of preparation method of ternary catalyzing unit renovation agent, uses sol-gal process
Butyl titanate is made gel, nanoscale precious metal and nano-scale rare earth powder is added, is stirred and is obtained final product.
The mass fraction of titanium is 25-30wt% in the butyl titanate gel.
The nanoscale precious metal is Pt nano particle, Pd, Rh.
The mass fraction of the nanoscale precious metal is 6-7wt%.
The nano-scale rare earth powder is one or more in a nanometer lanthanum, cerium, praseodymium.
The mass fraction of the nano-scale rare earth powder is 5-5.8wt%.
The nano-scale rare earth powder is doped with nano imvite, and preparation method is：By nano rare earth：Nano imvite is pressed
Mass ratio is 1:2-2.5 is well mixed, and obtains mixed material, is sintered under reducing atmosphere, and sintering temperature is 900-1000
DEG C, crush, 800-1000 mesh sieves are crossed, obtain powder；
A kind of spraying method of ternary catalyzing unit renovation agent, using spray gun by renovation agent even application on carrier, overcritical
CO2Under the conditions of dry.
It is an advantage of the invention that：Ternary catalyzing unit renovation agent of the present invention is made gel using butyl titanate, adds and receives
Meter level noble metal and nano-scale rare earth powder, improve noble metal, the active ingredient of rare earth is evenly distributed in catalyst converter, improve
Catalytic effect；By using supercritical CO2Condition is dried so that renovation agent forms the film of uniformly continuous, and attachment fastness is high, subtracts
Come off less, increase the continuity of hole, repair original crackle；There is the hole of abundant even level on film, surface area is very
Greatly, catalytic effect is improved.Mixed with nano imvite by using nano rare earth, reduction sintering, the solid of nano imvite is brilliant
Lattice structure improves the stability and dispersing uniformity of rare earth, improves catalytic efficiency.
Specific embodiment
Further to illustrate technological means and its effect that the present invention is taken, below in conjunction with preferred embodiment of the invention
It is described in detail.
Embodiment 1：, be made for butyl titanate with sol-gal process solidifying by a kind of preparation method of ternary catalyzing unit renovation agent
Glue, adds nanoscale precious metal and nano-scale rare earth powder, stirs and obtains final product.
The mass fraction of titanium is 25wt% in the butyl titanate gel.
The nanoscale precious metal is Pt nano particle, Pd, Rh.
The mass fraction of the nanoscale precious metal is 6wt%.
The nano-scale rare earth powder is one or more in a nanometer lanthanum, cerium, praseodymium.
The mass fraction of the nano-scale rare earth powder is 5wt%.
The nano-scale rare earth powder is doped with nano imvite, and preparation method is：By nano rare earth：Nano imvite is pressed
Mass ratio is 1:2 are well mixed, and obtain mixed material, are sintered under reducing atmosphere, and sintering temperature is 900 DEG C, is crushed, mistake
800 mesh sieves, obtain powder；
A kind of spraying method of ternary catalyzing unit renovation agent, using spray gun by renovation agent even application on carrier, overcritical
CO2Under the conditions of dry.
Embodiment 2：A kind of renovation agent that can repair catalyst converter catalysis, can either improve catalytic effect, additionally it is possible to
The attachment fastness of catalyst is improved, reduction comes off, increase the continuity of hole, reduce crackle.
To achieve the above object, the present invention provides a kind of preparation method of ternary catalyzing unit renovation agent, uses sol-gal process
Butyl titanate is made gel, nanoscale precious metal and nano-scale rare earth powder is added, is stirred and is obtained final product.
The mass fraction of titanium is 30wt% in the butyl titanate gel.
The nanoscale precious metal is Pt nano particle, Pd, Rh.
The mass fraction of the nanoscale precious metal is 7wt%.
The nano-scale rare earth powder is one or more in a nanometer lanthanum, cerium, praseodymium.
The mass fraction of the nano-scale rare earth powder is 5.8wt%.
The nano-scale rare earth powder is doped with nano imvite, and preparation method is：By nano rare earth：Nano imvite is pressed
Mass ratio is 1:2.5 are well mixed, and obtain mixed material, are sintered under reducing atmosphere, and sintering temperature is 1000 DEG C, powder
It is broken, 1000 mesh sieves are crossed, obtain powder；
A kind of spraying method of ternary catalyzing unit renovation agent, using spray gun by renovation agent even application on carrier, overcritical
CO2Under the conditions of dry.
Claims (8)
1. a kind of preparation method of ternary catalyzing unit renovation agent, it is characterised in that：Butyl titanate is made with sol-gal process
Gel, adds nanoscale precious metal and nano-scale rare earth powder, stirs and obtains final product.
2. the preparation method of ternary catalyzing unit renovation agent according to claim 1, it is characterised in that：The butyl titanate
The mass fraction of titanium is 25-30wt% in gel.
3. the preparation method of ternary catalyzing unit renovation agent according to claim 1, it is characterised in that：The expensive gold of nanoscale
Belong to is Pt nano particle, Pd, Rh.
4. the preparation method of ternary catalyzing unit renovation agent according to claim 1, it is characterised in that：The expensive gold of nanoscale
The mass fraction of category is 6-7wt%.
5. the preparation method of ternary catalyzing unit renovation agent according to claim 1, it is characterised in that：The nano-scale rare earth
Powder is one or more in a nanometer lanthanum, cerium, praseodymium.
6. the preparation method of ternary catalyzing unit renovation agent according to claim 1, it is characterised in that：The nano-scale rare earth
The mass fraction of powder is 5-5.8wt%.
7. the preparation method of ternary catalyzing unit renovation agent according to claim 1, it is characterised in that：The nano-scale rare earth
Powder is doped with nano imvite, and preparation method is：By nano rare earth：Nano imvite is 1 in mass ratio:2-2.5 mixing is equal
It is even, mixed material is obtained, it is sintered under reducing atmosphere, sintering temperature is 900-1000 DEG C, is crushed, and crosses 800-1000 mesh
Sieve, obtains powder.
8. a kind of spraying method of ternary catalyzing unit renovation agent, it is characterised in that：Renovation agent even application is being carried using spray gun
On body, in supercritical CO2Under the conditions of dry.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710075569.8A CN106824284A (en) | 2017-02-13 | 2017-02-13 | A kind of preparation method of ternary catalyzing unit renovation agent |
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| CN201710075569.8A CN106824284A (en) | 2017-02-13 | 2017-02-13 | A kind of preparation method of ternary catalyzing unit renovation agent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107442133A (en) * | 2017-08-18 | 2017-12-08 | 江苏万路达环保科技有限公司 | Colloidal sol type ternary catalyzing unit renovation agent |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101015801A (en) * | 2007-02-07 | 2007-08-15 | 大连理工大学 | Catalyst for catalytic cleaning of lean-burn engine tail gas and its preparing process |
| CN106040281A (en) * | 2016-06-08 | 2016-10-26 | 安徽新态环保科技有限公司 | Nanometer repairing agent for three-way catalytic converters |
-
2017
- 2017-02-13 CN CN201710075569.8A patent/CN106824284A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101015801A (en) * | 2007-02-07 | 2007-08-15 | 大连理工大学 | Catalyst for catalytic cleaning of lean-burn engine tail gas and its preparing process |
| CN106040281A (en) * | 2016-06-08 | 2016-10-26 | 安徽新态环保科技有限公司 | Nanometer repairing agent for three-way catalytic converters |
Non-Patent Citations (1)
| Title |
|---|
| 周学良主编: "《精细化工产品手册 催化剂》", 30 November 2002, 化学工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107442133A (en) * | 2017-08-18 | 2017-12-08 | 江苏万路达环保科技有限公司 | Colloidal sol type ternary catalyzing unit renovation agent |
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Application publication date: 20170613 |
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