CN106861771A - A kind of method for cleaning automobile three-way catalysts - Google Patents
A kind of method for cleaning automobile three-way catalysts Download PDFInfo
- Publication number
- CN106861771A CN106861771A CN201710075570.0A CN201710075570A CN106861771A CN 106861771 A CN106861771 A CN 106861771A CN 201710075570 A CN201710075570 A CN 201710075570A CN 106861771 A CN106861771 A CN 106861771A
- Authority
- CN
- China
- Prior art keywords
- cleaning
- way catalysts
- automobile
- fuel
- catalysts method
- 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
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
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/02—Heat treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0007—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by explosions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/04—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by a combination of operations
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Detergent Compositions (AREA)
- Catalysts (AREA)
Abstract
A kind of method for cleaning automobile three-way catalysts, cleaning step is：Tetra-n-butyl titanate is carried out into alcoholysis hydrolysis, nitric acid is added, clarification is changed into solution, add fuel, it is 9 10 to add ammoniacal liquor regulation pH value, adds cleaning agent, is heated to 45 50 DEG C and stirs 34 hours, obtains cleaning fluid；The fuel is citric acid, glycine, urea；The present invention carries out combustion reaction using tetra-n-butyl titanate, nitric acid, fuel, form gas, carbon distribution is fully burnt, the pollutants such as the sulfur-containing, phosphorus-containing in carrier hole are thoroughly removed in the impact of gas, the titanium of continuous nanoaperture can also be formed on carrier, surface area is increased, catalytic performance is improve, the attachment fastness of follow-up spraying catalyst is improved.Cleaning agent good penetrability of the invention, can fully react at high temperature, improve cleaning performance.
Description
Technical field
The present invention relates to clean ternary catalyzing unit technical field, especially it is a kind of clean automobile three-way catalysts method.
Background technology
The ternary catalyzing unit of automobile is to improve motor vehicle emission, reduces the important component of automobile exhaust pollution.But with making
The catalysis that can be deposited on three-way catalytic converter carrier with the growth of time, carbon distribution, sulfur-bearing in vehicle exhaust, phosphorous compound
On agent surface, cause catalyst poisoning, catalytic efficiency declines, substantially reduce ternary catalyzing unit to purifying vehicle exhaust effect.
The machine that is cleaned to ternary catalyzing unit at present, major part be to beat transfusion bottle in the way of, by flammable clear of oiliness
Lotion is sprayed into air intake duct, participates in burning, improves the temperature of combustion gas to remove the pollutant on three-way catalytic converter carrier.So
There are two drawbacks：1st, the effect of accelerated combustion and removing can only be played to carbon distribution, for the deposit of sulfur-containing, phosphorus-containing, due to
This two classes deposit is non-combustible, so the effect of cleaning can not be played.2nd, the operating temperature of ternary catalyzing unit is raised, beyond three
The normal range of operation of first catalyst converter, shortens the service life of ternary catalyzing unit.
The content of the invention
It is an object of the invention to provide a kind of cleaning agent that can speed up burning and decarbonizing, the hole of carrier is penetrated into
Gap, thoroughly removes the dirt for blocking hole, additionally it is possible to the titanium of continuous nanoaperture is formed on carrier, improves catalytic performance,
Improve the attachment fastness of follow-up spraying catalyst.
To achieve the above object, the present invention provides a kind of method for cleaning automobile three-way catalysts, and cleaning step is：
（1）Tetra-n-butyl titanate is carried out into alcoholysis hydrolysis, nitric acid is added, clarification is changed into solution, add fuel, added
Ammoniacal liquor regulation pH value is 9-10, adds cleaning agent, is heated to 45-50 DEG C and stirs 3-4 hours, obtains cleaning fluid；The fuel
It is citric acid, glycine, urea；
（2）By the cleaning fluid add supersonic wave cleaning machine cell body in, then by appearance through flushing ternary catalyzing unit be immersed in
In solution, soaked；
（3）Supersonic cleaning machine is opened, is cleaned by ultrasonic；
（4）After ultrasonic cleaning terminates, ternary catalyzing unit is taken out, be put into muffle furnace, calcined 3-4 hours at 360-410 DEG C；
（5）Ternary catalyzing unit after calcining is washed using clear water, natural air drying.
The mass fraction of titanium is 12-16wt% in the cleaning fluid.
Quality of fuel number is 12-16wt% in the cleaning fluid.
The mass fraction that cleaning agent is added in the cleaning fluid is 3-4wt%.
The soak time of the ternary catalyzing unit is 3-6 hours.
The time of the ultrasonic cleaning is 8-15 minutes.
The component of the cleaning agent is lauryl sodium sulfate 8-10wt%, menthol 6-8%, thiacyclohexane 22-26wt%, first
Benzene 8-10wt%, tartaric acid 6-8%, benzoic acid 10-15wt%, water 4-6wt%, urea 5-6wt%, NPE 9-
11wt%。
It is an advantage of the invention that：The present invention carries out combustion reaction using tetra-n-butyl titanate, nitric acid, fuel, forms gas,
Carbon distribution is fully burnt, the pollutants such as the sulfur-containing, phosphorus-containing in carrier hole are thoroughly removed in the impact of gas, additionally it is possible in carrier
The upper titanium for forming continuous nanoaperture, increases surface area, improves catalytic performance, improves the attachment of follow-up spraying catalyst
Fastness.Cleaning agent good penetrability of the invention, can fully react at high temperature, improve cleaning performance.
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：
A kind of method for cleaning automobile three-way catalysts, cleaning step is：
（1）Tetra-n-butyl titanate is carried out into alcoholysis hydrolysis, nitric acid is added, clarification is changed into solution, add fuel, added
Ammoniacal liquor regulation pH value is 9, adds cleaning agent, is heated to 45 DEG C and stirs 3 hours, obtains cleaning fluid；The fuel is citric acid；
（2）By the cleaning fluid add supersonic wave cleaning machine cell body in, then by appearance through flushing ternary catalyzing unit be immersed in
In solution, soaked；
（3）Supersonic cleaning machine is opened, is cleaned by ultrasonic；
（4）After ultrasonic cleaning terminates, ternary catalyzing unit is taken out, be put into muffle furnace, calcined 3 hours at 360 DEG C；
（5）Ternary catalyzing unit after calcining is washed using clear water, natural air drying.
The mass fraction of titanium is 12wt% in the cleaning fluid.
Quality of fuel number is 12wt% in the cleaning fluid.
The mass fraction that cleaning agent is added in the cleaning fluid is 3wt%.
The soak time of the ternary catalyzing unit is 3 hours.
The time of the ultrasonic cleaning is 8 minutes.
The component of the cleaning agent is lauryl sodium sulfate 8wt%, menthol 6%, thiacyclohexane 22wt%, toluene 8wt%, wine
Stone acid 6%, benzoic acid 10wt%, water 4wt%, urea 5wt%, NPE 9wt%.
Embodiment 2：
A kind of method for cleaning automobile three-way catalysts, cleaning step is：
（1）Tetra-n-butyl titanate is carried out into alcoholysis hydrolysis, nitric acid is added, clarification is changed into solution, add fuel, added
Ammoniacal liquor regulation pH value is 10, adds cleaning agent, is heated to 50 DEG C and stirs 4 hours, obtains cleaning fluid；The fuel is sweet ammonia
Acid；
（2）By the cleaning fluid add supersonic wave cleaning machine cell body in, then by appearance through flushing ternary catalyzing unit be immersed in
In solution, soaked；
（3）Supersonic cleaning machine is opened, is cleaned by ultrasonic；
（4）After ultrasonic cleaning terminates, ternary catalyzing unit is taken out, be put into muffle furnace, calcined 4 hours at 410 DEG C；
（5）Ternary catalyzing unit after calcining is washed using clear water, natural air drying.
The mass fraction of titanium is 16wt% in the cleaning fluid.
Quality of fuel number is 16wt% in the cleaning fluid.
The mass fraction that cleaning agent is added in the cleaning fluid is 4wt%.
The soak time of the ternary catalyzing unit is 6 hours.
The time of the ultrasonic cleaning is 15 minutes.
The component of the cleaning agent be lauryl sodium sulfate 10wt%, menthol 8%, thiacyclohexane 26wt%, toluene 10wt%,
Tartaric acid 8%, benzoic acid 15wt%, water 6wt%, urea 6wt%, NPE 12wt%.
Claims (7)
1. it is a kind of clean automobile three-way catalysts method, it is characterised in that：Cleaning step is：
（1）Tetra-n-butyl titanate is carried out into alcoholysis hydrolysis, nitric acid is added, clarification is changed into solution, add fuel, added
Ammoniacal liquor regulation pH value is 9-10, adds cleaning agent, is heated to 45-50 DEG C and stirs 3-4 hours, obtains cleaning fluid；The fuel
It is citric acid, glycine, urea；
（2）By the cleaning fluid add supersonic wave cleaning machine cell body in, then by appearance through flushing ternary catalyzing unit be immersed in
In solution, soaked；
（3）Supersonic cleaning machine is opened, is cleaned by ultrasonic；
（4）After ultrasonic cleaning terminates, ternary catalyzing unit is taken out, be put into muffle furnace, calcined 3-4 hours at 360-410 DEG C；
（5）Ternary catalyzing unit after calcining is washed using clear water, natural air drying.
2. it is according to claim 1 cleaning automobile three-way catalysts method, it is characterised in that：Titanium in the cleaning fluid
Mass fraction is 12-16wt%.
3. it is according to claim 1 cleaning automobile three-way catalysts method, it is characterised in that：Fuel in the cleaning fluid
Mass fraction be 12-16wt%.
4. it is according to claim 1 cleaning automobile three-way catalysts method, it is characterised in that：Added in the cleaning fluid
The mass fraction of cleaning agent is 3-4wt%.
5. it is according to claim 1 cleaning automobile three-way catalysts method, it is characterised in that：The ternary catalyzing unit
Soak time is 3-6 hours.
6. it is according to claim 1 cleaning automobile three-way catalysts method, it is characterised in that：The ultrasonic cleaning when
Between be 8-15 minutes.
7. it is according to claim 1 cleaning automobile three-way catalysts method, it is characterised in that：The component of the cleaning agent
It is lauryl sodium sulfate 8-10wt%, menthol 6-8%, thiacyclohexane 22-26wt%, toluene 8-10wt%, tartaric acid 6-8%, benzene first
Sour 10-15wt%, water 4-6wt%, urea 5-6wt%, NPE 9-11wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710075570.0A CN106861771A (en) | 2017-02-13 | 2017-02-13 | A kind of method for cleaning automobile three-way catalysts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710075570.0A CN106861771A (en) | 2017-02-13 | 2017-02-13 | A kind of method for cleaning automobile three-way catalysts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106861771A true CN106861771A (en) | 2017-06-20 |
Family
ID=59167105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710075570.0A Pending CN106861771A (en) | 2017-02-13 | 2017-02-13 | A kind of method for cleaning automobile three-way catalysts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106861771A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102873054A (en) * | 2012-09-21 | 2013-01-16 | 张海峰 | Method for cleaning three-way catalytic converter |
| CN104826669A (en) * | 2015-04-26 | 2015-08-12 | 重庆大学 | Alkali washing liquid for regenerating SCR denitration catalysts and application thereof |
| CN105524747A (en) * | 2014-09-30 | 2016-04-27 | 惠州市祥珅实业有限公司 | Cleaning agent for cleaning of three-way catalytic converter |
| CN105861191A (en) * | 2016-04-25 | 2016-08-17 | 江力 | Function repair liquid for oxygen sensor and three-way catalyst and preparation method and use method |
-
2017
- 2017-02-13 CN CN201710075570.0A patent/CN106861771A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102873054A (en) * | 2012-09-21 | 2013-01-16 | 张海峰 | Method for cleaning three-way catalytic converter |
| CN105524747A (en) * | 2014-09-30 | 2016-04-27 | 惠州市祥珅实业有限公司 | Cleaning agent for cleaning of three-way catalytic converter |
| CN104826669A (en) * | 2015-04-26 | 2015-08-12 | 重庆大学 | Alkali washing liquid for regenerating SCR denitration catalysts and application thereof |
| CN105861191A (en) * | 2016-04-25 | 2016-08-17 | 江力 | Function repair liquid for oxygen sensor and three-way catalyst and preparation method and use method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2336562C (en) | Method for regenerating catalysts | |
| EP3111071B1 (en) | Method and system for controlling nitrogen oxide emissions from a combustion engine | |
| CN102725488A (en) | Exhaust purification device and exhaust purification method for diesel engine | |
| US20100146948A1 (en) | Exhaust system promoting decomposition of reductants into gaseous products | |
| WO2013088850A1 (en) | Aqueous urea-spraying structure | |
| KR20160109977A (en) | Scr system and control method thereof | |
| US10981153B2 (en) | Catalyst and method for preparing catalyst | |
| CN103464221B (en) | SCR denitration system catalyst regeneration equipment and process of regenerating | |
| WO2008012653A3 (en) | Optimal fuel profiles | |
| CN102658184B (en) | Selective urea decomposition catalyst taking honeycomb metal alloy as carrier and preparation method for catalyst | |
| EP3341596B1 (en) | Method and exhaust treatment system for treatment of an exhaust gas stream | |
| WO2012158239A1 (en) | High-temperature scr catalyst | |
| CN107587926A (en) | Exhaust gas from diesel vehicle high-efficiency purifying method and clarifier | |
| CN104415796A (en) | Method for preparing denitrification catalyst with metatitanic acid as raw material in one step | |
| CN106861771A (en) | A kind of method for cleaning automobile three-way catalysts | |
| CN110219724A (en) | A kind of purification of ship tail gas and residual neat recovering system and method | |
| CN107051204B (en) | A kind of preparation process of urea for vehicle solution | |
| KR102067851B1 (en) | Selective catalytic reduction system | |
| KR102157716B1 (en) | Exhaust treatment system and exhaust gas stream treatment method | |
| KR101865744B1 (en) | Device for purifying exhaust gas | |
| CN108678840A (en) | A kind of method for controlling reproduction and device based on air speed | |
| CN205714363U (en) | Automotive exhaust catalysis processor | |
| CN103052775A (en) | After treatment device of engine | |
| CN106925292A (en) | A kind of diesel engine vent gas purify the preparation method of SCR catalyst | |
| CN105443206A (en) | Three-way catalytic converter capable of being cleaned automatically |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170620 |