CN108926962A - Ammonia-containing exhaust recovery and treatment method - Google Patents
Ammonia-containing exhaust recovery and treatment method Download PDFInfo
- Publication number
- CN108926962A CN108926962A CN201810919382.6A CN201810919382A CN108926962A CN 108926962 A CN108926962 A CN 108926962A CN 201810919382 A CN201810919382 A CN 201810919382A CN 108926962 A CN108926962 A CN 108926962A
- Authority
- CN
- China
- Prior art keywords
- ammonia
- desorption
- absorption
- containing exhaust
- rectifying column
- 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
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/50—Inorganic acids
- B01D2251/512—Phosphoric acid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/406—Ammonia
Abstract
A kind of ammonia-containing exhaust recovery and treatment method, has follow steps: 1) ammonia-containing exhaust is from the lower part on absorption tower into tower；2) phosphoric acid is sprayed on absorption tower top, the ammonia that phosphoric acid absorbs in tail gas obtains monoammonium phosphate solution, as lean solution is absorbed, absorbs NH in lean solution3/H3PO4Amount of substance ratio≤1.21；3) ammonia-containing exhaust counter current contacting absorbs lean solution, and the ammonia in tail gas reacts generation Diammonium phosphate (DAP) with the monoammonium phosphate absorbed in lean solution, is absorbed rich solution in the bottom on absorption tower；4) the absorption rich solution that step 3) absorb the bottom of the tower obtains is delivered in the middle part of desorption rectifying column, and desorption rectifying column lower part leads to steam heating, and the absorption rich solution into desorption rectifying column desorbs NH3, NH3In desorption rectifying column rectifying section concentrate, the NH of concentrate3By desorbing rectifying column segregator, the NH of condensation3Reflux, the NH not coagulated3It recycles after deep cooling is dehydrated, is absorbed lean solution in desorption rectifier bottoms, be delivered to absorption tower top and spray into tower, form circulation.
Description
Technical field
The present invention relates to the field of tail gas treatment, in particular to a kind of ammonia-containing exhaust recovery and treatment method.
Background technique
Ammonia is the corrosive gas of colourless, toxic, easy reaction, strong peculiar smell.Ammonia meeting intense stimulus people and animals mucous membrane is such as
Eyes, corrugated hose, under a high concentration condition can be lethal in a few minutes.In chemical industry, such as petrochemical industry, food processing, make
The industries such as paper, weaving, wastewater treatment, sludge treatment and chemical fertilizer manufacture will use or generate ammonia.
Above-mentioned industry is during processing, if the tail gas not strict control of discharge, causes the non-controlling of ammonia to discharge,
The damage on body can be not only caused to operator, there is also the hidden danger of certain fire explosion.In addition, being discharged into environment
More ammonia also will cause a series of problems, such as water eutrophication, atmosphere pollution.Therefore, the row of ammonia is reduced in Chemical Manufacture
It puts, can not only remove a hidden danger, reduce pollution, moreover it is possible to increase economic efficiency.Ammonia in chemical industry production generally there are two types of source,
First is that as reaction raw materials excess, for example excessive ammonium hydroxide reacts with paranitrochlorobenzene and prepares paranitroanilinum, excess of ammonia and
Propylene carries out ammoxidation production acrylonitrile etc.；Another kind is to generate in reaction process, for example fusion method generates cyanuric acid, imido
Base diacetonitrile alkaline hydrolysis etc..
Currently, being usually to use salt acid-utilising reaction equation NH for the processing method of nitrogenous tail gas3+HCl→NH4Cl is utilized
Ammonia higher cost in absorption by Hydrochloric Acid ammonia-containing exhaust, economic benefit are bad.Also have and reaction equation 4NH is utilized using high temperature incineration3+
3O2→2N2+6H2O, when removing the ammonia in tail gas in this way, if the oxygen in combustion chamber is insufficient or temperature is not high enough
When, the ammonia in tail gas can not react completely generates N2, and nitrogen oxides can be generated, it needs to install additional denitrification device, causes
Except ammonia cost is excessively high, and emission intensity is not can avoid.
Summary of the invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide a kind of ammonia-containing exhaust recovery and treatment method, structures
It is simple and convenient to operate, absorbing lean solution can be recycled, and recovery processing ammonia-containing exhaust is at low cost, treated tail gas ammon amount≤
1.0mg/m3, reach environmental protection standard, ammonolysis product purity >=95% of recycling meets recycling standard.
The technical scheme is that ammonia-containing exhaust recovery and treatment method, using following steps:
1) ammonia-containing exhaust passes through tail gas buffer, from the lower part on absorption tower into tower, the wherein lower part setting of absorption tower inner cavity
Level-one sky sprays cyclic absorption section, and setting second level sky sprays cyclic absorption section, the top setting of absorption tower inner cavity in the middle part of the inner cavity of absorption tower
Filler clean-up stage；
2) phosphoric acid is sprayed on absorption tower top, the ammonia that phosphoric acid absorbs in tail gas obtains monoammonium phosphate solution, poor as absorbing
Liquid absorbs NH in lean solution3/H3PO4Amount of substance ratio≤1.21；
3) ammonia-containing exhaust counter current contacting absorbs lean solution, and the ammonia in tail gas reacts generation with the monoammonium phosphate absorbed in lean solution
Diammonium phosphate (DAP) is absorbed rich solution in the bottom on absorption tower；
4) the absorption rich solution that step 3) absorb the bottom of the tower obtains is delivered in the middle part of desorption rectifying column, desorbs rectifying column lower part
Logical steam heating, the absorption rich solution into desorption rectifying column desorb NH3, NH3Rectifying column rectifying section concentrate is being desorbed, concentrate
NH3By desorbing rectifying column segregator, the NH of condensation3Reflux, the NH not coagulated3It is recycled after deep cooling is dehydrated, in desorption rectifying
Tower bottom is absorbed lean solution, is delivered to absorption tower top and sprays into tower, forms circulation.
Step 1) the ammonia-containing exhaust by 8% weight NH3, 4-6% weight CO2, surplus N2Composition.
Step 1) ammonia-containing exhaust is after compressor compresses from the lower part on absorption tower into tower.
The absorption lean solution temperature of step 2) is 40-60 DEG C.
The cooling medium that step 4) desorbs rectifying column segregator is recirculated water.
It has the advantages that by adopting the above technical scheme
1, the present invention is stablized using monoammonium phosphate solution as lean solution, monoammonium phosphate property is absorbed, and to be heated to 103 DEG C of
It can decompose, the ammonia vapour pressure for being heated to monoammonium phosphate at 125 DEG C is still very low.Monoammonium phosphate and the ammonia formula that reacts are as follows:
Diammonium phosphate (DAP) is more unstable, and apparent ammonia vapour pressure has just been generated at 50 DEG C, starts when temperature is up to 70 DEG C
It releases ammonia and becomes monoammonium phosphate.Utilize the conversion between monoammonium phosphate and Diammonium phosphate (DAP), monoammonium phosphate absorbing ammonia in absorption tower
Gas, making that treated, exhaust emissions is up to standard, and obtained Diammonium phosphate (DAP) is sent to desorption rectifying column and decomposes release ammonia, and ammonia is returned
It receives and utilizes, generate monoammonium phosphate and be recycled to absorption tower, by low temperature absorption, desorption under high temperature, realize the suction of ammonia in ammoxidation tail gas
Receipts and reuse.
2, the present invention absorbs NH in lean solution3/H3PO4Amount of substance ratio≤1.21, guarantee absorb lean solution to ammonia in ammonia-containing exhaust
Absorption efficiency.If absorbing NH in lean solution3/H3PO4Amount of substance ratio be greater than 1.21, then absorb lean solution to ammonia in ammonia-containing exhaust
Assimilation effect is bad, is not able to satisfy exhaust emission standard.
3, it is 40-60 DEG C that present invention control, which absorbs the temperature of lean solution, guarantees monoammonium phosphate stabilization, di(2-ethylhexyl)phosphate in absorption tower
It is amine stabilized, guarantee the absorptivity to ammonia in tail gas, keeps the tail gas discharged after processing up to standard.
It is further described with reference to the accompanying drawings and detailed description.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
In attached drawing, 1 is compressor, and 2 be absorption tower, and 3 be desorption rectifying column, and a is the first dehvery pump, and b is the second dehvery pump,
C is third dehvery pump.
Specific embodiment
Referring to Fig. 1, for the process flow chart of the nitrogenous tail gas recycle processing method of the present invention.Ammonia nitriding tail gas composition to be processed
And treating capacity is as shown in table 1:
Table 1
According to GB 16297-1996 discharge standard of air pollutants (new pollution sources) and GB 14554-1993 stench
Emission standard, the discharge standard of pollutant in this programme are as follows:
Treatment process are as follows: ammonia nitriding tail gas (45-55 DEG C) compresses after tail gas buffer buffers reduction of speed through compressor 1
From 2 lower part of absorption tower at the uniform velocity into tower, the feed rate of ammonia nitriding tail gas is 4700-5300kg/h.Absorption tower 2 is plate column, is inhaled
The lower part setting level-one sky for receiving tower inner cavity sprays cyclic absorption section, and setting second level sky sprays cyclic absorption section in the middle part of the inner cavity of absorption tower, inhales
Filler clean-up stage is arranged in the top for receiving tower inner cavity.Phosphoric acid is sprayed on absorption tower top, as initial absorption liquid, in phosphoric acid and tail gas
Ammonia reaction, generate monoammonium phosphate solution, as lean solution is absorbed, by the first dehvery pump a, from 2 top of absorption tower spray into
Tower, the temperature for absorbing lean solution is 40-60 DEG C, absorbs NH in lean solution3/H3PO4Amount of substance ratio≤1.21, when whole system run
After stabilization, supplement water is also sprayed to absorption tower top by the first dehvery pump a, the feed rate of water is 75-80kg/h.Tail containing ammonia
Gas countercurrent, which contacts, absorbs lean solution, and 95% or more ammonia is inhaled in absorption tower level-one sky spray cyclic absorption section in ammonia nitriding tail gas
It receives, the ammonia in tail gas is reacted with the monoammonium phosphate in monoammonium phosphate solution generates Diammonium phosphate (DAP), obtains richness in absorb the bottom of the tower
The tail gas (nitrogen and carbon dioxide) of liquid, processing is discharged at the top of absorption tower.The absorption rich solution that absorb the bottom of the tower obtains passes through the
Two dehvery pump b are exported to 3 middle part of desorption rectifying column, and desorption 3 lower part of rectifying column leads to steam heating, and steam pressure 1-1.5MPa steams
Steam flow amount is 4-5t/h.Into the NH of desorption rectifying column absorbed in rich solution3It desorbs, flow 300-500kg/h, and is solving
Inhale rectifying column rectifying section concentrate, the NH of concentrate3Condensate liquid is obtained simultaneously by recirculated water partial condensation in desorption rectifying column segregator
Reflux, the NH not coagulated3It is recycled after deep cooling is dehydrated.It is absorbed lean solution in desorption 3 bottom of rectifying column, absorbs lean solution and pass through
Third dehvery pump c is delivered to absorption tower top and sprays into tower, forms circulation.
By recovery and treatment method of the present invention treated ammonia nitriding tail gas, meets malodorous discharge primary standard, obtain
Ammonolysis product contains a small amount of carbon dioxide and water, and product purity is higher than 95%.
Claims (5)
1. a kind of ammonia-containing exhaust recovery and treatment method, which is characterized in that use following steps:
1) ammonia-containing exhaust passes through tail gas buffer, and from the lower part on absorption tower into tower, wherein level-one is arranged in the lower part of absorption tower inner cavity
Sky spray cyclic absorption section, absorption tower inner cavity middle part setting second level sky spray cyclic absorption section, and filler is arranged in the top of absorption tower inner cavity
Clean-up stage；
2) phosphoric acid is sprayed on absorption tower top, the ammonia that phosphoric acid absorbs in tail gas obtains monoammonium phosphate solution, as lean solution is absorbed, inhales
Receive NH in lean solution3/H3PO4Amount of substance ratio≤1.21；
3) ammonia-containing exhaust counter current contacting absorbs lean solution, and the ammonia in tail gas is reacted with the monoammonium phosphate absorbed in lean solution generates phosphoric acid
Diammonium is absorbed rich solution in the bottom on absorption tower；
4) the absorption rich solution that step 3) absorb the bottom of the tower obtains is delivered in the middle part of desorption rectifying column, and desorption rectifying column lower part is logical to steam
Vapour heating, the absorption rich solution into desorption rectifying column desorb NH3, NH3In desorption rectifying column rectifying section concentrate, the NH of concentrate3Through
Cross desorption rectifying column segregator, the NH of condensation3Reflux, the NH not coagulated3It is recycled after deep cooling is dehydrated, at desorption rectifying column bottom
Portion is absorbed lean solution, is delivered to absorption tower top and sprays into tower, forms circulation.
2. ammonia-containing exhaust recovery and treatment method according to claim 1, it is characterised in that: the step 1) ammonia-containing exhaust by
The NH of 8% weight3, 4-6% weight CO2, surplus N2Composition.
3. ammonia-containing exhaust recovery and treatment method according to claim 1 or 2, it is characterised in that: step 1) ammonia-containing exhaust warp
From the lower part on absorption tower into tower after compressor compresses.
4. ammonia-containing exhaust recovery and treatment method according to claim 1, it is characterised in that: the absorption lean solution temperature of step 2)
It is 40-60 DEG C.
5. ammonia-containing exhaust recovery and treatment method according to claim 1, it is characterised in that: step 4) desorbs rectifying column fractional condensation
The cooling medium of device is recirculated water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810919382.6A CN108926962A (en) | 2018-08-10 | 2018-08-10 | Ammonia-containing exhaust recovery and treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810919382.6A CN108926962A (en) | 2018-08-10 | 2018-08-10 | Ammonia-containing exhaust recovery and treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108926962A true CN108926962A (en) | 2018-12-04 |
Family
ID=64445062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810919382.6A Pending CN108926962A (en) | 2018-08-10 | 2018-08-10 | Ammonia-containing exhaust recovery and treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108926962A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109529545A (en) * | 2018-12-12 | 2019-03-29 | 安徽金禾实业股份有限公司 | A kind of methyl acetoacetate exhaust gas treating method and device |
| CN110280104A (en) * | 2019-06-24 | 2019-09-27 | 天华化工机械及自动化研究设计院有限公司 | A kind of phosphorus ammonium method processing catalyst ammonia-contaminated gas and ammonia reclaiming process |
| CN110917793A (en) * | 2019-12-16 | 2020-03-27 | 湖南众鑫新材料科技股份有限公司 | Method for preparing ammonia water from low-valence vanadium waste gas |
| CN111442968A (en) * | 2020-05-27 | 2020-07-24 | 北京航天益来电子科技有限公司 | Denitration tail gas online monitoring and ammonia removal device and method |
| CN113041790A (en) * | 2021-03-17 | 2021-06-29 | 中国科学院过程工程研究所 | Novel process for recovering ammonia in melamine tail gas based on ionic liquid absorption-adsorption separation |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1608978A (en) * | 2003-10-24 | 2005-04-27 | 四川大学 | Method of processing waste gas from ammonium phosphate plate into slurry for two-purpose utilization |
| CN101264901A (en) * | 2008-04-29 | 2008-09-17 | 石家庄工大化工设备有限公司 | Ammonia recovery method for gas mixture in hydrogen cyanide production |
| CN101544380A (en) * | 2009-04-29 | 2009-09-30 | 上海宝钢工程技术有限公司 | System for producing strong ammonia water by absorbing ammonia in air |
| CN102730720A (en) * | 2011-04-14 | 2012-10-17 | 重庆紫光化工股份有限公司 | Method and system for recovering ammonia from gas containing hydrocyanic acid |
| CN103446865A (en) * | 2013-07-03 | 2013-12-18 | 四川大学 | Nitrophosphate tail gas deamination device and nitrophosphate tail gas deamination process |
| CN104437055A (en) * | 2014-11-25 | 2015-03-25 | 中冶焦耐工程技术有限公司 | Negative-pressure ammonia distillation process and equipment for deaminizing ammonia before vacuum pump |
| WO2015136444A1 (en) * | 2014-03-10 | 2015-09-17 | Saipem S.P.A. | Recovery system and method for processing a gas stream from a urea plant solidification unit |
| CN105645436A (en) * | 2016-03-18 | 2016-06-08 | 安徽省化工设计院 | Novel system for recycling ammonia from waste gas produced by benzene and cyanogen device |
| CN105983323A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Spraying device and neutralization method |
-
2018
- 2018-08-10 CN CN201810919382.6A patent/CN108926962A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1608978A (en) * | 2003-10-24 | 2005-04-27 | 四川大学 | Method of processing waste gas from ammonium phosphate plate into slurry for two-purpose utilization |
| CN101264901A (en) * | 2008-04-29 | 2008-09-17 | 石家庄工大化工设备有限公司 | Ammonia recovery method for gas mixture in hydrogen cyanide production |
| CN101544380A (en) * | 2009-04-29 | 2009-09-30 | 上海宝钢工程技术有限公司 | System for producing strong ammonia water by absorbing ammonia in air |
| CN102730720A (en) * | 2011-04-14 | 2012-10-17 | 重庆紫光化工股份有限公司 | Method and system for recovering ammonia from gas containing hydrocyanic acid |
| CN103446865A (en) * | 2013-07-03 | 2013-12-18 | 四川大学 | Nitrophosphate tail gas deamination device and nitrophosphate tail gas deamination process |
| WO2015136444A1 (en) * | 2014-03-10 | 2015-09-17 | Saipem S.P.A. | Recovery system and method for processing a gas stream from a urea plant solidification unit |
| CN104437055A (en) * | 2014-11-25 | 2015-03-25 | 中冶焦耐工程技术有限公司 | Negative-pressure ammonia distillation process and equipment for deaminizing ammonia before vacuum pump |
| CN105983323A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Spraying device and neutralization method |
| CN105645436A (en) * | 2016-03-18 | 2016-06-08 | 安徽省化工设计院 | Novel system for recycling ammonia from waste gas produced by benzene and cyanogen device |
Non-Patent Citations (1)
| Title |
|---|
| 中国冶金百科全书总编辑委员会《炼焦化工》卷编辑委员会等: "《中国冶金百科全书》", 31 December 1992, 冶金工业出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109529545A (en) * | 2018-12-12 | 2019-03-29 | 安徽金禾实业股份有限公司 | A kind of methyl acetoacetate exhaust gas treating method and device |
| CN110280104A (en) * | 2019-06-24 | 2019-09-27 | 天华化工机械及自动化研究设计院有限公司 | A kind of phosphorus ammonium method processing catalyst ammonia-contaminated gas and ammonia reclaiming process |
| CN110917793A (en) * | 2019-12-16 | 2020-03-27 | 湖南众鑫新材料科技股份有限公司 | Method for preparing ammonia water from low-valence vanadium waste gas |
| CN111442968A (en) * | 2020-05-27 | 2020-07-24 | 北京航天益来电子科技有限公司 | Denitration tail gas online monitoring and ammonia removal device and method |
| CN113041790A (en) * | 2021-03-17 | 2021-06-29 | 中国科学院过程工程研究所 | Novel process for recovering ammonia in melamine tail gas based on ionic liquid absorption-adsorption separation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108926962A (en) | Ammonia-containing exhaust recovery and treatment method | |
| US8486357B1 (en) | Desulfurization apparatus and method of using condensed water produced therein | |
| US5378442A (en) | Method for treating combustion exhaust gas | |
| US8877149B2 (en) | Combustion flue gas NOx treatment | |
| US5834722A (en) | Method and apparatus for treating waste gases by exposure to electron beams | |
| CN103785263B (en) | A kind of method that ammonia vent gas treatment reclaims | |
| JP7062509B2 (en) | Carbon capture | |
| CN100531867C (en) | Method and apparatus for combined removing sulfur-dioxide and nitrogen oxide by mixed solution | |
| CN100427391C (en) | Tail gas treatment and reutilization for calcium carbide stove | |
| EP2459301B1 (en) | Process and apparatus for recovering ammonia from a gas stream | |
| US5164167A (en) | Process for the removal of acid forming gases from exhaust gases | |
| CN103977682A (en) | Simultaneous desulfurization and denitrification method for flue gas | |
| US4434144A (en) | Absorption of CO2 and/or H2 S utilizing solutions containing two different activators | |
| AU2006277606A1 (en) | Method for the production of fertilizer and CO2 | |
| CN106540524A (en) | For the semi-dry desulfurization and denitrification device and desulfurizing and denitrifying process of high sulfur concentration flue gas | |
| SU973012A3 (en) | Process for separating ammonia and carbon dioxide | |
| CN108800147A (en) | Low NOx burning process and its device | |
| CA1107936A (en) | Manufacture of ammonium nitrate | |
| JPH05245340A (en) | Treatment of combustion exhaust gas | |
| WO1999010084A1 (en) | Process for the preparation of fertilizers and sulfur compounds | |
| GB1453422A (en) | Synthesis of urea | |
| CN111359398B (en) | Method for denitration and whitening of flue gas | |
| RU2006268C1 (en) | Method of purifying gases from sulfur- and nitrogen-oxides | |
| CN204897467U (en) | A processing system for water -gas shift unit contain ammonia wastewater | |
| TW201912235A (en) | Gas treatment method and apparatus for ammonia-contained gas |
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 |
Application publication date: 20181204 |
|
| RJ01 | Rejection of invention patent application after publication |