CN106824172A - The carbon monoxide-olefin polymeric preparation method and application of low concentration formaldehyde in treatment waste water - Google Patents
The carbon monoxide-olefin polymeric preparation method and application of low concentration formaldehyde in treatment waste water Download PDFInfo
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- CN106824172A CN106824172A CN201611128373.2A CN201611128373A CN106824172A CN 106824172 A CN106824172 A CN 106824172A CN 201611128373 A CN201611128373 A CN 201611128373A CN 106824172 A CN106824172 A CN 106824172A
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- Prior art keywords
- waste water
- carbon monoxide
- low concentration
- olefin polymeric
- yttrium
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Classifications
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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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/32—Manganese, technetium or rhenium
- B01J23/34—Manganese
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
Abstract
The invention provides a kind of carbon monoxide-olefin polymeric preparation method and application for processing low concentration formaldehyde in waste water.The described composite oxides are yttrium calcium manganese vanadium oxides composite.A kind of carbon monoxide-olefin polymeric preparation method of low concentration formaldehyde in treatment waste water, methods described follow these steps to carry out：With vanadic anhydride, yttrium nitrate, calcium nitrate, manganese nitrate and hydrogen peroxide as raw material, it is mixed and stirred at low temperature to dissolving, then evaporation drying, yttrium calcium manganese vanadium oxides composite powder is obtained by gained precipitation after calcining.The composite oxide powder of preparation is placed in aqueous slkali and is heated, then filtered, washing to pH value is drying after 6.9 7.2.Yttrium calcium manganese vanadium oxides composite is added in the ratio of 0.5 ~ 4.0g/L waste water, at normal temperatures and pressures stir process 5 30 minutes.Catalyst activity of the invention is high, can quick in the short period of time and efficient catalytic hydrogen peroxide degradation of contaminant, and technological process is simple, and non-secondary pollution is produced.
Description
Technical field：
The present invention relates to field of inorganic material preparing technology, and in particular to a kind of catalyst group for processing low concentration formaldehyde in waste water
Compound preparation method and application.
Background technology：
Formaldehyde is soluble in water and with intense stimulus smell.It is a kind of important industrial chemicals, is widely used in sterilizing, kills
The industries such as bacterium, anti-corrosion, pharmacy, agricultural chemicals, dyestuff, plastics, building.But formaldehyde has the toxicity of height, by world health group
Knit and be defined as carcinogenic and cause deformed material.At present, the method for removing formaldehyde in waste water has absorption method, Ozonation, photocatalysis
Method, hot wet oxidation process, bioanalysis, blow-off method etc..Absorption method poor selectivity, regeneration is difficult.The ozone that Ozonation is utilized
It is very big to human health damage.Photocatalytic method treatment needs to use specific excitation source.Current most popular titanium dioxide
Photochemical catalyst can only utilize ultraviolet light.Hot wet oxidation process energy ezpenditure is high.Biochemical method low cost, but reaction speed is slow,
Treatment facility floor space is big.Blow-off method effect on driving birds is not good.
Catalysis oxidation formaldehyde is a kind of method of effective removal formaldehyde at room temperature.Widely paid close attention in recent years.But
It is the catalyst of the method all comprising at least one noble metal.The Pt/SnO of United States Patent (USP) US5585083 inventions2Catalyst is in room
Temperature can be degradable for carbon dioxide and water by formaldehyde.But, the noble metal that mass fraction is 12% is contained in the catalyst
Pt.Chinese patent CN103071489A discloses a kind of preparation side of the carried active carbon catalysis material of the formaldehyde of removal at room temperature
Method.Include the noble metal active group of the one kind or its combination in 0.1 ~ 2% gold, palladium, platinum, rhodium, ruthenium in the catalysis material
Point.Chinese patent CN102139234A discloses a kind of loaded catalyst for removing formaldehyde at room temperature.Its active component for gold,
The noble metal of one or more in palladium, platinum, rhodium, ruthenium.Bullion content accounts for the 0.1 ~ 2% of catalyst weight.Precious Metals Resources are dilute
Less and price is high, go to touch the promotion and application of formaldehyde which has limited greenhouse catalysis oxidation.
The content of the invention：
Present invention aim at the carbon monoxide-olefin polymeric preparation method and application for providing low concentration formaldehyde in a kind for the treatment of waste water.Have
In consideration of it, it is an object of the invention to solve above-mentioned technical problem present in prior art, there is provided a kind of easy and effective treatment
Carbon monoxide-olefin polymeric of formaldehyde in waste water and its preparation method and application.
To achieve the above object, the technical scheme is that:
The carbon monoxide-olefin polymeric of low concentration formaldehyde in a kind for the treatment of waste water, including composite oxides, it is characterised in that：Described institute
Composite oxides are stated for yttrium calcium manganese vanadium oxides composite, it is useless that the composite oxides can be catalyzed hydrogen peroxide oxidation degraded as catalyst
Formaldehyde in water.
The carbon monoxide-olefin polymeric preparation method of low concentration formaldehyde in a kind for the treatment of waste water, methods described follow these steps into
OK：With vanadic anhydride, yttrium nitrate, calcium nitrate, manganese nitrate and hydrogen peroxide as raw material, it is mixed and stirred at low temperature to dissolving,
Then evaporation drying, yttrium calcium manganese vanadium oxides composite powder is obtained by gained precipitation after calcining.The composite oxides that will be prepared
Powder is placed in aqueous slkali and heats, and then filters, and washing to pH value is drying after 6.9-7.2.
The mol ratio of described yttrium nitrate, calcium nitrate, manganese nitrate and vanadic anhydride is 13.1: 6.4：17.5:1.0,
The mass fraction of described hydrogen peroxide is 10%.
Described vanadic anhydride, yttrium nitrate, calcium nitrate, manganese nitrate and hydrogen peroxide raw material are in the frozen water that temperature is -5-0 DEG C
Stirring and dissolving in bath.
Described drying steps are the evaporation dryings in temperature is for 100-110 DEG C of boiling water bath.
Described calcining step is that dry sediment is put into Muffle furnace in 400 DEG C ~ 900 DEG C temperature lower calcination 6-8
Hour.
The aqueous slkali that described heating prepares used by gained yttrium calcium manganese vanadium oxides composite powder is NaOH, hydrogen
One kind or any several in potassium oxide, ammoniacal liquor, calcium hydroxide and barium hydroxide, the concentration of aqueous slkali is 0.1 ~ 10 mol/L,
Heating-up temperature is 50 ~ 100 °C, and the heat time is 5 ~ 24 hours.
The carbon monoxide-olefin polymeric application and preparation of low concentration formaldehyde in a kind for the treatment of waste water, it is characterised in that：By 0.5 ~ 4.0g/
The ratio of L waste water adds the yttrium calcium manganese vanadium oxides composite, and the addition of hydrogen peroxide is 2.0~23.0 g/L, normal in normal temperature
Pressure stir process 5-30 minutes.
The processing method that yttrium calcium manganese vanadium oxides composite catalyst of the invention is applied to formaldehyde waste water is：With combined oxidation
Thing is catalyst, and degradation conditions are：Concentration of formaldehyde is less than 5%, and every liter of catalyst amount of formaldehyde waste water for the treatment of is 0.5~
4.0g, waste water system is in normal temperature and pressure.In experiment, when formaldehyde waste water volume is 40mL, and concentration is 1.0%, add under agitation
Enter catalyst 0.1g, hydrogen peroxide 0.3g, catalytic degradation 10 minutes, the degradation rate of formaldehyde reaches more than 90%.Residual solution color is
It is colourless.Residual solution to replace with carry out catalyst again after new formalin recycled.Result shows that catalyst is
The degradation rate of the formaldehyde in secondary cycle, third time recycling all reaches more than 90.0%.
The positive effect of the present invention is
1st, method for preparing catalyst of the invention is simple, and raw materials are with low cost, easy to operate；
2nd, catalyst activity of the invention is high, can quick in the short period of time and efficient degradation pollutant；
3rd, can be carried out under method of wastewater treatment of the invention is in normal temperature and pressure and without illumination, technological process is simple, without two
Secondary pollution is produced, and the low feature of operating cost, there is actual application value very high；
4th, catalyst of the invention is reusable repeatedly.
Specific embodiment
Clear, complete description further is carried out to technical scheme with reference to embodiment.
Embodiment 1：
Weigh 0.16g（8.8×10-4mol）Vanadic anhydride in beaker, by it under the conditions of the ice-water bath that temperature is -5 DEG C
Add the 10% of 40ml hydrogen peroxide, 4.39g（1.15×10-2mol）Six water yttrium nitrates, 1.33g（5.63×10-3mol）Four water
Calcium nitrate and 5.51g（1.54×10-2mol）Manganese nitrate (50% solution), stirs to being completely dissolved, and is then 100 DEG C in temperature
At a temperature of evaporation drying, precipitation is transferred in Muffle furnace and is calcined.Calcining heat is 400 DEG C, and calcination time is 6 hours.Will system
Standby yttrium calcium manganese vanadium oxides composite powder is placed in 1 mol/L sodium hydroxide solutions and is heated 24 hours in the case where temperature is for 50 DEG C,
Then filter, washing to pH value is drying after 6.9.Taken out after cooling standby.
Take 0.1 gram of yttrium calcium manganese vanadium oxides composite catalyst for preparing as stated above and 0.3g hydrogen peroxide adds body
Product is 40mL, during concentration is 1.0% formaldehyde waste water, in normal temperature and pressure catalytic degradation formaldehyde 10 minutes under stirring.Then
It is centrifuged 10 minutes on centrifuge, takes supernatant measurement residual formaldehyde concentration.Result is as shown in table 1, when degradation time is 10 points
Zhong Shi, Degradation Formaldehyde rate is 88.33%.
The degradation rate of the degradation time of table 1 and formaldehyde in waste water
| The catalyst degradation time/min | 3 | 6 | 10 | 14 |
| Degradation Formaldehyde rate/% | 85.1 | 88.4 | 90.13 | 91.22 |
Embodiment 2
Weigh 0.16g（8.8×10-4mol）Vanadic anhydride in beaker, by it under the conditions of the ice-water bath that temperature is -2 DEG C
Add the 10% of 40ml hydrogen peroxide, 4.39g（1.15×10-2mol）Six water yttrium nitrates, 1.33g（5.63×10-3mol）Four water
Calcium nitrate and 5.51g（1.54×10-2mol）Manganese nitrate (50% solution), stirs to being completely dissolved, and is then 110 DEG C in temperature
At a temperature of evaporation drying, precipitation is transferred in Muffle furnace and is calcined.Calcining heat is 700 DEG C, and calcination time is 7 hours.Will system
Standby yttrium calcium manganese vanadium oxides composite powder is placed in 1 mol/L sodium hydroxide solutions and is heated 12 hours in the case where temperature is for 80 DEG C,
Then filter, washing to pH value is drying after 7.Taken out after cooling standby.
Take 0.1 gram of yttrium calcium manganese vanadium oxides composite catalyst for preparing as stated above and 0.3g hydrogen peroxide adds body
Product is 40mL, during concentration is 1.0% formaldehyde waste water, in normal temperature and pressure catalytic degradation formaldehyde 10 minutes under stirring.Then
It is centrifuged 10 minutes on centrifuge, takes supernatant measurement residual formaldehyde concentration.When degradation time is 10 minutes, Degradation Formaldehyde rate
It is 90.54%.
Embodiment 3
Weigh 0.16g（8.8×10-4mol）Vanadic anhydride adds it in beaker under the conditions of the ice-water bath that temperature is 0 DEG C
Enter the 10% of 40ml hydrogen peroxide, 4.39g（1.15×10-2mol）Six water yttrium nitrates, 1.33g（5.63×10-3mol）Four water nitre
Sour calcium and 5.51g（1.54×10-2mol）Manganese nitrate (50% solution), stirs to being completely dissolved, then in the temperature that temperature is 110 DEG C
The lower evaporation drying of degree, precipitation is transferred in Muffle furnace and is calcined.Calcining heat is 900 DEG C, and calcination time is 8 hours.To prepare
Yttrium calcium manganese vanadium oxides composite powder be placed in 1 mol/L sodium hydroxide solutions temperature be 100 DEG C at heat 5 hours, so
After filter, washing to pH value be 7.2 after dry.Taken out after cooling standby.
Take 0.1 gram of yttrium calcium manganese vanadium oxides composite catalyst for preparing as stated above and 0.3g hydrogen peroxide adds body
Product is 40mL, during concentration is 1.0% formaldehyde waste water, in normal temperature and pressure catalytic degradation formaldehyde 10 minutes under stirring.Then
It is centrifuged 10 minutes on centrifuge, takes supernatant measurement residual formaldehyde concentration.When degradation time is 10 minutes, Degradation Formaldehyde rate
It is 91.12%.
Embodiment 4
In order to investigate the recycling situation of catalyst, the yttrium calcium manganese vanadium that the preparation method of catalyst described in Example 2 is obtained
Composite oxides carry out continuous three catalyzing oxidizing degrading aldehyde tests, and each degradation time is 10 minutes.
Added by the yttrium calcium manganese vanadium combined oxidation of 0.10g in the beaker of the formalin that the concentration for filling 40mL is 1.0%
Thing catalyst and 0.3g hydrogen peroxide, under magnetic agitation effect, in normal temperature and pressure 10 points of catalytic degradation formaldehyde under stirring
Clock.Then it is centrifuged 10 minutes on centrifuge, takes supernatant measurement residual formaldehyde concentration.Supernatant after centrifugation is inhaled with dropper
Go out, leave behind catalyst solid part, 1.0% formalin for adding 40mL new supplements hydrogen peroxide, repeats above-mentioned degradation of formaldehyde
Process, so circulation carry out second circulation, third time cycle down solution aldehyde test, as a result as shown in table 2.
The catalyst of table 2 circulates degradation of formaldehyde
| Catalyst access times | 1 | 2 | 3 |
| Degradation Formaldehyde rate/% | 91.10 | 90.74 | 90.15 |
As can be seen from Table 2, all more than 90.0%, this shows yttrium calcium to the degradation rate of degradation of formaldehyde during catalyst is circulated at three times
Manganese vanadium oxides composite catalyst can circulating repetition use.
All features disclosed in this specification, or disclosed all preparation method and application, except mutually exclusive spy
Levy and/or step, beyond, can combine by any way.This specification（Including claim, summary）Disclosed in
Any feature, unless specifically stated otherwise, can alternative features equivalent by other or with similar purpose replaced.I.e. unless special
Do not describe, each feature is an example in a series of equivalent or similar characteristics.
The above is only the non-limiting implementation method of invention, substantial amounts of embodiment can also be derived, for this area
Those of ordinary skill for, do not departing from the invention design and on the premise of not making creative work, can also do
Go out some deformations and improved embodiment, these belong to protection scope of the present invention.
Claims (8)
1. a kind of carbon monoxide-olefin polymeric for processing low concentration formaldehyde in waste water, including composite oxides, it is characterised in that：Described
The composite oxides are yttrium calcium manganese vanadium oxides composite, and described yttrium calcium manganese vanadium oxides composite can be catalyzed double as catalyst
Formaldehyde in oxygen water oxygen degrading waste water.
2. it is a kind of process waste water in low concentration formaldehyde carbon monoxide-olefin polymeric preparation method, it is characterised in that：Methods described is pressed
Row step is carried out：With vanadic anhydride, yttrium nitrate, calcium nitrate, manganese nitrate and hydrogen peroxide as raw material, it is mixed and stirred at low temperature
To dissolving, then evaporation drying, yttrium calcium manganese vanadium oxides composite powder is obtained by gained precipitation after calcining, compound by what is prepared
Oxide powder is placed in aqueous slkali and heats, and then filters, and washing to pH value is drying after 6.9-7.2.
3. it is according to claim 2 treatment waste water in low concentration formaldehyde carbon monoxide-olefin polymeric preparation method and application, its
It is characterised by：The mol ratio of described yttrium nitrate, calcium nitrate, manganese nitrate and vanadic anhydride is 13.1: 6.4：17.5:
1.0, the mass fraction of described hydrogen peroxide is 10%.
4. it is according to claim 2 treatment waste water in low concentration formaldehyde carbon monoxide-olefin polymeric preparation method and application, its
It is characterised by：Described raw material stirring and dissolving in the ice-water bath that temperature is -5-0 DEG C.
5. it is according to claim 2 treatment waste water in low concentration formaldehyde carbon monoxide-olefin polymeric preparation method and application, its
It is characterised by：Described drying steps are the evaporation dryings in temperature is for 100-110 DEG C of boiling water bath.
6. it is according to claim 2 treatment waste water in low concentration formaldehyde carbon monoxide-olefin polymeric preparation method and application, its
It is characterised by：Described calcining step is that dry sediment is put into Muffle furnace in 400 DEG C ~ 900 DEG C temperature lower calcination 6-8
Hour.
7. it is according to claim 2 treatment waste water in low concentration formaldehyde carbon monoxide-olefin polymeric preparation method and application, its
It is characterised by：The aqueous slkali that described heating prepares used by gained yttrium calcium manganese vanadium oxides composite powder is NaOH,
One kind or any several in potassium hydroxide, ammoniacal liquor, calcium hydroxide and barium hydroxide, the concentration of aqueous slkali is 0.1 ~ 10 mol/
L, heating-up temperature is 50 ~ 100 °C, and the heat time is 5 ~ 24 hours.
8. it is a kind of process waste water in low concentration formaldehyde carbon monoxide-olefin polymeric application and preparation, it is characterised in that：By 0.5 ~ 4.0g/L
The ratio of waste water adds the yttrium calcium manganese vanadium oxides composite, and the addition of hydrogen peroxide is 2.0~23.0 g/L, in normal temperature and pressure
Lower stir process 5-30 minutes.
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| CN201611128373.2A CN106824172A (en) | 2016-12-09 | 2016-12-09 | The carbon monoxide-olefin polymeric preparation method and application of low concentration formaldehyde in treatment waste water |
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| CN201611128373.2A CN106824172A (en) | 2016-12-09 | 2016-12-09 | The carbon monoxide-olefin polymeric preparation method and application of low concentration formaldehyde in treatment waste water |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108144628A (en) * | 2017-12-25 | 2018-06-12 | 湖北工业大学 | A kind of preparation method and application for the carbon monoxide-olefin polymeric for handling formaldehyde in waste water |
| CN108246308A (en) * | 2017-12-25 | 2018-07-06 | 湖北工业大学 | A kind of preparation method and application for the carbon monoxide-olefin polymeric for handling low concentration formaldehyde |
| CN108295839A (en) * | 2017-12-25 | 2018-07-20 | 湖北工业大学 | The preparation method and application of the carbon monoxide-olefin polymeric of low concentration formaldehyde in degrading waste water |
| CN108295863A (en) * | 2017-12-25 | 2018-07-20 | 湖北工业大学 | A kind of preparation method and application of the carbon monoxide-olefin polymeric of processing formaldehyde |
| CN108355670A (en) * | 2017-12-25 | 2018-08-03 | 湖北工业大学 | A kind of preparation method and application of the carbon monoxide-olefin polymeric of degradation low concentration formaldehyde |
| CN112546853A (en) * | 2020-11-18 | 2021-03-26 | 西安热工研究院有限公司 | Preparation method of low-temperature denitration filter bag |
| CN112774698A (en) * | 2021-03-02 | 2021-05-11 | 上海玉畔环保科技有限公司 | Catalyst for promoting formaldehyde in wastewater to be oxidized and preparation method thereof |
| WO2024027077A1 (en) * | 2022-08-04 | 2024-02-08 | 上海纳米技术及应用国家工程研究中心有限公司 | Method for using ammonia water to accelerate catalytic decomposition of formaldehyde by means of manganese-based catalyst |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108144628A (en) * | 2017-12-25 | 2018-06-12 | 湖北工业大学 | A kind of preparation method and application for the carbon monoxide-olefin polymeric for handling formaldehyde in waste water |
| CN108246308A (en) * | 2017-12-25 | 2018-07-06 | 湖北工业大学 | A kind of preparation method and application for the carbon monoxide-olefin polymeric for handling low concentration formaldehyde |
| CN108295839A (en) * | 2017-12-25 | 2018-07-20 | 湖北工业大学 | The preparation method and application of the carbon monoxide-olefin polymeric of low concentration formaldehyde in degrading waste water |
| CN108295863A (en) * | 2017-12-25 | 2018-07-20 | 湖北工业大学 | A kind of preparation method and application of the carbon monoxide-olefin polymeric of processing formaldehyde |
| CN108355670A (en) * | 2017-12-25 | 2018-08-03 | 湖北工业大学 | A kind of preparation method and application of the carbon monoxide-olefin polymeric of degradation low concentration formaldehyde |
| CN108295839B (en) * | 2017-12-25 | 2020-09-11 | 湖北工业大学 | Preparation method and application of catalyst composition for degrading low-concentration formaldehyde in wastewater |
| CN108246308B (en) * | 2017-12-25 | 2020-11-06 | 湖北工业大学 | Preparation method and application of catalyst composition for treating low-concentration formaldehyde |
| CN108355670B (en) * | 2017-12-25 | 2020-11-06 | 湖北工业大学 | Preparation method and application of catalyst composition for degrading low-concentration formaldehyde |
| CN112546853A (en) * | 2020-11-18 | 2021-03-26 | 西安热工研究院有限公司 | Preparation method of low-temperature denitration filter bag |
| CN112774698A (en) * | 2021-03-02 | 2021-05-11 | 上海玉畔环保科技有限公司 | Catalyst for promoting formaldehyde in wastewater to be oxidized and preparation method thereof |
| WO2024027077A1 (en) * | 2022-08-04 | 2024-02-08 | 上海纳米技术及应用国家工程研究中心有限公司 | Method for using ammonia water to accelerate catalytic decomposition of formaldehyde by means of manganese-based catalyst |
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Application publication date: 20170613 |