CN105502544A - Defoaming agent for boiler water treatment and preparation method thereof - Google Patents
Defoaming agent for boiler water treatment and preparation method thereof Download PDFInfo
- Publication number
- CN105502544A CN105502544A CN201510940327.1A CN201510940327A CN105502544A CN 105502544 A CN105502544 A CN 105502544A CN 201510940327 A CN201510940327 A CN 201510940327A CN 105502544 A CN105502544 A CN 105502544A
- Authority
- CN
- China
- Prior art keywords
- parts
- boiler water
- defoamer
- water processing
- preparation
- 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
-
- 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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/12—Prevention of foaming
Abstract
The invention relates to a defoaming agent for boiler water treatment and a preparation method thereof. The defoaming agent is prepared from, by mass, 3-9 parts of polypropylene glycol stearate, 75-95 parts of epoxy ethane, 2-7 parts of epoxy chloropropane, 0.5-2.1 parts of isopropyl alcohol, 1.5-4.5 parts of stearic acid, 6-13 parts of triethanolamine oleic acid soap, 0.2-0.6 part of sodium silicate, 0.2-0.5 part of didecyl dimethyl ammonium chloride, 0.6-1.5 parts of iso-tridecanol polyoxyethylene ether, 0.05-0.15 part of ammonium hydrogen fluoride, 0.4-1 part of sodium alginate, 0.2-0.6 part of manganous dihydrogen phosphate and 0.1-0.5 part of copper carbonate. The defoaming agent has excellent defoaming and foam-inhibiting effects and can effectively eliminate and inhibit foam during boiler water treatment. In addition, the defoaming agent also has rust removal, scale inhibition and corrosion mitigation effects and can be used as an adjuvant for boiler water treatment.
Description
Technical field
The present invention relates to water-treatment technology field, particularly relate to a kind of boiler water processing defoamer and preparation method thereof.
Background technology
Boiler can safely, economic, reliable and steady running, and the qualified steam of output or hot water, be familiar with boiler feed water, understand poor water quality to the harm of boiler, grasp water, vapour quality standard, chemical treatment in the stove performing boiler feed water process and necessity, and be in operation strictly by standard-required supervision water, vapour quality is extremely important to guarantee that the water quality of boiler and steam quality and safe and economical boiler are run.Water treating agent for boilers generally has the effects such as scale removal, inhibition, cleaning.In the process of boiler water processing, a large amount of foam can be produced, have impact on treatment effect and processing speed.
Seldom there is boiler water processing defoamer on the market at present, the foam that existing defoamer can not well produce in boiler water processing process always, and not there is the effect of rust cleaning, scale inhibition and inhibition yet.
Summary of the invention
the technical problem solved:for existing boiler water processing defoamer shortage and not there is the shortcoming of rust cleaning, scale inhibition and corrosion inhibition, the invention provides a kind of boiler water processing defoamer and preparation method thereof.
technical scheme:a kind of boiler water processing defoamer, in mass parts containing following composition: polypropylene glycol stearate 3 ~ 9 parts, 75 ~ 95 parts, oxyethane, epoxy chloropropane 2 ~ 7 parts, Virahol 0.5 ~ 2.1 part, stearic acid 1.5 ~ 4.5 parts, trihydroxy ethylamine oleate soap 6 ~ 13 parts, water glass 0.2 ~ 0.6 part, Timbercote 2000 0.2 ~ 0.5 part, isomery ammonium trideceth 0.6 ~ 1.5 part, ammonium bifluoride 0.05 ~ 0.15 part, Sodium Alginate 0.4 ~ 1 part, phosphate dihydrogen manganese 0.2 ~ 0.6 part, copper carbonate 0.1 ~ 0.5 part.
A kind of boiler water processing defoamer described above, in mass parts containing following composition: polypropylene glycol stearate 4 ~ 8 parts, 80 ~ 90 parts, oxyethane, epoxy chloropropane 3 ~ 6 parts, Virahol 0.8 ~ 1.8 part, stearic acid 2 ~ 4 parts, trihydroxy ethylamine oleate soap 7 ~ 12 parts, water glass 0.3 ~ 0.5 part, Timbercote 2000 0.3 ~ 0.45 part, isomery ammonium trideceth 0.8 ~ 1.3 part, ammonium bifluoride 0.08 ~ 0.12 part, Sodium Alginate 0.5 ~ 0.9 part, phosphate dihydrogen manganese 0.3 ~ 0.5 part, copper carbonate 0.2 ~ 0.4 part.
A kind of boiler water processing defoamer described above, in mass parts containing following composition: polypropylene glycol stearate 5 parts, 83 parts, oxyethane, epoxy chloropropane 4 parts, Virahol 1 part, stearic acid 2.5 parts, trihydroxy ethylamine oleate soap 8 parts, water glass 0.35 part, Timbercote 2000 0.35 part, isomery ammonium trideceth 1 part, ammonium bifluoride 0.09 part, Sodium Alginate 0.6 part, phosphate dihydrogen manganese 0.35 part, copper carbonate 0.25 part.
A kind of boiler water processing defoamer described above, in mass parts containing following composition: polypropylene glycol stearate 6 parts, 85 parts, oxyethane, epoxy chloropropane 4.5 parts, Virahol 1.3 parts, stearic acid 3 parts, trihydroxy ethylamine oleate soap 9.5 parts, water glass 0.4 part, Timbercote 2000 0.38 part, isomery ammonium trideceth 1.1 parts, ammonium bifluoride 0.1 part, Sodium Alginate 0.7 part, phosphate dihydrogen manganese 0.4 part, copper carbonate 0.3 part.
The preparation method of a kind of boiler water processing defoamer described above, the step of this preparation method is as follows:
The first step: add in reactor by polypropylene glycol stearate, oxyethane, epoxy chloropropane, Virahol, stearic acid, trihydroxy ethylamine oleate soap, water glass, mixes at temperature is 50 ~ 70 DEG C;
Second step: again Timbercote 2000, isomery ammonium trideceth, ammonium bifluoride, Sodium Alginate, phosphate dihydrogen manganese, copper carbonate are added in reactor, be warming up to 60 ~ 80 DEG C, be uniformly mixed;
3rd step: reactor is cooled to 30 ~ 50 DEG C, namely discharging obtains boiler water processing defoamer.
Mix at temperature is 60 DEG C in the first step described above.
70 DEG C are warming up in second step described above.
In the 3rd step described above, reactor is cooled to 40 DEG C.
beneficial effect:a kind of boiler water processing defoamer provided by the invention and preparation method thereof, the froth breaking that this defoamer has excellence presses down bubble effect, can effectively steep with pressing down by froth breaking when processing feedwater; Meanwhile, this defoamer also has the effect of rust cleaning, scale inhibition and inhibition, can use as the auxiliary of boiler water processing.
Embodiment
embodiment 1
A kind of boiler water processing defoamer, in mass parts containing following composition: polypropylene glycol stearate 3 parts, 75 parts, oxyethane, epoxy chloropropane 2 parts, Virahol 0.5 part, stearic acid 1.5 parts, trihydroxy ethylamine oleate soap 6 parts, water glass 0.2 part, Timbercote 2000 0.2 part, isomery ammonium trideceth 0.6 part, ammonium bifluoride 0.05 part, Sodium Alginate 0.4 part, phosphate dihydrogen manganese 0.2 part, copper carbonate 0.1 part.
A preparation method for boiler water processing defoamer, the step of this preparation method is as follows:
The first step: add in reactor by polypropylene glycol stearate, oxyethane, epoxy chloropropane, Virahol, stearic acid, trihydroxy ethylamine oleate soap, water glass, mixes at temperature is 50 DEG C;
Second step: again Timbercote 2000, isomery ammonium trideceth, ammonium bifluoride, Sodium Alginate, phosphate dihydrogen manganese, copper carbonate are added in reactor, be warming up to 60 DEG C, be uniformly mixed;
3rd step: reactor is cooled to 30 DEG C, namely discharging obtains boiler water processing defoamer.
embodiment 2
A kind of boiler water processing defoamer, in mass parts containing following composition: polypropylene glycol stearate 9 parts, 95 parts, oxyethane, epoxy chloropropane 7 parts, Virahol 2.1 parts, stearic acid 4.5 parts, trihydroxy ethylamine oleate soap 13 parts, water glass 0.6 part, Timbercote 2000 0.5 part, isomery ammonium trideceth 1.5 parts, ammonium bifluoride 0.15 part, Sodium Alginate 1 part, phosphate dihydrogen manganese 0.6 part, copper carbonate 0.5 part.
A preparation method for boiler water processing defoamer, the step of this preparation method is as follows:
The first step: add in reactor by polypropylene glycol stearate, oxyethane, epoxy chloropropane, Virahol, stearic acid, trihydroxy ethylamine oleate soap, water glass, mixes at temperature is 70 DEG C;
Second step: again Timbercote 2000, isomery ammonium trideceth, ammonium bifluoride, Sodium Alginate, phosphate dihydrogen manganese, copper carbonate are added in reactor, be warming up to 80 DEG C, be uniformly mixed;
3rd step: reactor is cooled to 50 DEG C, namely discharging obtains boiler water processing defoamer.
embodiment 3
A kind of boiler water processing defoamer, in mass parts containing following composition: polypropylene glycol stearate 8 parts, 90 parts, oxyethane, epoxy chloropropane 6 parts, Virahol 1.8 parts, stearic acid 4 parts, trihydroxy ethylamine oleate soap 12 parts, water glass 0.5 part, Timbercote 2000 0.45 part, isomery ammonium trideceth 1.3 parts, ammonium bifluoride 0.12 part, Sodium Alginate 0.9 part, phosphate dihydrogen manganese 0.5 part, copper carbonate 0.4 part.
A preparation method for boiler water processing defoamer, the step of this preparation method is as follows:
The first step: add in reactor by polypropylene glycol stearate, oxyethane, epoxy chloropropane, Virahol, stearic acid, trihydroxy ethylamine oleate soap, water glass, mixes at temperature is 60 DEG C;
Second step: again Timbercote 2000, isomery ammonium trideceth, ammonium bifluoride, Sodium Alginate, phosphate dihydrogen manganese, copper carbonate are added in reactor, be warming up to 70 DEG C, be uniformly mixed;
3rd step: reactor is cooled to 40 DEG C, namely discharging obtains boiler water processing defoamer.
embodiment 4
A kind of boiler water processing defoamer, in mass parts containing following composition: polypropylene glycol stearate 5 parts, 83 parts, oxyethane, epoxy chloropropane 4 parts, Virahol 1 part, stearic acid 2.5 parts, trihydroxy ethylamine oleate soap 8 parts, water glass 0.35 part, Timbercote 2000 0.35 part, isomery ammonium trideceth 1 part, ammonium bifluoride 0.09 part, Sodium Alginate 0.6 part, phosphate dihydrogen manganese 0.35 part, copper carbonate 0.25 part.
A preparation method for boiler water processing defoamer, the step of this preparation method is as follows:
The first step: add in reactor by polypropylene glycol stearate, oxyethane, epoxy chloropropane, Virahol, stearic acid, trihydroxy ethylamine oleate soap, water glass, mixes at temperature is 60 DEG C;
Second step: again Timbercote 2000, isomery ammonium trideceth, ammonium bifluoride, Sodium Alginate, phosphate dihydrogen manganese, copper carbonate are added in reactor, be warming up to 70 DEG C, be uniformly mixed;
3rd step: reactor is cooled to 40 DEG C, namely discharging obtains boiler water processing defoamer.
embodiment 5
A kind of boiler water processing defoamer, in mass parts containing following composition: polypropylene glycol stearate 6 parts, 85 parts, oxyethane, epoxy chloropropane 4.5 parts, Virahol 1.3 parts, stearic acid 3 parts, trihydroxy ethylamine oleate soap 9.5 parts, water glass 0.4 part, Timbercote 2000 0.38 part, isomery ammonium trideceth 1.1 parts, ammonium bifluoride 0.1 part, Sodium Alginate 0.7 part, phosphate dihydrogen manganese 0.4 part, copper carbonate 0.3 part.
A preparation method for boiler water processing defoamer, the step of this preparation method is as follows:
The first step: add in reactor by polypropylene glycol stearate, oxyethane, epoxy chloropropane, Virahol, stearic acid, trihydroxy ethylamine oleate soap, water glass, mixes at temperature is 60 DEG C;
Second step: again Timbercote 2000, isomery ammonium trideceth, ammonium bifluoride, Sodium Alginate, phosphate dihydrogen manganese, copper carbonate are added in reactor, be warming up to 70 DEG C, be uniformly mixed;
3rd step: reactor is cooled to 40 DEG C, namely discharging obtains boiler water processing defoamer.
comparative example 1
Patent of invention publication number be CN103877754A patent discloses a kind of fatty acid defoamer, be made up of the raw material of following parts by weight: 100 parts, lipid acid, polymethyl siloxane 10 parts, polyether-type fatty acid ester 8 parts, propyl alcohol 6 parts, oxidic polyethylene 10 parts, ethylenedistearamide 40 parts, silica 11 part, calcium stearate 15 parts, 9 parts, sodium carbonate.
Preparation method of the present invention:
(1) by 100 parts, lipid acid, polymethyl siloxane 10 parts, polyether-type fatty acid ester 8 parts adds in reaction vessel, temperature is brought up to 40 DEG C, starts agitator and stir with the rotating speed of 40 revs/min, add propyl alcohol 6 parts slowly, oxidic polyethylene 10 parts, stir, add ethylenedistearamide 40 parts, continue to stir insulation reaction 1.5 hours;
(2) add silica 11 part, calcium stearate 15 parts, continue to stir insulation reaction 1.3 hours;
(3) be cooled to normal temperature, 9 parts, sodium carbonate is added, continue stirring reaction and obtain finished product after 30 minutes.
The technical performance index of the defoamer of above-described embodiment 1 ~ embodiment 5 and comparative example 1, its detected result is as follows:
Above the embodiment of the present invention is described in detail, for one of ordinary skill in the art, according to the thought of the embodiment of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (8)
1. a boiler water processing defoamer, to it is characterized in that in mass parts containing following composition: polypropylene glycol stearate 3 ~ 9 parts, 75 ~ 95 parts, oxyethane, epoxy chloropropane 2 ~ 7 parts, Virahol 0.5 ~ 2.1 part, stearic acid 1.5 ~ 4.5 parts, trihydroxy ethylamine oleate soap 6 ~ 13 parts, water glass 0.2 ~ 0.6 part, Timbercote 2000 0.2 ~ 0.5 part, isomery ammonium trideceth 0.6 ~ 1.5 part, ammonium bifluoride 0.05 ~ 0.15 part, Sodium Alginate 0.4 ~ 1 part, phosphate dihydrogen manganese 0.2 ~ 0.6 part, copper carbonate 0.1 ~ 0.5 part.
2. a kind of boiler water processing defoamer according to claim 1, to it is characterized in that in mass parts containing following composition: polypropylene glycol stearate 4 ~ 8 parts, 80 ~ 90 parts, oxyethane, epoxy chloropropane 3 ~ 6 parts, Virahol 0.8 ~ 1.8 part, stearic acid 2 ~ 4 parts, trihydroxy ethylamine oleate soap 7 ~ 12 parts, water glass 0.3 ~ 0.5 part, Timbercote 2000 0.3 ~ 0.45 part, isomery ammonium trideceth 0.8 ~ 1.3 part, ammonium bifluoride 0.08 ~ 0.12 part, Sodium Alginate 0.5 ~ 0.9 part, phosphate dihydrogen manganese 0.3 ~ 0.5 part, copper carbonate 0.2 ~ 0.4 part.
3. a kind of boiler water processing defoamer according to claim 1, to is characterized in that in mass parts containing following composition: polypropylene glycol stearate 5 parts, 83 parts, oxyethane, epoxy chloropropane 4 parts, Virahol 1 part, stearic acid 2.5 parts, trihydroxy ethylamine oleate soap 8 parts, water glass 0.35 part, Timbercote 2000 0.35 part, isomery ammonium trideceth 1 part, ammonium bifluoride 0.09 part, Sodium Alginate 0.6 part, phosphate dihydrogen manganese 0.35 part, copper carbonate 0.25 part.
4. a kind of boiler water processing defoamer according to claim 1, to is characterized in that in mass parts containing following composition: polypropylene glycol stearate 6 parts, 85 parts, oxyethane, epoxy chloropropane 4.5 parts, Virahol 1.3 parts, stearic acid 3 parts, trihydroxy ethylamine oleate soap 9.5 parts, water glass 0.4 part, Timbercote 2000 0.38 part, isomery ammonium trideceth 1.1 parts, ammonium bifluoride 0.1 part, Sodium Alginate 0.7 part, phosphate dihydrogen manganese 0.4 part, copper carbonate 0.3 part.
5. the preparation method of a kind of boiler water processing defoamer according to claim 1, is characterized in that the step of this preparation method is as follows:
The first step: add in reactor by polypropylene glycol stearate, oxyethane, epoxy chloropropane, Virahol, stearic acid, trihydroxy ethylamine oleate soap, water glass, mixes at temperature is 50 ~ 70 DEG C;
Second step: again Timbercote 2000, isomery ammonium trideceth, ammonium bifluoride, Sodium Alginate, phosphate dihydrogen manganese, copper carbonate are added in reactor, be warming up to 60 ~ 80 DEG C, be uniformly mixed;
3rd step: reactor is cooled to 30 ~ 50 DEG C, namely discharging obtains boiler water processing defoamer.
6. the preparation method of a kind of boiler water processing defoamer according to claim 5, is characterized in that: mix at temperature is 60 DEG C in the described the first step.
7. the preparation method of a kind of boiler water processing defoamer according to claim 5, is characterized in that: be warming up to 70 DEG C in described second step.
8. the preparation method of a kind of boiler water processing defoamer according to claim 5, is characterized in that: in described 3rd step, reactor is cooled to 40 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510940327.1A CN105502544A (en) | 2015-12-16 | 2015-12-16 | Defoaming agent for boiler water treatment and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510940327.1A CN105502544A (en) | 2015-12-16 | 2015-12-16 | Defoaming agent for boiler water treatment and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105502544A true CN105502544A (en) | 2016-04-20 |
Family
ID=55710930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510940327.1A Pending CN105502544A (en) | 2015-12-16 | 2015-12-16 | Defoaming agent for boiler water treatment and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105502544A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106196899A (en) * | 2016-06-30 | 2016-12-07 | 安徽省含山县锦华氧化锌厂 | A kind of solid defoaming agent and preparation method thereof |
| CN111945015A (en) * | 2020-07-08 | 2020-11-17 | 江苏海云花新材料有限公司 | Non-weight loss clay refining agent |
| CN112028266A (en) * | 2019-06-04 | 2020-12-04 | 福州源洁环保科技有限公司 | Boiler water treatment agent and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102398952A (en) * | 2010-09-13 | 2012-04-04 | 石爱萍 | Composite water anti-foaming agent |
| CN103484884A (en) * | 2013-09-13 | 2014-01-01 | 武汉玻尔科技股份有限公司 | Low-foam middle-cloud-point environment-friendly water base metal cleaner composition and preparing method thereof |
-
2015
- 2015-12-16 CN CN201510940327.1A patent/CN105502544A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102398952A (en) * | 2010-09-13 | 2012-04-04 | 石爱萍 | Composite water anti-foaming agent |
| CN103484884A (en) * | 2013-09-13 | 2014-01-01 | 武汉玻尔科技股份有限公司 | Low-foam middle-cloud-point environment-friendly water base metal cleaner composition and preparing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 天津市化工研究院: "工业循环冷却水消泡剂", 《工业用水与废水》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106196899A (en) * | 2016-06-30 | 2016-12-07 | 安徽省含山县锦华氧化锌厂 | A kind of solid defoaming agent and preparation method thereof |
| CN112028266A (en) * | 2019-06-04 | 2020-12-04 | 福州源洁环保科技有限公司 | Boiler water treatment agent and preparation method thereof |
| CN111945015A (en) * | 2020-07-08 | 2020-11-17 | 江苏海云花新材料有限公司 | Non-weight loss clay refining agent |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105502544A (en) | Defoaming agent for boiler water treatment and preparation method thereof | |
| CN102212412A (en) | Water-based cutting fluid with grinding materials treated by surfactant and preparation method thereof | |
| TW200725726A (en) | Process for producing silicon wafer | |
| CN102976429B (en) | Defoaming agent for sewage treatment and preparation method thereof | |
| CN106590904B (en) | A kind of Buddha's warrior attendant wire cutting mono-/multi- crystalline silicon rod coolant liquid | |
| CN106119873B (en) | A kind of die-cast aluminium shell cleaning showers agent applied under super-pressure | |
| CN104031620A (en) | Anti-boiling, anti-scale and anti-freeze solution and preparation method thereof | |
| CN102513218A (en) | Preparation method for trapping agent for bauxite flotation | |
| US3208972A (en) | Method of making finely divided monomethylsiloxane | |
| CN102367576B (en) | EDTA (Ethylene Diamine Tetraacetic Acid) low-temperature cleaning aid and application thereof | |
| CN103864232A (en) | General corrosion and scale inhibitor for purifying circulating water and preparation and application thereof | |
| CN113582838A (en) | Tetrahydroxy sodium stearate and preparation method and application thereof | |
| CN101177272B (en) | Method for deeply removing aluminium from industrial high-silica sand | |
| CN102978634A (en) | Environment-friendly spraying type normal-temperature efficient water-based degreasing agent and preparation method | |
| CN104060468B (en) | A kind of wet spinning acrylic fiber oil preparation and preparation method thereof | |
| CN110684610B (en) | Powdery washing powder defoaming agent and preparation method thereof | |
| CN108893747B (en) | Plane grinding cleaning agent and preparation method thereof | |
| CN102241401B (en) | Separation method of quartz and silicon material in single crystal silicon crucible backing material | |
| CN103170165B (en) | Preparation method of organic silicon antifoaming agent | |
| CN103803717B (en) | A kind of middle water is back to the method for recirculating cooling water system | |
| CN104526294A (en) | Preparation method of end milling cutter | |
| CN103351928B (en) | A kind of stainless steel wire drawing liquid composition and preparation method thereof | |
| CN104130715B (en) | A kind of polishing fluid for tungsten in semiconductor integrated circuit and preparation method thereof | |
| CN106396144A (en) | A water stabilizing agent for middle- and low-pressure steam boilers | |
| CN103224516A (en) | Synthesis method of trioctyl phosphate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into 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: 20160420 |