CN102145943A - Distillation sea water desalinating scale inhibition and dispersion agent and preparation method thereof - Google Patents
Distillation sea water desalinating scale inhibition and dispersion agent and preparation method thereof Download PDFInfo
- Publication number
- CN102145943A CN102145943A CN2010102818312A CN201010281831A CN102145943A CN 102145943 A CN102145943 A CN 102145943A CN 2010102818312 A CN2010102818312 A CN 2010102818312A CN 201010281831 A CN201010281831 A CN 201010281831A CN 102145943 A CN102145943 A CN 102145943A
- Authority
- CN
- China
- Prior art keywords
- weight
- sea water
- acid
- distillation sea
- content
- 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
Landscapes
- Detergent Compositions (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
The invention discloses distillation sea water desalinating scale inhibition and dispersion agent and a preparation method thereof and belongs to the technical field of water treatment. The distillation sea water desalinating scale inhibition and dispersion agent comprises the following components in percentage by weight: 20 percent to 50 percent of polyamino polyether methylene phosphonate, 13 percent to 35 percent of high efficiency dispersing agent, 5 percent to 10 percent of organic phosphonic acid (organic phosphonate) and 3 percent to 5 percent of alkaline agent. The preparation method of the distillation sea water desalinating scale inhibition and dispersion agent comprises the following steps of: mixing polyamino polyether methylene phosphonate, the high efficiency dispersing agent and the organic phosphonic acid (the organic phosphonate) according to the proportioning ratio; adding proper amount of water; heating the mixture to the temperature of 30 to 50 DEG C and carrying out heat preservation; after stirring for 1 to 2 hours, standing and cooling to the temperature of 20 to 30 DEG C; adding the alkaline agent with the corresponding proportion; stirring the mixture for 20 to 40 minutes; and filtering to obtain the distillation sea water desalinating scale inhibition and dispersion agent. The distillation sea water desalinating scale inhibition and dispersion agent respectively has scale inhibition rates of 88.97 percent, 90.93 percent and 95.73 percent on CaCO3 scales, Mg(OH)2 scales and CaSO4 scales and has good scale inhibition effect.
Description
Technical field
The present invention relates to a kind of dirt dispersion agent and preparation method thereof, relate in particular to a kind of dirt dispersion agent that distillation sea water desalting uses and preparation method thereof that is used for; Relate to water treatment field and be primarily aimed at sea water desaltination, also comprise petrochemical complex, iron and steel electric power, industrial circulating cooling water, oiler feed etc.
Background technology
The development sea water desaltination is the important channel that solves shortage of water resources.Current desalination technology mainly contains distillation method and two kinds of leading technologies of embrane method; distillation method because of its production water quality purity height, do not need complicated sea water preprocessing, can adapt to advantages such as various sea conditions, installation and operation is easy to maintenance, the mass-producing water producing cost is low and more and more entering Chinese sea water desaltination market, the development that the progress of propelling desalination techniques and seawater fully utilize.In distillation sea water desalting technology,, cause the scale formation on the metal heat transfer pipe because a large amount of dirt precipitations must appear in the characteristic of seawater itself and still-process.The appearance of this phenomenon directly causes the decline of energy utilization rate and the rising of clean and maintenance cost, thereby in the energy consumption waste, the comprehensive cost of water treatment also rises thereupon.Common method is added dirt dispersion agent exactly, and this has important effect to keeping the stable operation of equipment long-term safety.
The two large problems that distillation sea water desalting faces in actual applications comprises the corrosion and the fouling of seawater on water distribution system, heat-transfer pipe of equipment.As requisite dirt dispersion agent in the desalination process, be the long-term consumption-type chemical of production process.It accounts for 10%～15% on ton water comprehensive cost price, be one of important factor that influences the sea water desaltination cost.Existing water treatment scale agent spininess does not almost have moulding product to can be used for distillation sea water desalting to recirculated cooling water and reverse osmosis system.
Summary of the invention
Based on the problems referred to above, the object of the invention is to provide the technical scheme of a kind of high efficiency dirt dispersion agent at distillation sea water desalting and preparation method thereof.
Described distillation sea water desalting dirt dispersion agent contains the polyamino polyether base methylenephosphonic acid of 20%-50% (weight), the dispersant with high efficiency of 13%-35% (weight), 5%-10% (weight) organic phospho acid (salt), 3%-5% (weight) alkaline agent.
Described distillation sea water desalting dirt dispersion agent contains: the content of polyamino polyether base methylenephosphonic acid is 20%-40% (weight), the content of dispersant with high efficiency is 13%-30% (weight), the content of organic phospho acid (salt) is 5%-9% (weight), and the content of alkaline agent is 3%-4.5% (weight).
Described distillation sea water desalting dirt dispersion agent contains: the content of polyamino polyether base methylenephosphonic acid is 30%-40% (weight), the content of dispersant with high efficiency is 20%-30% (weight), the content of organic phospho acid (salt) is 6%-9% (weight), and the content of alkaline agent is 3.5%-4.5% (weight).
Described distillation sea water desalting dirt dispersion agent contains: the content of polyamino polyether base methylenephosphonic acid is 30%-35% (weight), the content of dispersant with high efficiency is 20%-35% (weight), the content of organic phospho acid (salt) is 6%-8% (weight), and the content of alkaline agent is 3.5%-4% (weight).
Described distillation sea water desalting dirt dispersion agent, wherein, described polyamino polyether base methylenephosphonic acid is the compound as general formula 1 expression, [general formula 1]
N is an integer in the formula, and mean value is 5 to 15, and M is hydrogen or suitable positively charged ion, each R group can be identical also can be different, be hydrogen or methyl.
Described distillation sea water desalting dirt dispersion agent, wherein, described dispersant with high efficiency is one or more the mixture in vinylformic acid-acrylate-phosphonic acids-sulfonate tetrapolymer, vinylformic acid-acrylate-sulfonate terpolymer, vinylformic acid-maleic acid, the hydrolytic polymaleic anhydride.
Described distillation sea water desalting dirt dispersion agent, wherein, described organic phospho acid (salt) is one or more the mixture in ethylene diamine tetra methylene phosphonic acid salt, Amino Trimethylene Phosphonic Acid salt, the Amino Trimethylene Phosphonic Acid.
Described distillation sea water desalting dirt dispersion agent, wherein, described alkaline agent is selected NaOH for use.
The preparation method of described distillation sea water desalting dirt dispersion agent, may further comprise the steps: mix polyamino polyether base methylenephosphonic acid, dispersant with high efficiency, organic phospho acid (salt) by its proportioning, add an amount of water, be heated to 30-50 ℃ of insulation, stir after 1-2 hour, leave standstill and be cooled to 20-30 ℃, add the alkaline agent of corresponding proportioning, stirred 20-40 minute, and filtered promptly.
The preparation method of described distillation sea water desalting dirt dispersion agent wherein, adds an amount of water, is heated to 40 ℃ of insulations, stirs after 1-2 hour, leaves standstill and is cooled to 25 ℃, adds the alkaline agent of corresponding proportioning, stirs 30 minutes.
Polyamino polyether base methylenephosphonic acid in the described distillation sea water desalting dirt dispersion agent, have good calcium tolerance and scale inhibition and dispersion performance, metal ion also there is good dissemination, and can effectively control the formation of foundry loam, magne-scale and silicon dirt, and compatibility is good, and it can effectively suppress separating out and precipitating of the easy scale forming matter of indissoluble in the water such as lime carbonate, calcium sulfate, magnesium hydroxide, calcium phosphate, barium sulfate, Strontium Sulphate etc. as host is composite.
Because product of the present invention contains phosphonate group, sulfonic group multipolymer and maleic acid etc. in forming, and has comprised phosphonate group :-PO (OH), sulfonic group :-SO3, and the characteristic of the multiple class of many structures functional group such as carboxylic acid group-COOH.Therefore, its scale inhibition and dispersion had both embodied the characteristic of organic phospho acid, had the characteristics of poly carboxylic acid again simultaneously.The mechanism of action to product of the present invention, can comprehensively become to be grouped into group, do the explanation of following five aspects: one, chelating solublization, ionization takes place in the water-soluble back of this product, generate the molecular chain of electronegative property, it and Ca2+ form water-soluble complex compound or inner complex, thereby inorganic salt solubleness is increased, and play scale effect; Two, electrostatic repulsion effect is adsorbed on the crystallite of inorganic salt after this product is water-soluble, makes repulsion increase between particulate, hinders their coalescent, makes them be in good dispersion state, thereby prevents or reduce the formation of dirty thing; Three, low dosage effect, the reason that produces this phenomenon is that the negatively charged ion of multipolymer and cationic sequestering action are not to be undertaken by stoichiometric ratio; When a large amount of lime carbonate is arranged in the solution, when the calcium sulfate small-crystalline exists, these small-crystallines can increase interfacial energy by a certain amount of phosphonate group and sulfonic group analog copolymer of containing of physics or chemical action absorption greatly; According to gibbs one Thomson theory, interfacial energy is high more, and the crystalline critical radius is big more, and it is difficult more to separate out these small-crystallines from water; Like this, do not adding when containing phosphonate group and sulfonic group analog copolymer, be easy to separate out the supersaturated solution of lime carbonate, calcium sulfate, after adding medicament, interfacial energy increases, and makes and does not separate out these crystallites in the water; Therefore, a spot ofly contain phosphonate group and the sulfonic group analog copolymer just can be stabilized in a large amount of Ca2+ in the water; And, show scale inhibition performance and increase thereupon within the specific limits along with the increase that contains phosphonate group and sulfonic group analog copolymer consumption; (4) lattice distortion effect contains the phosphono and sulfonic base co-polymer and is adsorbed on inorganic salt nucleus or the crystallite, and occupied certain position and hindered and destroyed inorganic salt crystalline normal growth, the crystalline rate of rise that slowed down, thus reduced the formation of salt crust; (5) throwing out, after this product added in the entry, macromolecular chain was unfolded in water, was with numerous negative charge group absorption lime carbonate and the trickle crystal grain of calcium sulfate on the molecular chain, formed soft particle, was suspended in the water, stoped the formation of dirt.
Described dirt dispersion agent, not only have scale inhibition performance and dispersiveness efficiently, to the CaCO3 dirt, Mg (OH) 2, the scale inhibition performance of CaSO4 can be up to 88.97%, 90.93% and 95.73%, to the carbonate dirt, the Sulfates dirt has very strong complexing solublization, can prevent that incrustation scale from separating out at heat exchange surface, and have 130 ℃ with interior thermostability, and applicable pH range is wide, generally can be used in the scope of 2.5-11, and scale inhibition effect is obvious in the scope of 4.5-9.5, need not the extra acid of adding, energy and defoamer compatibility, dosage is low, and actual nontoxic, sea environment-friendly is good.Described dirt dispersion agent not only can be used for distillation sea water desalting, also is applied to processes such as petrochemical complex, iron and steel electric power, industrial circulating cooling water system, boiler water circulation system.
Proportioning in the present patent application is the weight percentage of the pure substance of effective constituent.
Embodiment
The following stated embodiment describes the present invention in detail.In these embodiments, unless otherwise indicated, all per-cents all are weight percentage.
Embodiment 1:
Choose raw material by following weight percent:
Polyamino polyether base methylenephosphonic acid 20%-50%, dispersant with high efficiency 13%-35%, organic phospho acid (salt) 5%-10%, alkaline agent 3%-5%, an amount of water; Wherein, described polyamino polyether base methylenephosphonic acid is the compound as general formula 1 expression, [general formula 1]
N is an integer in the formula, and mean value is 5 to 15, and M is hydrogen or suitable positively charged ion, each R group can be identical also can be different, be hydrogen or methyl; Described dispersant with high efficiency is one or more the mixture in vinylformic acid-acrylate-phosphonic acids-sulfonate tetrapolymer, vinylformic acid-acrylate-sulfonate terpolymer, vinylformic acid-maleic acid, the hydrolytic polymaleic anhydride; Described organic phospho acid (salt) is one or more the mixture in ethylene diamine tetra methylene phosphonic acid salt, Amino Trimethylene Phosphonic Acid salt, the Amino Trimethylene Phosphonic Acid; Described alkaline agent is selected NaOH for use; Described water is pure water.
Above-mentioned raw materials is mixed in proportion, order is: polyamino polyether base methylenephosphonic acid, dispersant with high efficiency, organic phospho acid (salt), add an amount of water, be heated to 30-50 ℃ of insulation, stir after 1-2 hour, leave standstill and be cooled to 20-30 ℃, add the alkaline agent of corresponding proportioning, stirred 20-40 minute, and filtered, check, pack, put in storage.
Test example 1:
At present, the Scale inhibitors of using in the distillation sea water desalting technology is comparatively chaotic, and product performance differ greatly.The most representative SoKaLan PM15I of German BASF (BASF) company product, the Belgard EV2050 that greenization of Britain (BWA) company produces of mainly containing in the special foreign brand name specialty medicament, home products comprises the MED scale inhibitor special (low-temperature multiple-effect seawater desalination scale inhibitor special) that Qingdao Si Purun water treatment company produces, domestic simultaneous test of these Scale inhibitorss and the foregoing description 1 product being carried out scale-inhibiting properties, parameter and acute toxicity.
A. test and the result
A. test sample source (seeing Table 1)
Table 1 test sample source
| Business Name | The medicament title |
| The embodiment of the invention 1 | Embodiment 1 product |
| Germany BASF (BASF) company | SoKaLan?PM15I |
| Greenization of Britain (BWA) company | Belgard?EV2050 |
| Qingdao Si Purun water treatment company | The MED scale inhibitor special |
B.CaCO3 antisludging test (seeing Table 2)
Table 2 CaCO3 antisludging test
C.Mg (OH) 2 antisludging tests (seeing Table 3)
Table 3 Mg (OH) 2 antisludging tests
D.CaSO4 antisludging test (seeing Table 4)
Table 4 CaSO4 antisludging test
E. performance perameter relatively
Analyze above-mentioned simultaneous test data, in the CaCO3 antisludging test, the scale inhibition performance of the embodiment of the invention 1 product is respectively 85.32%, 88.97%, and the scale inhibition performance of other three Scale inhibitorss is 55.20-75.55%; In Mg (OH) 2 antisludging tests, the scale inhibition performance of the embodiment of the invention 1 product is respectively 88.33%, 90.93%, and the scale inhibition performance of other three Scale inhibitorss is 67.43-91.93%; In the CaSO4 antisludging test, the scale inhibition performance of the embodiment of the invention 1 product is respectively 91.60%, 95.73%, and the scale inhibition performance of other three Scale inhibitorss is 57.43-77.56%; In the performance perameter comparison test, the performance perameter of present embodiment 1 product also is better than other three kinds of Scale inhibitorss or very nearly the same.
In sum, the embodiment of the invention 1 product is many-sided more as can be known from CaCO3 dirt, Mg (OH) 2, CaSO4 scale inhibition performance and performance perameter etc., and the scale inhibition effect of the embodiment of the invention 1 product is better than correlated other three kinds of Scale inhibitorss.
Claims (10)
1. distillation sea water desalting dirt dispersion agent, it is characterized in that: the polyamino polyether base methylenephosphonic acid that contains 20%-50% (weight), the dispersant with high efficiency of 13%-35% (weight), 5%-10% (weight) organic phospho acid (salt), 3%-5% (weight) alkaline agent.
2. distillation sea water desalting dirt dispersion agent as claimed in claim 1, it is characterized in that: the content of polyamino polyether base methylenephosphonic acid is 20%-40% (weight), the content of dispersant with high efficiency is 13%-30% (weight), the content of organic phospho acid (salt) is 5%-9% (weight), and the content of alkaline agent is 3%-4.5% (weight).
3. distillation sea water desalting dirt dispersion agent as claimed in claim 1, it is characterized in that: the content of polyamino polyether base methylenephosphonic acid is 30%-40% (weight), the content of dispersant with high efficiency is 20%-30% (weight), the content of organic phospho acid (salt) is 6%-9% (weight), and the content of alkaline agent is 3.5%-4.5% (weight).
4. distillation sea water desalting dirt dispersion agent as claimed in claim 1, it is characterized in that: the content of polyamino polyether base methylenephosphonic acid is 30%-35% (weight), the content of dispersant with high efficiency is 20%-35% (weight), the content of organic phospho acid (salt) is 6%-8% (weight), and the content of alkaline agent is 3.5%-4% (weight).
5. claim 1,2,3 or 4 described distillation sea water desalting dirt dispersion agents is characterized in that: described polyamino polyether base methylenephosphonic acid is the compound as general formula 1 expression,
[general formula 1]
N is an integer in the formula, and mean value is 5 to 15, and M is hydrogen or suitable positively charged ion, each R group can be identical also can be different, be hydrogen or methyl.
6. claim 1,2,3 or 4 described distillation sea water desalting dirt dispersion agents is characterized in that: described dispersant with high efficiency is one or more the mixture in vinylformic acid-acrylate-phosphonic acids-sulfonate tetrapolymer, vinylformic acid-acrylate-sulfonate terpolymer, vinylformic acid-maleic acid, the hydrolytic polymaleic anhydride.
7. claim 1,2,3 or 4 described distillation sea water desalting dirt dispersion agents is characterized in that: described organic phospho acid (salt) is one or more the mixture in ethylene diamine tetra methylene phosphonic acid salt, Amino Trimethylene Phosphonic Acid salt, the Amino Trimethylene Phosphonic Acid.
8. claim 1,2,3 or 4 described distillation sea water desalting dirt dispersion agents, it is characterized in that: described alkaline agent is selected NaOH for use.
9. the preparation method of claim 1,2,3 or 4 described distillation sea water desalting dirt dispersion agents, it is characterized in that may further comprise the steps: mix polyamino polyether base methylenephosphonic acid, dispersant with high efficiency, organic phospho acid (salt) by its proportioning, add an amount of water, be heated to 30-50 ℃ of insulation, stir after 1-2 hour, leave standstill and be cooled to 20-30 ℃, add the alkaline agent of corresponding proportioning, stirred 20-40 minute, and filtered promptly.
10. the preparation method of distillation sea water desalting dirt dispersion agent as claimed in claim 5 is characterized in that: in its step, add an amount of water, be heated to 40 ℃ of insulations, stir after 1-2 hour, leave standstill and be cooled to 25 ℃, the alkaline agent that adds corresponding proportioning stirred 30 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102818312A CN102145943A (en) | 2010-09-15 | 2010-09-15 | Distillation sea water desalinating scale inhibition and dispersion agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102818312A CN102145943A (en) | 2010-09-15 | 2010-09-15 | Distillation sea water desalinating scale inhibition and dispersion agent and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102145943A true CN102145943A (en) | 2011-08-10 |
Family
ID=44420439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102818312A Pending CN102145943A (en) | 2010-09-15 | 2010-09-15 | Distillation sea water desalinating scale inhibition and dispersion agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102145943A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107261855A (en) * | 2017-07-20 | 2017-10-20 | 首钢集团有限公司 | A kind of reverse osmosis antisludging agent |
| CN108914592A (en) * | 2018-07-02 | 2018-11-30 | 汪涛 | A kind of dacron afterfinish softening agent |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101125715A (en) * | 2007-08-16 | 2008-02-20 | 樊桂修 | Composite corrosion-retarding antisludging agent for treating high-concentration multiple circulating water |
| CN101172719A (en) * | 2006-10-31 | 2008-05-07 | 中国石油化工股份有限公司 | Dirty blocking inhibitor and application in water treatment thereof |
| CN101497481A (en) * | 2009-03-17 | 2009-08-05 | 北京市紫东环保水处理药剂厂 | Scale inhibitor for reverse osmosis membrane and preparation thereof |
| CN101746899A (en) * | 2008-12-09 | 2010-06-23 | 赵立民 | Novel corrosion inhibition scale inhibitor |
-
2010
- 2010-09-15 CN CN2010102818312A patent/CN102145943A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101172719A (en) * | 2006-10-31 | 2008-05-07 | 中国石油化工股份有限公司 | Dirty blocking inhibitor and application in water treatment thereof |
| CN101125715A (en) * | 2007-08-16 | 2008-02-20 | 樊桂修 | Composite corrosion-retarding antisludging agent for treating high-concentration multiple circulating water |
| CN101746899A (en) * | 2008-12-09 | 2010-06-23 | 赵立民 | Novel corrosion inhibition scale inhibitor |
| CN101497481A (en) * | 2009-03-17 | 2009-08-05 | 北京市紫东环保水处理药剂厂 | Scale inhibitor for reverse osmosis membrane and preparation thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107261855A (en) * | 2017-07-20 | 2017-10-20 | 首钢集团有限公司 | A kind of reverse osmosis antisludging agent |
| CN108914592A (en) * | 2018-07-02 | 2018-11-30 | 汪涛 | A kind of dacron afterfinish softening agent |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102351328B (en) | Green total organic carbon steel scale and corrosion inhibitor for circulating cooling water system | |
| CN101607766B (en) | Preparation of corrosion and scale inhibitor used for high alkaline high chlorine circulating cooling water | |
| CN101913714B (en) | Reverse osmosis water treatment agent and preparation method thereof | |
| CN101423300B (en) | Scale and corrosion inhibitor suitable for reclaimed water reuse system | |
| CN101525185A (en) | Phosphorus-free corrosion and scale inhibitor and preparation method thereof | |
| CN106242085A (en) | A kind of circularly-cooling sea water non-phosphorus scale and corrosion inhibitor and preparation method thereof | |
| CN102417242A (en) | Environmentally friendly composite corrosion and scale inhibitor for circulating cooling water | |
| CN105129931A (en) | Bactericidal scale and corrosion inhibitor for seawater desalination | |
| CN102838216A (en) | Corrosion and scale inhibitor for treating water in heating boiler in winter | |
| CN103058399A (en) | Efficient alkyl ether carboxylate type dirt dispersion agent and application thereof | |
| CN1880244A (en) | Composite water treating agent for central air conditioner cooling water | |
| CN101519244A (en) | Compound scale inhibitor for treating recirculated cooling water and preparation method thereof | |
| CN106380009A (en) | Scale and corrosion inhibitor for industrial circulating cooling water | |
| CN102167451A (en) | Composite multiple dirt dispersion agent for oilfield flooding treatment and preparation method thereof | |
| CN105016490A (en) | Scale and corrosion inhibitor for power cycling water system | |
| CN102145943A (en) | Distillation sea water desalinating scale inhibition and dispersion agent and preparation method thereof | |
| CN106007017A (en) | Green and environment-friendly composite scale and corrosion inhibition chemical and preparation method thereof | |
| CN102417593B (en) | Biodegradable water treatment agent asparamido polyepoxy succinic acid and preparation method thereof | |
| CN105032193A (en) | Antiosmosis compound scale inhibitor and preparation method thereof | |
| CN105060517A (en) | Low-phosphorus high-efficiency corrosion and scale inhibitor and application thereof in scale inhibition of industrial circulating cooling water | |
| CN105060515A (en) | Scale inhibitor for preventing deposition of barium and strontium scales, and preparation method thereof | |
| CN101428912B (en) | Biodegradable scale inhibitor-carboxylic acid base-containing poly-asparagic acid derivant and method for producing the same | |
| CN102391491A (en) | Biodegradable water treatment agent p-sulfonicphenylaminopolyepoxysuccinic acid and preparation method thereof | |
| CN106587392A (en) | Water quality stabilization dispersant of blast furnace gas washing water circulation system and application thereof | |
| CN106967537A (en) | Treatment of Industrial Water device is removed contamination scale remover and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110810 |