CN105036140A - Method for reducing viscosity of silicon dioxide slurry - Google Patents
Method for reducing viscosity of silicon dioxide slurry Download PDFInfo
- Publication number
- CN105036140A CN105036140A CN201510369598.6A CN201510369598A CN105036140A CN 105036140 A CN105036140 A CN 105036140A CN 201510369598 A CN201510369598 A CN 201510369598A CN 105036140 A CN105036140 A CN 105036140A
- Authority
- CN
- China
- Prior art keywords
- viscosity
- monomer
- silica slurry
- formula
- silica
- 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.)
- Granted
Links
- 0 C*C1C=CC=CC1 Chemical compound C*C1C=CC=CC1 0.000 description 1
Abstract
The invention provides a method for reducing the viscosity of silicon dioxide slurry, which comprises the steps of adding sodium metaaluminate into the silicon dioxide slurry, and the weight ratio of the sodium metaaluminate and silicon dioxide is 0.1 to 2 in a thousand; performing mechanical stirring, and then adding 0.1 to 3 in a thousand by weight of dispersant based on the silicon dioxide, performing the mechanical stirring again. According to the method for reducing the viscosity of the silicon dioxide slurry, the viscosity of the silicon dioxide slurry can be reduced under the condition that the solid contain is not reduced and the dosage of a viscosity reducing agent is reduced, the obtained silicon dioxide slurry has good mobility; the method for reducing the viscosity of the silicon dioxide slurry is conducive to the delivering of a pump and drying, and avoids the waste of water resources and the waste of energy sources.
Description
Technical field
The present invention relates to the slurries of precipitated silica, be specifically related to a kind of method reducing viscosity of silica slurry.
Background technology
Precipitated silica, also known as white carbon black, is used in many fields, the fields such as such as rubber for tire manufacture, papermaking, paint, fodder additives.
In traditional precipitated silica production technique, the silica slurry without process of Dryly use, its viscosity is high, poor fluidity, generally adopts the mode added water to reach and falls low viscous object, but also can cause the reduction of solid content simultaneously.Do not take effectively to fall low viscous means in traditional precipitated silica Production Flow Chart.
Viscosity of silica slurry is high, poor fluidity, is not easy to pumping.Traditional employing adds water to fall low viscous method can cause a large amount of water resource waste, needs to remove a large amount of water when high temperature drying, causes again the waste of the energy.
CN101160261A discloses a kind of microparticulate silica, it can be suitable for use as picture and make an addition in water or the liquid such as fluid resin, coating, the rheology modifier that tackifier used when carrying out the adjustment of its viscoelastic property such as viscosity or thixotropy are such, enhancing-the weighting agent of silicon rubber or seal gum, CMP(chemically machinery polished) rumbling compound, the surface coated agent of ink jet recording paper.
CN101142287A discloses the silica dispersion containing partially hydrophobic silicon-dioxide when a kind of pH when dispersion is 5-12.
CN102286220A discloses a kind of preparation method of hydrophobic precipitated silicon dioxide, it is characterized in that, comprise following steps: (1) drips coupling agent and polyethers 30 ~ 120 DEG C time in the poly-organic hydrogen-containing siloxane adding an acidic catalyst, and time for adding is 0.5 ~ 3h; (2), after dropwising, at 80 ~ 150 DEG C of reaction 0.5 ~ 5h, surface-modifying agent is obtained; (3) surface-modifying agent is joined in precipitated silica silicon original material, high speed shear 0.5 ~ 5h under normal temperature; (4) by the mixture press filtration that (3) obtain, then 100 ~ 500 DEG C time, 1 ~ 24h is dried; (5) pulverize finally by pulverizer, obtain hydrophobic precipitated silicon dioxide.
WO2004/018359A1 discloses a kind of aqueous dispersion containing SiO 2 powder, wherein dioxide-containing silica is 10-60 % by weight, this dispersion liquid is stable within the scope of the pH of 2-6, this dispersion liquid is also containing at least one compound, this compound is dissolved in the aqueous solution within the scope of the pH of 2-6 at least in part with the form of polyvalent cation, this positively charged ion is stablized as the component of the negatively charged ion of the particle surface of SiO 2 powder in class silicate environment, the surface of versus-silica, the amount of cationic compound is provided to be that 0.001-0.1mg provides cationic compound/m
2silica sphere, this provides cationic compound to calculate with oxide compound, and the current potential of this dispersion liquid has the value being less than or equal to 0.
" stable mechanism of silicon sol dispersed alumina slurry and exempt from degassed colloidal state consolidation in-situ forming prepare mullite ceramic research ", " Chinese excellent MA theses full-text database engineering science and technology I collects ", Kong Deyu, on March 1st, 2005, disclose the impact of aluminum chloride for silicon sol, and when disclosing following content pH=9.0, it is very remarkable for the stability influence of silicon sol to add aluminum chloride.But what this literary composition was only studied is the impact of aluminum chloride on silicon sol stability, stability and viscosity are two diverse concepts, and such as stability mainly refers to and prevents silicon sol generation gelling.
The present inventor discloses a kind of method reducing viscosity of silica slurry at first patent application CN102718223A, sodium metaaluminate joins in silica slurry according to aluminum ion and silica weight than the ratio being 0.5 ~ 5 ‰ by the method, and through mechanical stirring, the method is under the condition not reducing slurry solid content, reduce the viscosity of slurry, the silica slurry good fluidity obtained, be conducive to conveying and the drying of pump, and this method also avoid the waste of water resources and the waste of the energy.But the method is limited for the reduction of viscosity of silica slurry, and sodium metaaluminate is higher.By reference the full content of this patent documentation is incorporated to herein.
This area needs a kind of method that effectively can reduce viscosity of silica slurry with lower viscosity reducers (as sodium metaaluminate) add-on.
Summary of the invention
The present inventor, through further investigation and lot of experiments, provides a kind of method that effectively can reduce viscosity of silica slurry with lower viscosity reducers usage quantity, and does not reduce the solid content of slurries.
A kind of method reducing viscosity of silica slurry, sodium metaaluminate joins in silica slurry than silica weight than the ratio being 0.1 ~ 2 ‰ according to aluminum ion by the method, and through mechanical stirring, and then the dispersion agent added based on silica weight 0.1 ~ 3 ‰, then carry out mechanical stirring.
The time that first time stirs is preferably 1-3h, and the time that second time stirs is preferably 0.5-2h.
Described dispersion agent obtains preferably by making following monomer mixture copolymerization, and described monomer mixture comprises following monomer or is made up of following monomer: (a) 70-95mol% methacrylic acid monomer; (b) 3-15mol% ethylenically unsaturated carboxylic acids or its acid anhydrides; Monomer shown in (c) 1-10mol% following formula I; Monomer shown in (d) 0.2-5mol% Formula Il:
formula (I)
formula (II)
Wherein, n is the integer of 4-8, is preferably 3-5, R
1and R
2be C1-C4 straight or branched alkyl independently of one another, be preferably C1-C3 alkyl, be more preferably methyl or ethyl.
Described ethylenically unsaturated carboxylic acids or its acid anhydrides are preferably as methylene-succinic acid, fumaric acid, toxilic acid etc., itaconic anhydride, maleic anhydride etc.
Be to be noted that such dispersion agent of the present invention there is not yet report at this, neither the routine of this area select, but those skilled in the art are by a large amount of further investigation exploitation.
The present inventor finds, described dispersion agent can make silica slurry keep good mobility and stability in higher concentrations, thus has good aid pumpability.Preliminary study shows, when identical mobility, adding of this dispersion agent can make silicon-dioxide solid content improve about 5-15 % by weight.About its viscosity-reducing mechanism, show after further study, this dispersion agent can form certain hydrophobic structure at silica sphere, more importantly, silica dispersion can be made to have lower iso-electric point, avoid the adhesion between silica dioxide granule.
The preparation of described dispersion agent can be undertaken by the typical polymerization methods of this area.
Polymerization process can adopt the polymerization process of this area routine to carry out, such as mass polymerization, solution polymerization, emulsion polymerization or suspension polymerization.The compound of described formula (I) and (II) can be commercially available, such as, purchased from Fluka company, also can obtain with reference to low-polyacrylate synthetic method.
Wherein, in the sodium metaaluminate weight added described in, aluminum ion weight can be 0.1 ~ 1 ‰ of silica slurry weight.
The solid content of described silica slurry can be 20 ~ 30%.
Described sodium metaaluminate can be pure sodium metaaluminate solid, or can be the aqueous solution be obtained by reacting by aluminium hydroxide and sodium hydroxide.When using aqueous solution form, its add-on in silica slurry is still based on sodium metaaluminate weighing scale.
Can to be aluminium hydroxide to mix with sodium hydroxide the described sodium metaaluminate aqueous solution by weight proportion at 1 ~ 2.5: 1, then add mixture weight 30 ~ 70% water boil obtain.
Can to be aluminium hydroxide to mix with sodium hydroxide the described sodium metaaluminate aqueous solution by weight proportion at 2: 1, then add mixture weight 60% water boil obtain.
Described mass concentration of boiling the sodium metaaluminate aqueous solution obtained can be 30% ~ 50%.
The described sodium metaaluminate aqueous solution can be that aluminium hydroxide mixes with caustic soda, adds water boil, is then filtered by the product obtained after boiling, and gets that supernatant liquor obtains.
In an especially preferred embodiment, described sodium metaaluminate is the modification sodium metaaluminate prepared by the following method:
(1) prepare sodium hydroxide solution, the quality of sodium hydroxide is 200-1000:1(g/L with the ratio of the volume of deionized water);
(2) in step (1) described sodium hydroxide solution, aluminium hydroxide is added, 4-6 hour is reacted at 140 DEG C-155 DEG C, add gac, sodium aluminate solution is obtained after filtration, cooling, add the stablizer based on sodium metaaluminate weighing scale 0.1-0.3% again, obtain the finished product sodium aluminate solution, the concentration of described sodium aluminate solution counts 260-300g/L with aluminium sesquioxide, and described stablizer is sodium polystyrene sulfonate.
In an especially preferred embodiment, described aluminum oxide is bayerite form.Research finds, uses the aluminum oxide of bayerite form, compared to the aluminas of other form as α-Al
2o
3or pseudo-boehmite, the foreign matter content in the sodium metaaluminate obtained can be made to reduce by more than one times.This special-effect of bayerite in silicon-dioxide viscosity reduction there is not yet report in the prior art.
Find in addition, sodium polystyrene sulfonate is compared to other common stablizer such as trolamine, sodium metaaluminate can be more effectively suppressed to place the generation of facile hydrolysis, sedimentation problem for a long time, such as, when using sodium polystyrene sulfonate, the effective storage period before being hydrolyzed is more than 2 times when using trolamine.In addition, the consumption of sodium polystyrene sulfonate is fewer than trolamine a lot, reduces the introducing of less desirable material.
In another one preferred embodiment of the present invention, the needs of product specification can also be looked, in silica slurry, add the mixture of sodium-metaphosphate and sodium lignosulfonate 1:3 ~ 3:1 weight ratio.The add-on of this mixture is 0.1 ~ 0.5 ‰ based on silica weight.Described mixture can play further dissemination to silicon-dioxide, thus reduces the viscosity of silica slurry further.
On the other hand, provide described silica slurry, the viscosity of this silica slurry can be 150 ~ 800cP (centipoise), preferred 150-500cP (centipoise), most preferably from about 150P (centipoise).
On the other hand, described silica slurry is provided in the application preparing rubber for tire, papermaking, preparation paint and prepare in fodder additives.
In another, provide the dispersion agent that can be used for reducing viscosity of silica slurry, this dispersion agent obtains by making following monomer mixture copolymerization, and described monomer mixture comprises following monomer or is made up of following monomer: (a) 70-95mol% methacrylic acid monomer; (b) 3-15mol% ethylenically unsaturated carboxylic acids or its acid anhydrides; Monomer shown in (c) 1-10mol% following formula I; Monomer shown in (d) 0.2-5mol% Formula Il:
formula (I)
formula (II)
Wherein, n is the integer of 3-8, is preferably 3-5, R
1and R
2be C1-C4 straight or branched alkyl independently of one another, be preferably C1-C3 straight chained alkyl, be more preferably ethyl.
Described ethylenically unsaturated carboxylic acids or derivatives thereof is preferably as methylene-succinic acid, fumaric acid, toxilic acid etc., itaconic anhydride, maleic anhydride etc.
Low viscous method falls in silica slurry provided by the invention, do not reduce slurry solid content and viscosity reducers consumption reduce condition under, reduce the viscosity of slurry, the silica slurry good fluidity of gained, thus be conducive to conveying and the drying of pump, and this method also avoid the waste of water resources and the waste of the energy.
Embodiment
Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
embodiment 1
The preparation of dispersion agent:
By following monomer mixture copolymerization, described monomer mixture is made up of following monomer: (a) 85mol% methacrylic acid monomer; (b) 8mol% methylene-succinic acid acid anhydrides; Monomer shown in (c) 5mol% following formula I; Monomer shown in (d) 2mol% Formula Il:
formula (I)
formula (II)
Wherein, n is 4, R
1and R
2be methyl,
Adopt emulsion polymerization, to 500mL with adding monomer mixture described in 80g and 200mL deionized water in the round-bottomed flask of mechanical stirring device, stir lower logical nitrogen, then 0.1g ammonium persulphate is added as initiator, be warming up to polymerization temperature, polymerization temperature is 80 DEG C, keeps reaction 3 hours, reclaims polymerisate after terminating reaction.
embodiment 2
By 3g mass concentration be 50% the sodium metaaluminate aqueous solution and 10kg viscosity be the silica slurry of 8000cP, the solid content of silica slurry is 24.2%, join in the reactor with whipping appts, stir, then add the dispersion agent that 1.5g embodiment 1 obtains, then carry out being stirred to evenly, testing size, gained slurries silicon-dioxide viscosity is 600cP(Brookfield viscometer, tests under normal temperature), solid content is 24.2%.Solid content is that in slurries, solid total mass obtains divided by the quality of all components of composition slurries.
comparative example 1
This comparative example is the embodiment in CN102718223A.By 10g mass concentration be 50% the sodium metaaluminate aqueous solution and 10kg viscosity be the silica slurry of 8000cP, the solid content of silica slurry is 24.2%, join in the reactor with whipping appts, testing size after stirring, gained slurries silicon-dioxide viscosity is 900cP(Brookfield viscometer, test under normal temperature), solid content is 24.2%.Solid content is that in slurries, solid total mass obtains divided by the quality of all components of composition slurries.
As can be seen from above-described embodiment and comparative example result clearly, when adopting dispersion agent of the present invention, not only can reduce the consumption of sodium metaaluminate, but also slurries silicon-dioxide viscosity can be made to be reduced by a larger margin, its reduction degree reaches about 33%.Such technique effect is that those skilled in the art can not expect.
The open the present invention of this written description use-case, comprises optimal mode, and also enables those skilled in the art manufacture and use the present invention.Of the present inventionly the scope of granted patent can be defined by the claims, and other example that those skilled in the art expect can be comprised.If other example this has the structural element of the literal language not differing from claims, if or other example this comprises and the equivalent structure element of the literal language of claims without substantial differences, then other example this is intended to be within the scope of claims.Can not cause under inconsistent degree, be incorporated herein by reference to by all references part of reference herein.
Claims (7)
1. one kind is reduced the method for viscosity of silica slurry, the method comprises the steps: sodium metaaluminate to join in silica slurry than silica weight than the ratio being 0.1 ~ 2 ‰ according to aluminum ion, and through mechanical stirring, and then the dispersion agent added based on silica weight 0.1 ~ 3 ‰, then carry out mechanical stirring.
2. the method for reduction viscosity of silica slurry according to claim 1, it is characterized in that, described dispersion agent obtains by making following monomer mixture copolymerization, and described monomer mixture comprises following monomer or is made up of following monomer: (a) 70-95mol% methacrylic acid monomer; (b) 3-15mol% ethylenically unsaturated carboxylic acids or its acid anhydrides; Monomer shown in (c) 1-10mol% following formula I; Monomer shown in (d) 0.2-5mol% Formula Il:
formula (I)
formula (II)
Wherein, n is the integer of 4-8, R
1and R
2be C1-C4 straight or branched alkyl independently of one another.
3. the method for reduction viscosity of silica slurry according to claim 1 and 2, is characterized in that, the solid content of described silica slurry is 25 ~ 35%.
4. the method for reduction viscosity of silica slurry according to claim 1 and 2, is characterized in that, described sodium metaaluminate is pure sodium metaaluminate solid, or by the aqueous solution that aluminium hydroxide and sodium hydroxide are obtained by reacting.
5., according to the silica slurry that the arbitrary described method of Claims 1 to 4 obtains, it is characterized in that, the viscosity of slurries is 150 ~ 800cP.
6. silica slurry according to claim 5 is in the application preparing rubber for tire, papermaking, preparation paint and prepare in fodder additives.
7. can be used for the dispersion agent reducing viscosity of silica slurry, this dispersion agent obtains by making following monomer mixture copolymerization, and described monomer mixture comprises following monomer or is made up of following monomer: (a) 70-95mol% methacrylic acid monomer; (b) 3-15mol% ethylenically unsaturated carboxylic acids or its acid anhydrides; Monomer shown in (c) 1-10mol% following formula I; Monomer shown in (d) 0.2-5mol% Formula Il:
formula (I)
formula (II)
Wherein, n is the integer of 3-8, R
1and R
2be C1-C4 straight or branched alkyl independently of one another.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510369598.6A CN105036140B (en) | 2015-06-29 | 2015-06-29 | Method for reducing viscosity of silicon dioxide slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510369598.6A CN105036140B (en) | 2015-06-29 | 2015-06-29 | Method for reducing viscosity of silicon dioxide slurry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105036140A true CN105036140A (en) | 2015-11-11 |
| CN105036140B CN105036140B (en) | 2017-05-24 |
Family
ID=54443192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510369598.6A Active CN105036140B (en) | 2015-06-29 | 2015-06-29 | Method for reducing viscosity of silicon dioxide slurry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105036140B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107151350A (en) * | 2017-04-24 | 2017-09-12 | 确成硅化学股份有限公司 | A kind of preparation method of high fluidity silica |
| CN113337076A (en) * | 2021-05-12 | 2021-09-03 | 瑞安市恒丰机电有限公司 | Bakelite flour material for manufacturing commutator |
| CN114085566A (en) * | 2021-12-07 | 2022-02-25 | 安徽进化硅纳米材料科技有限公司 | Aqueous silicon dioxide suspension, preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001097710A (en) * | 1999-09-29 | 2001-04-10 | Nippon Aerosil Co Ltd | Surface-modified silica fine particles for low viscosity slurry and its use |
| CN101547860A (en) * | 2006-12-12 | 2009-09-30 | 扶桑化学工业股份有限公司 | Method for producing colloidal silica |
| CN102718223A (en) * | 2011-12-27 | 2012-10-10 | 确成硅化学股份有限公司 | Method for reducing viscosity of silica slurry |
| US20130075652A1 (en) * | 2011-09-26 | 2013-03-28 | Fuji Xerox Co., Ltd. | Method of manufacturing silica particle dispersion |
| CN103468030A (en) * | 2013-08-23 | 2013-12-25 | 确成硅化学股份有限公司 | Preparation method of high-dispersity silicon dioxide |
-
2015
- 2015-06-29 CN CN201510369598.6A patent/CN105036140B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001097710A (en) * | 1999-09-29 | 2001-04-10 | Nippon Aerosil Co Ltd | Surface-modified silica fine particles for low viscosity slurry and its use |
| CN101547860A (en) * | 2006-12-12 | 2009-09-30 | 扶桑化学工业股份有限公司 | Method for producing colloidal silica |
| US20130075652A1 (en) * | 2011-09-26 | 2013-03-28 | Fuji Xerox Co., Ltd. | Method of manufacturing silica particle dispersion |
| CN102718223A (en) * | 2011-12-27 | 2012-10-10 | 确成硅化学股份有限公司 | Method for reducing viscosity of silica slurry |
| CN103468030A (en) * | 2013-08-23 | 2013-12-25 | 确成硅化学股份有限公司 | Preparation method of high-dispersity silicon dioxide |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107151350A (en) * | 2017-04-24 | 2017-09-12 | 确成硅化学股份有限公司 | A kind of preparation method of high fluidity silica |
| CN107151350B (en) * | 2017-04-24 | 2019-06-07 | 确成硅化学股份有限公司 | A kind of preparation method of high fluidity silica |
| CN113337076A (en) * | 2021-05-12 | 2021-09-03 | 瑞安市恒丰机电有限公司 | Bakelite flour material for manufacturing commutator |
| CN114085566A (en) * | 2021-12-07 | 2022-02-25 | 安徽进化硅纳米材料科技有限公司 | Aqueous silicon dioxide suspension, preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105036140B (en) | 2017-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2802512C (en) | Aqueous slurry of amorphous silica and method for its production | |
| CN103468028B (en) | A kind of Efficient calcium slurry dispersant and preparation method thereof | |
| CN101274242B (en) | Method for preparing polymer ceramic dispersants | |
| CN105110687A (en) | Mud resisting and slump retaining type polycarboxylic acids water reducer and preparation method thereof | |
| ES2930124T3 (en) | Whitewash | |
| JPS61148271A (en) | Water-soluble dispersant for aqueous pigment composition | |
| CN103467039A (en) | Cement-base waterproof coating and preparation method thereof | |
| CN105036140A (en) | Method for reducing viscosity of silicon dioxide slurry | |
| CN102516821A (en) | Surface modification method of nano-grade calcium carbonate used in room-temperature vulcanized silicone adhesive | |
| CN113321438B (en) | Slurry-rich concrete additive and preparation method thereof | |
| CN105802602A (en) | High-stability oil-based polymer powder suspension and preparation method thereof | |
| CN104479411A (en) | Surface modification method of special nano calcium carbonate for silicone sealants | |
| CN101068886A (en) | Preparation process of azo pigment dispersion | |
| CN104804716A (en) | Well-cementing and anti-channeling nonionic styrene-butadiene latex and preparation method thereof | |
| CN109652037B (en) | High-temperature stable cement slurry and preparation method thereof | |
| Peng et al. | Effect of molecular weight of polycarboxylate-type superplasticizer on the rheological properties of cement pastes | |
| JP3967538B2 (en) | Method for producing cationic resin-modified silica dispersion | |
| CN115109498A (en) | Environment-friendly self-drying single-component epoxy coating and preparation method thereof | |
| CN110683550B (en) | Silica slurry for wet toothpaste and preparation method thereof | |
| CN102604543A (en) | Preparation method of high-stability nano cerium dioxide aqueous slurry for polishing solution | |
| CN111662587A (en) | Polymer dispersant for coating and preparation method thereof | |
| CN105778568B (en) | A kind of Nano calcium carbonate dedicated surface treatment method of photovoltaic glue | |
| CN106320065B (en) | A kind of preparation method of high solids content talcum powder and heavy calcium carbonate slurry | |
| CN104193659B (en) | Benzoyl group thiol esters compounds, its preparation method and its application | |
| CN115403300B (en) | Modified nano foam stabilizer and application 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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Fengqiao Industrial Park, Chuyang City, Anhui Province Patentee after: Anhui Axi Green Technology Co.,Ltd. Patentee after: Quecheng silicon Chemical Co., Ltd Address before: Fengqiao Industrial Park, Chuyang City, Anhui Province Patentee before: ANHUI QUECHEN SILICON CHEMICAL CO.,LTD. Patentee before: Quecheng silicon Chemical Co., Ltd |