CN103145139A - Viscosity reducer for improving viscosity of kaolin, and its preparation method - Google Patents
Viscosity reducer for improving viscosity of kaolin, and its preparation method Download PDFInfo
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- CN103145139A CN103145139A CN2013100552765A CN201310055276A CN103145139A CN 103145139 A CN103145139 A CN 103145139A CN 2013100552765 A CN2013100552765 A CN 2013100552765A CN 201310055276 A CN201310055276 A CN 201310055276A CN 103145139 A CN103145139 A CN 103145139A
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Abstract
The invention relates to a viscosity reducer for improving the viscosity of kaolin, and its preparation method. The viscosity reducer is composed of 18-35wt% of sodium hexametaphosphate, 55-75wt% of sodium polyacrylate, 5-11wt% of borax, 0.01-0.05wt% of sodium hydroxide and 0.005-0.015wt% of methyl blue. The preparation method of the viscosity reducer comprises the following steps: weighing sodium hexametaphosphate, sodium polyacrylate and borax according to the respective weight percentages, adding the above three medicines to a barrel provided with water in sequence under stirring, dissolving the three medicines, supplementing water to the barrel to make the total solid content of the three medicines in water in a range of 8-20%, stirring, adding sodium hydroxide in a dropwise manner to the barrel, adding methyl blue in a dropwise manner, and continuously stirring until uniform mixing in order to prepare the finished viscosity reducer. The viscosity reducer improves the fluidity of kaolin used in the papermaking industry and reduces the viscosity of kaolin on the premise that the whiteness of kaolin is not lower than 90% and the content of particles having granularities of below 2mum is not lower than 90%, and the viscosity of kaolin added with the viscosity reducer under a 500mPa.s condition can reach above 70.2%.
Description
Technical field
The present invention relates to the industries such as papermaking, coating and glue with kaolin deep processing field, be specifically related to a kind of viscosity-depression agent for improvement of kaoline viscosity and preparation method thereof, this viscosity-depression agent can improve kaolinic mobility.
Background technology
Kaolin is that paper industry production high grade coated paper is opened one of best white mineral pigment, owing to having good wetting ability, high fineness, high whiteness, inertia by force and the characteristics such as sheet, laminate structure, showing good printing performance, oil suction China ink, glossiness and planeness in paper application, is the irreplaceable high quality raw material of other mineral fillers.
China finds and uses kaolinic country the earliest, and kaolin resource is quite abundant.But because minerogentic condition is different, domestic kaolin is mainly used in electroceramics, refractory materials, petrochemical complex, smelting iron and steel, rubber plastic and the industries such as partial coating, paint, and in developed countries such as English, U.S.s, kaolin is widely used in filler and the coating of papermaking.Kaolin Main physical performance index in high-grade papermaking paint are whiteness, granularity and viscosity, require whiteness more than or equal to 90%, granularity-2 micron content is more than or equal to 90%, " two 90 " product that we often say.Equally, kaolinic viscosity is also the same important with whiteness, size indicator.China's kaolin industry is during the State's Ninth Five-Year Plan period, once utilized advanced bleaching technology, centrifugal classification technology and Peeling Technology, the indices such as the kaolinic whiteness of coating level of producing, purity, fineness have reached international standards, high, the poor fluidity of viscosity only, and fail for many years to break through.After entering this century, the linear velocity that China's paper industry is generally introduced coating machine is higher, production capacity is larger, this just requires, and kaolinic flowing property is better, purity is higher, industrialization is larger, in the hope of the good printing quality of paper, higher unit grammes per square metre and stable product quality.
With regard to kaolin, the solid content of viscosity concentration value when 500mPas must reach the 70% normal service requirements that could satisfy the import coating machine with regard to high-grade paper making and cloth coating, and the paper product quality of production could the conformance with standard requirement.Simultaneously, require kaolinic mineral structure not to be damaged, whiteness, fineness and other physicalies and application performance are unaffected, that adds is interference-free in the White Board production process for the medicaments such as viscosity-depression agent that improve the kaolin mobility, and can satisfy environmental protection, Occupational health and wait safely operation, service requirements.At present, the method for improving kaoline viscosity mainly contains following several: the one, select the viscosity reduction device processes kaolin minerals such as viscosity-reducing machine, and improve the mobility of mineral; The 2nd, add medicament and improve the pH value of mineral; The 3rd, when selecting the kaolin raw material, select the kaolin mineral of sheet structure, etc.But no matter adopt which kind of method, kaolinic viscosity concentration index is difficult to reach the service requirements of paper industry.China's paper industry exists the not high problem of coating level kaolin product class all the time in evolution, namely mainly refer to the problem that poor fluidity or viscosity are high.The technical problem and the Industry Promotion that solve kaoline viscosity are used, and for the fast development of high-grade paper product provides the supporting raw material of high-quality, the fast development of promotion paper industry, very important meaning are arranged.For this reason, how to design the problem that a kind of viscosity-depression agent for improvement of kaoline viscosity and preparation method thereof becomes the present invention's research.
Summary of the invention
The object of the invention is to provide a kind of viscosity-depression agent for improvement of kaoline viscosity and preparation method thereof, has solved present paper industry with kaolin poor fluidity, problem that viscosity is high.
For achieving the above object, a kind of technical scheme that adopts for improvement of the viscosity-depression agent of kaoline viscosity of the present invention is: in described viscosity-depression agent, the formula of effective active composition is comprised of the component of following weight percent:
Sodium hexametaphosphate 99 18 ~ 35%;
Sodium polyacrylate 55 ~ 75%;
Borax 5 ~ 11%;
Sodium hydroxide 0.01 ~ 0.05%;
Methylene blue 0.005 ~ 0.015%.
Related content in technique scheme is explained as follows:
1, in such scheme, in viscosity-depression agent of the present invention, the effective active composition refers to kaolin is played the viscosity reduction effect, is used for improving the activeconstituents of kaolin mobility, and the effective active composition is comprised of Sodium hexametaphosphate 99, sodium polyacrylate, borax, sodium hydroxide and Methylene blue.
2, in such scheme, viscosity is to characterize internal fluid because the internal friction effect hinders the important physical parameter that it flows relatively, the statement of kaolinic viscosity characteristics has two kinds of methods: a kind of is that viscosity number during with a certain solid content represents, another kind is that the solid content viscosity concentration during with a certain viscosity number represents.Kaolinic viscosity number η (unit is mPas) or viscosity concentration c (unit is %) all represent kaolinic flowing property, due to
Be negative correlativing relation with c, calculate the solid content of sample when the 500mPas according to corresponding solid content and viscosity number.The kaoline viscosity concentration value is higher, shows that viscosity is lower, and namely mobility is better, and the surface covered when coating papermaking is faster, and paper has smoothness preferably.
3, in such scheme, in described viscosity-depression agent formula, the better weight percent of Sodium hexametaphosphate 99 is 20 ~ 30%.
4, in such scheme, the addition manner of described viscosity-depression agent has much relations to the quality of improving kaoline viscosity (being mobility).The viscosity-depression agent of the present invention development is added on best results in kaolin concentrate slurry after bleaching, the addition of viscosity-depression agent depending on kaolinic original viscosity, generally, addition be in concentrate slurry kaolin weight 0.5 ~ 2.0%.Wherein, the kaolin concentrate slurry after bleaching of the present invention refers to the concentrate that the kaolin raw ore obtains after through slurrying, classification, super-fine classified, flocculation, bleaching.
for achieving the above object, the technical scheme that the preparation method of a kind of viscosity-depression agent for improvement of kaoline viscosity of the present invention adopts is: according to above-described viscosity-depression agent for improvement of kaoline viscosity, with Sodium hexametaphosphate 99, three kinds of medicaments of sodium polyacrylate and borax according to weight percent weighing separately after, under agitation condition with Sodium hexametaphosphate 99, the front and back order of sodium polyacrylate and borax adds respectively in the container that water is housed, then add water in container after described three kinds of medicament dissolutions, the total solid content that makes the described three kinds of medicaments in water is 8 ~ 20%, stir after 15 ~ 50 minutes, drip sodium hydroxide in container, and then dropping Methylene blue, making the weight percent of sodium hydroxide in the effective active composition of described viscosity-depression agent is 0.01 ~ 0.05%, the weight percent of Methylene blue is 0.005 ~ 0.015%, continue to be stirred to and make described viscosity-depression agent finished product after mixing.
Related content in technique scheme is explained as follows:
1, in such scheme, described total solid content refers to Sodium hexametaphosphate 99, sodium polyacrylate and three kinds of medicament solid content value sums of borax, wherein, solid content refers to emulsion or coating is dried the mass percent that rear remainder accounts for total amount under prescribed condition, in fact makes " non-volatile part of content " more definite.
Design concept of the present invention is: kaolinic main ingredient is kaolinite, 7A halloysite and 10A halloysite, and component and viscosity that kaolin contains have direct relation.When kaolinite content was high, if kaolinite is false hexagonal flake structure, interlayer structure power was poor, and kaolinic viscosity is low, if kaolinite is needle-like or tubular structure, kaolinic viscosity is high; When halloysite content was high, kaolinic viscosity was high.Be used for the kaolin of papermaking paint, best particle size distribution is 1 ~ 2 micron, because below 0.5 micron, kaolin particle is too thin, can affect paper surface properties; Simultaneously, granularity is thinner, and viscosity is higher.Kaolin Main physical performance index in high-grade papermaking paint are whiteness, granularity and viscosity, require whiteness more than or equal to 90%, granularity-2 micron content is more than or equal to 90%.Whiteness and granularity have viscosity characteristics preferably simultaneously and the present invention will make kaolin product have preferably exactly.
The unit layer of kaolinite structure is by a slice Si-O tetrahedron and a slice Al-(O, OH) octahedron is combined into, the structural unit layer continues on a axle and b direction of principal axis, stacking on the c-axis direction, therefore kaolinite has double electrical layers, and the pH when pure kaolin Zeta potential equals zero is 4.8, when adjustment pH leaves this iso-electric point, just produce charge unbalance, thereby cause the mutual repulsion of kaolin particle.The viscosity-depression agent of the present invention's development is joined in the kaolin ore pulp, changed kaolinic Zeta potential, weaken the bond energy of kaolin particle, make kaolin particle be in the monomer dispersion state, improved the mobility of ore pulp.Wherein, in the formula of viscosity-depression agent of the present invention, Sodium hexametaphosphate 99 and sodium polyacrylate have dissemination, and kaolin slurry is fully disperseed, and simultaneously the viscosity characteristics of kaolin product are improved; In formula, borax mainly plays the effect that reduces kaolin product viscosity; In formula, sodium hydroxide mainly plays lubrication for kaolin, makes simultaneously kaolin product be meta-alkalescence, kaolinic good fluidity under the condition of meta-alkalescence; Methylene blue plays whitening effect for kaolin product, to keep the whiteness of kaolin product.
Because technique scheme is used, the present invention compared with prior art has following advantages and effect: a kind of viscosity-depression agent for improvement of kaoline viscosity provided by the invention and preparation method thereof, can improve the kaolinic mobility of paper industry, can reduce kaolinic viscosity, wherein, added viscosity-depression agent of the present invention the kaolin concentrate whiteness more than or equal to 90%, granularity-2 micron content more than or equal to 90% prerequisite under, its viscosity concentration under the 500mPas condition can reach more than 70.2%.
Embodiment
The invention will be further described below in conjunction with embodiment:
Embodiment one ~ embodiment three: a kind of viscosity-depression agent for improvement of kaoline viscosity and preparation method thereof
the preparation method: according to the formula of table 1 with Sodium hexametaphosphate 99, after three kinds of medicaments of sodium polyacrylate and borax weigh up according to separately weight percent, under agitation condition with Sodium hexametaphosphate 99, the front and back order of sodium polyacrylate and borax adds respectively in the bucket that water is housed, then add water in bucket after described three kinds of medicament dissolutions, the total solid content that makes the described three kinds of medicaments in water is 8 ~ 20%, stir after 15 ~ 50 minutes, drip sodium hydroxide according to the formula of table 1 in bucket, and then dropping Methylene blue, continue to be stirred to and make described viscosity-depression agent finished product after mixing.Embodiment one ~ embodiment three has all prepared the viscosity-depression agent for improvement of kaoline viscosity of 1000 grams.
Composition of raw materials is comprised of the material of following weight part:
Viscosity-depression agent formula (the unit: gram) of table 1: embodiment one～embodiment three
| Project | Example one | Example two | Example three |
| Sodium hexametaphosphate 99 | 199.45 | 180 | 350 |
| Sodium polyacrylate | 750 | 709.82 | 550 |
| Borax | 50 | 110 | 99.6 |
| Sodium hydroxide | 0.5 | 0.1 | 0.3 |
| Methylene blue | 0.05 | 0.08 | 0.1 |
After preparing viscosity-depression agent, take the Kaolin of Suzhou sample of two parts of same viscosity higher, every duplicate samples 1000 grams, a copy of it is used for measuring kaolinic original viscosity, under the 500mPas condition, viscosity concentration determination value is 40%, and viscosity represents with viscosity concentration, and the measuring method of viscosity concentration is referring to the 27th page of GB/T 14563-2008 " kaolin and test method thereof ".An other duplicate samples is placed in agitation vat, adds water 3000ml, and add the dispersion agent of some amount and kind, stagnated 10 minutes, decant later on every 10 minutes decants once, repeats 3 ~ 4 times, throw out is lost obtain suspension.And then take out partial suspended liquid and carry out viscosity and measuring brightness, the measuring method of whiteness is referring to the 21st page of GB/T 14563-2008 " kaolin and test method thereof "; Remainder adds appropriate flocculation agent and SYNTHETIC OPTICAL WHITNER, after question response is completed, this ore pulp is divided into two, and one of them carries out viscosity and measuring brightness; Second half is another is divided into three, and the viscosity-depression agent that adds respectively embodiment one to embodiment three to prepare treats that ore pulp fully activates, and carries out respectively viscosity and measuring brightness, measures numerical value and sees the following form 2:
Table 2: sample viscosity and whiteness index determining (unit: %)
| Project | Viscosity concentration (under the 500mPas condition) | Whiteness | Remarks |
| Suspension | 62.5 | 85.2 | ? |
| The bleaching sample | 63.2 | 89.5 | ? |
| Add viscosity-depression agent sample one | 70.2 | 91.5 | Addition 1.00% |
| Add viscosity-depression agent sample two | 70.4 | 91.8 | Addition 1.05% |
| Add viscosity-depression agent sample three | 70.4 | 91.7 | Addition 1.10% |
as seen from Table 2, wherein, suspension just refers to the kaolin raw ore in process slurrying, classification and the ore pulp solution that makes after adding dispersion agent, and the viscosity concentration value of suspension is higher than the original viscosity concentration of kaolin sample, represents that namely the viscosity of suspension is low, the bleaching sample refers to the kaolin raw ore after process slurrying, classification and adding dispersion agent, then adds the concentrate slurry that makes after flocculation agent and SYNTHETIC OPTICAL WHITNER, as seen from Table 2, after adding flocculation agent and SYNTHETIC OPTICAL WHITNER, kaolinic viscosity, whiteness uprises simultaneously, add viscosity-depression agent sample one, what interpolation viscosity-depression agent sample two and interpolation viscosity-depression agent sample three represented respectively is to add embodiment one in concentrate slurry again, the final sample of gained after the viscosity-depression agent that embodiment two and embodiment three prepare, wherein, the addition that adds viscosity-depression agent in viscosity-depression agent sample one be in concentrate slurry kaolin weight 1.00%, the addition that adds viscosity-depression agent in viscosity-depression agent sample two be in concentrate slurry kaolin weight 1.05%, the addition that adds viscosity-depression agent in viscosity-depression agent sample three be in concentrate slurry kaolin weight 1.10%, the viscosity concentration value of these three final samples is all more than 70%, whiteness value is all more than 91%, after showing the interpolation viscosity-depression agent, kaolinic viscosity is lower, good fluidity, and whiteness is good.
Embodiment four ~ embodiment five: a kind of viscosity-depression agent for improvement of kaoline viscosity and preparation method thereof
The formula of viscosity-depression agent is shown in Table 3, and embodiment four and embodiment five have all prepared the viscosity-depression agent for improvement of kaoline viscosity of 100 tons.
The viscosity-depression agent formula of table 3: embodiment four and embodiment five (unit: ton)
| Project | Example four | Example five |
| Sodium hexametaphosphate 99 | 30 | 25.448 |
| Sodium polyacrylate | 59.965 | 65.5 |
| Borax | 10 | 9 |
| Sodium hydroxide | 0.02 | 0.04 |
| Methylene blue | 0.015 | 0.012 |
The preparation method of embodiment four and embodiment five viscosity-depression agents is identical with embodiment one ~ embodiment three.
Choose original viscosity concentration under 500 mPas conditions and be 40% kaolin raw ore, produce the kaolin concentrate by existing processes, add the viscosity-depression agent that embodiment four prepares again in the kaolin concentrate that makes, the kaolin sample that finally makes is delivered to Shanghai Jiangnan Paper Mill Technology Section and is done the product detection, detects index as follows:
Moisture is 0.61%; Whiteness is 90.10%; PH is 3.68; Loss on ignition is 14.35%; 45 tm screen surpluses are 0.03%; Be 90.53% less than 2 microns content; 1.2488 microns of median sizes; The sandstone amount is 0.09%; Fe
2O
3Content is 0.23%; Al
2O
3Content is 37.56%; SiO
2Content is 45.36%; Viscosity concentration is under 70.76%(500 mPas condition).
In order to illustrate that better the viscosity-depression agent of development is to kaolinic action effect, choose again original viscosity concentration under 500 mPas conditions and be 42% kaolin raw ore, by existing processes production, being the kaolin raw ore obtains concentrate after through slurrying, classification, super-fine classified, flocculation, bleaching, add the viscosity-depression agent that embodiment five prepares again in the kaolin concentrate that makes, produce altogether more than 150 ton of kaolin product of high-grade paper making and cloth coating.Through Suzhou paper company flow test, effect is fine, can substitute U.S.'s kaolin fully.And this sample is delivered to Shanghai Jiangnan Paper Mill Technology Section make viscosity concentration and whiteness test.Detected result is as follows:
Whiteness is 90.3%; Viscosity concentration is under 70.57%(500 mPas condition).
Above-described embodiment only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow person skilled in the art scholar can understand content of the present invention and implement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (3)
1. viscosity-depression agent for improvement of kaoline viscosity, it is characterized in that: in described viscosity-depression agent, the formula of effective active composition is comprised of the component of following weight percent:
Sodium hexametaphosphate 99 18 ~ 35%;
Sodium polyacrylate 55 ~ 75%;
Borax 5 ~ 11%;
Sodium hydroxide 0.01 ~ 0.05%;
Methylene blue 0.005 ~ 0.015%.
2. a kind of viscosity-depression agent for improvement of kaoline viscosity according to claim 1, it is characterized in that: in described formula, the weight percent of Sodium hexametaphosphate 99 is 20 ~ 30%.
3. preparation method for improvement of the viscosity-depression agent of kaoline viscosity, it is characterized in that: the viscosity-depression agent for improvement of kaoline viscosity according to claim 1, with Sodium hexametaphosphate 99, three kinds of medicaments of sodium polyacrylate and borax according to weight percent weighing separately after, under agitation condition with Sodium hexametaphosphate 99, the front and back order of sodium polyacrylate and borax adds respectively in the container that water is housed, then add water in container after described three kinds of medicament dissolutions, the total solid content that makes the described three kinds of medicaments in water is 8 ~ 20%, stir after 15 ~ 50 minutes, drip sodium hydroxide in container, and then dropping Methylene blue, making the weight percent of sodium hydroxide in the effective active composition of described viscosity-depression agent is 0.01 ~ 0.05%, the weight percent of Methylene blue is 0.005 ~ 0.015%, continue to be stirred to and make described viscosity-depression agent finished product after mixing.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108676386A (en) * | 2018-05-04 | 2018-10-19 | 内蒙古超牌建材科技有限公司 | Low viscosity calcined kaolin, low viscosity calcined kaolin slurry and preparation method thereof |
| CN110616062A (en) * | 2019-10-22 | 2019-12-27 | 湖北富邦科技股份有限公司 | Additive for long-distance conveying of high-concentration phosphorus ore pulp |
| CN113953025A (en) * | 2021-10-11 | 2022-01-21 | 中铝中州铝业有限公司 | Method for grinding viscous bauxite |
-
2013
- 2013-02-21 CN CN201310055276.5A patent/CN103145139B/en active Active
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| 朱小燕等: "提高造纸用高岭土粘浓度及分散特性的研究", 《武汉理工大学学报》 * |
| 谢静思等: "高岭土降粘试验研究", 《中国非金属矿工业导刊》 * |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108676386A (en) * | 2018-05-04 | 2018-10-19 | 内蒙古超牌建材科技有限公司 | Low viscosity calcined kaolin, low viscosity calcined kaolin slurry and preparation method thereof |
| CN108676386B (en) * | 2018-05-04 | 2020-11-10 | 内蒙古超牌建材科技有限公司 | Low-viscosity calcined kaolin, low-viscosity calcined kaolin slurry and preparation method thereof |
| CN110616062A (en) * | 2019-10-22 | 2019-12-27 | 湖北富邦科技股份有限公司 | Additive for long-distance conveying of high-concentration phosphorus ore pulp |
| CN113953025A (en) * | 2021-10-11 | 2022-01-21 | 中铝中州铝业有限公司 | Method for grinding viscous bauxite |
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