CN102011337A - Preparation method of modified bentonite particle retention aid for papermaking - Google Patents
Preparation method of modified bentonite particle retention aid for papermaking Download PDFInfo
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- CN102011337A CN102011337A CN 201010509815 CN201010509815A CN102011337A CN 102011337 A CN102011337 A CN 102011337A CN 201010509815 CN201010509815 CN 201010509815 CN 201010509815 A CN201010509815 A CN 201010509815A CN 102011337 A CN102011337 A CN 102011337A
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Abstract
The invention relates to a preparation method of a modified bentonite particle retention aid for papermaking, comprising the following steps of: mechanically pulverizing mined natural bentonite into particles below 200 meshes, then dispersing the pulverized bentonite in water, and washing and sieving to remove impurities; adding an acid solution into bentonite suspension for reacting and then separating to remove the precipitated impurities; extruding and dehydrating the separated bentonite suspension, repeatedly washing and extruding until the pH value is 3-6.5; and finally, diluting and dispersing bentonite subjected to acidization with water, adding sodium salt for reacting and then diluting the bentonite suspension until the mass concentration is 0.01-5% to obtain the modified bentonite particle retention aid. In the invention, the adopted two-step modification method can be used for favorably removing the impurities in the bentonite so as to improve the content of the active ingredients in the bentonite, and in addition, the extrusion and dehydration treatment can be carried out before drying so as to improve drying efficiency and reduce production cost. The method benefits the improvement of the quality of the bentonite particle retention aid and use effect of the same in papermaking.
Description
Technical field
The invention belongs to chemical industry and paper industry field, be specifically related to a kind of preparation method of paper grade (stock) modified alta-mud microparticle retention aid.
Background technology
1986, people such as Langley, Litchfield studied the use of bentonite particulate in paper making wet part, indicated the appearance of microparticle retention and drainage system.This system has extraordinary retention and drainage effect to paper stock, and therefore, once rapid popularization occurring just having obtained, most of modern Paper dissolving machine is all used this retention aid and filtering aid system both at home and abroad at present.In this retention aid and filtering aid system, the method for modifying of bentonite microparticle retention aid is: natural montmorillonite washes with water earlier, screens, and removes impurity, to improve the content of effective ingredient montmorillonite in the bentonite, then, carry out modification, make the bentonite sodium with NaOH or sodium carbonate etc.But there is following shortcoming in this method of modifying: one, and the density of impurity such as natural montmorillonite and fine sand is suitable substantially, and all water insoluble, and therefore, the impurity separation difficulty causes effective component content on the low side; Two, bentonite is behind sodium modification, and bentonite has become hydrated state, gel, though, the easy precipitate and separate of impurity at this moment, the bentonite concentration behind the sodium modification generally has only below 20%, can't dewater with fashion of extrusion, convection drying, cost are very high again.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of impurity that can remove in the bentonite is provided, improve effective component content in the bentonite, and can carry out extrusion dehydration before drying handles, improve drying efficiency, the preparation method of the paper grade (stock) modified alta-mud microparticle retention aid that reduces production costs.
For achieving the above object, the technical solution used in the present invention is:
1) at first, the natural montmorillonite with exploitation carries out then, disperseing below mechanical crushing to 200 order washing, screening removal impurity in water;
2) secondly, regulate mass concentration to 1～40% of bentonite suspension, and then to add with respect to the bentonite quality be 1～20% acid solution,, after reaction finishes, separate the impurity of removing precipitation 40～100 ℃ of reactions 2～10 hours down;
3) then, with cyclic washing behind the isolated bentonite suspension extrusion dehydration, to be squeezed to the pH value be 3～6.5;
4) last, directly dilute and sodium modification, or dry earlier, dilute again and sodium modification;
Said sodium modification technology: it is 0.1～80% that dilute with water disperses bentonite to the mass concentration after the acidification, adding with respect to the bentonite quality is 0.5～10% sodium salt again, at 20～100 ℃, reacted 0.5～7 hour, after reaction finishes, with bentonite suspension be diluted to mass concentration be 0.01～5% the modified alta-mud microparticle retention aid.
Acid solution of the present invention is sulfuric acid, hydrochloric acid, nitric acid or acetate; Sodium salt is sodium carbonate, NaOH or sodium chloride.
The present invention adopts the impurity of two step modification methods in can fine removal bentonite, improves effective component content in the bentonite, and can carry out extrusion dehydration and handle before drying, improves drying efficiency, reduces production costs.Can improve the quality of bentonite microparticle retention aid, improve its result of use in papermaking.
The specific embodiment
Embodiment 1:
1) at first, the natural montmorillonite with exploitation carries out then, disperseing below mechanical crushing to 200 order washing, screening removal impurity in water;
2) secondly, regulate the mass concentration to 1% of bentonite suspension, and then to add with respect to the bentonite quality be 1% sulfuric acid solution,, after reaction finishes, separate the impurity of removing precipitation 80 ℃ of reactions 4 hours down;
3) then, with cyclic washing behind the isolated bentonite suspension extrusion dehydration, to be squeezed to the pH value be 5;
4) last, directly dilute and sodium modification, or dry earlier, dilute again and sodium modification;
Said sodium modification technology: it is 0.1% that dilute with water disperses bentonite to the mass concentration after the acidification, adding with respect to the bentonite quality is 0.5% sodium carbonate again, at 20 ℃, reacted 7 hours, after reaction finishes, with bentonite suspension be diluted to mass concentration be 0.01% the modified alta-mud microparticle retention aid.
Embodiment 2:
1) at first, the natural montmorillonite with exploitation carries out then, disperseing below mechanical crushing to 200 order washing, screening removal impurity in water;
2) secondly, regulate the mass concentration to 10% of bentonite suspension, and then be 5% hydrochloric acid solution,, after reaction finishes, separate the impurity of removing precipitation 40 ℃ of reactions 10 hours down with respect to the bentonite quality;
3) then, with cyclic washing behind the isolated bentonite suspension extrusion dehydration, to be squeezed to the pH value be 6.5;
4) last, directly dilute and sodium modification, or dry earlier, dilute again and sodium modification;
Said sodium modification technology: it is 20% that dilute with water disperses bentonite to the mass concentration after the acidification, adding with respect to the bentonite quality is 2% NaOH again, at 50 ℃, reacted 5 hours, after reaction finishes, with bentonite suspension be diluted to mass concentration be 0.1% the modified alta-mud microparticle retention aid.
Embodiment 3:
1) at first, the natural montmorillonite with exploitation carries out then, disperseing below mechanical crushing to 200 order washing, screening removal impurity in water;
2) secondly, regulate the mass concentration to 20% of bentonite suspension, and then to add with respect to the bentonite quality be 10% salpeter solution,, after reaction finishes, separate the impurity of removing precipitation 100 ℃ of reactions 2 hours down;
3) then, with cyclic washing behind the isolated bentonite suspension extrusion dehydration, to be squeezed to the pH value be 3;
4) last, directly dilute and sodium modification, or dry earlier, dilute again and sodium modification;
Said sodium modification technology: it is 50% that dilute with water disperses bentonite to the mass concentration after the acidification, adding with respect to the bentonite quality is 5% sodium chloride again, at 80 ℃, reacted 3 hours, after reaction finishes, with bentonite suspension be diluted to mass concentration be 0.5% the modified alta-mud microparticle retention aid.
Embodiment 4:
1) at first, the natural montmorillonite with exploitation carries out then, disperseing below mechanical crushing to 200 order washing, screening removal impurity in water;
2) secondly, regulate the mass concentration to 30% of bentonite suspension, and then to add with respect to the bentonite quality be 15% acetic acid solution,, after reaction finishes, separate the impurity of removing precipitation 60 ℃ of reactions 8 hours down;
3) then, with cyclic washing behind the isolated bentonite suspension extrusion dehydration, to be squeezed to the pH value be 4;
4) last, directly dilute and sodium modification, or dry earlier, dilute again and sodium modification;
Said sodium modification technology: it is 65% that dilute with water disperses bentonite to the mass concentration after the acidification, adding with respect to the bentonite quality again is 7% sodium carbonate, at 100 ℃, reacted 0.5 hour, after reaction finishes, with bentonite suspension be diluted to mass concentration be 2% the modified alta-mud microparticle retention aid.
Embodiment 5:
1) at first, the natural montmorillonite with exploitation carries out then, disperseing below mechanical crushing to 200 order washing, screening removal impurity in water;
2) secondly, regulate the mass concentration to 40% of bentonite suspension, and then to add with respect to the bentonite quality be 20% sulfuric acid solution,, after reaction finishes, separate the impurity of removing precipitation 80 ℃ of reactions 4 hours down;
3) then, with cyclic washing behind the isolated bentonite suspension extrusion dehydration, to be squeezed to the pH value be 6;
4) last, directly dilute and sodium modification, or dry earlier, dilute again and sodium modification;
Said sodium modification technology: it is 80% that dilute with water disperses bentonite to the mass concentration after the acidification, adding with respect to the bentonite quality again is 10% NaOH, at 60 ℃, reacted 4 hours, after reaction finishes, with bentonite suspension be diluted to mass concentration be 5% the modified alta-mud microparticle retention aid.
Experiment effect: by the first acidifying two step modification methods handled of sodium again, in the bentonite content of effective ingredient montmorillonite be increased to from about 45% about 85%, thereby improved bentonitic serviceability.
Claims (3)
1. the preparation method of a paper grade (stock) modified alta-mud microparticle retention aid is characterized in that:
1) at first, the natural montmorillonite with exploitation carries out then, disperseing below mechanical crushing to 200 order washing, screening removal impurity in water;
2) secondly, regulate mass concentration to 1～40% of bentonite suspension, and then add 1～20% acid solution,, after reaction finishes, separate the impurity of removing precipitation 40～100 ℃ of reactions 2～10 hours down with respect to the bentonite quality;
3) then, with cyclic washing behind the isolated bentonite suspension extrusion dehydration, to be squeezed to the pH value be 3～6.5;
4) last, directly dilute and sodium modification, or dry earlier, dilute again and sodium modification;
Said sodium modification technology: it is 0.1～80% that dilute with water disperses bentonite to the mass concentration after the acidification, adding with respect to the bentonite quality is 0.5～10% sodium salt again, at 20～100 ℃, reacted 0.5～7 hour, after reaction finishes, with bentonite suspension be diluted to mass concentration be 0.01～5% the modified alta-mud microparticle retention aid.
2. the preparation method of paper grade (stock) modified alta-mud microparticle retention aid according to claim 1 is characterized in that: described acid solution is sulfuric acid, hydrochloric acid, nitric acid or acetate.
3. the preparation method of paper grade (stock) modified alta-mud microparticle retention aid according to claim 1 is characterized in that: described sodium salt is sodium carbonate, NaOH or sodium chloride.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102893962A (en) * | 2012-09-25 | 2013-01-30 | 安徽福斯特渔具有限公司 | In-vivo luminous bait |
| CN102907394A (en) * | 2012-09-25 | 2013-02-06 | 安徽福斯特渔具有限公司 | Artificial fish bait having blade wheels |
| CN102907390A (en) * | 2012-09-25 | 2013-02-06 | 安徽福斯特渔具有限公司 | Lifting hole adjustable artificial bait |
| CN102907388A (en) * | 2012-09-25 | 2013-02-06 | 安徽福斯特渔具有限公司 | Artificial bait with electronic sound production |
| CN102907395A (en) * | 2012-09-25 | 2013-02-06 | 安徽福斯特渔具有限公司 | Artificial fish bait having movable flexible tail |
| CN102907391A (en) * | 2012-09-25 | 2013-02-06 | 安徽福斯特渔具有限公司 | Bionic frog bait |
| CN105986509A (en) * | 2016-01-29 | 2016-10-05 | 安徽凤凰滤清器股份有限公司 | Flame-retardant high-temperature-resistant hydraulic filter paper with glass fibers for filters |
| CN106320067A (en) * | 2016-11-02 | 2017-01-11 | 金福英 | Antibacterial retention aid and preparation method thereof |
| CN112012041A (en) * | 2020-07-17 | 2020-12-01 | 浙江理工大学 | Preparation method and application of graphene oxide-bentonite composite particle retention and drainage aid |
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| CN101157016A (en) * | 2007-07-25 | 2008-04-09 | 长兴仁恒精制膨润土有限公司 | A fluid-aid filter aid |
| CN101244828A (en) * | 2007-02-14 | 2008-08-20 | 内蒙古大学 | Method for producing sodium bentonite with calcium bentonite |
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2010
- 2010-10-15 CN CN2010105098154A patent/CN102011337B/en not_active Expired - Fee Related
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| CN101244828A (en) * | 2007-02-14 | 2008-08-20 | 内蒙古大学 | Method for producing sodium bentonite with calcium bentonite |
| CN101157016A (en) * | 2007-07-25 | 2008-04-09 | 长兴仁恒精制膨润土有限公司 | A fluid-aid filter aid |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102893962A (en) * | 2012-09-25 | 2013-01-30 | 安徽福斯特渔具有限公司 | In-vivo luminous bait |
| CN102907394A (en) * | 2012-09-25 | 2013-02-06 | 安徽福斯特渔具有限公司 | Artificial fish bait having blade wheels |
| CN102907390A (en) * | 2012-09-25 | 2013-02-06 | 安徽福斯特渔具有限公司 | Lifting hole adjustable artificial bait |
| CN102907388A (en) * | 2012-09-25 | 2013-02-06 | 安徽福斯特渔具有限公司 | Artificial bait with electronic sound production |
| CN102907395A (en) * | 2012-09-25 | 2013-02-06 | 安徽福斯特渔具有限公司 | Artificial fish bait having movable flexible tail |
| CN102907391A (en) * | 2012-09-25 | 2013-02-06 | 安徽福斯特渔具有限公司 | Bionic frog bait |
| CN102907390B (en) * | 2012-09-25 | 2014-04-09 | 安徽福斯特渔具有限公司 | Lifting hole adjustable artificial bait |
| CN102907395B (en) * | 2012-09-25 | 2014-04-09 | 安徽福斯特渔具有限公司 | Artificial fish bait having movable flexible tail |
| CN102907388B (en) * | 2012-09-25 | 2014-04-09 | 安徽福斯特渔具有限公司 | Artificial bait with electronic sound production |
| CN102907394B (en) * | 2012-09-25 | 2014-04-09 | 安徽福斯特渔具有限公司 | Artificial fish bait having blade wheels |
| CN102907391B (en) * | 2012-09-25 | 2014-04-23 | 安徽福斯特渔具有限公司 | Bionic frog bait |
| CN105986509A (en) * | 2016-01-29 | 2016-10-05 | 安徽凤凰滤清器股份有限公司 | Flame-retardant high-temperature-resistant hydraulic filter paper with glass fibers for filters |
| CN106320067A (en) * | 2016-11-02 | 2017-01-11 | 金福英 | Antibacterial retention aid and preparation method thereof |
| CN112012041A (en) * | 2020-07-17 | 2020-12-01 | 浙江理工大学 | Preparation method and application of graphene oxide-bentonite composite particle retention and drainage aid |
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| CN102011337B (en) | 2011-11-09 |
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