CN101209569A - Composite calcium carbonate and preparation thereof - Google Patents
Composite calcium carbonate and preparation thereof Download PDFInfo
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- CN101209569A CN101209569A CNA2007101728463A CN200710172846A CN101209569A CN 101209569 A CN101209569 A CN 101209569A CN A2007101728463 A CNA2007101728463 A CN A2007101728463A CN 200710172846 A CN200710172846 A CN 200710172846A CN 101209569 A CN101209569 A CN 101209569A
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- calcium carbonate
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- heavy calcium
- whiting
- pulp material
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Abstract
The invention provides a composite calcium carbonate and the preparation method, comprising the steps of (1) the heavy calcium carbonate powder is mixed with water to prepare heavy calcium carbonate pulp material with 35%-75% of the heavy calcium carbonate; a wet-typed ultra-fine stripping machine is adopted to carry out ultra-fine grinding to the heavy calcium carbonate and prepare the heavy calcium carbonate pulp material; after that, acidic solution which is equivalent to 0.2%-2.0% of the weight of the dry powder of the heavy calcium carbonate is added into the pulp material and mixed for 0.5-1.0 hour; filter mass is made through filtration and dehydration and the pulp material is made by adding water; ammonium salt solution is added into the pulp material and mixed to obtain activated heavy calcium pulp material; (2) the calvital pulp material is added into the activated heavy calcium pulp and carbon dioxide gas is added into the heavy calcium pulp material; when the pH value is 6-7 through carbonization, the calcium carbonate pulp material compounded by heavy calcium and light calcium is obtained. The composite calcium carbonate which is prepared by the invention has the respective advantages of heavy calcium carbonate and light calcium carbonate.
Description
Technical field
The present invention relates to a kind of calcium carbonate and preparation method thereof.
Background technology
The adding filler can improve paper in the papermaking opacity and brightness improve smoothness of paper and uniform state, increase the flexibility of paper, reduce the hygroscopicity and the deformation extent of paper, also help simultaneously to reduce production costs.Titanium dioxide has high index of refraction and scattering coefficient, is good papermaking filler, but because it costs an arm and a leg, generally only is used for high-grade thin page or leaf printing paper, to improve the opacity of paper.
And calcium carbonate is cheap owing to it, and can improve the opacity of paper, the oil suction performance of ink of increase paper equally, has certain cost advantage as papermaking filler.
Along with acid papermaking changes to neutral papermaking, calcium carbonate becomes the important raw and processed materials that Chinese paper industry improves paper quality, reduces the papermaking cost day by day.Coarse whiting and the fine particle calcium carbonate effect in paper has bigger difference: fine particle calcium carbonate and coarse whiting are copied the pattern whiteness and are more or less the same, and both whiteness are all higher; But aspect opacity, the opacity of pattern that fine particle calcium carbonate is copied is higher, can improve the opacity of page behind the adding fine particle calcium carbonate.With its bulk of pattern that fine particle calcium carbonate is copied apparently higher than coarse whiting; The average grain diameter of fine particle calcium carbonate is little than coarse whiting, correspondingly has bigger specific area, and is stronger than coarse whiting to the suction-operated of AKD sizing agent, thereby the amount ratio coarse whiting of AKD sizing agent is big.When identical amount of filler, fine particle calcium carbonate mainly is because the particle diameter of coarse whiting is little than the ash content height of coarse whiting, and when the page dehydration was shaped, it is poor that fiber is held back fine particle; Though and the particle diameter of fine particle calcium carbonate is also very little, fine particle calcium carbonate is agglomerated into bigger particle easily, and paper fibre is had good bridging action, so be better than coarse whiting at fine particle calcium carbonate aspect the ash content reservation; In addition, the powdered whiting particle diameter is little and be the cubic structure mostly, and precipitated calcium carbonate is more serious than precipitated calcium carbonate to the wearing and tearing of net relatively.But the stability of the pH value of powdered whiting is than precipitated calcium carbonate height; The powdered whiting low price, in the process energy resource consumption low, and precipitated calcium carbonate price height, in the process energy resource consumption big, consume a large amount of anthracites in the production process.So the application in papermaking of powdered whiting and precipitated calcium carbonate respectively has pluses and minuses, how the advantages with the two is the key of dealing with problems together.
Pigment particles of Chinese patent CN 1217007 coated with precipitated calcium carbonate and preparation method thereof, introduced kaolin, natural whiting or titanium dioxide water have been made slurry, pH value of slurry is transferred to 6-11 then, adding grain diameter in slurry is the light calcium carbonate slurry of 30-100nm, make the precipitated calcium carbonate particle be coated in kaolin, natural whiting or titanium dioxide surface by absorption, obtain coated with precipitated calcium carbonate pigment, can be used for papermaking filler and papermaking pigment.New type of paper filler that Chinese patent CN 1335874 is treated or pigment or mineral matter, particularly contain pigment, its manufacture method and the composition and the application of natural whiting, introduced marble, calcite, chalk or the carbonate that contains dolomite have been prepared into water slurry, in water slurry, add sulfuric acid, hydrochloric acid, phosphoric acid or oxalic acid, in water slurry, feed carbon dioxide then, obtain containing the pigment of natural whiting, this pigment can reduce the paper weight of constant surface area.
But, the existing defective of above-mentioned technology is that the fine particle calcium carbonate that is generated can not combine well with coarse whiting, and fine particle calcium carbonate combines rate with coarse whiting not high, and most of fine particle calcium carbonates are free between the coarse whiting particle, so its effect mixes with fine particle calcium carbonate and coarse whiting to use difference is arranged, but difference is little.
Summary of the invention
The purpose of this invention is to provide a kind of composite calcium carbonate and preparation method thereof, to overcome the above-mentioned defective that prior art exists.
Method of the present invention comprises the steps:
(1) 100～600 order heavy calcium carbonates and water are mixed, the content that is made into powdered whiting is 35～75% heavy calcium carbonate slurry, adopt the ultra-fine machine of delaminating of wet type that powdered whiting is carried out ultra-fine mill then, make heavy calcium carbonate slurry, wherein, particle is 20～60% less than the weight content of the powdered whiting of 2 μ m;
The ultra-fine machine of delaminating of said wet type is the general equipment in this area, and the trade mark of producing as company of double leaf fine chemistry industry machinery Co., Ltd is the ultra-fine machine of delaminating of wet type of BP series;
In slurry, add then working as in the acid solution of ground whiting dry powder weight 0.2～2.0%, stirred 0.5～1.0 hour, filtering means dehydration is made filter cake, then water is added filter cake, make weight concentration and be 25～40% slurry, in slurry, add, stirred the coarse whiting slurry that obtains activating again 0.5～1.0 hour when in the ammonium salt solution of ground whiting dry powder weight 0.1～2.0%;
(2) add calcium hydroxide slurry in the coarse whiting slurry after the activation, the entire body volume concentrations is 10～100% carbon dioxides in the coarse whiting slurry again, and when carbonization was 6-7 to the pH value, the carbonization end obtained the compound calcium carbonate slurry of coarse whiting and fine particle calcium carbonate.Carburizing temperature for example can be carried out carbonization at normal temperatures to not influence of result.
Described acid solution is selected from one or more in hydrochloric acid, nitric acid or the acetic acid, and the weight concentration of acid solution is 10---30%;
Described ammonium salt solution is selected from one or more in ammonium chloride, ammonium nitrate, ammonium carbonate or the carbonic hydroammonium, and the weight concentration of ammonium salt solution is 5---20%;
Described calcium hydroxide slurry, its addition is the 10-80% of activation coarse whiting weight, and addition all is as the criterion with butt, and said butt refers to oven dry weight, and calcium hydroxide slurry concentration is 5-40%.
The compound calcium carbonate slurry of method for preparing can directly be used as papermaking filler, also can further dewater and make filter cake, and filter cake can be used as papermaking filler; Also filtration cakes torrefaction, pulverizing can be made compound calcium carbonate powder, as papermaking filler.
The present invention adds hydrochloric acid, nitric acid or acetic acid in heavy calcium carbonate slurry, hydrochloric acid, nitric acid or acetic acid and powdered whiting particle surface react, remove the inactive outermost layer of powdered whiting particle surface, fresh active high nexine surface is revealed.In heavy calcium carbonate slurry, add ammonium chloride, ammonium nitrate, ammonium carbonate or ammonium bicarbonate soln then, ammonium ion in ammonium chloride, ammonium nitrate, ammonium carbonate or the ammonium bicarbonate soln has positive charge, be easy to be adsorbed onto electronegative powdered whiting particle surface, make the positive charge on powdered whiting particle surface band top.In heavy calcium carbonate slurry, add calcium hydroxide slurry then, logical again carbon dioxide containing gas, carbon dioxide and calcium hydroxide reaction generate tiny calcium carbonate granule, because of tiny calcium carbonate granule electronegative, be easy to be adsorbed onto on the positively charged part of powdered whiting particle surface, thereby constantly grow as nucleus.So the composite calcium carbonate of present technique preparation has powdered whiting and precipitated calcium carbonate advantage separately.
The specific embodiment
Embodiment 1
3.0 ton of 200 order heavy calcium carbonate joined in 5.0 tons of deionized waters, stir and make slurry, fully stir, make slurry obtain good flowability.With pump slurry is sent into 300 liters of machines of delaminating then, powdered whiting is ground, make heavy calcium carbonate slurry, wherein less than 2 μ m content 40% with the machine of delaminating.In making heavy calcium carbonate slurry, add the 12kg weight concentration then and be 10% hydrochloric acid solution, stirred 1 hour, with plate and frame filter press slurry is carried out filtering means dehydration, make the powdered whiting filter cake, then filter cake is added 5.0 tons of deionized water and stirring and make slurry, adding 10kg weight concentration is 10% ammonium chloride solution in slurry, stirs the coarse whiting slurry that obtains activating again 0.5 hour.The calcium hydroxide slurry that adds 5 tons of weight concentrations 10% in the coarse whiting slurry after the activation, in the coarse whiting slurry, feed volume 25% carbon dioxide gas mixture again, carbonization to pH value is 6.8 o'clock, and carbonization finishes, and obtaining concentration is 17.2 tons in 20% composite calcium carbonate slurry.
Embodiment 2
3.0 ton of 200 order heavy calcium carbonate joined in 3.0 tons of deionized waters, stir and make slurry, fully stir, make slurry obtain good flowability.With pump slurry is sent into 300 liters of machines of delaminating then, powdered whiting is ground, make heavy calcium carbonate slurry, wherein less than 2 μ m content 30% with the machine of delaminating.In making heavy calcium carbonate slurry, add the 35kg weight concentration then and be 30% salpeter solution, stirred 40 minutes, with plate and frame filter press slurry is carried out filtering means dehydration, make the powdered whiting filter cake, then filter cake is added 3.0 tons of deionized water and stirring and make slurry, adding 24kg weight concentration is 5% sal volatile in slurry, stirs the coarse whiting slurry that obtains activating again 1 hour.The calcium hydroxide slurry that adds 10 tons of weight concentrations 12% in the coarse whiting slurry after the activation, in the coarse whiting slurry, feed volumetric concentration 27% carbon dioxide gas mixture again, carbonization to pH value is 6.5 o'clock, and carbonization finishes, and obtaining concentration is 19.1 tons in 24% composite calcium carbonate slurry.
Embodiment 3
3.0 ton of 500 order heavy calcium carbonate joined in 2.0 tons of deionized waters, stir and make slurry, fully stir, make slurry obtain good flowability.With pump slurry is sent into 300 liters of machines of delaminating then, powdered whiting is ground, make heavy calcium carbonate slurry, wherein less than 2 μ m content 20% with the machine of delaminating.In making heavy calcium carbonate slurry, add the 28kg weight concentration then and be 20% acetum, stirred 40 minutes, with plate and frame filter press slurry is carried out filtering means dehydration, make the powdered whiting filter cake, then filter cake is added 1.5 tons of deionized water and stirring and make slurry, adding 20kg weight concentration is 10% ammonium nitrate solution in slurry, stirs the coarse whiting slurry that obtains activating again 45 minutes.The calcium hydroxide slurry that adds 8 tons of weight concentrations 22% in the coarse whiting slurry after the activation, in the coarse whiting slurry, feed volumetric concentration 31% carbon dioxide gas mixture again, carbonization to pH value is 7.5 o'clock, carbonization finishes, obtaining concentration is 14.4 tons in 32% composite calcium carbonate slurry, with composite calcium carbonate slurry plate and frame filter press filtering means dehydration, obtain content and be 8.2 tons of 56% composite calcium carbonate filter cakes.
Embodiment 4
3.0 ton of 100 order heavy calcium carbonate joined in 1.5 tons of deionized waters, stir and make slurry, fully stir, make slurry obtain good flowability.With pump slurry is sent into 300 liters of machines of delaminating then, powdered whiting is ground, make heavy calcium carbonate slurry, wherein less than 2 μ m content 60% with the machine of delaminating.In making heavy calcium carbonate slurry, add the 15kg weight concentration then and be 320% acetum, stirred 35 minutes, with plate and frame filter press slurry is carried out filtering means dehydration, make the powdered whiting filter cake, then filter cake is added 3.5 tons of deionized water and stirring and make slurry, adding 42kg weight concentration is 18% ammonium bicarbonate soln in slurry, stirs the coarse whiting slurry that obtains activating again 55 minutes.The calcium hydroxide slurry that adds 15 tons of weight concentrations 15% in the coarse whiting slurry after the activation, in the coarse whiting slurry, feed volumetric concentration 95% carbon dioxide again, carbonization to pH value is 7.1 o'clock, carbonization finishes, obtaining concentration is 22.8 tons in 22% composite calcium carbonate slurry, with composite calcium carbonate slurry plate and frame filter press filtering means dehydration, obtain content and be 8.7 tons of 58% composite calcium carbonate filter cakes.
Embodiment 5
3.0 ton of 300 order heavy calcium carbonate joined in 2.5 tons of deionized waters, stir and make slurry, fully stir, make slurry obtain good flowability.With pump slurry is sent into 300 liters of machines of delaminating then, powdered whiting is ground, make heavy calcium carbonate slurry, wherein less than 2 μ m content 50% with the machine of delaminating.In making heavy calcium carbonate slurry, add the 70kg weight concentration then and be 18% acetum, stirred 40 minutes, with plate and frame filter press slurry is carried out filtering means dehydration, make the powdered whiting filter cake, then filter cake is added 2.5 tons of deionized water and stirring and make slurry, adding 80kg weight concentration is 19% ammonium chloride solution in slurry, stirs the coarse whiting slurry that obtains activating again 50 minutes.The calcium hydroxide slurry that adds 18 tons of weight concentrations 16% in the coarse whiting slurry after the activation, in the coarse whiting slurry, feed volumetric concentration 28% carbon dioxide gas mixture again, carbonization to pH value is 7.5 o'clock, and carbonization finishes, and obtaining concentration is 25.7 tons in 22% composite calcium carbonate slurry.
Embodiment 6
With 1880 fourdrinier wire multi-cylinder culture papers, replace common coarse whiting and common fine particle calcium carbonate to be used for wood-free paper production with composite calcium carbonate, investigate the manufacture paper with pulp influence of process of papermaking, the variation of white water consistency, machine water concentration, initial journey retention rate, bulk, opacity.
Experiment condition:
Paper machine type, 1880 fourdrinier wire multi-cylinder culture papers;
Produce the paper kind, 70g/m
2Wood-free paper;
Filler, composite calcium carbonate; Common coarse whiting; Common fine particle calcium carbonate;
The results are shown in following table:
By above contrast test as can be seen: under quantitatively identical situation, products obtained therefrom of the present invention is compared with common coarse whiting, and initial journey retention, filler retention, bulk, opacity obviously increase; And white water consistency, machine water concentration obviously reduce.
In quantitatively identical situation, products obtained therefrom of the present invention is compared with common fine particle calcium carbonate, and bulk is basic Identical; Opacity, first-pass retention, filler retention improve, white water consistency, net Lower plain boiled water also has certain reduction. So products obtained therefrom of the present invention has overcome fine particle calcium carbonate and coarse whiting shortcoming, hold concurrently The advantage that fine particle calcium carbonate and coarse whiting are arranged.
Claims (6)
1. the preparation method of a composite calcium carbonate is characterized in that, comprises the steps:
(1) heavy calcium carbonate and water are mixed, the weight content that is made into powdered whiting is 35～75% heavy calcium carbonate slurry, adopts the ultra-fine machine of delaminating of wet type that powdered whiting is carried out ultra-fine mill then, makes heavy calcium carbonate slurry;
In slurry, add the acid solution that is equivalent to ground whiting dry powder weight 0.2～2.0% then, stirred 0.5～1.0 hour, filtering means dehydration is made filter cake, then water is added filter cake and make slurry, in slurry, add the ammonium salt solution that is equivalent to ground whiting dry powder weight 0.1～2.0%, stirred the coarse whiting slurry that obtains activating again 0.5～1.0 hour;
(2) add calcium hydroxide slurry in the coarse whiting slurry after the activation, the entire body volume concentrations is 10～100% carbon dioxides in the coarse whiting slurry again, and when carbonization was 6-7 to the pH value, the carbonization end obtained the compound calcium carbonate slurry of coarse whiting and fine particle calcium carbonate.
2. method according to claim 1 is characterized in that, the granularity of heavy calcium carbonate is 100～600 orders.
3. method according to claim 1 is characterized in that, step (1) makes heavy calcium carbonate slurry, and wherein, particle is 20～60% less than the weight content of the powdered whiting of 2 μ m.
4. method according to claim 1 is characterized in that described acid solution is selected from one or more in hydrochloric acid, nitric acid or the acetic acid; Described ammonium salt solution is selected from one or more in ammonium chloride, ammonium nitrate, ammonium carbonate or the carbonic hydroammonium; Described calcium hydroxide slurry, its addition is the 10-80% of activation coarse whiting weight, addition all is as the criterion with butt.
5. according to the composite calcium carbonate of each described method preparation of claim 1～4.
6. the application of composite calcium carbonate according to claim 5 is characterized in that, as papermaking filler.
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| CNB2007101728463A CN100572662C (en) | 2007-12-24 | 2007-12-24 | A kind of composite calcium carbonate and preparation method thereof |
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| CNB2007101728463A CN100572662C (en) | 2007-12-24 | 2007-12-24 | A kind of composite calcium carbonate and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101456969B (en) * | 2008-12-29 | 2011-11-09 | 南京协和化学有限公司 | Functional calcium carbonate and method for producing the same |
| CN101514265B (en) * | 2008-12-30 | 2012-01-25 | 上海东升新材料有限公司 | Mixed calcium carbonate, preparation method and application thereof |
| CN104910413A (en) * | 2015-05-28 | 2015-09-16 | 青阳县恒源化工原料有限责任公司 | High-plasticity heavy active calcium carbonate |
| CN106830041A (en) * | 2017-01-19 | 2017-06-13 | 井陉县华北碳酸钙有限公司 | A kind of preparation method of functional calcium carbonate |
| CN106978277A (en) * | 2017-05-06 | 2017-07-25 | 山西兰花华明纳米材料股份有限公司 | A kind of preparation method of screw cleaning agent calcium carbonate |
| CN107446384A (en) * | 2017-08-10 | 2017-12-08 | 青阳县永诚钙业有限责任公司 | A kind of preparation method of composite calcium carbonate |
-
2007
- 2007-12-24 CN CNB2007101728463A patent/CN100572662C/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101456969B (en) * | 2008-12-29 | 2011-11-09 | 南京协和化学有限公司 | Functional calcium carbonate and method for producing the same |
| CN101514265B (en) * | 2008-12-30 | 2012-01-25 | 上海东升新材料有限公司 | Mixed calcium carbonate, preparation method and application thereof |
| CN104910413A (en) * | 2015-05-28 | 2015-09-16 | 青阳县恒源化工原料有限责任公司 | High-plasticity heavy active calcium carbonate |
| CN106830041A (en) * | 2017-01-19 | 2017-06-13 | 井陉县华北碳酸钙有限公司 | A kind of preparation method of functional calcium carbonate |
| CN106830041B (en) * | 2017-01-19 | 2018-11-06 | 井陉县华北碳酸钙有限公司 | A kind of preparation method of functional calcium carbonate |
| CN106978277A (en) * | 2017-05-06 | 2017-07-25 | 山西兰花华明纳米材料股份有限公司 | A kind of preparation method of screw cleaning agent calcium carbonate |
| CN106978277B (en) * | 2017-05-06 | 2019-07-23 | 山西兰花华明纳米材料股份有限公司 | A kind of preparation method of screw cleaning agent calcium carbonate |
| CN107446384A (en) * | 2017-08-10 | 2017-12-08 | 青阳县永诚钙业有限责任公司 | A kind of preparation method of composite calcium carbonate |
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| CN100572662C (en) | 2009-12-23 |
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Denomination of invention: Composite calcium carbonate and preparation thereof Effective date of registration: 20191225 Granted publication date: 20091223 Pledgee: Bank of Hangzhou, Limited by Share Ltd, Shanghai branch Pledgor: Shanghai Dongsheng New Materials Co., Ltd. Registration number: Y2019310000035 |
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Date of cancellation: 20210813 Granted publication date: 20091223 Pledgee: Bank of Hangzhou Limited by Share Ltd. Shanghai branch Pledgor: SHANDONG DONGSHENG NEW MATERIAL Co.,Ltd. Registration number: Y2019310000035 |