CN106320065B - A kind of preparation method of high solids content talcum powder and heavy calcium carbonate slurry - Google Patents
A kind of preparation method of high solids content talcum powder and heavy calcium carbonate slurry Download PDFInfo
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- CN106320065B CN106320065B CN201510367614.8A CN201510367614A CN106320065B CN 106320065 B CN106320065 B CN 106320065B CN 201510367614 A CN201510367614 A CN 201510367614A CN 106320065 B CN106320065 B CN 106320065B
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- talcum powder
- calcium carbonate
- heavy calcium
- solids content
- high solids
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Abstract
The invention discloses the preparation method of a kind of high solids content talcum powder and heavy calcium carbonate slurry, comprise the following steps：The first step, talcum powder and heavy calcium carbonate are according to (0.1 0.2：1) mass parts ratio, water, 0.14wt% 5034 dispersants, the sodium hydroxides of 0.07 0.1wt ‰ is added in reactor and are configured to liquid medium, added talcum powder and add in reactor, machine mixer is stirred 5 minutes with 500 700 revs/min；Second step, powdered whiting is added in aforesaid reaction vessel while stirring；3rd step, 0.02wt% emulsifying agents, the Sodium Polyacrylates of 0.015 0.02wt ‰ are added in aforesaid reaction vessel, mixer is stirred 10 minutes with 500 700 revs/min.The preparation method of the present invention, the method that four kinds of modifying agent is added using substep modified powder, substep, with modifying agent addition is few, high stability, be uniformly dispersed, good water-retaining property the characteristics of, high solids content talcum powder and heavy calcium carbonate slurry can be successfully prepared, and the slurry is applied to alkaline pulp.
Description
Technical field
The present invention relates to inorganic particle applied technical field, more particularly to a kind of high solids content talcum powder and heavy carbonic acid
The preparation method of calcium powder slurry.
Background technology
Calcium carbonate is a kind of important inorganic filler, is widely used in rubber, plastics, papermaking, paint, ink, coating, viscous
The industries such as mixture, cosmetics, food and medicine.For powdered whiting because particle diameter is smaller, specific surface area is big, and specific surface energy is high, easily
Aggregation is formed, dispersive property is poor, and direct application effect is bad, therefore, in actual applications, needs to carry out precipitated calcium carbonate
Surface treatment, to improve its performance.
Main application of the talcum powder in papermaking is used as filler, is that the current country uses to obtain widest papermaking filler,
Main production glazed paper, writing paper, magazine paper etc..Because the surface property of talcum powder is relatively low, its surface parent's air and hydrophobic, gas
Gu two connect can interfacial tension be less than liquid-solid two-phase interfacial tension.So talcum powder is not easy air and is readily wetted by water, thus
Its dispersiveness is influenceed, so as to constrain its keeping on fiber.Improve the retention of talcum powder, it is necessary to allow talcum powder
Surface acquisition is good and sufficiently lubricious, and changes its surface charge, enables it to fully dispersed in paper pulp and (logical with fiber
Cross retention agent) complexing occurs and wads a quilt with cotton poly-.Therefore, such as with talcum powder as filler and reach the purpose of high retention rate, it has to be noted that add
The selection of skill is processed, using filler pre-treatment system.
Document shows：1. a pair filler powder is modified, the addition of modifying agent is mostly more than 1% (with the matter of powder
On the basis of amount), 20% is even up to, excessive modifying agent is kept to the paper stock of paper making wet part to have a negative impact.2. reconcile
The pH value of paper pulp can suppress the dissolving of alkaline filler powder, but pH value can produce " fiber alkaline darkening " effect more than 10 more than 8
Should.3. filler is set to have preferable dispersiveness in paper pulp using modifying agent.
The content of the invention
The defects of in order to overcome above-mentioned prior art problem, the present invention proposes a kind of high solids content talcum powder and heavy carbonic acid
The preparation method of calcium powder slurry, this method have few modifying agent addition, high stability, be uniformly dispersed, good water-retaining property the characteristics of,
Talcum powder and heavy calcium carbonate slurry that high solids content reaches 70wt% can be successfully prepared, and the slurry is applicable to alkalescence
Paper pulp.
The required technical problem solved of the invention can be achieved through the following technical solutions：
A kind of preparation method of high solids content talcum powder and heavy calcium carbonate slurry, comprises the following steps：
The first step, using the gross mass of talcum powder and heavy calcium carbonate as radix, talcum powder and heavy calcium carbonate according to
(0.1-0.2：1) mass parts ratio, water, 0.14wt% 5034 dispersants, the sodium hydroxides of 0.07-0.1wt ‰ are added anti-
Answer and liquid medium is configured in kettle, add talcum powder and add in reactor, machine mixer stirs 5 points with 500-700 revs/min
Clock；
Second step, powdered whiting is added in aforesaid reaction vessel while stirring；
3rd step, 0.02wt% emulsifying agents, the Sodium Polyacrylates of 0.015-0.02wt ‰ are added in aforesaid reaction vessel, stirring
Machine is stirred 10 minutes with 500-700 revs/min, is obtained high solids content talcum powder and heavy calcium carbonate slurry.
Further, the molecular weight of the Sodium Polyacrylate is 100,000.
Further, the solid content of the high solids content talcum powder and heavy calcium carbonate slurry is 70%.
Present invention has the advantages that：A kind of preparation method of high solids content talcum powder and heavy calcium carbonate slurry, use
The method that substep modified powder, substep add four kinds of modifying agent, can prepare with modifying agent addition is few, high stability,
It is uniformly dispersed, the high solids content talcum powder and heavy calcium carbonate slurry of good water-retaining property, and the slurry is applied to alkaline pulp.
Embodiment
Embodiment 1：
A kind of preparation method of high solids content talcum powder and heavy calcium carbonate slurry, comprises the following steps：
The first step, using the gross mass of talcum powder and heavy calcium carbonate as radix, talcum powder and heavy calcium carbonate according to
(0.1：1) mass parts ratio, water, 0.14wt% 5034 dispersants, the sodium hydroxides of 0.07wt ‰ is added in reactor and matched somebody with somebody
Liquid medium is set to, talcum powder is added and adds in reactor, machine mixer is stirred 5 minutes with 500-700 revs/min；
Second step, powdered whiting is added in aforesaid reaction vessel while stirring；
3rd step, by 0.02wt% emulsifying agents, the Sodium Polyacrylates of 0.015wt ‰ add aforesaid reaction vessel in, mixer with
500-700 revs/min, stir 10 minutes, obtain high solids content talcum powder and heavy calcium carbonate slurry.The molecule of Sodium Polyacrylate
Amount can be 100,000.The solid content of high solids content talcum powder and heavy calcium carbonate slurry can reach 70%.
PH=9, the slurry that viscosity is 290mPas are settled in 100ml graduated cylinders, and 4ml has been settled after 1 day, has been settled after 2 days
5.5ml.
Embodiment 2：
A kind of preparation method of high solids content talcum powder and heavy calcium carbonate slurry, comprises the following steps：
The first step, using the gross mass of talcum powder and heavy calcium carbonate as radix, talcum powder and heavy calcium carbonate according to
(0.15：1) mass parts ratio, water, 0.14wt% 5034 dispersants, the sodium hydroxides of 0.08wt ‰ is added in reactor and matched somebody with somebody
Liquid medium is set to, talcum powder is added and adds in reactor, machine mixer is stirred 5 minutes with 500-700 revs/min；
Second step, powdered whiting is added in aforesaid reaction vessel while stirring；
3rd step, by 0.02wt% emulsifying agents, the Sodium Polyacrylates of 0.018wt ‰ add aforesaid reaction vessel in, mixer with
500-700 revs/min, stir 10 minutes, obtain high solids content talcum powder and heavy calcium carbonate slurry.The molecule of Sodium Polyacrylate
Amount can be 100,000.The solid content of high solids content talcum powder and heavy calcium carbonate slurry can reach 70%.
PH=9, the slurry that viscosity is 305mPas are settled in 100ml graduated cylinders, and 4ml has been settled after 1 day, has been settled after 2 days
6ml.
Embodiment 3：
A kind of preparation method of high solids content talcum powder and heavy calcium carbonate slurry, comprises the following steps：
The first step, using the gross mass of talcum powder and heavy calcium carbonate as radix, talcum powder and heavy calcium carbonate according to
(0.2：1) mass parts ratio, water, 0.14wt% 5034 dispersants, the sodium hydroxides of 0.1wt ‰ are added in reactor and configured
Into liquid medium, add talcum powder and add in reactor, machine mixer is stirred 5 minutes with 500-700 revs/min；
Second step, powdered whiting is added in aforesaid reaction vessel while stirring；
3rd step, by 0.02wt% emulsifying agents, the Sodium Polyacrylates of 0.02wt ‰ add aforesaid reaction vessel in, mixer with
500-700 revs/min, stir 10 minutes, obtain high solids content talcum powder and heavy calcium carbonate slurry.The molecule of Sodium Polyacrylate
Amount can be 100,000.By 5034 dispersants, sodium hydroxide, OP (C34H62O11) emulsifying agent, Sodium Polyacrylate these four addition
The addition of agent, by four effect of joining in a common effort, it can realize two kinds of powders of talcum powder and powdered whiting in aqueous phase system
Solid content reaches 70%.
PH=9, the slurry that viscosity is 288mPas are settled in 100ml graduated cylinders, and 3.5ml has been settled after 1 day, has been sunk after 2 days
5.5ml has dropped.
According to steric hindrance electrostatic stabilization mechanism, using 5034 modifying agent that charge density is high, molecular weight is appropriate, talcum is coated
Powder, hydrophobicity talcum particles are changed into hydrophily, and produce repulsive interaction, and a small amount of sodium hydroxide makes the molecule of 5034 modifying agent
Chain is stably coated on the surface of talcum powder.The calcium carbonate powder granular absorption added afterwards is around talcum powder.Meanwhile
Under stirring action, two kinds of hydrophilic particles are uniformly dispersed.After adding emulsifying agent so that slurry water and milk is compatible, the liquid phase in slurry
Dielectric distribution is uniform.Finally adding the appropriate PMMA of molecular weight so that PMMA is further adsorbed on talcum powder and powdered whiting surface,
Particle produces powerful steric hindrance effect and keeps stable, it is often more important that PMMA is adsorbed in particle surface, its strand
There is winding, its strand space is small, there is certain inhibition to hydrone, and it is too fast that slurry is unlikely to dehydration, and it is dry and hard to produce surface.
By the process of preparing of the present invention, talcum powder can be made to be changed into hydrophily, and adsorbed simultaneously in right amount with calcium carbonate
Modifying agent, so as to obtain few addition, high stability, be uniformly dispersed, the talcum powder of good water-retaining property and heavy calcium carbonate slurry.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described in above-mentioned technical proposal.One's own profession
For the personnel of industry it should be appreciated that the present invention is not limited to the above embodiments, described in above-described embodiment and specification is to say
Bright principle of the invention, various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention, this
A little changes and improvements all fall within the protetion scope of the claimed invention.
Claims (3)
- A kind of 1. preparation method of high solids content talcum powder and heavy calcium carbonate slurry, it is characterised in that preparation method include with Lower step：The first step, using the gross mass of talcum powder and heavy calcium carbonate as radix, talcum powder and heavy calcium carbonate are according to (0.1- 0.2：1) mass parts ratio, water, 0.14wt% 5034 dispersants, the sodium hydroxides of 0.07-0.1wt ‰ are added in reactor Liquid medium is configured to, talcum powder is added and adds in reactor, machine mixer is stirred 5 minutes with 500-700 revs/min；Second step, powdered whiting is added in aforesaid reaction vessel while stirring；3rd step, by 0.02wt% emulsifying agents, the Sodium Polyacrylates of 0.015-0.02wt ‰ add aforesaid reaction vessel in, mixer with 500-700 revs/min, stir 10 minutes, obtain high solids content talcum powder and heavy calcium carbonate slurry.
- 2. according to the preparation method of a kind of high solids content talcum powder and heavy calcium carbonate slurry described in claim 1, it is special Sign is：The molecular weight of the Sodium Polyacrylate is 100,000.
- 3. according to the preparation method of a kind of high solids content talcum powder and heavy calcium carbonate slurry described in claim 1, it is special Sign is：The solid content of the high solids content talcum powder and heavy calcium carbonate slurry is 70%.
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| CN106320065B true CN106320065B (en) | 2018-03-27 |
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| CN113861725A (en) * | 2021-10-19 | 2021-12-31 | 中科乐美科技集团有限公司 | Preparation method of calcium carbonate/talcum powder composite material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1203192A (en) * | 1998-05-08 | 1998-12-30 | 国家非金属矿深加工工程技术研究中心 | Process for surface modification of calcium carbonate and talk |
| CN101282909A (en) * | 2005-09-16 | 2008-10-08 | 欧米亚发展股份公司 | Process of manufacturing very fine co-ground calcium carbonate material of the gcc and pcc type, obtained products and their uses |
| CN102912672A (en) * | 2011-08-01 | 2013-02-06 | 池州学院 | Preparation method for fluid calcium carbonate slurry with high solid content of 50% used for high-grade paper industry |
| CN104341798A (en) * | 2014-04-15 | 2015-02-11 | 池州市大恒生化有限公司 | Modified fine heavy calcium carbonate |
| CN104650623A (en) * | 2015-01-30 | 2015-05-27 | 苗汉陟 | Modified heavy calcium carbonate and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2894846B1 (en) * | 2005-12-20 | 2008-02-01 | Coatex Sas | USE OF DISPERSANTS FOR CONCENTRATING MINERALS IN WATER, DISPERSIONS OBTAINED AND USES THEREOF. |
-
2015
- 2015-06-26 CN CN201510367614.8A patent/CN106320065B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1203192A (en) * | 1998-05-08 | 1998-12-30 | 国家非金属矿深加工工程技术研究中心 | Process for surface modification of calcium carbonate and talk |
| CN101282909A (en) * | 2005-09-16 | 2008-10-08 | 欧米亚发展股份公司 | Process of manufacturing very fine co-ground calcium carbonate material of the gcc and pcc type, obtained products and their uses |
| CN102912672A (en) * | 2011-08-01 | 2013-02-06 | 池州学院 | Preparation method for fluid calcium carbonate slurry with high solid content of 50% used for high-grade paper industry |
| CN104341798A (en) * | 2014-04-15 | 2015-02-11 | 池州市大恒生化有限公司 | Modified fine heavy calcium carbonate |
| CN104650623A (en) * | 2015-01-30 | 2015-05-27 | 苗汉陟 | Modified heavy calcium carbonate and preparation method thereof |
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Address after: 247100 No. 169 Jianxi Road, Guichi District, Chizhou, Anhui. Co-patentee after: Chizhou Jinyi New Material Co.,Ltd. Patentee after: CHIZHOU University Address before: 247100 Chizhou Institute of scientific research, No. 1 Education Park, Anhui, Chizhou Co-patentee before: CHIZHOU JINYI CHEMICAL Co.,Ltd. Patentee before: CHIZHOU University |
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Effective date of registration: 20200720 Address after: 247100 Industrial Zone, Guichi District, Anhui, Chizhou Patentee after: Chizhou Jinyi New Material Co.,Ltd. Address before: 247100 No. 169 Jianxi Road, Guichi District, Chizhou, Anhui. Co-patentee before: Chizhou Jinyi New Material Co.,Ltd. Patentee before: CHIZHOU University |
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