CN101417808B - Method for preparing silicon dioxide thickening agents for toothpaste - Google Patents
Method for preparing silicon dioxide thickening agents for toothpaste Download PDFInfo
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- CN101417808B CN101417808B CN2008101538213A CN200810153821A CN101417808B CN 101417808 B CN101417808 B CN 101417808B CN 2008101538213 A CN2008101538213 A CN 2008101538213A CN 200810153821 A CN200810153821 A CN 200810153821A CN 101417808 B CN101417808 B CN 101417808B
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- dilute solution
- silicon dioxide
- souring agent
- thickening agents
- alkalimetal silicate
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Abstract
The invention discloses a preparation method for a silicon dioxide thickener used by toothpaste, which is characterized in that sodium monoflurophosphate is adopted as a constitution controller in the preparation process of the product, and the final crashing procedure is eliminated from the technological process. The product obtained by the invention has the advantages of stable and reliable product index, energy saving and consumption reduction in the technological process, cost saving and easy industrialization.
Description
Technical field
The invention belongs to a kind of preparation method of thickening material, be specifically related to a kind of preparation method of silicon dioxide thickening agents for toothpaste.
Background technology
Silicon-dioxide mainly is to provide good pseudo-plasticity and thixotropy for lotion as the toothpaste thickening material, play a part tackify and stable lotion, increase the lotion apparent viscosity, heavier friction agent and polishing particles can suspend, the solid-liquid component is separated in the prevention toothpaste, this type of silicon-dioxide generally is median particle diameter at 11-14 μ m, the DOP oil-absorption(number) high structure precipitated silica of low density at 225-235ml/100g.
At present, the preparation method of silicon dioxide thickening agents for toothpaste is in pre-heated water and stream adds alkalimetal silicate and souring agent, the preferred water glass of alkalimetal silicate, souring agent can be sulfuric acid, nitric acid, hydrochloric acid, phosphoric acid etc., preferably sulfuric acid is kept temperature of reaction and pH value within the specific limits.Add a certain amount of sodium sulfate, Tai-Ace S 150, Sodium phosphate dibasic, SODIUM PHOSPHATE, MONOBASIC in the neutralization reaction process, neutralization reaction is finished the post curing certain hour in good time, and adding souring agent then, to be acidified to pH value be certain limit, and continuation is worn out for some time.The gained silica suspension through separation, washing, drying and after pulverizing, is obtained silicon dioxide thickening agents for toothpaste.
But the silicon dioxide thickening agents product index instability of method for preparing, technological process need accurately control, and product energy consumption is big, cost is higher.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned technology, a kind of preparation method of silicon dioxide thickening agents for toothpaste is provided.
For achieving the above object, the technical solution adopted in the present invention is as follows:
A kind of preparation method of silicon dioxide thickening agents for toothpaste comprises the steps:
(1) alkalimetal silicate, souring agent are diluted to the dilute solution of 3%-10% and 10%-30%, alkali metal silicate solutions and souring agent solution after the dilution are heated to 60-100 ℃;
(2) sodium monoflurophosphate with alkalimetal silicate dilute solution and mol ratio 1%-10% joins in the reactor, reaches 7-9 until the pH value;
(3) also stream adds souring agent dilute solution and alkalimetal silicate dilute solution, keeping temperature of reaction is 60-100 ℃, control the speed of the adding of souring agent dilute solution and alkalimetal silicate dilute solution respectively, make the interior pH value of still keep 7-9 all the time, after the alkalimetal silicate dilute solution adds, ageing 5-10mins is 3-6 by pH in the souring agent dilute solution adjusting still then, continues ageing 20-40mins;
(4) above-mentioned product is filtered, washs by liquid-solid separation equipment, filter cake carries out fluidisation by colloidal mill, and above-mentioned product is carried out drying by spray-drier, obtains the silicon dioxide thickening agents product.
The preferred water glass of described alkalimetal silicate, silicon is than being 2.5-3.3.Silicon is the mol ratio that contains silicon-dioxide and sodium oxide in the water glass than promptly.
Described souring agent can be sulfuric acid, nitric acid, hydrochloric acid, phosphoric acid, preferably sulfuric acid.
Described sodium monoflurophosphate meets toothpaste sodium monoflurophosphate industry standard.
The beneficial effect that the present invention had:
Technological process of the present invention is easy to control and industrializing implementation, cuts down the consumption of energy and product cost, and the product index of acquisition is reliable and stable.
Embodiment
The present invention is further illustrated below in conjunction with specific embodiment:
Embodiment 1
Water glass, diluting concentrated sulfuric acid become 5% and 14% dilute solution, sodium silicate solution and dilution heat of sulfuric acid after the dilution are heated to 65 ℃, the sodium silicate solution after the adding preheating and the sodium monoflurophosphate of mol ratio 3% are in reactor, keeping temperature of reaction is 65 ℃, when the pH value is 8 in the still, beginning and stream add dilute sulphuric acid and rare sodium silicate solution, control the speed of the adding of dilute sulphuric acid and water glass respectively, make the interior pH value of still keep 8 all the time.After water glass added, ageing 5mins was 4 by pH in the dilute sulphuric acid adjusting still then, continues ageing 30mins, filters, washs by whizzer.Filter cake carries out fluidisation by colloidal mill, and above-mentioned product is carried out drying by spray-drier, obtains the silicon dioxide thickening agents product, product median particle diameter 12 μ m, DOP (dioctyl phthalate (DOP)) oil-absorption(number) 230ml/100g.
Embodiment 2
Water glass, diluting concentrated sulfuric acid become 6% and 15% dilute solution, sodium silicate solution and dilution heat of sulfuric acid after the dilution are heated to 70 ℃, the sodium silicate solution after the adding preheating and the sodium monoflurophosphate of mol ratio 4% are in reactor, keeping temperature of reaction is 70 ℃, when the pH value is 7.7 in the still, beginning and stream add dilute sulphuric acid and rare sodium silicate solution, control the speed of the adding of dilute sulphuric acid and water glass respectively, make the interior pH value of still keep 7.7 all the time.After water glass added, ageing 5mins was 3.8 by pH in the dilute sulphuric acid adjusting still then, continues ageing 30mins, filters, washs by whizzer.Filter cake carries out fluidisation by colloidal mill, and above-mentioned product is carried out drying by spray-drier, obtains the silicon dioxide thickening agents product, product median particle diameter 13 μ m, DOP oil-absorption(number) 235ml/100g.
Embodiment 3
Water glass, diluting concentrated sulfuric acid become 5% and 16% dilute solution, sodium silicate solution and dilution heat of sulfuric acid after the dilution are heated to 85 ℃, the sodium silicate solution after the adding preheating and the sodium monoflurophosphate of mol ratio 3% are in reactor, keeping temperature of reaction is 85 ℃, when the pH value is 8.7 in the still, beginning and stream add dilute sulphuric acid and rare sodium silicate solution, control the speed of the adding of dilute sulphuric acid and water glass respectively, make the interior pH value of still keep 8.7 all the time.After water glass added, ageing 5mins was 4.5 by pH in the dilute sulphuric acid adjusting still then, continues ageing 30mins, filters, washs by whizzer.Filter cake carries out fluidisation by colloidal mill, and above-mentioned product is carried out drying by spray-drier, obtains the silicon dioxide thickening agents product, product median particle diameter 14 μ m, DOP oil-absorption(number) 228ml/100g.
Claims (3)
1. the preparation method of a silicon dioxide thickening agents for toothpaste is characterized in that: comprise the steps:
(1) alkalimetal silicate, souring agent are diluted to the dilute solution of 3%-10% and 10%-30%, alkali metal silicate solutions and souring agent solution after the dilution are heated to 60-100 ℃;
(2) sodium monoflurophosphate with alkalimetal silicate dilute solution and mol ratio 1%-10% joins in the reactor, reaches 7-9 until the pH value;
(3) also stream adds souring agent dilute solution and alkalimetal silicate dilute solution, keeping temperature of reaction is 60-100 ℃, control the speed of the adding of souring agent dilute solution and alkalimetal silicate dilute solution respectively, make the interior pH value of still keep 7-9 all the time, after the alkalimetal silicate dilute solution adds, ageing 5-10mins is 3-6 by pH in the souring agent dilute solution adjusting still then, continues ageing 20-40mins;
(4) above-mentioned product is filtered, washs by liquid-solid separation equipment, filter cake carries out fluidisation by colloidal mill, carries out drying by spray-drier at last, obtains the silicon dioxide thickening agents product.
2. the preparation method of silicon dioxide thickening agents for toothpaste according to claim 1 is characterized in that: the preferred water glass of described alkalimetal silicate, and silicon is than being 2.5-3.3, described souring agent is sulfuric acid, nitric acid, hydrochloric acid, phosphoric acid.
3. the preparation method of silicon dioxide thickening agents for toothpaste according to claim 1 is characterized in that: the preferred water glass of described alkalimetal silicate, silicon is than being 2.5-3.3, described souring agent preferably sulfuric acid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101538213A CN101417808B (en) | 2008-12-08 | 2008-12-08 | Method for preparing silicon dioxide thickening agents for toothpaste |
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| CN2008101538213A CN101417808B (en) | 2008-12-08 | 2008-12-08 | Method for preparing silicon dioxide thickening agents for toothpaste |
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| CN101417808A CN101417808A (en) | 2009-04-29 |
| CN101417808B true CN101417808B (en) | 2011-09-07 |
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| CN2008101538213A Active CN101417808B (en) | 2008-12-08 | 2008-12-08 | Method for preparing silicon dioxide thickening agents for toothpaste |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104418330B (en) * | 2013-08-23 | 2016-11-09 | 确成硅化学股份有限公司 | A kind of silica slurry and preparation method thereof |
| CN103690382A (en) * | 2013-12-26 | 2014-04-02 | 福建龙岩精博化工科技有限公司 | Preparation technology of environment-friendly toothpaste abrasive |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1633968A (en) * | 2004-11-15 | 2005-07-06 | 杨毅男 | Common and functional form solid toothpaste |
| CN1902131A (en) * | 2003-12-19 | 2007-01-24 | 罗狄亚化学公司 | Highly-structured silica having a low water uptake, preparation method thereof and uses of same |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1902131A (en) * | 2003-12-19 | 2007-01-24 | 罗狄亚化学公司 | Highly-structured silica having a low water uptake, preparation method thereof and uses of same |
| CN1633968A (en) * | 2004-11-15 | 2005-07-06 | 杨毅男 | Common and functional form solid toothpaste |
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Owner name: TIANJIN CHANGLU HUAXIN CHEMICAL INDUSTRY CO., LTD. Free format text: FORMER OWNER: RESEARCH INSTITUTE OF PHYSICAL AND CHEMICAL ENGINEERING OF NUCLEAR INDUSTRY HUAH Effective date: 20150522 |
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Effective date of registration: 20150522 Address after: Office building D comprehensive service district Nangang Industrial Development Zone, Tianjin Binhai New Area 300280 article (two) layer (216) site Patentee after: Huahe New-Technology Development Company, Research Institute of Physical and Chemical Engineering of Nuclear Industry Address before: The 300384 Tianjin City Huayuan Industrial Zone Development Road six No. 6 Haitai green industry base building J room 104 Patentee before: Huahe New Technology Development Company, Research Institute of Physical and Chemical Engineering of Nuclear Industry |
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Effective date of registration: 20211108 Address after: 300180, No. 168 Jintang Road, Hedong District, Tianjin Patentee after: RESEARCH INSTITUTE OF PHYSICAL AND CHEMICAL ENGINEERING OF NUCLEAR INDUSTRY Address before: 300280 site [216], floor [2], building D, comprehensive service area, Nangang Industrial Zone, Binhai New Area Development Zone, Tianjin Patentee before: TIANJIN CHANGLU HUAXIN CHEMICAL CO.,LTD. |