CN105347701A - Preparing method of nano calcium hydroxide powder - Google Patents
Preparing method of nano calcium hydroxide powder Download PDFInfo
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- CN105347701A CN105347701A CN201510931831.5A CN201510931831A CN105347701A CN 105347701 A CN105347701 A CN 105347701A CN 201510931831 A CN201510931831 A CN 201510931831A CN 105347701 A CN105347701 A CN 105347701A
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- China
- Prior art keywords
- calcium hydroxide
- production technology
- nano calcium
- raw powder
- technology according
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/02—Lime
- C04B2/04—Slaking
- C04B2/06—Slaking with addition of substances, e.g. hydrophobic agents ; Slaking in the presence of other compounds
- C04B2/066—Making use of the hydration reaction, e.g. the reaction heat for dehydrating gypsum; Chemical drying by using unslaked lime
Abstract
The invention discloses a preparing method of nano calcium hydroxide powder. The preparing method comprises following steps: a) proportionally mixing a dispersant and a surfactant in a liquid medium, and forming dissolution liquid: b) reacting the dissolution liquid, high purity calcium oxide and a defoaming agent in a ball mill and forming suspension slurry; c) drying the suspension slurry by a sprayer, and dispersing by ball milling, thus obtaining the nanoscale calcium oxide powder. The prepared nano calcium oxide powder product is high in product yield, stable in quality and narrow in particle size distribution, the reaction conditions are easily controlled and suitability for industrialized production is realized.
Description
Technical field
The present invention relates to a kind of nano calcium hydroxide raw powder's production technology, particularly one utilizes organic coating legal system for nano calcium hydroxide raw powder's production technology.
Background technology
Calcium hydroxide belongs to middle highly basic, is slightly soluble in water, is common industrial chemicals, is mainly divided into chemical reagent-grade, pharmaceutical grade, food grade and technical grade by its purposes, cement, plastics, environmental protection, fire-retardant etc. in be widely used.
Conventional calcium hydroxide preparation method, mainly calcium oxide digestion method.Its method adds in digestion facility by calcium oxide, add the water of 1.3 ~ 2 times, rapid stirring slaking, oxidation calcium generates calcium hydroxide, then removes the ununiformity in digestion by curing equipment and get rid of unnecessary moisture, the calcium hydroxide powder shape that the method obtains is irregular, and particle diameter is larger.Sometimes in order to obtain the nano calcium hydroxide with high-specific surface area, in digestion water, a kind of alcohol or a kind of tensio-active agent is added.But the method unfavorable factor to take necessary security measures.
Other method also has liquid phase method, specifically can be divided into the precipitator method, spray method, microemulsion method, sol-gel method etc.These method reaction conditionss are easy to control, and equipment is simple, and purity is high, is widely used.But in preparation process, from crystal growth to the possibility precipitated, dry, calcining all exists particle aggregation.And the size of coacervate, distributing makes a big impact to powder characteristic, as affected the compactness of ceramic, the homogeneity etc. of microtexture.The subject matter that the prior art preparing nano calcium hydroxide at present exists is the particle diameter ununiformity caused how overcoming unstable and reunion.
Summary of the invention
In order to overcome the deficiency that prior art exists, the invention provides that a kind of process is easy to control, particle diameter meets the requirements and the homogeneous nano calcium hydroxide raw powder's production technology of size.
The object of the invention is to be reached by following measures: a kind of nano calcium hydroxide raw powder's production technology is provided, comprises the following steps: a) dispersion agent and tensio-active agent are mixed in proportion in media as well, form lysate; B) lysate, high-purity calcium oxide and defoamer are reacted in ball mill, form suspension slurry; C) drying is carried out to slurry, break up, obtain nano level calcium hydroxide powder.
One preferred version is: dispersion agent used is the mixture of a kind of or arbitrary combination in polyoxyethylene glycol, polyvinyl butyral acetal or polyoxyethylene; Consumption and high-purity calcium oxide weight ratio are (1 ~ 50): 1000.
One preferred version is: tensio-active agent used is one or both of Sodium dodecylbenzene sulfonate or sodium carboxymethylcellulose pyce; Consumption and calcium oxide weight ratio are (1 ~ 50): 1000.
One preferred version is: defoamer used is one or both of octanol or glycerine; Consumption and calcium oxide weight ratio are (1 ~ 50): 1000.
One preferred version is: balls grinding machine is planetary ball mill, and its rotating speed is between 150 ~ 400r/min, and Ball-milling Time is between 5 ~ 105 minutes, and ratio of grinding media to material is between 1.5 ~ 5.
One preferred version is: when loading calcium oxide in ball grinder, carries out several times; Take water consumption as reference, each addition is 1% ~ 10% quality of the water yield, and filler total amount is no more than 30% quality of water total amount.
One preferred version is: used medium is electronic grade ultrapure water, and temperature is between 50 ~ 70 DEG C.
One preferred version is: the spray-drier of drying used, its inlet temperature between 200 ~ 280 DEG C, air outlet temperature between 95 ~ 115 DEG C, spraying gun rotating speed between 8000 ~ 14000 turns, pressure reduction 0.1 ~ 0.5Mpa in drying tower.
One preferred version is: the used equipment broken up is airflow milling.
Beneficial effect: the product production of nano calcium hydroxide powder prepared by the present invention is high, steady quality, narrow diameter distribution, and easy control of reaction conditions, is applicable to suitability for industrialized production.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
The present invention mainly comprises the following steps: a) be mixed in proportion in media as well by dispersion agent and tensio-active agent, forms lysate; Dispersion agent is the mixture of a kind of or arbitrary combination in polyoxyethylene glycol, polyvinyl butyral acetal or polyoxyethylene; Tensio-active agent is one or both of Sodium dodecylbenzene sulfonate or sodium carboxymethylcellulose pyce, and medium is electronic grade high-purity water; B) by lysate, high-purity calcium oxide and defoamer, in planetary ball mill, carry out hydration reaction, the calcium hydroxide that calcium oxide aquation generates is coated by tensio-active agent rapidly, stops it and aggregates into macrobead, in the liquid phase dispersed through dispersion agent again, form suspended nitride; Defoamer is one or both of octanol or glycerine.In ball grinder, add high-purity calcium oxide carry out several times, each amount of filler is 1% ~ 10% of the water yield, and repeatedly filler total amount is no more than 30% of water total amount.C) suspended nitride is introduced in spray-drier, and carry out drying treatment rapidly, obtaining primary particle size is 0.1 ~ 1 μm, and aggregate particle size is the loose spherical powder of 30 ~ 60 μm; This powder, through 200 ~ 350 DEG C of process, makes the chemical reagent mixed during aquation decompose; Again through airflow milling process, spherical for loose ball grain is broken up, the nano calcium hydroxide disperseed can be obtained.
Embodiment
By 0.8g polyvinyl butyral acetal, 0.6g Sodium dodecylbenzene sulfonate in 500ml pure water, after dissolving, keep temperature to be 65 DEG C, form lysate stand-by.Successively high-purity for 50g calcium oxide, lysate, 2ml glycerine are added ball grinder.Ball radius is 5mm, 200g, and drum's speed of rotation is 350r/min, ball milling 10 minutes; Again in ball grinder, add the high-purity calcium oxide of 50g, continue ball milling 10 minutes, nano calcium hydroxide suspended nitride can be obtained.Spray-drier inlet temperature is 240 DEG C, and air outlet temperature is 110 DEG C, carries out drying to slurry, obtains loose spheroidal particle, and particle diameter is between 30 ~ 60 μm.Finally, loose particle is broken up through airflow milling, nano calcium hydroxide powder.
Above content is the further description done the present invention in conjunction with optimal technical scheme, can not assert that the concrete enforcement of invention is only limitted to these explanations.Concerning general technical staff of the technical field of the invention, under the prerequisite not departing from design of the present invention, simple deduction and replacement can also be made, all should be considered as protection scope of the present invention.
Claims (9)
1. a nano calcium hydroxide raw powder's production technology, is characterized in that, comprises the following steps: a) be mixed in proportion in media as well by dispersion agent and tensio-active agent, forms lysate; B) lysate, high-purity calcium oxide and defoamer are reacted in ball mill, form suspension slurry; C) drying is carried out to slurry, break up, obtain nano level calcium hydroxide powder.
2. nano calcium hydroxide raw powder's production technology according to claim 1, is characterized in that, dispersion agent used is the mixture of a kind of or arbitrary combination in polyoxyethylene glycol, polyvinyl butyral acetal or polyoxyethylene; Consumption and high-purity calcium oxide weight ratio are (1 ~ 50): 1000.
3. nano calcium hydroxide raw powder's production technology according to claim 1, is characterized in that, tensio-active agent used is one or both of Sodium dodecylbenzene sulfonate or sodium carboxymethylcellulose pyce; Consumption and calcium oxide weight ratio are (1 ~ 50): 1000.
4. nano calcium hydroxide raw powder's production technology according to claim 1, is characterized in that, defoamer used is one or both of octanol or glycerine; Consumption and calcium oxide weight ratio are (1 ~ 50): 1000.
5. nano calcium hydroxide raw powder's production technology according to claim 1, is characterized in that, balls grinding machine is planetary ball mill, and its rotating speed is between 150 ~ 400r/min, and Ball-milling Time is between 5 ~ 105 minutes, and ratio of grinding media to material is between 1.5 ~ 5.
6. nano calcium hydroxide raw powder's production technology according to claim 1, is characterized in that, when loading calcium oxide in ball grinder, carries out several times; Take water consumption as reference, each addition is 1% ~ 10% quality of the water yield, and filler total amount is no more than 30% quality of water total amount.
7. nano calcium hydroxide raw powder's production technology according to claim 1, is characterized in that, used medium is electronic grade ultrapure water, and temperature is between 50 ~ 70 DEG C.
8. nano calcium hydroxide raw powder's production technology according to claim 1, it is characterized in that, the spray-drier of drying used, its inlet temperature is between 200 ~ 280 DEG C, air outlet temperature is between 95 ~ 115 DEG C, spraying gun rotating speed between 8000 ~ 14000 turns, pressure reduction 0.1 ~ 0.5Mpa in drying tower.
9. nano calcium hydroxide raw powder's production technology according to claim 1, is characterized in that, the used equipment broken up is airflow milling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510931831.5A CN105347701A (en) | 2015-12-15 | 2015-12-15 | Preparing method of nano calcium hydroxide powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510931831.5A CN105347701A (en) | 2015-12-15 | 2015-12-15 | Preparing method of nano calcium hydroxide powder |
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| Publication Number | Publication Date |
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| CN105347701A true CN105347701A (en) | 2016-02-24 |
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| CN201510931831.5A Pending CN105347701A (en) | 2015-12-15 | 2015-12-15 | Preparing method of nano calcium hydroxide powder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109437272A (en) * | 2018-12-07 | 2019-03-08 | 常熟市宏宇钙化物有限公司 | A kind of production technology of nanoscale calcium hydroxide |
| CN111573704A (en) * | 2020-04-28 | 2020-08-25 | 广西夏阳环保科技有限公司 | Preparation method of high-purity nano calcium hydroxide |
| TWI733839B (en) * | 2016-06-24 | 2021-07-21 | 比利時商耐斯赤理查發展公司 | Process for manufacturing fine highly porous powdery slaked lime composition and product thereby obtained |
| CN116903270A (en) * | 2023-09-06 | 2023-10-20 | 山东万达环保科技有限公司 | Preparation method of calcium hydroxide with high specific surface area |
-
2015
- 2015-12-15 CN CN201510931831.5A patent/CN105347701A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI733839B (en) * | 2016-06-24 | 2021-07-21 | 比利時商耐斯赤理查發展公司 | Process for manufacturing fine highly porous powdery slaked lime composition and product thereby obtained |
| CN109437272A (en) * | 2018-12-07 | 2019-03-08 | 常熟市宏宇钙化物有限公司 | A kind of production technology of nanoscale calcium hydroxide |
| CN111573704A (en) * | 2020-04-28 | 2020-08-25 | 广西夏阳环保科技有限公司 | Preparation method of high-purity nano calcium hydroxide |
| CN111573704B (en) * | 2020-04-28 | 2023-01-06 | 都安春旭新材料科技有限责任公司 | Preparation method of high-purity nano calcium hydroxide |
| CN116903270A (en) * | 2023-09-06 | 2023-10-20 | 山东万达环保科技有限公司 | Preparation method of calcium hydroxide with high specific surface area |
| CN116903270B (en) * | 2023-09-06 | 2023-12-05 | 山东万达环保科技有限公司 | Preparation method of calcium hydroxide with high specific surface area |
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Application publication date: 20160224 |