CN106590065A - Preparation method for composite titanium dioxide powder - Google Patents
Preparation method for composite titanium dioxide powder Download PDFInfo
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- CN106590065A CN106590065A CN201710029967.6A CN201710029967A CN106590065A CN 106590065 A CN106590065 A CN 106590065A CN 201710029967 A CN201710029967 A CN 201710029967A CN 106590065 A CN106590065 A CN 106590065A
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- titanium dioxide
- powder
- composite titanium
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/36—Compounds of titanium
- C09C1/3607—Titanium dioxide
- C09C1/3653—Treatment with inorganic compounds
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention discloses a preparation method for composite titanium dioxide powder. The method comprises the steps of (1) mixing dihydrate gypsum powder with a sulfuric acid solution, heating a mixture, keeping the temperature for half an hour, and performing filtering and drying; (2) heating an obtained filtrate in a drying oven to remove crystal water to obtain hemihydrate gypsum; (3) grinding the hemihydrate gypsum, uniformly mixing the ground hemihydrate gypsum with titanium dioxide according to a ratio of 4 : 1, mixing obtained powder with water according to a ratio of 1 : 0.5, performing standing for 10 minutes, and keeping the temperature by using the drying oven; and (4) grinding the powder to obtain the composite titanium dioxide powder. The method has the advantages that the composite titanium dioxide powder can effectively replace the titanium dioxide powder and has relatively high whiteness; special anhydrite is prepared into the hemihydrate gypsum; the hemihydrate gypsum is crystallized on the surface of superfine titanium dioxide powder as crystallization nucleuses of the hemihydrate gypsum through utilizing a characteristic that the hemihydrate gypsum is recrystallized when meeting water; and the composite titanium dioxide powder prepared with the method has relatively good weather resistance.
Description
Technical field
The present invention relates to the preparation method of composite titanium dioxide.
Background technology
Titanium dioxide as a kind of Chinese white, due to its superior density, dielectric constant and refractive index so as to possess high screening
Gai Li, high reducing power, best bright finish, high whiteness and strong weatherability, while also having chemical inertness, nontoxic, harmless
Etc. performance, thus become the best Chinese white of performance so far, become Chinese white important in national economy, extensively
It is applied to the multiple fields such as building coating, plastics, papermaking, ink, chemical fibre, electric welding, enamel, daily-use chemical industry.But titanium dioxide
Production cost is high compared with other Chinese whites, and cost differentials amplitude is big.
Composite titanium dioxide is exactly based on using cheap Inorganic nonmetal mineral as kernel, in one layer of its Surface coating
TiO2 particles and be obtained, at present each state is all studying and explore composite titanium dioxide (or claiming substitute of titanium dioxide), with reduce its into
This, the scientific worker of the industrially developed country such as the U.S., Britain, Germany, Japan begins to be engaged in titanium from last century the seventies
The research and exploration work of white powder substitute, and larger economic benefit is achieved, the SiO2 composite titanium dioxide face as made by Japan
Material is mainly used in synthetic fibers product, and the talcum base composite titanium dioxide only part of Britain and France is used for paper industry, and the U.S. is by cloud
Female, kaolin composite titanium dioxide is used for cosmetic industry, country of the Russia coating face that efficiently material and Process research propose
Material manufacturing technology etc., coating is normally only used in China by partial calcination kaolin and titanium dioxide blended product.
At present, the research and development of China's composite titanium dioxide are scarcely out of swaddling-clothes, for the application direction that titanium white product is main
For paint industry and plastic article industry, most of inner nuclear materials are calcium carbonate, konilite or clay class kaolin, whiteness compared with
Low, covering power declines, so the composite titanium dioxide product for preparing still suffers from compared with titanium dioxide larger gap in performance.
The content of the invention
The purpose of the present invention is aiming at the research and development of current China's composite titanium dioxide and is scarcely out of swaddling-clothes, for titanium white
The main application direction of product is paint industry and plastic article industry, most of inner nuclear materials be calcium carbonate, konilite or
Clay class kaolin, whiteness is relatively low, covering power decline, so prepare composite titanium dioxide product in performance compared with titanium dioxide
The deficiency of larger gap is still suffered from, and a kind of preparation method of titanium white composite powder is provided.
The present invention comprises the steps：
（1）Dihydrate gypsum powder and sulfuric acid solution are mixed and heated to into 60 DEG C, filtering drying after insulation half an hour；
（2）By step（1）Middle gained filtrate is placed in baking oven and is heated up to 120 DEG C and sloughs the crystallization water to be changed into semi-hydrated gypsum；
（3）By step（2）Middle gained semi-hydrated gypsum is ground to after 30-40 μm of granularity with titanium dioxide according to 4:1 ratio mixing is equal
It is even to obtain mixed-powder, gained mixed-powder is pressed into 1:0.5 ratio mixes with water makes mixed-powder crystallization and freezing, stands very
Zhong Houyong baking ovens are heated up to 70 DEG C, are incubated 3 hours, obtain block；
（4）By step（3）Middle gained block is ground again, and grind size is 5-10 μm, and gained powder is composite titanium dioxide
Powder.
Preferably, step（1）The dihydrate gypsum powder is that dihydrate gypsum is produced in Jingmen, and its granularity is 30-40 μm.
Preferably, step（1）The sulfuric acid concentration is 56-67%.
Preferably, step（2）The warm-up time is 1 hour.
Preferably, step（3）The Ginding process is that, using ceramic Ball-stirring mill grinding, agitated medium is corundum pearl.
It is an advantage of the invention that：The composite titanium dioxide can effectively substitute titanium dioxide, and with higher whiteness, this method will
Special anhydrous gypsum is prepared into semi-hydrated gypsum, using semi-hydrated gypsum meet water recrystallization characteristic, by the use of superfine titanium white as
The nuclei of crystallization of semi-hydrated gypsum, make semi-hydrated gypsum in its surface crystallization, and composite titanium dioxide prepared by this method possesses stronger resistance to
Hou Xing.
Specific embodiment
The present invention comprises the steps：
（1）Dihydrate gypsum powder and sulfuric acid solution are mixed and heated to into 60 DEG C, filtering drying after insulation half an hour；
（2）By step（1）Middle gained filtrate is placed in baking oven and is heated up to 120 DEG C and sloughs the crystallization water to be changed into semi-hydrated gypsum；
（3）By step（2）Middle gained semi-hydrated gypsum is ground to after 30-40 μm of granularity with titanium dioxide according to 4:1 ratio mixing is equal
It is even to obtain mixed-powder, gained mixed-powder is pressed into 1:0.5 ratio mixes with water makes mixed-powder crystallization and freezing, stands very
Zhong Houyong baking ovens are heated up to 70 DEG C, are incubated 3 hours, obtain block；
（4）By step（3）Middle gained block is ground again, and grind size is 5-10 μm, and gained powder is composite titanium dioxide
Powder.
In the present invention, the milling apparatus are preferably ceramic Ball-stirring mill, and efficiency high consumes energy low, does not produce any impact
The pollutant of composite powder quality.
The specific embodiment of the present invention is further described with reference to embodiment.
Embodiment 1：
Dihydrate gypsum powder and 58% sulfuric acid solution are mixed and heated to into 60 DEG C, filtering drying after insulation half an hour filters gained
Thing is placed in baking oven and is heated up to 120 DEG C and sloughs the crystallization water to be changed into semi-hydrated gypsum, and gained semi-hydrated gypsum is ground to into 30-40 μm of granularity
Afterwards with titanium dioxide according to 4:1 ratio is well mixed, and obtains mixed-powder, and gained mixed-powder is pressed into 1:0.5 ratio and water
Mixing makes mixed-powder crystallization and freezing, and 70 DEG C are heated up to baking oven after standing ten minutes, is incubated 3 hours, by gained block again
Secondary to be ground, grind size is 5-10 μm, and gained powder is composite titanium dioxide.
Embodiment 2：
Dihydrate gypsum powder and 60% sulfuric acid solution are mixed and heated to into 60 DEG C, filtering drying after insulation half an hour filters gained
Thing is placed in baking oven and is heated up to 120 DEG C and sloughs the crystallization water to be changed into semi-hydrated gypsum, and gained semi-hydrated gypsum is ground to into 30-40 μm of granularity
Afterwards with titanium dioxide according to 4:1 ratio is well mixed, and gained mixed-powder presses 1:0.5 ratio mixes with water ties semi-hydrated gypsum
Crystal solidification, 70 DEG C are heated up to after standing ten minutes with baking oven, are incubated 3 hours, gained block are ground again, abrasive grains
Spend for 5-10 μm, gained powder is composite titanium dioxide.
Embodiment 3：
Dihydrate gypsum powder and 63% sulfuric acid solution are mixed and heated to into 60 DEG C, filtering drying after insulation half an hour；Gained is filtered
Thing is placed in baking oven and is heated up to 120 DEG C and sloughs the crystallization water to be changed into semi-hydrated gypsum, and gained semi-hydrated gypsum is ground to into 30-40 μm of granularity
Afterwards with titanium dioxide according to 4:1 ratio is well mixed, and gained powder presses 1:0.5 ratio mixes with water makes semi-hydrated gypsum crystallization solidifying
Gu, 70 DEG C are heated up to baking oven after standing ten minutes, 3 hours are incubated, gained block is ground again, grind size is
5-10 μm, gained powder is composite titanium dioxide.
Embodiment 4：
Dihydrate gypsum powder and 65% sulfuric acid solution are mixed and heated to into 60 DEG C, filtering drying after insulation half an hour filters gained
Thing is placed in baking oven and is heated up to 120 DEG C and sloughs the crystallization water to be changed into semi-hydrated gypsum, and gained semi-hydrated gypsum is ground to into 30-40 μm of granularity
Afterwards with titanium dioxide according to 4:1 ratio is well mixed, and gained powder presses 1:0.5 ratio mixes with water makes semi-hydrated gypsum crystallization solidifying
Gu, 70 DEG C are heated up to baking oven after standing ten minutes, 3 hours are incubated, gained block is ground again, grind size is
5-10 μm, gained powder is composite titanium dioxide.
Composite titanium dioxide product is compared as follows with ordinary titanium powder performance indications in embodiment 1-4：
Claims (5)
1. a kind of preparation method of composite titanium dioxide, it is characterised in that comprise the following steps：
（1）Dihydrate gypsum powder and sulfuric acid solution are mixed and heated to into 60 DEG C, filtering drying after insulation half an hour；
（2）By step（1）Middle gained filtrate is placed in baking oven and is heated up to 120 DEG C and sloughs the crystallization water to be changed into semi-hydrated gypsum；
（3）By step（2）Middle gained semi-hydrated gypsum is ground to after 30-40 μm of granularity with titanium dioxide according to 4:1 ratio mixing is equal
It is even to obtain mixed-powder, gained mixed-powder is pressed into 1:0.5 ratio mixes with water makes mixed-powder crystallization and freezing, stands very
Zhong Houyong baking ovens are heated up to 70 DEG C, are incubated 3 hours, obtain block；
（4）By step（3）Middle gained block is ground again, and grind size is 5-10 μm, and gained powder is composite titanium dioxide
Powder.
2. the preparation method of composite titanium dioxide according to claim 1, it is characterised in that：Step（1）The dihydrate gypsum
Powder is that dihydrate gypsum is produced in Jingmen, and its granularity is 30-40 μm.
3. the preparation method of composite titanium dioxide according to claim 1, it is characterised in that：Step（1）The sulfuric acid concentration
For 56-67%.
4. the preparation method of composite titanium dioxide according to claim 1, it is characterised in that：Step（2）The warm-up time
For 1 hour.
5. the preparation method of composite titanium dioxide according to claim 1, it is characterised in that：Step（3）The Ginding process
It is that, using ceramic Ball-stirring mill grinding, agitated medium is corundum pearl.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710029967.6A CN106590065A (en) | 2017-01-17 | 2017-01-17 | Preparation method for composite titanium dioxide powder |
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| CN201710029967.6A CN106590065A (en) | 2017-01-17 | 2017-01-17 | Preparation method for composite titanium dioxide powder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107974106A (en) * | 2017-11-30 | 2018-05-01 | 广西雅照钛白有限公司 | A kind of titanium white production technique |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107974106A (en) * | 2017-11-30 | 2018-05-01 | 广西雅照钛白有限公司 | A kind of titanium white production technique |
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