CN105502482A - Preparation method of titanium dioxide - Google Patents
Preparation method of titanium dioxide Download PDFInfo
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- CN105502482A CN105502482A CN201410543974.4A CN201410543974A CN105502482A CN 105502482 A CN105502482 A CN 105502482A CN 201410543974 A CN201410543974 A CN 201410543974A CN 105502482 A CN105502482 A CN 105502482A
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Abstract
The invention discloses a preparation method of titanium dioxide. According to the preparation method, the raw material is titanium containing ores, and the raw material is subjected to grinding, burning, acid dissolution, extraction, alkali precipitation, and oxidation so as to prepare titanium dioxide; wherein the burning is carried out in a rotary kiln, the burning temperature is 600 to 900 DEG C; in the acid dissolution step, hydrochloric acid (20-30%) is adopted; in the extraction step, an acidic phosphate-hydrochloric acid extraction system is used, the extraction grade is 20 to 80; and in the alkali precipitation step, sodium carbonate is used to carry out precipitation. The preparation method has the advantages of simple and reasonable design, strong operability, little consumption amount of hydrochloric acid for preparation, low production cost, and high purity of produced titanium dioxide.
Description
Technical field
The present invention relates to a kind of preparation method of Chemicals, be specifically related to a kind of preparation method of titanium dioxide.
Background technology
Titanium dioxide is a kind of white inorganic pigment, has nontoxic, best opacity, best whiteness and luminance brightness, is considered to a kind of white pigment that performance is best in the world at present.The adhesive power of titanium white is strong, and not easily playing chemical transformation, is snow-white forever.Be widely used in the industry such as coating, plastics, papermaking, printing-ink, chemical fibre, rubber, makeup.Its fusing point is very high, is also used to manufacture refractory glass, glaze, enamel, potter's clay, resistant to elevated temperatures experimental ware etc.
Traditional titanium dioxide preparation has vapour phase oxidation process, is namely at high temperature oxidized with titanium tetrachloride and obtains; Another utilizes titanium-containing iron ore stone directly to use sulfuric acid dissolution, under high temperature, high pressure, is then hydrolyzed titanium sulfate and obtains a water titanium dioxide.A kind of front method is not suitable for suitability for industrialized production, and a kind of rear method needs to consume a large amount of sulfuric acid, and easily to environment, meanwhile, high temperature, highly pressured hydrolysis cost compare are high.
Summary of the invention
Technical problem to be solved by this invention is for the deficiencies in the prior art, provide a kind of newly, the easy rational titanium dioxide process of method.
Technical problem to be solved by this invention is realized by following technical scheme.The present invention is a kind of preparation method of titanium dioxide: raw materials used for titaniferous ore, heavy through pulverizings, calcination, acid-soluble, extraction, alkali, be oxidized and form; Described calcination is carrying out calcination with rotary kiln, and calcination temperature is 600-900 DEG C; Described acid-soluble be dissolve with the hydrochloric acid of 20-30%; Described extraction extracts by acid phosphoric acid ester-hcl as extraction agent system, and extraction progression is 20-80 level; Described alkali is heavy is precipitate with sodium carbonate.
The preparation method of titanium dioxide of the present invention, further: described calcination is carrying out calcination with rotary kiln, and calcination temperature is 750 DEG C.
The preparation method of titanium dioxide of the present invention, further: described acid-soluble be with 25% hydrochloric acid dissolve.
The preparation method of titanium dioxide of the present invention, further: described extraction extracts by acid phosphoric acid ester-hcl as extraction agent system, extraction progression is 50 grades.
The preparation method of titanium dioxide of the present invention, further: its concrete steps are: impurity is removed in titaniferous ore sorting, pulverizes, send into rotary kiln and carry out calcination, and send constantly into air, calcination temperature is 800 DEG C, and calcination amount per hour is 500 kilograms; By through calcination ore with 26% hydrochloric acid dissolve at 60 DEG C, then filter, remove filter residue; Filtrate is pumped into acid phosphoric acid ester-hcl as extraction agent system to extract, extraction progression is 60 grades, by adjustment concentration of hydrochloric acid, makes titanium enter aqueous phase; Add sodium carbonate in aqueous phase to precipitate, gained throw out is titanium carbonate, filters; Titanium carbonate is sent into and carries out being oxidized at 700 DEG C of temperature in oxidation kiln and obtain titanium dioxide.
Compared with prior art, the inventive method simplicity of design is reasonable, and workable, during preparation, salt acid consumption is fewer, and production cost is lower, to produce titanium dioxide purity also higher.
Embodiment
Below further describe concrete technical scheme of the present invention, so that those skilled in the art understands the present invention further, and do not form the restriction to its right.
Embodiment 1, a kind of preparation method of titanium dioxide: raw materials used is titaniferous ore, oxidation heavy through pulverizing, calcination, acid-soluble, extraction, alkali forms; Described calcination is carrying out calcination with rotary kiln, and calcination temperature is 600-900 DEG C; Described acid-soluble be dissolve with the hydrochloric acid of 20-30%; Described extraction extracts by acid phosphoric acid ester-hcl as extraction agent system, and extraction progression is 20-80 level; Described alkali is heavy is precipitate with sodium carbonate.
Embodiment 2, in the preparation method of the titanium dioxide described in embodiment 1: described calcination is carrying out calcination with rotary kiln, and calcination temperature is 750 DEG C.
Embodiment 3, in the preparation method of the titanium dioxide described in embodiment 1: described acid-soluble be with 25% hydrochloric acid dissolve.
Embodiment 4, in the preparation method of the titanium dioxide described in embodiment 1: described extraction extracts by acid phosphoric acid ester-hcl as extraction agent system, extraction progression is 50 grades.
Embodiment 5, in the preparation method of the titanium dioxide described in embodiment 1: its concrete steps are: impurity is removed in titaniferous ore sorting, pulverizes, send into rotary kiln and carry out calcination, and send constantly into air, calcination temperature is 800 DEG C, and calcination amount per hour is 500 kilograms; By through calcination ore with 26% hydrochloric acid dissolve at 60 DEG C, then filter, remove filter residue; Filtrate is pumped into acid phosphoric acid ester-hcl as extraction agent system to extract, extraction progression is 60 grades, by adjustment concentration of hydrochloric acid, makes titanium enter aqueous phase; Add sodium carbonate in aqueous phase to precipitate, gained throw out is titanium carbonate, filters; Titanium carbonate is sent into and carries out being oxidized at 700 DEG C of temperature in oxidation kiln and obtain titanium dioxide.
Claims (5)
1. a preparation method for titanium dioxide, is characterized in that: raw materials used for titaniferous ore, heavy through pulverizings, calcination, acid-soluble, extraction, alkali, be oxidized and form; Described calcination is carrying out calcination with rotary kiln, and calcination temperature is 600-900 DEG C; Described acid-soluble be dissolve with the hydrochloric acid of 20-30%; Described extraction extracts by acid phosphoric acid ester-hcl as extraction agent system, and extraction progression is 20-80 level; Described alkali is heavy is precipitate with sodium carbonate.
2. the preparation method of titanium dioxide according to claim 1, is characterized in that: described calcination is carrying out calcination with rotary kiln, and calcination temperature is 750 DEG C.
3. the preparation method of titanium dioxide according to claim 1, is characterized in that: described acid-soluble be with 25% hydrochloric acid dissolve.
4. the preparation method of titanium dioxide according to claim 1, is characterized in that: described extraction extracts by acid phosphoric acid ester-hcl as extraction agent system, and extraction progression is 50 grades.
5. the preparation method of titanium dioxide according to claim 1, is characterized in that: its concrete steps are: impurity is removed in titaniferous ore sorting, pulverizes, send into rotary kiln and carry out calcination, and send constantly into air, calcination temperature is 800 DEG C, and calcination amount per hour is 500 kilograms; By through calcination ore with 26% hydrochloric acid dissolve at 60 DEG C, then filter, remove filter residue; Filtrate is pumped into acid phosphoric acid ester-hcl as extraction agent system to extract, extraction progression is 60 grades, by adjustment concentration of hydrochloric acid, makes titanium enter aqueous phase; Add sodium carbonate in aqueous phase to precipitate, gained throw out is titanium carbonate, filters; Titanium carbonate is sent into and carries out being oxidized at 700 DEG C of temperature in oxidation kiln and obtain titanium dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410543974.4A CN105502482A (en) | 2014-10-15 | 2014-10-15 | Preparation method of titanium dioxide |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410543974.4A CN105502482A (en) | 2014-10-15 | 2014-10-15 | Preparation method of titanium dioxide |
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| CN105502482A true CN105502482A (en) | 2016-04-20 |
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| CN201410543974.4A Pending CN105502482A (en) | 2014-10-15 | 2014-10-15 | Preparation method of titanium dioxide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107572584A (en) * | 2017-09-29 | 2018-01-12 | 福州琪宁精细化工有限公司 | A kind of preparation method of titanium dioxide |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3929962A (en) * | 1972-08-29 | 1975-12-30 | Chyn Duog Shiah | Titanium purification process |
| CN1689975A (en) * | 2004-04-27 | 2005-11-02 | 天津科技大学 | Technique for producing high purity nanometer titanium dioxide |
| CN101531397A (en) * | 2008-03-14 | 2009-09-16 | 中国科学院过程工程研究所 | Clean production method for preparing rutile titanium dioxide from ilmenite |
| CN102765750A (en) * | 2012-05-19 | 2012-11-07 | 河南佰利联化学股份有限公司 | Preparation method of titanium-rich material |
-
2014
- 2014-10-15 CN CN201410543974.4A patent/CN105502482A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3929962A (en) * | 1972-08-29 | 1975-12-30 | Chyn Duog Shiah | Titanium purification process |
| CN1689975A (en) * | 2004-04-27 | 2005-11-02 | 天津科技大学 | Technique for producing high purity nanometer titanium dioxide |
| CN101531397A (en) * | 2008-03-14 | 2009-09-16 | 中国科学院过程工程研究所 | Clean production method for preparing rutile titanium dioxide from ilmenite |
| CN102765750A (en) * | 2012-05-19 | 2012-11-07 | 河南佰利联化学股份有限公司 | Preparation method of titanium-rich material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107572584A (en) * | 2017-09-29 | 2018-01-12 | 福州琪宁精细化工有限公司 | A kind of preparation method of titanium dioxide |
| CN107572584B (en) * | 2017-09-29 | 2019-05-10 | 福州琪宁精细化工有限公司 | A kind of preparation method of titanium dioxide |
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