CN107572584B - A kind of preparation method of titanium dioxide - Google Patents
A kind of preparation method of titanium dioxide Download PDFInfo
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- CN107572584B CN107572584B CN201710912423.4A CN201710912423A CN107572584B CN 107572584 B CN107572584 B CN 107572584B CN 201710912423 A CN201710912423 A CN 201710912423A CN 107572584 B CN107572584 B CN 107572584B
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- oxychloride
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 30
- XFVGXQSSXWIWIO-UHFFFAOYSA-N chloro hypochlorite;titanium Chemical compound [Ti].ClOCl XFVGXQSSXWIWIO-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000001816 cooling Methods 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 21
- 239000012141 concentrate Substances 0.000 claims abstract description 20
- 238000001354 calcination Methods 0.000 claims abstract description 18
- 238000005292 vacuum distillation Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 13
- 230000003647 oxidation Effects 0.000 claims abstract description 12
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 12
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 11
- 239000011707 mineral Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000003301 hydrolyzing effect Effects 0.000 claims abstract description 6
- 238000005260 corrosion Methods 0.000 claims abstract description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 16
- 239000010936 titanium Substances 0.000 claims description 16
- 229910052719 titanium Inorganic materials 0.000 claims description 16
- 238000000926 separation method Methods 0.000 claims description 14
- 239000002253 acid Substances 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 8
- 238000004090 dissolution Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical group CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 2
- RCJVRSBWZCNNQT-UHFFFAOYSA-N dichloridooxygen Chemical compound ClOCl RCJVRSBWZCNNQT-UHFFFAOYSA-N 0.000 claims 1
- 238000004821 distillation Methods 0.000 claims 1
- 235000010215 titanium dioxide Nutrition 0.000 description 32
- 235000010755 mineral Nutrition 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910000004 White lead Inorganic materials 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 239000002537 cosmetic Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 210000003298 dental enamel Anatomy 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 241000790917 Dioxys <bee> Species 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000002688 persistence Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid group Chemical group S(O)(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000000516 sunscreening agent Substances 0.000 description 2
- 239000000037 vitreous enamel Substances 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 235000014692 zinc oxide Nutrition 0.000 description 2
- HLLSOEKIMZEGFV-UHFFFAOYSA-N 4-(dibutylsulfamoyl)benzoic acid Chemical compound CCCCN(CCCC)S(=O)(=O)C1=CC=C(C(O)=O)C=C1 HLLSOEKIMZEGFV-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 210000004709 eyebrow Anatomy 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 210000004209 hair Anatomy 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- -1 papermaking Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 230000000475 sunscreen effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- 239000012463 white pigment Substances 0.000 description 1
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention discloses a kind of preparation method of titanium dioxide, a kind of preparation method of titanium dioxide of the invention includes the following steps: that (1) uses titaniferous materials for raw material, crushes, roasting；(2) cooling obtained mineral powder is put into reaction kettle and dilute hydrochloric acid is added, obtain titanium oxychloride solution；(3) titanium oxychloride solution is put into vacuum distillation reaction kettle, vacuum distillation obtains titanium oxychloride concentrate；(4) then the titanium oxychloride concentrate is placed in anti-corrosion extractor and is extracted using extractant, separating-purifying；(5) the titanium oxychloride concentrate is placed in hydrolytic reaction pot and is stirred, while microwave heating concentrate, to which after reaction, mixture is cooled down；(6) enter cyclone separator from the oxidation mixtures that cooling tube comes out, the oxidation mixtures after cyclone separator separates enter back into filter, and calcining grinds and titanium dioxide is made.The purity is high of product of the invention, hardness and impact resistance are good.
Description
Technical field
The present invention relates to chemical technology fields, and in particular to a kind of preparation method of titanium dioxide.
Background technique
Titanium dioxide (chemical formula: TiO2), white solid or powdered amphoteric oxide, molecular weight: 79.83, it is one
Kind white inorganic pigment, has nontoxic, optimal opacity, best whiteness and brightness, it is considered to be current property in the world
A kind of best white pigment of energy.The adhesion strength of titanium white is strong, has been not easy chemical change, is snow-white forever.It is widely used in applying
The industry such as material, plastics, papermaking, printing ink, chemical fibre, rubber, cosmetics.Its fusing point is very high, is also used to manufacture fire resisting glass
Glass, glaze, enamel, clay, experimental ware resistant to high temperature etc..Meanwhile titanium dioxide has preferable ultraviolet light masking action, often makees
It is mixed in textile fabric for sun-screening agent, ultra-fine titania powder is also added into sunscreen cosmetic is made in sun-proof creams.
Titanium dioxide can be decomposed by rutile acid and be extracted, or decompose to obtain by titanium tetrachloride.Titanium dioxide property is stablized,
A large amount of white pigments being used as in paint, it has good covering power similar with white lead, but unlike white lead can blackening；It
The persistence the same with zinc white again.Titanium dioxide also serves as the delustering agent of enamel, can produce a kind of very bright, hard and resistance to
The vitreous enamel cover of acid.
Titanium dioxide is widely used in the related fieldss such as coating, papermaking, plastics, in recent years, with the swift and violent hair of new material
Exhibition, the titanium dioxide application as functional material are more and more wider.High-purity titanium dioxide is the basic former material for preparing other materials
Material, such as using high-purity titanium dioxide as raw material, titanium oxynitrides black pigment is can be obtained in reduction in ammonia, due in production process
Do not bring the impurity being harmful to the human body into, the titanium being prepared using the method is black safe and non-toxic, the black face suitable for cosmetics
Material, such as production eyebrow pencil, mascara.In recent years, the fields such as military project, battery, titanium and cosmetics are to high-purity titanium dioxide
Demand is increasing.
Titanium dioxide property is stablized, and a large amount of white pigments being used as in paint, it has good covering power and white lead
It is similar, but unlike white lead can blackening；The persistence that it has zinc white the same again.Titanium dioxide also serves as the delustering agent of enamel, can
To generate a kind of very bright, hard and acidproof vitreous enamel cover.Titanium dioxide is a kind of important industrial chemicals, traditional oxygen
Change titanium preparation method there are mainly two types of, one is sulfuric acid process to prepare titanium oxide, and this method technique is although fairly simple, but acid consumption compared with
Greatly, not only high production cost, and environmental pollution is serious.
Currently, lacking a kind of preparation method of high titanium dioxide of product purity.
Summary of the invention
The purpose of the present invention is to provide a kind of preparation methods of titanium dioxide that product purity is high.
In order to achieve the above objectives, present invention employs following technical proposals: a kind of preparation side of titanium dioxide of the invention
Method includes the following steps:
(1) it uses the titaniferous materials containing 90% or more titanium dioxide to be crushed for raw material, is sent into rotary calcination kiln
It is roasted, maturing temperature is 700-900 DEG C, and calcining time is 20-50 minutes, then carries out cooling obtained mineral powder；
(2) cooling obtained mineral powder is put into reaction kettle and dilute hydrochloric acid is added, acidolysis temperature is 80-90 DEG C, when acid is molten
Between be 100-150 minutes, obtain titanium oxychloride solution；
(3) titanium oxychloride solution is put into vacuum distillation reaction kettle, vacuum distillation obtains titanium oxychloride concentrate, described
The pressure inside the tank that reaction kettle is evaporated in vacuo is 0.1-0.2MPa, and vacuum degree 60-70MPa, temperature is 70-75 DEG C, extracts fluid
Flow is 800-900L/h, extraction time 60-120min；
(4) then the titanium oxychloride concentrate is placed in anti-corrosion extractor and is extracted using extractant, extractant is
Tributyl phosphate, separating-purifying obtain pure titanium oxychloride concentrate；
(5) the titanium oxychloride concentrate is placed in hydrolytic reaction pot and is stirred, while microwave heating concentrate, heating temperature
It is 70-72 DEG C, to which after reaction, obtained mixture is cooled down using cooling tube；
(6) enter from the oxidation mixtures that cooling tube comes out and carry out gas solid separation in cyclone separator, through whirlwind point
Filter is entered back into from the oxidation mixtures after device separation and carries out secondary separation, in 500-800 DEG C of calcining 2-5h, grinding system
Obtain titanium dioxide.
Further, in step (1), the titaniferous ore is high titanium slag or rutile titanium ore, and the calcining time is
40 minutes.
Further, the acidolysis temperature is 84 DEG C, and the acid dissolution time is 120 minutes.
Further, the vacuum degree in the vacuum distillation reaction kettle is 0.12Mpa, temperature is 72 DEG C.
Further, in step (5), the heating temperature is 71 DEG C.
The utility model has the advantages that the purity is high of product of the invention, weatherability and impact resistance are good, there is strong covering power, it is excellent
Processing performance.The entire technics comparing of the present invention is simple, pollutes small in production process, and production cost is low, and favorable reproducibility was reacted
Journey is reliable.
Compared with prior art, the present invention has the advantage that during (1) present invention separates mixture,
Mixture high-speed motion, so that mixture temperature is lower.
(2) titanium dioxide granule good dispersion of the present invention by rapid cooling, particle are uniform.
(3) extractant of the present invention is tributyl phosphate, extraction titanium dioxide product purity is high, titanium oxychloride concentrate purity
The quality of height, obtained titanium dioxide is stablized.
Specific embodiment
By following embodiment, present invention be described in more detail, but should be noted that the scope of the present invention is not implemented by these
Any restrictions of example.
Embodiment 1
A kind of preparation method of titanium dioxide of the invention, includes the following steps:
(1) it uses the titaniferous materials containing 90% or more titanium dioxide to be crushed for raw material, is sent into rotary calcination kiln
It is roasted, maturing temperature is 700 DEG C, and calcining time is 40 minutes, then carries out cooling obtained mineral powder；It is described to contain titanium ore
Stone is high titanium slag；
(2) cooling obtained mineral powder is put into reaction kettle and dilute hydrochloric acid is added, acidolysis temperature is 90 DEG C, and acid dissolution time is
120 minutes, obtain titanium oxychloride solution；
(3) titanium oxychloride solution is put into vacuum distillation reaction kettle, vacuum distillation obtains titanium oxychloride concentrate, described
The pressure inside the tank that reaction kettle is evaporated in vacuo is 0.1MPa, and vacuum degree 65MPa, temperature is 75 DEG C, and extraction fluid flow is 850L/
H, extraction time 90min；
(4) then the titanium oxychloride concentrate is placed in anti-corrosion extractor and is extracted using extractant, extractant is
Tributyl phosphate, separating-purifying obtain pure titanium oxychloride concentrate；
(5) the titanium oxychloride concentrate is placed in hydrolytic reaction pot and is stirred, while microwave heating concentrate, heating temperature
It is 70 DEG C, to which after reaction, obtained mixture is cooled down using cooling tube；
(6) enter from the oxidation mixtures that cooling tube comes out and carry out gas solid separation in cyclone separator, through whirlwind point
Filter is entered back into from the oxidation mixtures after device separation and carries out secondary separation, in 800 DEG C of calcining 2h, grinds and dioxy is made
Change titanium.
Embodiment 2
Embodiment 2 the difference from embodiment 1 is that: the preparation method of a kind of titanium dioxide of the invention, including walk as follows
It is rapid:
In step (1), the titaniferous materials containing 90% or more titanium dioxide is used to be crushed for raw material, is sent into
Rotary calcination kiln is roasted, and maturing temperature is 800 DEG C, and calcining time is 50 minutes, then carries out cooling obtained mineral powder；Institute
Stating titaniferous ore is rutile titanium ore；
In step (2), cooling obtained mineral powder being put into reaction kettle, dilute hydrochloric acid is added, acidolysis temperature is 80 DEG C,
Acid dissolution time is 100 minutes, obtains titanium oxychloride solution；
In step (3), titanium oxychloride solution is put into vacuum distillation reaction kettle, it is dense that vacuum distillation obtains titanium oxychloride
Contracting liquid, the pressure inside the tank of the vacuum distillation reaction kettle are 0.2MPa, and vacuum degree 70MPa, temperature is 72 DEG C, extracts fluid
Flow is 800L/h, extraction time 60min；
In step (5), which is placed in hydrolytic reaction pot and is stirred, while microwave heating is concentrated
Liquid, heating temperature is 72 DEG C, to which after reaction, obtained mixture is cooled down using cooling tube.
(6) enter from the oxidation mixtures that cooling tube comes out and carry out gas solid separation in cyclone separator, through whirlwind point
Filter is entered back into from the oxidation mixtures after device separation and carries out secondary separation, in 700 DEG C of calcining 3h, grinds and dioxy is made
Change titanium.
Embodiment 3
Embodiment 3 the difference from embodiment 1 is that: the preparation method of a kind of titanium dioxide of the invention, including walk as follows
It is rapid:
In step (1), the titaniferous materials containing 90% or more titanium dioxide is used to be crushed for raw material, is sent into
Rotary calcination kiln is roasted, and maturing temperature is 900 DEG C, and calcining time is 20 minutes, then carries out cooling obtained mineral powder；Institute
Stating titaniferous ore is rutile titanium ore；
In step (2), cooling obtained mineral powder being put into reaction kettle, dilute hydrochloric acid is added, acidolysis temperature is 84 DEG C,
Acid dissolution time is 150 minutes, obtains titanium oxychloride solution；
In step (3), titanium oxychloride solution is put into vacuum distillation reaction kettle, it is dense that vacuum distillation obtains titanium oxychloride
Contracting liquid, the pressure inside the tank of the vacuum distillation reaction kettle are 0.12MPa, and vacuum degree 60MPa, temperature is 70 DEG C, extracts fluid
Flow is 900L/h, extraction time 120min；
In step (5), which is placed in hydrolytic reaction pot and is stirred, while microwave heating is concentrated
Liquid, heating temperature is 71 DEG C, to which after reaction, obtained mixture is cooled down using cooling tube.
In step (6), the oxidation mixtures come out from cooling tube, which enter, carries out gas solid separation in cyclone separator,
Oxidation mixtures after cyclone separator separates enter back into filter and carry out secondary separation, in 500 DEG C of calcining 5h, grinding
Titanium dioxide is made.
Test 1
Embodiment 1 to 3 resulting product of embodiment is subjected to quality analysis, obtains that the results are shown in Table 1:
Table 1
| Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| TiO2/ % | 99.1 | 99.4 | 99.5 |
| Hardness | H | H | H |
| Appearance | Normally | Normally | Normally |
| Impact resistance test | Preferably | Preferably | Preferably |
As shown in table 1, the purity is high of product of the invention, hardness and impact resistance are good.This has been shown and described above
The basic principles and main features and advantages of the present invention of invention.It should be understood by those skilled in the art that the present invention is not by above-mentioned
The limitation of embodiment, the above embodiments and description only illustrate the principle of the present invention, is not departing from essence of the invention
Under the premise of mind and range, various changes and improvements may be made to the invention, and the claimed scope of the invention is wanted by appended right
Ask book, specification and its equivalent thereof.
Claims (6)
1. a kind of preparation method of titanium dioxide, it is characterised in that include the following steps:
(1) it uses the titaniferous materials containing 90% or more titanium dioxide to be crushed for raw material, is sent into rotary calcination kiln and carries out
Roasting, maturing temperature are 700-900 DEG C, and calcining time is 20-50 minutes, then carry out cooling obtained mineral powder；
(2) cooling obtained mineral powder is put into reaction kettle and dilute hydrochloric acid is added, acidolysis temperature is 80-90 DEG C, and acid dissolution time is
100-150 minutes, obtain titanium oxychloride solution；
(3) titanium oxychloride solution is put into vacuum distillation reaction kettle, vacuum distillation obtains titanium oxychloride concentrate, the vacuum
The pressure inside the tank of distillation reactor is 0.1-0.2MPa, and vacuum degree 60-70MPa, temperature is 70-75 DEG C；
(4) then the titanium oxychloride concentrate is placed in anti-corrosion extractor and is extracted using extractant, extractant is phosphoric acid
Tributyl, extraction fluid flow are 800-900L/h, extraction time 60-120min, and separating-purifying obtains pure oxychloride
Titanium concentrate；
(5) the titanium oxychloride concentrate is placed in hydrolytic reaction pot and is stirred, while microwave heating concentrate, heating temperature are
70-72 DEG C, to which after reaction, obtained mixture is cooled down using cooling tube；
(6) enter from the oxidation mixtures that cooling tube comes out and carry out gas solid separation in cyclone separator, through cyclone separator
Oxidation mixtures after separation enter back into filter and carry out secondary separation, and in 500-800 DEG C of calcining 2-5h, grinding is made two
Titanium oxide.
2. the preparation method of titanium dioxide according to claim 1, it is characterised in that: described to contain titanium ore in step (1)
Stone is high titanium slag or rutile titanium ore, and the calcining time is 40 minutes.
3. the preparation method of titanium dioxide according to claim 1, it is characterised in that: in step (2), the acidolysis temperature
Degree is 84 DEG C, and the acid dissolution time is 120 minutes.
4. the preparation method of titanium dioxide according to claim 1, it is characterised in that: in step (3), the vacuum is steamed
Evaporate that the vacuum degree in reaction kettle is 0.12Mpa, temperature is 72 DEG C.
5. the preparation method of titanium dioxide according to any one of claims 1 to 4, it is characterised in that: in step (5),
The heating temperature is 71 DEG C.
6. the preparation method of titanium dioxide according to claim 5, it is characterised in that: in step (6), the filter
For bag filter.
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| CN109019680A (en) * | 2018-10-23 | 2018-12-18 | 宜宾学院 | A kind of Titanium Dioxide Produced by Chloride Procedure by-product hydrochloric acid production titanium dioxide method |
| CN115057470B (en) * | 2022-08-12 | 2022-11-01 | 山西三尽材料科技有限公司 | Process for preparing metatitanic acid by using alumina red mud |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1511788A (en) * | 2002-12-30 | 2004-07-14 | 田福祯 | Process for preparing nano titanium dioxide |
| 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 |
| CN104828864A (en) * | 2015-05-26 | 2015-08-12 | 昆明冶金研究院 | Process for making artificial rutile by leaching of mohsite hydrochloric acid |
| CN105502482A (en) * | 2014-10-15 | 2016-04-20 | 刘浩 | Preparation method of titanium dioxide |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1511788A (en) * | 2002-12-30 | 2004-07-14 | 田福祯 | Process for preparing nano titanium dioxide |
| 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 |
| CN105502482A (en) * | 2014-10-15 | 2016-04-20 | 刘浩 | Preparation method of titanium dioxide |
| CN104828864A (en) * | 2015-05-26 | 2015-08-12 | 昆明冶金研究院 | Process for making artificial rutile by leaching of mohsite hydrochloric acid |
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Effective date of registration: 20240409 Address after: No. 591, Nancao Village, Jiangyin Town, Fuqing City, Fuzhou City, Fujian Province, 350309 Patentee after: Fuzhou Jiuyang Chemical Co.,Ltd. Country or region after: China Address before: 350018 Chengmen Town Chengmen Village Chengmen Mountain, Cangshan City, Fuzhou City, Fujian Province Patentee before: FUZHOU QINING FINE CHEMICAL Co.,Ltd. Country or region before: China |
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