IT1105725B - Titanium di:oxide pigment having colour index about 1500 - prepd. by two=stage hydrolysis of aq. acid soln. - Google Patents
Titanium di:oxide pigment having colour index about 1500 - prepd. by two=stage hydrolysis of aq. acid soln.Info
- Publication number
- IT1105725B IT1105725B IT4981778A IT4981778A IT1105725B IT 1105725 B IT1105725 B IT 1105725B IT 4981778 A IT4981778 A IT 4981778A IT 4981778 A IT4981778 A IT 4981778A IT 1105725 B IT1105725 B IT 1105725B
- Authority
- IT
- Italy
- Prior art keywords
- tio2
- soln
- acid
- colour index
- prepd
- Prior art date
Links
- 239000002253 acid Substances 0.000 title abstract 4
- 230000007062 hydrolysis Effects 0.000 title abstract 3
- 238000006460 hydrolysis reaction Methods 0.000 title abstract 3
- 239000000049 pigment Substances 0.000 title abstract 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title 1
- 229910052719 titanium Inorganic materials 0.000 title 1
- 239000010936 titanium Substances 0.000 title 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract 17
- 239000000706 filtrate Substances 0.000 abstract 3
- 239000002245 particle Substances 0.000 abstract 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 235000011149 sulphuric acid Nutrition 0.000 abstract 2
- 238000001914 filtration Methods 0.000 abstract 1
- 230000003301 hydrolyzing effect Effects 0.000 abstract 1
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 abstract 1
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
Controlled particle size TiO2 is prepd. by (a) heating aq. H2SO4 contg. is not >200 g TiO2/l until the degree of hydrolysis is 10-20% and filterable ppte. particles are formed, (b) filtering to remove TiO2 particles, giving an almost clear filtrate, (c) further hydrolysing the filtrate and adding 6-8 pts.vol. original aq. acid TiO2 soln. per pt. filtrate and (d)recovering hydrolysed ppte. which can be calcined to give TiO2 having a colour index >=1500. Pref. the acid soln. of TiO2 (a) is heated for 1-2 hr. at 90 degrees C-b.pt. and further hydrolysis (c) is by heating at 90 degrees C-b.pt. with aq. acid TiO2 soln. added over 5-8 hrs. The TiO2 is used as a pigment. It colour index of >=1500 is higher than the conventional 1250. The aq. acid-TiO2 soln. is generally obtd. by dissolving e.g. ilmenite ore in H2SO4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT4981778A IT1105725B (en) | 1978-06-12 | 1978-06-12 | Titanium di:oxide pigment having colour index about 1500 - prepd. by two=stage hydrolysis of aq. acid soln. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT4981778A IT1105725B (en) | 1978-06-12 | 1978-06-12 | Titanium di:oxide pigment having colour index about 1500 - prepd. by two=stage hydrolysis of aq. acid soln. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IT7849817A0 IT7849817A0 (en) | 1978-06-12 |
| IT1105725B true IT1105725B (en) | 1985-11-04 |
Family
ID=11271633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT4981778A IT1105725B (en) | 1978-06-12 | 1978-06-12 | Titanium di:oxide pigment having colour index about 1500 - prepd. by two=stage hydrolysis of aq. acid soln. |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | IT1105725B (en) |
-
1978
- 1978-06-12 IT IT4981778A patent/IT1105725B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| IT7849817A0 (en) | 1978-06-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FR2727125B1 (en) | PROCESS FOR TREATING TITANIUM DIOXIDE PIGMENTS, A NEW TITANIUM DIOXIDE PIGMENT AND ITS USE IN PAPER MANUFACTURING | |
| CA2166647A1 (en) | Preparation of anatase titanium dioxide | |
| DE2343344B2 (en) | Process for the extraction of pure titanium dioxide from titanium ores | |
| IT1105725B (en) | Titanium di:oxide pigment having colour index about 1500 - prepd. by two=stage hydrolysis of aq. acid soln. | |
| FR2428004A1 (en) | Titanium di:oxide pigment having colour index about 1500 - prepd. by two=stage hydrolysis of aq. acid soln. | |
| US3501271A (en) | Tio2 precipitation process | |
| EP0341703B1 (en) | Acicular titanium dioxide particles and method of the production thereof | |
| US2327992A (en) | Process for the preparation of compounds of cerium | |
| Yoshio et al. | Process for Preparing Titanium Dioxide | |
| GB1294703A (en) | Process for the removal of dissolved titaniferous solution | |
| US2427165A (en) | Manufacture of rutile | |
| US2389026A (en) | Method of preparing titanium dioxide | |
| GB2291052A (en) | Production of rutile titanium dioxide | |
| US3178264A (en) | Production of tio2 pigments of improved color by sulfate process | |
| US1797760A (en) | Production of titanium compositions | |
| US3119661A (en) | Method for recovery of sio2 and zro2 from zircon | |
| US2290111A (en) | Production of titanium oxide | |
| US1758472A (en) | Production of titanic oxide | |
| US2488755A (en) | Rutile seed manufacture | |
| US3464791A (en) | Process for the production of pigmentary tio2 | |
| US3423178A (en) | Tio2 production by chromium removal from beneficiated titaniferous ore | |
| JPS62252328A (en) | Method for purifying inorganic compound | |
| US2971821A (en) | Seed for production of rutile titanium dioxide pigment and process | |
| US3320025A (en) | Process for the preparation of a titanate containing two alkali metals | |
| DE2314923A1 (en) | METHOD FOR PRODUCING TITANIUM TRAFLUORIDE |