Method for producing titanium dioxide pigment
Abstract
Abstract THE PRESENT APPLICATION IS A DIVISION OF APPLICATION SER. NO. 723,70, FILED APR. 24, 1968, AND RELATES TO A NOVEL METHOD FOR PRODUCING A RUTILE TIO2 PIGMENT BY A VAPOR PHASE PROCESS WHEREIN THE HEAT REQUIRED FOR THE REACTION OF THE GASEOUS TICL4 WITH OXYGEN IS PROVIDED BY A COLUMN OF HOT COMBUSTION GASES WHICH FILLS THE ENTIRE CROSSSECTION OF A PRE-COMBUSTION CHAMBER IMMEDIATELY PRECEDING A FEEDING RING DESIGNED TO INTRODUCE GASEOUS TICL4 INTO THE COLUMN OF HOT GASES FROM A MULTIPLICITY OF RADIAL APERTURES SURROUNDING THE COLUMN OF HOT COMBUSTION GASES AND LYING IN A COMMON PLANE SUBSTANTIALLY AT RIGHT ANGLES TO ITS LONGITUDINAL AXIS, THE REACTION THE TICL4 WITH THE O2 IN SAID HOT GASES TAKING PLACE WITHIN A RELATIVELY SHORT REACTION ZONE IMMEDIATELY SUCCEEDING THE TICL4 FEEDING RING THUS INSURING HIGH REACTION TEMPERATURES, SHORT REACTION TIME, UNIFORM RESIDENCE TIME AND NO REVERSE CURENTS IN THE REACTION ZONE.
Inventors
- 👤 Achim Kulling
- 👤 Hans Steinbach
- 👤 Bergisch Gladbach
- 👤 Hermann Trueb
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |