Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Patent
1992-01-17
1993-09-07
Niebling, John
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
20415751, C01B 1314
Patent
active
052425576
ABSTRACT:
A method for preparing pigmentary titanium dioxide is claimed. An aqueous solution of a titanium halide is mixed with 0.1 to 1.0% by weight titanium dioxide nuclei and the resultant mixture is heated in a sealed vessel to 150.degree. to 300.degree. C. at which temperature it is maintained for at least 15 minutes. The mixture is subjected to ultrasonic vibrations for at least a part of the heating process.
The product of the process is useful as a white pigment without need for further treatment to optimise its particle size.
REFERENCES:
patent: 3329484 (1967-07-01), Long et al.
patent: 3528773 (1970-09-01), Surls et al.
patent: 3635671 (1972-01-01), Iveter et al.
patent: 3923968 (1975-12-01), Basque et al.
patent: 5024827 (1991-06-01), Jones et al.
Jones William J.
Tooze Judith F.
Delacroix-Muirheid C.
Niebling John
Tioxide Group Services Limited
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