Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Patent
1990-10-11
1992-01-21
Lewis, Michael L.
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
423637, 423608, 501136, 106449, C01G 2304, C01F 1102
Patent
active
050826484
ABSTRACT:
A process for the preparation of high purity calcium titanate hydrates, particularly various forms of kassite, is disclosed. Calcium carbonate and titanium tetraisopropoxide are used as starting materials. The process utilizes a hydrothermal reaction step. Hydrates having both hexagonal plate form, wherein the particles have a hexagonally shaped flat plate-like morphology, and lath form, wherein the particles have a rod-like morphology are produceable according to the process. Particle morphology is determined by the choice of process parameters, especially the rate of heating during the hydrothermal reaction step. Kassite particles of the hexagonal plate form, which are useful as a high opacity paper coating pigment, are produced when the rate of heating is less than or equal to 1.5.degree. C./min. Faster rates of heating result in kassite particles of a lath form. These particles are useful as a reinforcing material in polymers and ceramics.
REFERENCES:
Mitsuhashi et al., "Brookite Formation from Precipitates Containing Calcium Ions", Mineralogical Jr., vol. 9, No. 4, 1978, pp. 236-240.
Evans et al., "Kassite from the Diamond Jo Quarry, Magnet Cave, Hot Spring County, Ark.: The Problem of Cafetite and Kassite", American Mineralogist, vol. 71, 1986, pp. 1045-1048.
Rudashevskii et al., "Synthetic Analog and Refinement of the Properties of Kassite and Hydrokassite", Mineral and Geo. Chem., vol. 106, No. 1, pp. 114-20, 1977.
Kisel et al., "Calcium Dititanate", Neorganicheskie Materialy, vol. 8, No. 10, pp. 1782-1785, Oct., 1972.
Damiano John
Griffin Richard C.
Akers Lawrence C.
Bos Steven
Jaeger Howard R.
Lewis Michael L.
Pfizer Inc.
LandOfFree
Process for the preparation of high purity calcium titanate hydr does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the preparation of high purity calcium titanate hydr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of high purity calcium titanate hydr will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-114310