Chemistry of inorganic compounds – Rare earth compound
Patent
1994-03-07
1996-03-05
Bos, Steven
Chemistry of inorganic compounds
Rare earth compound
502302, 502303, C01F 1700, B01J 2300
Patent
active
054965284
ABSTRACT:
Novel rare earth oxides having a large specific surface of at least 40 m.sup.2 /g, well adapted for catalysis, are prepared (i) by reacting at least one rare earth salt with a strong base in the presence of carboxylate ions, or by reacting at least one rare earth carboxylate with a strong base, to produce a true rare earth hydroxide, (ii) separating the precipitate thus produced, and then (iii) washing and (iv) calcining such precipitate.
REFERENCES:
patent: 3914389 (1975-10-01), Haadce
patent: 3950478 (1976-04-01), Kenworthy et al.
patent: 4605631 (1986-08-01), Rossi
patent: 4661330 (1987-04-01), Chane-Ching et al.
patent: 4663137 (1987-05-01), Chane-Ching et al.
patent: 4714694 (1987-12-01), Wan et al.
patent: 4738946 (1988-04-01), Yamashita et al.
patent: 4752459 (1988-06-01), Pepper
patent: 4755492 (1988-07-01), Greskovich et al.
patent: 4761390 (1988-08-01), Hartnett et al.
patent: 4857296 (1989-08-01), Brunelle et al.
patent: 4859432 (1989-08-01), David et al.
patent: 4868150 (1989-09-01), Spooner et al.
patent: 4940685 (1990-07-01), Sauvion et al.
patent: 4999180 (1991-03-01), Gourlaouen et al.
Alvero, R. et al, "Lanthanide Oxides: Preparation and Aging" J. Chem. Soc. Dalton Trans. (1), pp. 87-91, 1984, no month.
Alvero, R. et al, "Effect of the Precursor Salt on the Reactivity of La.sub.2 O.sub.3 ", J. Less-Common Metals, 112 (no month) (1985) pp. 347-354.
S. Bernal et al., "Analysis of Some Aspects of the Catalytic Behaviour Lanthanide Oxides", Jounral Of The Less-Common Metals, pp. 145-150 (1983), no month.
S. Brunauer et al., "Adsorption of Gases in Multimolecular Layers", Journal Of The American Chemical Society, vol. 60, No. 2, pp. 309-319 (Feb., 1938).
Final Report entitled, "Processing Studies For Optically Transparent LA.sub.2 O.sub.3 -Doped Y.sub.2 O.sub.3 ", Office of Naval Research, Contract No. N00014-82-C-0452, W. H. Rhodes et al, GTE Laboratories Incorporated, Jul. 31, 1986.
Chemical Abstracts, vol. 74, p. 470, #60296p, (no month) (1971), Columbus, Ohio.
David Claire
Seon Francoise
Bos Steven
Rhone-Poulenc Chimie
LandOfFree
Rare earth oxides does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rare earth oxides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rare earth oxides will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1411077