Chemistry of inorganic compounds – Phosphorus or compound thereof – Oxygen containing
Patent
1997-01-16
1999-08-17
Lewis, Michael
Chemistry of inorganic compounds
Phosphorus or compound thereof
Oxygen containing
423305, C01B 1516
Patent
active
059390395
ABSTRACT:
Uniformly sized and shaped particles of metal salts are provided comprised of one or more metal cations in combination with one or more simple oxoacid anions and a general method for the controlled precipitation of said metal salts from aqueous solutions. The methods proceed via the in situ homogeneous production of simple or complex oxoacid anions in which one or more of the nonmetallic elements e.g. Group 5B and 6B (chalcogenides), and 7B (halides) comprising the first oxoacid anion undergo oxidation to generate the precipitant anionic species along with concurrent reduction of the nonmetallic element of a second, dissimilar oxoacid anion. The oxoacid anions are initially present in solution with one or more metal cations known to form insoluble salts with the precipitant anion.
REFERENCES:
patent: 3679360 (1972-07-01), Rubin et al.
patent: 4149893 (1979-04-01), Aoki et al.
patent: 4612053 (1986-09-01), Brown et al.
patent: 4673355 (1987-06-01), Farris et al.
patent: 4711769 (1987-12-01), Inoue et al.
patent: 4849193 (1989-07-01), Palmer et al.
patent: 4880610 (1989-11-01), Constantz
patent: 4891164 (1990-01-01), Gaffney et al.
patent: 4897250 (1990-01-01), Sumita
patent: 5034352 (1991-07-01), Vit et al.
patent: 5047031 (1991-09-01), Constantz
patent: 5129905 (1992-07-01), Constantz
patent: 5302362 (1994-04-01), Bedard
patent: 5322675 (1994-06-01), Hakamatsuka
patent: 5338356 (1994-08-01), Hirano et al.
patent: 5409982 (1995-04-01), Imura et al.
patent: 5427754 (1995-06-01), Nagata et al.
patent: 5496399 (1996-03-01), Ison et al.
patent: 5522893 (1996-06-01), Chow et al.
patent: 5525148 (1996-06-01), Chow et al.
patent: 5545254 (1996-08-01), Chow et al.
Koutsoukos et al. Crystallization of calcium phosphates. A constant composition study J. Am. Chem. Soc. 1980 102:1553. No Month.
Wong et al. Prediction of precipitation and transformation behavior of calcium phosphate in aqueous media Hydroxyapatite and Related Materials 189-196 1994 CRC Press, Inc. No Month.
G.H. Nancollas In vitro studies of calcium phosphate crystallization Biomineralization--Chemical and Biochemical Perspectives 157-187 1989. No Month.
R.Z. LeGeros Preparation of octacalcium phosphate (OCP): A direct fast method Calcif. Tiss. Int. 1985 37:194. No Month.
Driessens et al. Effective formation for the preparation of calcium phosphate bone cements J. Mat. Sci.: Mat. Med. 1994 5:164. No Month.
R.Z. LeGeros Biodegradation and bioresorption of calcium phosphate ceramics Clin. Mat. 1993 14(1):65. No Month.
K. Ishikawa Properties and mechanisms of fast-setting calcium phosphate cements J. Mat. Sci.: Mat. Med. 1995 6:258. No Month.
Mirtchi et al. Calcium phosphate cements: Effect of fluorides on the setting and hardening of beta-tricalcium phosphate -dicalcium phosphate -calcite cements Biomat. 1991 12:505. No Month.
J.L. Lacout Calcium phosphate as bioceramics Biomaterials--Hard Tissue Repair and Replacement 81-95 1992 Elsevier Science Publishers. No Month
H. Monma et al. Properties of hydroxyapatite prepared by the hydrolysis of triacalcium phosphate J. Chem. Tech. Biotechnol. 1981 31:15. No Month.
H. Chaair et al. Precipitation of stoichiometric apatitic tricalcium phosphate prepared by a continuous process J. Mater. Chem. 1995 5(6):895. No Month.
R. Famery et al. Preparation of alpha-and beta-triacalcium phosphate ceramics, with and without magnesium addition Ceram. Int. 1994 20:327. No Month.
Y. Fukase et al. Setting reactions and compressive strengths of calcium phosphate cements J. Dent. Res. 1990 69(12):1852. No Month.
F. Abbona et al. Crystallization of calcium and magnesium phosphate from solutions of medium and low concentrations Cryst. Res. Technol. 1992 27:41. No Month.
G.H. Nancollas The involvement of calcium phosphates in biological mineralization and dimeralization processes Pure Appl. Chem. 1992 64(11):1673. No Month.
G.H. Nancollas et al. Formation and dissolution mechanisms of calcium phosphates in aqueous systems Hydroxyapatite and Related Materials 73-81 1994 CRC Press, Inc. No Month.
P.W. Brown et al. Variations in solution chemistry during the low temperature formation of hydroxyapatite J. Am. Ceram. Soc. 1991 74(8):1848. No Month.
G. Vereecke et al. Calculation of the solubility diagrams in the system Ca(OH).sub.2 -H.sub.3 PO.sub.4 -KOH-HNO.sub.3 -CO.sub.2 -H.sub.2 O J. Cryst. Growth 1990 104:820. No Month.
N.N. Greenwood et al. Oxoacids of phosphorus and their salts Chemistry of the Elements 586-595 1984 Pergamon Press. No Month.
PCT International Search Report dated Apr. 10, 1998, 1 page.
Erbe Erik M.
Sapieszko Ronald S.
Hendrickson Stuart L.
Lewis Michael
Orthovita, Inc.
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