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Patent US4711769A successfully refreshed from Google Patents.
US4711769A
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Calcium-phosphorus-apatite having novel properties and process for preparing the same
Assignee: Kanto Chemical Co Inc
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Filing: 1985-12-18
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Granted: 1987-12-08
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Expires: 2005-12-18
Abstract
Abstract PCT No. PCT/JP85/00693 Sec. 371 Date Jul. 30, 1986 Sec. 102(e) Date Jul. 30, 1986 PCT Filed Dec. 18, 1985 PCT Pub. No. WO86/03733 PCT Pub. Date Jul. 3, 1986.The present invention relates to a process for preparing a calcium-phosphorus-apatite, essentially characterized by admixing a single solvent of water or an organic solvent compatible with water or a mixed solvent of water with an organic solvent compatible with water with calcium and phosphorus compounds soluble in said single or mixed solvent to prepare a raw material solution, and atomizing the raw material solution into a flame or a heating zone for effecting a thermal decomposition reaction thereof to form a calcium-phosphorus-apatite; a calcium-phosphorus-apatite obtained by the process and having novel characteristics; and the use of the calcium-phosphorus-apatite as a chromatographic packing material.
Inventors
- 👤 Senya Inoue
- 👤 Akira Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:15
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/04; B01J20/048; B01J20/281; B01J20/282; C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/32; C01B25/322; C01B25/325; C01B25/455; B01J2220/00; B01J2220/50; B01J2220/54
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
107 words
A process for the preparation of calcium-phosphorus-apatite comprising: (a) admixing a solvent system with a calcium compound and a phosphorus compound soluble in said solvent system to prepare a raw material solution, said solvent system being water, or an organic solvent compatible with water or a mixture of water and an organic solvent compatible with water, and said raw material solution has an atomic ratio of Ca/P of calcium to phosphorus of 1.60 to 1.85; (b) atomizing said raw material solution in a flame or heating zone at a temperature sufficient to effect thermal decomposition of said raw material solution; and (c) recovering the produced calcium-phosphorus-apatite product.
Claim 2
Dependent Claim
107 words
A process for the preparation of calcium-phosphorus-apatite comprising: (a) admixing a solvent system with a calcium compound and a phosphorus compound soluble in said solvent system to prepare a raw material solution, said solvent system being water, or an organic solvent compatible with water or a mixture of water and an organic solvent compatible with water, and said raw material solution has an atomic ratio of Ca/P of calcium to phosphorus of 1.60 to 1.85; (b) atomizing said raw material solution in a flame or heating zone at a temperature sufficient to effect thermal decomposition of said raw material solution; and (c) recovering the produced calcium-phosphorus-apatite product.
Claim 3
Dependent Claim
113 words
A process for the preparation of a calcium-phosphorus-apatite comprising: (a) admixing a solvent system with a calcium compound and a phosphorus compound soluble in said solvent systems to prepare a raw material solution, said solvent system being water, or an organic solvent compatible with water or a mixture of water and an organic solvent compatible with water, and said raw material solution has an atomic ratio of Ca/P of calcium to phosphorus of 1.60 to 1.85; (b) atomizing said raw material solution in a flame or heating zone at a temperature sufficient to effect thermal decomposition of said raw material solution; (c) heat-treating the resultant powder; and (d) recovering the produced calcium-phosphorus-apatite product.
Claim 4
Dependent Claim
113 words
A process for the preparation of a calcium-phosphorus-apatite comprising: (a) admixing a solvent system with a calcium compound and a phosphorus compound soluble in said solvent systems to prepare a raw material solution, said solvent system being water, or an organic solvent compatible with water or a mixture of water and an organic solvent compatible with water, and said raw material solution has an atomic ratio of Ca/P of calcium to phosphorus of 1.60 to 1.85; (b) atomizing said raw material solution in a flame or heating zone at a temperature sufficient to effect thermal decomposition of said raw material solution; (c) heat-treating the resultant powder; and (d) recovering the produced calcium-phosphorus-apatite product.
Claim 5
Dependent Claim
21 words
A process according to claim 2, wherein said heat treatment is conducted at a temperature of about 1,000° to 1,300° C.
Claim 6
Dependent Claim
51 words
A process according to claim 1 or 2, wherein said calcium compound is an inorganic calcium compound and said phosphorus compound is an inorganic phosphorus compound, and an acid is admixed with said solvent system for effecting dissolution of said calcium and phosphorus compounds to prepare an acidic raw material solution.
Claim 7
Dependent Claim
15 words
A process according to claim 4, wherein said acid is nitric acid or hydrochloric acid.
Claim 8
Dependent Claim
53 words
A process according to claim 1 or 2, wherein said calcium compound is an inorganic calcium compound and said phosphorus compound is an organic phosphorus compound, and at least one member selected from ammonium chloride and ammonium bromide is admixed with said solvent system for effecting dissolution of said calcium and phosphorus compounds.
Claim 9
Dependent Claim
53 words
A process according to claim 1 or 2, wherein said calcium compound is an inorganic calcium compound and said phosphorus compound is an organic phosphorus compound, and at least one member selected from aqueous ammonium and an amine is admixed with said solvent system for effecting dissolution of said calcium and phosphorus compounds.
Claim 10
Dependent Claim
44 words
A process according to claim 1 or 2, wherein (a) said calcium and phosphorus compounds are both inorganic compounds and an acid is admixed with said solvent system for effecting dissolution of said calcium and phosphorus compounds to prepare an acidic raw material solution.
Claim 11
Dependent Claim
15 words
A process as claimed in claim 8, wherein said organic solvent is a lower dialkylketone.
Claim 12
Dependent Claim
24 words
A process as claimed in claim 8, wherein said organic solvent is a di- or tri-hydric lower alkanol or a lower alkoxyl lower alkanol.
Claim 13
Dependent Claim
28 words
A process as claimed in claim 8, wherein said organic solvent is a member selected from the group consisting of ketones, hydroxyketones, carboxylic acids, dimethylacetamide, and 2-ethoxyethyl acetate.
Claim 14
Dependent Claim
87 words
A process according to claim 1 or 2, wherein said calcium and phosphorus compounds are selected from the group consisting of Ca(NO 3 ) 2 .4H 2 O; Ca(CH 3 COO) 2 .2H 2 O; CaCl 2 .H 2 O; CaBr 2 .2H 2 O; CaHPO 4 .2H 2 O; NH 4 H 2 PO 4 ; NH 4 H 2 PO 3 ; NH 4 H 2 PO 2 ; H 3 PO 4 ; H 3 PO 3 ; and H 3 PO 2 .
Claim 15
Dependent Claim
65 words
A process according to claim 1 or 2, wherein said calcium compound is an inorganic calcium compound and said phosphorus compound is an organic phosphorus compound and at least one member selected from ammonium chloride and ammonium bromide or at least one member selected from aqueous ammonium and an amine is admixed with said solvent system for effecting dissolution of said calcium and phosphorus compounds.
Claim 16
Dependent Claim
68 words
A process according to claim 13, wherein said organic phosphorus compound is selected from the group consisting of (CH 3 O) 3 P; (C 2 H 5 O) 3 P; [(CH 3 ) 2 CHO] 3 P; [CH 3 (CH 2 ) 3 O] 3 P; (C 6 H 5 ) 3 P; (C 2 H 5 O) 2 POH and (C 6 H 5 ) 3 PO.
Claim 17
Dependent Claim
24 words
A process as claimed in claim 7, 8 or 13, wherein said organic solvent is a lower alcohol having 1 to 5 carbon atoms.
Claim 18
Dependent Claim
18 words
A process as claimed in claim 7 or 13, wherein said organic phosphorus compound is a phosphorus alkoxide.
Claim 19
Dependent Claim
17 words
A process as claimed in claim 7 or 13, wherein said organic phosphorus compound is triethyl phosphite.
References Cited (Backward Citations)
US3023083A
Cited
US4481175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-07 | 1991-06-08 | 1991-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-07 | 1995-06-08 | 1995-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-07 | 1999-06-08 | 1999-12-08 | $7700.00 | Window Closed / Lapsed |