Layered divalent metal hydrogen phosphates

Patent 4846853 Issued on July 11, 1989. Estimated Expiration Date:

March 9, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3095269

3356448

3384453

3416884

Process for producing zinc phosphate
Patent #: 4207301
Issued on: 06/10/1980
Inventor: Danjushevskaya , et al.

Process for preparing apatite
Patent #: 4481175
Issued on: 11/06/1984
Inventor: Iino , et al.

Process for hydrotreating residual petroleum oil
Patent #: 4600503
Issued on: 07/15/1986
Inventor: Angevine , et al.

Regeneration of pillared clays with gas containing a small amount of ammonia Patent #: 4650779
Issued on: 03/17/1987
Inventor: Goldstein

Inventors

Assignee

Mobil Oil Corporation

Application

No. 07/023345 filed on 03/09/1987

US Classes:

95/117, Water sorbed210/689, Sorbing water from diverse liquid423/308, Orthophosphate (e.g., calcium hydroxyapatite)423/309, Utilizing phosphoric acid or its anhydride as reactant987/146, Pentavalent P having the structure (C)-P(=X) (X) (X) where X is chalcogen (9/38)987/165, Contains the structure (aryl group*)-P(=X) (X) (X) where * indicates a direct bond of one of the carbon atoms of the aryl group to the P atom (9/38A4)987/228, Containing the structure P-(O-carbocyclic ring) (9/12)987/29Contains aryl group (9/74; 9/74B; 9/74C; 9/76; 9/78)

Examiners

Primary: Doll, John
Assistant: Langel, Wayne A.

Attorney, Agent or Firm

International Classes

C01G 33/00 (20060101)
C01G 35/00 (20060101)
C01B 25/34 (20060101)
C01B 25/00 (20060101)
C01B 25/32 (20060101)
C01B 25/26 (20060101)
C01G 30/00 (20060101)
C01G 28/00 (20060101)
C01G 31/00 (20060101)
B01J 27/14 (20060101)
B01J 27/18 (20060101)
C07F 9/00 (20060101)
C07F 9/12 (20060101)
C07F 9/38 (20060101)
C07F 9/74 (20060101)
C07F 9/76 (20060101)

Abstract

Layered divalent metal hydrogen phosphate, MHPO4.nH₂ O wherein M is a Group IIA or Group IIB element and n ranges from about 0 to 2, is prepared by hydrothermal treatment of an aqueous mixture containing a source of metal oxide, a source of phosphorus oxide and a source of hydrogen atoms, said aqueous mixture having an initial pH ranging between about 3 and 10.

Other References

Weast, CRC Handbook of Chemistry and Physics, 61st Edition, CRC Press, Inc., Boca Raton, Fla., p. B-116
Abstracts of Papers, American Chemical Society, 194th ACS National Meeting, No. 287, (Jul. 1987) "Synthesis and Characterization of a Homologous Series of Divalent Metal Phosphonates, Mg(O₃ PR).multidot.H₂ O, Mn(o₃ PR).multidot.H₂ O and Ca(HO₃ PR)₂ "
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