Chemistry of inorganic compounds – Halogen or compound thereof – Binary compound containing metal
Patent
1996-08-12
1998-12-29
Straub, Gary P.
Chemistry of inorganic compounds
Halogen or compound thereof
Binary compound containing metal
23300, C01B 900, C01G 502
Patent
active
058536914
ABSTRACT:
Methods are disclosed in which first and second reactant salts and a complexing agent are added to a non-aqueous reaction solvent in which the complexing agent is soluble. The complexing agent is a crown ether or other cyclic or acyclic polydentate chelating agent that, in the reaction solvent, forms chelation complexes with at least one of the reactant salts. The reactant salts, which are substantially soluble and reactive with each other in water to form a first crystallite of silver halide, are present in the reaction solvent in relative amounts that are sufficient to form a desired amount of the silver halide in the reaction solvent. Reaction of the first and second reactant salts in the reaction solvent forms a second crystallite precipitate comprising crystals of silver halide having a different habit or morphology from silver halide crystals in the first crystallite that would otherwise be formable in water by reaction of similar amounts of the first and second reactant salts.
REFERENCES:
patent: 4308031 (1981-12-01), Au
patent: 4347230 (1982-08-01), Nicolau
patent: 4436664 (1984-03-01), Gokel
patent: 4474963 (1984-10-01), Gokel
patent: 4687844 (1987-08-01), Gokel et al.
patent: 4710455 (1987-12-01), Iguchi et al.
patent: 4724200 (1988-02-01), Maskasky
patent: 5213772 (1993-05-01), Ichikawa et al.
patent: 5258275 (1993-11-01), Arai et al.
patent: 5320822 (1994-06-01), Ozin et al.
patent: 5443943 (1995-08-01), Szajewski
patent: 5545394 (1996-08-01), Doxsee
Doxsee et al., "Complexation-Mediated Crystallization of Sodium Acetate Trihydrate Needles from Cyclohexane Solution,"J. Inclusion Phenom. 9:327-336 (1990).
Doxsee et al., "Unusual Coordination Number and Geometry in a Potassium 18-Crown-6 Complex,"J. Am. Chem. Soc. 114:5165-5171 (1992).
Bianconi et al., "Crystallization of an Inorganic Phase Controlled by a Polymer Matrix,"Nature 349:315-317 (1991).
Nicolau, "Solution Growth of Sparingly Soluble Single Crystals from Soluble Complexes--I. General Introduction,"J. Crystal Growth 48:45-50 (1980).
Nicolau, "Solution Growth of Sparingly Soluble Single Crystals from Soluble Complexes--II. Growth of .alpha.-HgI.sub.2 Single Crystals from Iodomercurate Complexes,"J. Crystal Growth 48 :51-60 (1980).
Nicolau et al., "Solution Growth of Sparingly Soluble Single Crystals from Soluble Complexes--III. Growth of .alpha.-HgI.sub.2 Single Crystals from Dimethylsulfoxide Complexes,"J.Crystal Growth 48 :61-73 (1980).
Boulin, et al., "Gel-Growth of Silver Acetate Crystals,"J. Crystal Growth 6 :290-292 (1970).
Armington, et al., "Recrystallization by Shifting the Equilibrium of Chemical Complexes--The Growth of Cinnabar,"J. Crystal Growth 6 :278-280 (1970).
State of Oregon acting by and through the Oregon State Board of
Straub Gary P.
LandOfFree
Silver halides of altered crystal habit or morphology and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Silver halides of altered crystal habit or morphology and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Silver halides of altered crystal habit or morphology and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1421304