Nickel and cobalt containing hydrotalcite-like materials having a sheet-like morphology and process for production thereof
Patent 5518704 Issued on May 21, 1996. Estimated Expiration Date: 
March 20, 2015. 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.
March 20, 2015. 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.Patent References 3796792 Hydrotalcites having a hexagonal needle-like crystal structure and process for production thereof Catalysts for aldol condensations Basic mixed oxide Mixed metal framework compositions for monoalkylene glycol production Method of making isophorne Patent #: 5202496 InventorsAssigneeApplicationNo. 407556 filed on 03/20/1995US Classes:423/420.2, Plural metal containing556/28, Plural diverse heavy metals containing556/31Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl containing, etc.)ExaminersPrimary: Langel, Wayne A.Attorney, Agent or FirmInternational ClassC01B 031/30AbstractA synthetic nickel (or cobalt) containing hydrotalcite-like material having a sheet-like morphology and a sheet broadness to thickness ratio of at least 50 and a formula M1-x Alx (OH)2 ⋅xA⋅mH2 O where M is Ni or Co, A is a mono carboxylic anion of the form RCOO- where R is Cn H2n+1 and n=0-5, and x and m are numbers satisfying the following conditions:0.2<=x<=0.40.0<=m<=4It is made by starting with a synthesis mixture having Ni or Co (divalent cation) to aluminum (trivalent cation) molar ratio between 1:1 and 10:1, mono carboxylic anion to aluminum (trivalent cation) molar ratio between 0.1:1 to 1.2:1 and optionally added other anions. The process comprises of reacting a mixture comprising nickel (or cobalt) and aluminum cations and mono carboxylic anions in an aqueous slurry at a temperature of at least 40° C. and a pH of at least 7.Other References
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