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Calcium and lanthanum solid base catalysts for transesterification

United States Patent

9,089,833
July 28, 2015
View the Complete Patent at the US Patent & Trademark Office
In one aspect, a heterogeneous catalyst comprises calcium hydroxide and lanthanum hydroxide, wherein the catalyst has a specific surface area of more than about 10 m.sup.2/g. In another aspect, a heterogeneous catalyst comprises a calcium compound and a lanthanum compound, wherein the catalyst has a specific surface area of more than about 10 m.sup.2/g, and a total basicity of about 13.6 mmol/g. In further another aspect, a heterogeneous catalyst comprises calcium oxide and lanthanum oxide, wherein the catalyst has a specific surface area of more than about 10 m.sup.2/g. In still another aspect, a process for preparing a catalyst comprises introducing a base precipitant, a neutral precipitant, and an acid precipitant to a solution comprising a first metal ion and a second metal ion to form a precipitate. The process further comprises calcining the precipitate to provide the catalyst.
Ng; K.Y. Simon (West Bloomfield, MI), Yan; Shuli (Detroit, MI), Salley; Steven O. (Grosse Pointe Park, MI)
WAYNE STATE UNIVERSITY (Detroit, MI)
13/ 127,614
20110209388
November 5, 2009
This invention was made with government support awarded by the Department of Energy (Grant DEFG36-05GO85005). The government has certain rights in the invention.