Layered divalent metal phosphates containing pendent substituent groups and their preparation
AssigneeMobil Oil Corporation
InventorStuart D. Hellring
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Abstract
Layered divalent metal pentavalent metallate, M(HAO.sub.4).sub.x (RAO.sub.3).sub.y (Z).sub.z wherein M is divalent metal, A is a pentavalent metal, e.g. phosphorus, R is a substituent group other than H or OH, e.g., phenyl, covalently bonded to A, x+y=1, y is greater than 0, z ranges from 0 to 2, inclusive, and Z is an intercalated moiety is prepared by contacting a source of divalent metal with a substituted phosphonic acid-type compound under hydrothermal conditions.
Claims19
A method for preparing a layered divalent metal phosphate-type composition having the formula M(HAO.sub.4).sub.x (RAO.sub.3).sub.y (Z).sub.z wherein M is a divalent metal, A is a pentavalent atom, R is a substituent group other than H or OH, covalently bonded to A, Z is an intercalated moiety, x+y=1, y is greater than 0, and z ranges from 0 to 2, said method comprising hydrothermally treating an aqueous reaction mixture having an initial pH prior to said treatment ranging from about 3 to 10 and containing a source of divalent metal, M, and at least one acid of the formula ((HO).sub.2 OA)R having a phosphonate structure, wherein A is a pentavalent atom, and R is a ligand other than H and OH, said reaction mixture having a molar ratio of M:A of about 0.8 to 1.2.
Dependencies are inferred from the claim text.