Catalyzed vapor phase process for making synthesis gas
AssigneeAmoco Corporation
InventorsAlakananda Bhattacharyya, Mark S. Kleefisch, Carl A. Udovich
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Abstract
A process is disclosed for preparing a synthesis gas comprising hydrogen and carbon monoxide by partial oxidation of hydrocarbyl compounds using a source of oxygen comprising molecular oxygen, carbon dioxide, or mixtures thereof in the presence of a catalyst comprising thermally stable mixtures formed by heat treating a hydrotalcite-like compound.
Claims21
A catalyst composition suitable to prepare synthesis gas comprising hydrogen and carbon monoxide by partial oxidation of hydrocarbyl compounds using a source of oxygen comprising molecular oxygen or carbon dioxide which composition comprising a mixture formed by heat treating to a temperature of at least about 500.degree. C., a catalyst precursor composition having formula
- [Mg.sup.2+.sub.w Al.sup.3+.sub.2-y Rh.sup.3+.sub.y (OH).sub.2(w+2) ].sup.2+ CO.sub.3.sup.2- .cndot.mH.sub.2 O
- where y is a number in a range from about 0.00001 to about 1.5;
- w is a number in a range from about 2 to about 20;
- and m is 0 or a positive number.
A catalyst precursor composition comprising at least one hydrotalcite compound having formula
- [Mg.sup.2+.sub.w Al.sup.3+.sub.2-y Rh.sup.3+.sub.y (OH).sub.2(w+2) ].sup.2+ CO.sub.3.sup.2- .cndot.mH.sub.2 O
- where y is a number in a range from about 0.00001 to about 1.5;
- w is a number in a range from about 2 to about 20;
- and m is 0 or a positive number.
A catalyst composition suitable to prepare synthesis gas comprising hydrogen and carbon monoxide by partial oxidation of hydrocarbyl compounds using a source of oxygen comprising molecular oxygen or carbon dioxide which composition comprises a mixture formed by heat treating under reforming conditions to temperatures in a temperature range upward from at least about 400.degree. C., a hydrotalcite compound having formula
- [M.sup.2+.sub.w Al.sup.3+.sub.2-y M.sup.3+.sub.y (OH).sub.2(w+2) ].sup.2+ (A.sup.n-.sub.2/n).cndot.mH.sub.2 O
- where
- M.sup.2+ is at least one divalent metal ion selected from the group consisting of magnesium, chromium, manganese, iron, cobalt, nickel, copper, and zinc ions;
- M.sup.3+ is at least one trivalent metal ion selected from the group consisting of titanium, vanadium, chromium, manganese, iron, cobalt, nickel, gallium, ruthenium, rhodium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, and iridium ions;
- w is a number in a range from about 2 to about 20;
- y is a number in a range from about 0 to about 2;
- A.sup.n- is an anion having a negative charge of n;
- and
- m is 0 or a positive number.
A catalyst composition suitable to prepare synthesis gas comprising hydrogen and carbon monoxide by partial oxidation of hydrocarbyl compounds using a source of oxygen comprising molecular oxygen or carbon dioxide which composition comprises a mixture formed by heat treating under reforming conditions to temperatures in a temperature range upward from at least about 400.degree. C., a hydrotalcite compound having formula
- [M.sup.2+.sub.w Al.sup.3+.sub.2-y M.sup.3+.sub.y (OH).sub.2(w+2) ].sup.2+ (A.sup.n-.sub.2/n).cndot.mH.sub.2 O
- where
- M.sup.2+ is magnesium ion;
- M.sup.3+ is rhodium or iron ions;
- w is a number in a range from about 2 to about 20;
- y is a number in a range from about 0 to about 2;
- A.sup.n- is an anion having a negative charge of n;
- and
- m is 0 or a positive number.
Dependencies are inferred from the claim text.