Process for preparing inorganic metal oxygen composition capable of dehydrocoupling toluene
AssigneeExxon Research & Engineering Co.
InventorsHarry H. Teng, I-Der Huang, Hsuan L. Labowsky
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Abstract
A process for preparing a metal oxygen composition capable of dehydrocoupling toluene wherein metal oxides such as Sb.sub.2 O.sub.3, PbO, and Bi.sub.2 O.sub.3 are admixed with an organic media such as isobutanol and heated to form a metal oxygen precursor composition which is recovered and calcined is disclosed.
Claims88
A process for preparing a precursor metal oxygen composition capable of dehydrocoupling toluene when calcined which comprises:
- (i) reacting a mixture of metal oxides in the presence of at least one alcohol under substantially anhydrous conditions of less than about 1%, by weight water, based on the weight of organic alcohol present, said organic alcohol being present in an amount of at least 3 moles of said alcohol per mole of metal in the metal oxide mixture, the metals of said metal oxide mixture having (a) at least one member selected from the group consisting of Bi, and Pb, and (b) at least one member selected from the group consisting of Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba, Sb, Ag, Au, and Cu;
- and
- (ii) separating the precursor composition from the organic alcohol.
A process for preparing a metal oxygen composition capable of dehydrocoupling toluene said metal oxygen composition comprising metals having a gram atom ratio represented by the formula:
- A.sub.a B.sub.b O.sub.x
- wherein in said formula A and B, are different and;
- (i) "A" represents at least one metal selected from the group consisting of Bi, and Pb;
- (ii) "B" represents from 1 to 3 of the metals selected from the group consisting of Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba, Sb, Ag, Au, and Cu;
- and
- (iii) "a" independently represents a number of about 1, "b" independently represents a number of from about 0.01 to about 100, and "x" represents a number which satisfies the average valences of metals A and B as they exist in said composition, which comprises:
- (1) admixing at least two metal oxides with at least one organic alcohol to form a reaction mixture having present therein at least 3 moles of organic alcohol per mole of metal in the metal oxide mixture, the identity and molar ratio of said metal oxides in the reaction mixture being selected to yield a gram atom relationship in accordance with said formula in the metal oxygen composition;
- (2) heating said reaction mixture to a temperature of at least 75.degree. C. to form a metal oxygen precursor composition and water, said heating being conducted under substantially anhydrous conditions of less than about 1%, by weight water, based on the weight of the organic alcohol;
- (3) separating said precursor composition from the organic alcohol;
- and
- (4) calcining said precursor composition to yield said metal oxygen composition.
A process for dehydrocoupling a hydrocarbon fees selected from toluene, toluene derivative, and mixtures thereof which comprises contacting said hydrocarbon in the vapor phase at a temperature of from about 300.degree. to about 650.degree. C. with a metal oxygen composition, said metal oxygen composition being prepared by the process which comprises:
- (i) reacting a mixture of metal oxides in the presence of at least one organic alcohol under substantially anhydrous conditions of less than about 1%, by weight, water based on the weight of the organic alcohol present, said organic alcohol being present in an amount of at least 3 moles of said alcohol per mole of metal in the metal oxide mixture to form a metal oxygen precursor composition, the metals of said metal oxide mixture having (a) at least one member selected from the group consisting of Bi, and Pb and (b) at least one member selected from the group consisting of Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba, Sb, Ag, Au, and Cu;
- (ii) separating the precursor composition from the organic alcohol;
- and
- (iii) calcining said precursor composition.
A process for preparing a precursor metal oxygen composition capable of dehydrocoupling toluene when calcined which comprises:
- (i) reacting a mixture of metal oxides in the presence of at least one organic alcohol under substantially anhydrous conditions, the metals of said metal oxide mixture comprising those represented by a member selected from the group consisting of (a) at least two of Sb, Pb and Bi;
- of (b) Bi and Zn, to form a catalyst precursor metal oxygen composition;
- and
- (ii) separating the precursor metal oxygen composition from said organic alcohol.
A process for preparing a metal oxygen composition capable of dehydrocoupling toluene, said metal oxygen composition comprising metals having a gram atom ratio represented by the formula:
- Sb.sub.c Pb.sub.d Bi.sub.e O.sub.x
- wherein "c" represents a number of about 1, "d" represents a number of from about 0.2 to about 10, "e" represents a number of from 0 to about 5, and "x" represents a number which satisfies the average valences of the metals Sb, Pb, Bi, as they exist in said composition, which comprises:
- (1) admixing at least two metal oxides with at least one organic alcohol to form a reaction mixture, the identity and molar ratio of said metal oxides in the reaction mixture being selected to yield a gram atom relationship in accordance with said formula in the metal oxygen composition;
- (2) heating said reaction mixture to form a metal oxygen precursor composition and water, said heating being conducted under substantially anhydrous conditions;
- (3) separating said precursor composition from the organic alcohol;
- and
- (4) calcining said precursor composition to yield said metal oxygen composition.
A process for dehydrocoupling a hydrocarbon feed selected from toluene, toluene derivative, and mixtures thereof which comprises contacting said hydrocarbon in the vapor phase at a temperature of from about 300.degree. to about 650.degree. C. with a metal oxygen composition, said metal oxygen composition being prepared by the process which comprises:
- (1) reacting a mixture of metal oxides in the presence of at least one organic alcohol under substantially anhydrous conditions, the metals of said metal oxide mixture comprising those represented by a member selected from the group consisting of (a) at least two of Sb, Pb, and Bi;
- or (b) Bi and Zn;
- in a manner and under conditions sufficient to form a catalyst precursor composition;
- (ii) separating the precursor composition from the organic alcohol;
- and
- (iii) calcining said precursor composition.
A process for preparing a metal oxygen composition capable of dehydrocoupling toluene, said metal oxygen composition comprising metals having a gram atom ratio represented by the formula:
- D.sub.u E.sub.v Sb.sub.y Bi.sub.z O.sub.x
- wherein:
- (i) "D" represents at least one member selected from the group consisting of Li, Na, K, Rb, Cs, Mg, Ca, Si, and Ba;
- (ii) "E" represents at least one member selected from the group consisting of Pb, Au, Ag, and Cu;
- and
- (iii) "u" represents a number which can vary from about 0 to about 10;
- "v" represents a number which can vary from about 0 to about 10;
- "y" represents a number of which can vary from about 0.5 to about 5;
- "z" represents a number which can vary from about 0.01 to about 10;
- and "x" is a number which satisfies the average valences of metals "D", "E", Sb, and Bi, and they exist in said composition, which comprises:
- (1) admixing at least two metal oxides with at least one organic alcohol to form a reaction mixture having present therein at least 3 moles of oganic alcohol per mole of metal in the metal oxide mixture, the identity and molar ratio of said metal oxides in the reaction mixture being selected to yield a gram atom relationship in accordance with said formula in the metal oxygen composition;
- (2) heating said reaction mixture to form a metal oxygen precursor composition and water, said heating being conducted under substantially anhydrous conditions of less than about 1%, by weight, water, based on the weight of the organic alcohol;
- (3) separating said precursor composition from the organic alcohol;
- and
- (4) calcining said precursor composition to yield said metal oxygen composition.
The process of 49 wherein said reaction of Step (i) is conducted by refluxing a reaction mixture comprising from about 1 to about 60%, by weight, metal oxide mixture, and from about 99 to about 40%, by weight, of at least one organic alcohol in a manner and under conditions sufficient to remove water as it forms.
A process for dehydrocoupling hydrocarbon feed selected from toluene, toluene derivative, and mixtures thereof which comprises contacting said hydrocarbon in the vapor phase at a temperature of from about 300.degree. to about 650.degree. C. with a metal oxygen composition, said metal oxygen composition comprising metals having a gram atom ratio represented by the formula:
- D.sub.u E.sub.v Sb.sub.y Bi.sub.z O.sub.z
- wherein:
- (i) "D" represents at least one member selected from the group consisting of Li, Na, K, Rb, Cs, Mg, Ca, Sr, and Ba;
- (ii) "E" represents at least one member selected from the group consisting of Pb, Au, Ag, and Cu;
- and
- (iii) "u" represents a number which can vary from about 0 to about 10;
- "v" represents a number which can vary from about 0 to about 10;
- "y" represents a number which can vary from about 0.5 to about 5;
- "z" represents a number which can vary from about 0.01 to about 10;
- and "x" is a number which satisfies the average valences of metals "D", "E", Sb, and Bi, and they exist in said composition, and said metal oxygen composition being prepared by the process comprising:
- (1) admixing at least two metal oxides with at least one organic alcohol to form a reaction mixture having present therein at least 3 moles of organic alcohol per mole of metal in the metal oxide mixture, the identity and molar ratio of said metal oxides in the reaction mixture being selected to yield a gram atom relationship in accordance with said formula in the metal oxygen composition;
- (2) heating said reaction mixture to form a metal oxygen precursor composition and water, said heating being conducted under substantially anhydrous conditions of less than about 1%, by weight, water, based on the weight of the organic alcohol;
- (3) separating said precursor composition from the organic alcohol;
- and
- (4) calcining said precursor composition to yield said metal oxygen composition.
A process for preparing a precursor metal oxygen composition capable of dehydrocoupling toluene when calcined which comprises:
- (i) reacting a mixture of metal oxides in the presence of at least one organic alcohol under substantially anhydrous conditions, the metals of said metal oxide mixture comprising those represented by a member selected from the group consisting of (a) Sb, Pb, and Bi, (b) Bi and Zn, (c) Pb and K, (d) Bi and Ag, (e) Au, Sb, and Bi, (f) Pb and Ba, and (g) mixtures thereof to form a catalyst precursor metal oxygen composition;
- and
- (ii) separating the precursor metal oxygen composition from said organic alcohol.
A process for dehydrocoupling a hydrocarbon feed selected from toluene, toluene derivative, and mixtures thereof which comprises contacting said hydrocarbon in the vapor phase at a temperature of from about 300.degree. to about 650.degree. C. with a metal oxygen composition, said metal oxygen composition being prepared by the process which comprises:
- (1) reacting a mixture of metal oxides in the presence of at least one organic alcohol under substantially anhydrous conditions, the metals of said metal oxide mixture comprising those represented by a member selected from the group consisting of (a) Sb, Pb, and Bi, (b) Bi and Zn, (c) Pb and K, (d) Bi and Ag, (e) Au, Sb, and Bi, (f) Pb and Ba, and (g) mixtures thereof in a manner and under conditions sufficient to form a catalyst precursor composition;
- (ii) separating the precursor composition from the organic alcohol;
- and
- (iii) calcining said precursor composition.
Dependencies are inferred from the claim text.