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US 5,393,793 AGranted
Oxide-based catalyst, production thereof, and catalytic hydrogenation of CO.sub.2 using said catalyst
OwnerTomoyuki Inuiinventor
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OwnerTomoyuki Inuiinventor
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A compound oxide X.sub.1 having the oxide composition CuO-ZnO-Cr.sub.2 O.sub.3 -Al.sub.2 O.sub.3 is physically admixed with a compound oxide X.sub.2 prepared by impregnating .gamma.-Al.sub.2 O.sub.3 with La(NO.sub.3).sub.3 and firing the same, to give a CuO-ZnO-Cr.sub.2 O.sub.3 -Al.sub.2 O.sub.3 -La.sub.2 O.sub.3 -based compound oxide with an La.sub.2 O.sub.3 addition level of 4% by weight. This compound oxide is reduced and packed into a reactor and a mixed gas composed of CO.sub.2 and H.sub.2 in a mole ratio of 1:3 is fed to the reactor, whereby methanol is obtained in high yield. The total conversion of CO.sub.2 amounts to 31.0%, the conversion to methanol being 22.9% (selectivity toward methanol 73.9%). When the pressure is 80 atmospheres, the conversion of CO.sub.2 amounts to 39%, the conversion to methanol being 29%.
An oxide-based catalyst which comprises a compound oxide having the oxide composition CuO-ZnO-Cr.sub.2 O.sub.3 -Al.sub.2 O.sub.3 -La*.sub.2 O.sub.3 (La* being La or any other lanthanide), wherein the oxide composition is as follows:
A method of producing an oxide-based catalyst which comprises physically admixing a compound oxide X.sub.1 having the oxide composition CuO-ZnO-Cr.sub.2 O.sub.3 -Al.sub.2 O.sub.3 with a compound oxide X.sub.2 prepared by impregnating Al.sub.2 O.sub.3 with a water-soluble salt of La* (La* being La or any other lanthanide) and drying and firing the impregnated Al.sub.2 O.sub.3 to give a compound oxide having the following oxide composition:
A method of producing an oxide-based catalyst which comprises impregnating a compound oxide X.sub.1 having the oxide composition CuO-ZnO-Cr.sub.2 O.sub.3 -Al.sub.2 O.sub.3 with a water-soluble salt of La* (La* being La or any other lanthanide) and drying and firing the impregnated compound oxide to give a compound oxide having the following oxide composition:
A method of catalytically hydrogenating CO.sub.2 which comprises feeding a mixed gas mainly composed of CO.sub.2 and H.sub.2 to a reactor and contacting said gas with an oxide-based catalyst prepared by reductively treating a compound oxide having the oxide composition CuO-ZnO-Cr.sub.2 O.sub.3 -Al.sub.2 O.sub.3 -La*2O.sub.3 (La* being La or any other lanthanide) to thereby cause conversion into a methanol-rich gas, under a reaction pressure of from 20 to 120 atmospheres at a reaction temperature of from 150.degree. to 300.degree. C. wherein the oxide composition is as follows:
An oxide-based catalyst for catalytic hydrogenation of CO.sub.2 which comprises a compound oxide having the oxide composition CuO-ZnO-Cr.sub.2 O.sub.3 -Al.sub.2 O.sub.3 -La*.sub.2 O.sub.3 (La* being La or any other lanthanide), wherein the oxide composition is as follows:
A method of producing an oxide-based catalyst for catalytic hydrogenation of CO.sub.2 which comprises physically admixing a compound oxide X.sub.1 having the oxide composition CuO-ZnO-Cr.sub.2 O.sub.3 -Al.sub.2 O.sub.3 with a compound oxide X.sub.2 prepared by impregnating Al.sub.2 O.sub.3 with a water-soluble salt of La* (La* being La or any other lanthanide) and drying and firing the impregnated Al.sub.2 O.sub.3 to give a compound oxide having the following oxide composition:
A method of producing an oxide-based catalyst for catalytic hydrogenation of CO.sub.2 which comprises impregnating a compound oxide X.sub.1 having the oxide composition CuO-ZnO-Cr.sub.2 O.sub.3 -Al.sub.2 O.sub.3 with a water-soluble salt of La* (La* being La or any other lanthanide) and drying and firing the impregnated compound oxide to give a compound oxide having the following oxide composition:
Dependencies are inferred from the claim text.