초록 ▼

The present invention provides a method of preparing the copper-containing hydrogenation catalyst having high activity by liquid phase reduction without decreasing purity of the solvent and a method for efficiently producing an alcohol. The present invention provides the method of preparing the copp

The present invention provides a method of preparing the copper-containing hydrogenation catalyst having high activity by liquid phase reduction without decreasing purity of the solvent and a method for efficiently producing an alcohol. The present invention provides the method of preparing the copper-containing hydrogenation catalyst, including reducing a molded precursor of the copper-containing hydrogenation catalyst by supplying hydrogen gas or a mixture of hydrogen gas with an inert gas at a temperature of 50 to 150° C. in the presence of a solvent to obtain the copper-containing hydrogenation catalyst, wherein the reduction is conducted at an average reduction velocity of the copper-containing hydrogenation catalyst of not more than 3.0% by weight/hour. The present invention also provides the method of producing an alcohol, including preparing the copper-containing hydrogenation catalyst by the method of preparation, and subjecting a carboxylic acid or a carboxylic acid ester to catalytic reduction with hydrogen in the presence of the prepared copper-containing hydrogenation catalyst.

대표청구항 ▼

1. A method for preparing a copper-containing hydrogenation catalyst, comprising reducing a molded precursor of the copper-containing hydrogenation catalyst by supplying hydrogen gas or a mixture of hydrogen gas with an inert gas at a temperature of 50 to 150° C. in the presence of a solvent to obta

1. A method for preparing a copper-containing hydrogenation catalyst, comprising reducing a molded precursor of the copper-containing hydrogenation catalyst by supplying hydrogen gas or a mixture of hydrogen gas with an inert gas at a temperature of 50 to 150° C. in the presence of a solvent to obtain the copper-containing hydrogenation catalyst, wherein the reduction is conducted at an average reduction velocity of the copper-containing hydrogenation catalyst of not more than 2.5% by weight/hour. 2. The method according to claim 1, wherein the solvent is at least one selected from the group consisting of glyceride oil, fatty acid esters, aliphatic alcohols and hydrocarbons. 3. The method according to claim 1, wherein the precursor of the copper-containing hydrogenation catalyst is at least one oxide selected from the group consisting of copper-chromium oxides, copper-zinc oxides, copper-iron oxides, copper-aluminum oxides and copper-silica oxides. 4. The method according to claim 1, wherein a content of copper oxide is 5 to 98% by weight of the total weight of the precursor of the catalyst. 5. The method according to claim 1, wherein a concentration of hydrogen in a gas used in the reduction is 2 to 95% by volume. 6. The method according to claim 1, wherein an average reduction velocity of the copper-containing hydrogenation catalyst is determined from an amount of water produced by the reduction. 7. A method for producing an alcohol, comprising preparing a copper-containing hydrogenation catalyst by the method according to claim 1, and then subjecting a carboxylic acid or a carboxylic acid ester to catalytic reduction with hydrogen in the presence of the prepared copper-containing hydrogenation catalyst. 8. The method according to claim 1, wherein the reduction is conducted at a temperature-increasing rate of not less than 0.5° C./Hr and not more than 40° C./Hr. 9. The method according to claim 1, wherein the reduction is conducted at the average reduction velocity of not less than 0.5% by weight/hour. 10. A method for preparing a copper-containing hydrogenation catalyst, comprising reducing a molded precursor of the copper-containing hydrogenation catalyst by supplying hydrogen gas or a mixture of hydrogen gas with an inert gas at a temperature of 50 to 150° C. in the presence of a solvent in a reduction apparatus comprising a catalyst layer having an inlet and an outlet in order to obtain the copper-containing hydrogenation catalyst, wherein the reduction is conducted at an average reduction velocity of the copper-containing hydrogenation catalyst of not more than 2.5% by weight/hour; wherein a reduction velocity is controlled by regulating one or two or more of operational factors selected from a gas flow rate at the inlet of the catalyst layer, a concentration of hydrogen gas at the inlet of the catalyst layer, a temperature of gas at the inlet of the catalyst layer, an amount of a solvent, a temperature of the solvent and a temperature of a jacket of a reduction apparatus. 11. A method for preparing a copper-containing hydrogenation catalyst, comprising reducing a molded precursor of the copper-containing hydrogenation catalyst by supplying hydrogen gas or a mixture of hydrogen gas with an inert gas at a temperature of 50 to 150° C. in the presence of a solvent in a reduction apparatus comprising a catalyst layer having an inlet and an outlet in order to obtain the copper-containing hydrogenation catalyst, wherein the reduction is conducted at an average reduction velocity of the copper-containing hydrogenation catalyst of not more than 2.5% by weight/hour; wherein the reduction is conducted by controlling a temperature difference between the inlet of the catalyst layer and the outlet of the catalyst layer at not more than 40° C.