The present invention provides a slurry catalyst and a method for preparing the same, and belongs to the technical field of preparing catalyst. Particularly, the present invention provides a slurry catalyst directly used in a slurry bed reactor for synthesizing methanol and dimethyl ether and a meth
The present invention provides a slurry catalyst and a method for preparing the same, and belongs to the technical field of preparing catalyst. Particularly, the present invention provides a slurry catalyst directly used in a slurry bed reactor for synthesizing methanol and dimethyl ether and a method for preparing the same, which uses the complete liquid phase preparation from solution to slurry without the conventional slurry-producing process of firstly forming a solid catalyst and dispersing it into an inert medium after crushing and milling. This catalyst mainly comprises Cu, Zn, Al and Zr, wherein atomic ratios of each of components are Cu/Zn/(Al+Zr)=1/0.1-5/0.15-15 and Zr/Al=1:1.0-1:30, and one or two selected from the group consisting of lanthanide metals, Mn, Mo, Si, V, W, Cr, Mg, Ni, K, Pd, Rh, Ru, Re, Pt and Sr is used a promoter. The catalyst prepared in the present invention has the advantages of good stability, high selectivity of alcohol and ether, good rheological behavior and strong wear resistance.
대표청구항▼
1. A method for preparing a slurry catalyst according to a composition of a general formula of CuZnMZrAl, wherein the atomic ratios of each of components are as follows: Cu/Zn/(Al+Zr)=1/0.1-5/0.15-15 and Zr/Al=1:1.0-1:30, and M is a promoter which is one or two selected from the group consisting of
1. A method for preparing a slurry catalyst according to a composition of a general formula of CuZnMZrAl, wherein the atomic ratios of each of components are as follows: Cu/Zn/(Al+Zr)=1/0.1-5/0.15-15 and Zr/Al=1:1.0-1:30, and M is a promoter which is one or two selected from the group consisting of lanthanide metals, Mn, Mo, Si, V, W, Cr, Mg, Ni, K, Pd, Rh, Ru, Re, Pt and Sr, and M:Cu is 0-0.5, for synthesizing methanol and dimethyl ether in a slurry bed reactor which comprises: I. mixing aluminum isopropoxide, zirconium oxynitrate, cupric nitrate and zinc nitrate as raw materials to prepare a gel A containing CuZnMZrAl components by way of a combination-multistep feeding, wherein a promoter M is added together with cupric nitrate;II. after stewing and aging, gel A is subjected to azeotropic distillation treatment to prepare gel B;III. dispersing homogeneously gel B in an organic medium in the presence of a surfactant to prepare gel dispersion C; andIV. treating gel dispersion C in a reaction kettle with 100% inert gas for 2-72 hours under programmed temperature ranging from room temperature to 673K and at a heating rate of from 0.5K/min to 20K/min to prepare the slurry catalyst. 2. The method of claim 1 for preparing a slurry catalyst wherein said combination-multistep feeding comprises feeding aluminum isopropoxide, zirconium oxynitrate, cupric nitrate and zinc nitrate in a sequential way of any combination thereof in two, three or four steps. 3. The method of claim 1 for preparing a slurry catalyst wherein the azeotropic agent in said azeotropic distillation is an oxygen-containing organic compound or a nitrogen-containing organic compound. 4. The method of claim 1 for preparing a slurry catalyst wherein said surfactant is an ionic, non-ionic or amphoteric surfactant, and the addition amount thereof is 0.1 to about 10%. 5. The method of claim 1 for preparing a slurry catalyst wherein said inert gas comprises N2, Ar, or He. 6. A method for preparing a slurry catalyst according to the general formula of CuZnMZrAl, wherein the atomic ratios of each of components are as follows: Cu/Zn/(Al+Zr)=1/0.1-5/0.15-15 and Zr/Al=1:1.0-1:30, and M is a promoter which is one or two selected from the group consisting of lanthanide metals, Mn, Mo, Si, V, W, Cr, Mg, Ni, K, Pd, Rh, Ru, Re, Pt and Sr, and M:Cu is 0-0.5, wherein said slurry catalyst is prepared in the liquid phase without isolating or re-dispersing a solid catalyst which comprises: I. admixing aluminum isopropoxide, zirconium oxynitrate, cupric nitrate, and zinc nitrate as raw materials by way of a combination multi-step feeding, and a promoter M selected from the group consisting of lanthanide metals, Mn, Mo, Si, V, W, Cr, Mg, Ni, K, Pd, Rh, Ru, Re, Pt, Sr where M:Cu is 0 to 0.5 is added together with cupric nitrate thereby preparing gel A;II. stewing and aging gel A and then subjecting gel A to azeotropic distillation to prepare gel B;III. dispersing gel B in an organic medium in the presence of a surfactant to prepare gel C;IV. treating gel C with 100% inert gas for 2-72 hours under a programmed temperature from room temperature to 673 K at a heating rate of from 0.5k/min. to 20K/min to provide a slurry catalyst. 7. The method of claim 6 wherein a provided slurry catalyst is contacted with syngas in a slurry bed reactor to produce methanol and dimethyl ether.
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