초록 ▼

A process for producing a catalyst body includes providing titanium dioxide, tungsten trioxide, vanadium pentoxide, aluminum oxide, and/or silicon oxide for the catalyst body. A kneadable and/or shapable compound is processed to form a shaped body by extrusion or by coating of a support body. The sh

A process for producing a catalyst body includes providing titanium dioxide, tungsten trioxide, vanadium pentoxide, aluminum oxide, and/or silicon oxide for the catalyst body. A kneadable and/or shapable compound is processed to form a shaped body by extrusion or by coating of a support body. The shaped body is dried and is calcined to form an active compound. The calcined shaped body is artificially aged by a final heat treatment at a temperature higher than the calcination temperature to produce a catalyst body having a high resistance to deactivation at high temperatures. The starting materials include from 65 to 95% by weight of titanium dioxide, 2 to 30% by weight of tungsten trioxide, 0 to 2% by weight of vanadium pentoxide, preferably, less than 1.5%, 0.1 to 10% by weight of aluminum oxide, and 0.1 to 10% by weight of silicon dioxide. The final heat treatment is done is at 660 to 700° C., drying is at 20 to 100° C. prior to calcination, and calcination is at 400° C. to less than 700° C.

대표청구항 ▼

1. A process for producing a catalyst body, which comprises: producing a compound from starting materials including tungsten trioxide, vanadium pentoxide, titanium dioxide, aluminum oxide, and silicon oxide; processing the compound into a shaped body by extrusion of or coating of a support body;

1. A process for producing a catalyst body, which comprises: producing a compound from starting materials including tungsten trioxide, vanadium pentoxide, titanium dioxide, aluminum oxide, and silicon oxide; processing the compound into a shaped body by extrusion of or coating of a support body; forming an active compound from the compound by calcinating the shaped body at a calcination temperature; and aging the calcined shaped body by a final heat treatment at a temperature, higher than the calcination temperature, of from 620 to 720° C. for a total duration of from 20 to 80 hours. 2. The process according to claim 1, wherein the compound is kneadable. 3. The process according to claim 1, wherein the compound is shapable. 4. The process according to claim 1, which further comprises carrying out the aging step by performing the final heat treatment at a temperature of from 660 to 700° C. 5. The process according to claim 1, which further comprises drying the shaped body at a temperature of from 20 to 100° C. prior to the calcination. 6. The process according to claim 1, which further comprises carrying out the forming step by calcinating the shaped body at a temperature of from 400° C. to less than 700° C. 7. The process according to claim 1, which further comprises carrying out the producing step by providing starting materials including from 65 to 95% by weight of titanium dioxide, 2 to 30% by weight of tungsten trioxide, 0 to 2% by weight of vanadium pentoxide, 0.1 to 10% by weight of aluminum oxide, and 0.1 to 10% by weight of silicon dioxide. 8. The process according to claim 7, which further comprises carrying out the producing step by providing starting materials including less than 1.5% by weight of vanadium pentoxide. 9. The process according to claim 1, which further comprises selecting the starting materials to produce the shaped body having from 65 to 95% by weight of titanium dioxide, 2 to 30% by weight of tungsten trioxide, 0 to 2% by weight of vanadium pentoxide, 0.1 to 10% by weight of aluminum oxide, and 0.1 to 10% by weight of silicon dioxide. 10. The process according to claim 9, which further comprises selecting the starting materials to produce the shaped body having less than 1.5% by weight vanadium pentoxide.