A kind of method that propane dehydrogenation prepares propylene
A technology of propane dehydrogenation and propylene is applied in the field of propane dehydrogenation to propylene, which can solve the problems of low propane conversion rate and propylene selectivity, and achieve the effect of improving the propane conversion rate and propylene selectivity.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0015] In the present invention, the dehydrogenation catalyst can be prepared according to conventional methods in the art. In one embodiment, the preparation method of the dehydrogenation catalyst may include:
[0016] (1) Carriers are loaded with soluble salts of platinum group metals and bismuth by an impregnation method, and then dried and roasted to obtain a dehydrogenation catalyst precursor;
[0017] (2) Reducing the dehydrogenation catalyst precursor obtained in step (1) to obtain a dehydrogenation catalyst.
[0018] In the above step (1), the specific operation mode of the impregnation method is to immerse the carrier in a mixed solution containing platinum group metals and soluble bismuth salts, so as to load the platinum group metals and bismuth soluble salts on the carrier. The soluble salt of the platinum group metal may be selected from at least one of chloroplatinic acid, ammonium hexachloroplatinate and ammonium tetrachloroplatinate. The soluble salt of bismu...
Embodiment 1
[0026] This example is used to illustrate the method for preparing propylene from propane dehydrogenation provided by the present invention.
[0027] (1) Preparation of dehydrogenation catalyst
[0028] 60g γ-Al 2 o 3 (Shandong Aluminum) impregnated in 0.03mol / L H at 75°C 2 PtCl 6 (Sinopharm Group Chemical Reagent Co., Ltd.) and 0.1mol / L bismuth nitrate (provided by Beijing Zhonglian Chemical Factory) aqueous solution, immersed for 0.5h, wherein the volume of the solution was measured according to the mass content of the catalyst component, at 75 ° C After drying by rotary evaporation for 0.5 h, the material was placed in a muffle furnace and calcined in an air atmosphere at 600° C. for 3 h to obtain a catalyst precursor. The catalyst precursor was reduced in a hydrogen atmosphere at 590° C. for 3 h to obtain dehydrogenation catalyst A1.
[0029] The composition of the dehydrogenation catalyst A1 is: based on the total mass of the dehydrogenation catalyst A1, the mass con...
Embodiment 2
[0033] This example is used to illustrate the method for preparing propylene from propane dehydrogenation provided by the present invention.
[0034] The method is the same as the method used in Example 1, except that the dehydrogenation catalyst A2 is used, wherein, based on the total mass of the dehydrogenation catalyst A2, the mass content of platinum is 0.5%, and the mass content of bismuth is 0.5%; In the bed reactor, the volume space velocity of the propane feed is controlled to be 600h -1 , The reactor inlet temperature was 590 °C.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More