Semi-regenerated reforming catalyst and preparation method thereof
A reforming catalyst and semi-regeneration technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of easy aggregation of metal components, weak adsorption of metal compounds, etc. Strong interaction, less methane effect
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[0030] A kind of preparation method of semi-regenerated reforming catalyst, it is the preparation method of above-mentioned semi-regenerated reforming catalyst, comprises the steps:
[0031] Step 1, preparing a strip-shaped alumina carrier, the alumina being γ-alumina prepared from aluminum hydroxide obtained by hydrolysis of alkoxy aluminum;
[0032] Step 2, preparing an impregnating solution, which contains a platinum compound, a rhenium compound, a competitive adsorbent and an ammonium salt;
[0033] Step 3, impregnating the alumina carrier, and then drying;
[0034] Step 4, catalyst activation to obtain catalyst oxidation state precursor; and
[0035] Step 5, reducing and presulfiding the catalyst oxidation state precursor
[0036] In the preparation method of the semi-regenerative reforming catalyst of the present invention, in step 1, the carrier is preferably γ-alumina, more preferably γ-alumina prepared from high-purity aluminum hydroxide obtained by hydrolysis of al...
Embodiment 1
[0053] Get 300 grams of pseudo-boehmite powder (manufactured by Sasol Company), and 6 grams of fennel powder, and mix them evenly. Get 4 grams of nitric acid with a concentration of 65% by mass, 7 grams of acetic acid with a concentration of 36% by mass, and 210 grams of deionized water after mixing to form a peptizer, pour the peptizer into the mixed pseudoboehmite powder, and knead To be suitable for extruding, after extruding, dry at 60°C for 6 hours, dry at 120°C for 2 hours, and bake at 650°C for 4 hours in a flowing air atmosphere to obtain a strip-shaped γ-alumina carrier.
[0054] Prepare an impregnation solution containing chloroplatinic acid, perrhenic acid, hydrochloric acid, and tetramethylammonium bromide according to a predetermined amount, and the platinum content, rhenium content, HCl content and ammonium salt content in the impregnation solution are respectively 0.26% relative to the mass of dry alumina , 0.46%, 1.5% and 4.8%. Take the impregnating liquid to ...
Embodiment 2
[0056] Catalyst B was prepared according to the method of Example 1, except that the platinum content, rhenium content, HCl content and ammonium salt content in the impregnation solution were 0.22%, 0.21%, 2.1% and 2.5% relative to the mass of alumina on a dry basis, respectively. Specifically:
[0057] Get 300 grams of pseudo-boehmite powder (manufactured by Sasol Company), and 6 grams of fennel powder, and mix them evenly. Get 4 grams of nitric acid with a concentration of 65% by mass, 7 grams of acetic acid with a concentration of 36% by mass, and 210 grams of deionized water after mixing to form a peptizer, pour the peptizer into the mixed pseudoboehmite powder, and knead To be suitable for extruding, after extruding, dry at 60°C for 6 hours, dry at 120°C for 2 hours, and bake at 650°C for 4 hours in a flowing air atmosphere to obtain a strip-shaped γ-alumina carrier.
[0058] Prepare an impregnation solution containing chloroplatinic acid, perrhenic acid, hydrochloric ac...
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