Continuous Reforming Catalyst with Large Pore and High Bulk Density and Its Preparation and Application

Abstract

The invention relates to a continuous reforming catalyst with large pore diameter and high bulk density and its preparation and application. In terms of elements, the catalyst includes the following components in mass percentages: 0.01-1.0 mass % of Group VIII metals and 0.01-1.0 mass % of Group IVA metals mass %, halogen 0.2-3.0 mass %; VIII group metal is platinum, IVA group metal is germanium or tin; the bulk density of the catalyst is 0.58-0.90 g / ml, the most probable pore diameter is 8-20 nanometers, and the specific surface area is 170-210 meters 2 / g; the catalyst is applied in the continuous reforming process and has high activity, high xylene yield and low coke yield.

Description

technical field

[0001] The invention relates to a continuous reforming catalyst with large aperture and high bulk density and its preparation and application. Background technique

[0002] Catalytic reforming is one of the important production processes in petroleum processing, and its main purpose is to produce high-octane gasoline, BTX aromatics and cheap hydrogen. With the upgrading of gasoline and diesel quality and the rapid development of hydrogenation technology, catalytic reforming plays an increasingly important role in the refining and chemical industry.

[0003] For refinery continuous reforming unit capacity expansion, the furnace load is usually increased, but the reactor is less modified. At present, radial reactors are generally used in continuous reforming units. After the capacity of the unit is expanded, the oil and gas processing capacity will increase. For reforming catalysts with low bulk density, under the pressure of oil and gas, part of the catalyst ...

Examples

Embodiment 1

[0041] Get 1000 grams of pseudo-boehmite (produced by Sasol Company, , the total amount of aluminum oxide is 76m%) and 1.4 liters of deionized water, stirred and slurried at room temperature for 0.5 hours. Then add 60 ml (1:1 volume) of nitric acid, a predetermined amount of stannous chloride in hydrochloric acid solution, and acidify for 2 hours. Then drop the ball into the oil ammonia column, wherein the oil column is aviation kerosene, and the wet ball is solidified in the ammonia water column for 2 hours, then filtered, washed with deionized water three times, dried at 60°C for 6 hours, and dried at 120°C for 2 hours. Calcined at 500°C for 4 hours in a flowing air atmosphere. The properties of the prepared carrier No. 1 are shown in Table 1.

Embodiment 2

[0043] Dissolve 98 grams of aluminum nitrate nonahydrate in 200 milliliters of water, add 3.4 milliliters of stannous chloride hydrochloric acid solution (the solubility of tin is 12 mg / ml) after the dissolution is transparent, stir evenly and impregnate 200 grams of No. 1 carrier for 5 hours , under vacuum conditions, evaporate the impregnation solution at 60°C, dry at 120°C for 4 hours, and then bake at 450°C for 4 hours. Carrier No. 2 was prepared, and its physical properties are listed in Table 1.

Embodiment 3

[0045] No. 3 carrier was prepared according to the method of Example 2, except that 180 grams of aluminum nitrate nonahydrate was dissolved in 300 milliliters of water, and after the dissolution was transparent, 6.4 milliliters of tin protochloride hydrochloric acid solution (tin solubility was 12 mg / ml) was added. The physical properties of No. 3 carrier are listed in Table 1, and its pore size distribution is as follows figure 1 shown.

technical field

[0001] The invention relates to a continuous reforming catalyst with large aperture and high bulk density and its preparation and application. Background technique

[0002] Catalytic reforming is one of the important production processes in petroleum processing, and its main purpose is to produce high-octane gasoline, BTX aromatics and cheap hydrogen. With the upgrading of gasoline and diesel quality and the rapid development of hydrogenation technology, catalytic reforming plays an increasingly important role in the refining and chemical industry.

[0003] For refinery continuous reforming unit capacity expansion, the furnace load is usually increased, but the reactor is less modified. At present, radial reactors are generally used in continuous reforming units. After the capacity of the unit is expanded, the oil and gas processing capacity will increase. For reforming catalysts with low bulk density, under the pressure of oil and gas, part of the catalyst ...

Examples

Embodiment 1

[0041] Get 1000 grams of pseudo-boehmite (produced by Sasol Company, , the total amount of aluminum oxide is 76m%) and 1.4 liters of deionized water, stirred and slurried at room temperature for 0.5 hours. Then add 60 ml (1:1 volume) of nitric acid, a predetermined amount of stannous chloride in hydrochloric acid solution, and acidify for 2 hours. Then drop the ball into the oil ammonia column, wherein the oil column is aviation kerosene, and the wet ball is solidified in the ammonia water column for 2 hours, then filtered, washed with deionized water three times, dried at 60°C for 6 hours, and dried at 120°C for 2 hours. Calcined at 500°C for 4 hours in a flowing air atmosphere. The properties of the prepared carrier No. 1 are shown in Table 1.

Embodiment 2

[0043] Dissolve 98 grams of aluminum nitrate nonahydrate in 200 milliliters of water, add 3.4 milliliters of stannous chloride hydrochloric acid solution (the solubility of tin is 12 mg / ml) after the dissolution is transparent, stir evenly and impregnate 200 grams of No. 1 carrier for 5 hours , under vacuum conditions, evaporate the impregnation solution at 60°C, dry at 120°C for 4 hours, and then bake at 450°C for 4 hours. Carrier No. 2 was prepared, and its physical properties are listed in Table 1.

Embodiment 3

[0045] No. 3 carrier was prepared according to the method of Example 2, except that 180 grams of aluminum nitrate nonahydrate was dissolved in 300 milliliters of water, and after the dissolution was transparent, 6.4 milliliters of tin protochloride hydrochloric acid solution (tin solubility was 12 mg / ml) was added. The physical properties of No. 3 carrier are listed in Table 1, and its pore size distribution is as follows figure 1 shown.

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