High-activity hydrofining catalyst and its preparation method
A technology of hydrofining and catalyst, which is applied in the fields of refined hydrocarbon oil and petroleum industry, etc. It can solve the problems of poor hydrothermal stability, weak acidity of mesoporous molecular sieves, and limited application range, etc.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
example 1
[0021] This example uses MCM-41 as a representative example of a medium-pore molecular sieve and NaY zeolite as a representative example of a micro-pore molecular sieve to describe the synthesis method of MCM-41-Y composite molecular sieve. Weigh 5 g of NaY zeolite and exchange it with 100 ml of 25% cetyltrimethylammonium bromide aqueous solution at room temperature for 24 hours. Add measured amount of sodium metasilicate into deionized water, heat to dissolve, adjust pH value to 10.5 with sulfuric acid, and stir at room temperature for 0.5 hour. A measured amount of template agent cetyltrimethylammonium bromide was dissolved in deionized water, mixed with the suspension containing NaY, then added to the above sodium metasilicate solution, and stirred at room temperature for 2 hours. The mass composition of the mixture is: SiO 2 :CTAB:H 2 O=1:0.2:60, the mass ratio of NaY to the mixture is: 1:120. The prepared mixture was put into a stainless steel pressure autoclave, and p...
example 2
[0023] This example is the preparation method of the Ni-Mo hydrorefining catalyst supported by the composite molecular sieve.
[0024] The loading of catalyst active components adopts vacuum co-impregnation method. Weigh the composite molecular sieve prepared in Example 1, and add the prepared metal salt solution dropwise into the composite molecular sieve under vacuum (1kPa~5kPa). Dipping at room temperature for 1 hour. The water was quickly evaporated to dryness, dried at 120°C for 12 hours, and then calcined in air at 450°C for 5 hours to obtain a Ni-Mo catalyst precursor supported by a composite molecular sieve. MoO 3 The supported amount was 20% by mass, and the supported amount of NiO was 7.8 wt% (mass).
example 3
[0026] This example is the evaluation method and result of the hydrodesulfurization activity of the catalyst of the present invention.
[0027] The hydrodesulfurization reaction is carried out on a stainless steel high-pressure fixed-bed device. The starting material was a decahydronaphthalene solution containing 0.8% by weight of dibenzothiophene. Evaluation conditions: reaction temperature is 300°C; total pressure is 5MPa; H 2 The ratio of solid to liquid is 1600Nm 3 / m 3 ;The liquid space velocity is 27h -1 . The raw materials and products were analyzed by Agilent 6890 gas chromatography, and the activity was expressed by the conversion rate of dibenzothiophene.
[0028] Under the reaction conditions, the conversion rate of dibenzothiophene is greater than 99%, indicating that the catalyst has very high low-temperature hydrodesulfurization reaction activity. The hydrocracking performance of the catalyst is represented by the selectivity of low molecular weight (benzen...
PUM
| Property | Measurement | Unit |
|---|---|---|
| pore size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More