Preparation method for after-treatment hydrocracking catalyst
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A hydrocracking and catalyst technology, which is applied in the field of catalysis, can solve the problem that the active metal cannot reach a high accumulation layer, and achieve the effects of high selectivity, high hydrogenation activity, and high hydrogenation selectivity
Active Publication Date: 2015-12-30
CHINA NAT OFFSHORE OIL CORP +2
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Problems solved by technology
This method is mainly to achieve uniform dispersion of active metals, but uniformly dispersed active metals cannot achieve a high number of stacked layers, which is quite different from the formation of highly active hydrogenation active centers
Method used
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Embodiment 1
[0030] (1) Carrier preparation
[0031] The method is the same as the preparation method in Comparative Example 1.
[0032] (2) Catalyst preparation
[0033] Take 10g of nickel nitrate and 29g of ammonium metatungstate, dissolve them in 70ml of aqueous solution, and then use the equal volume dipping method to immerse the W-Ni co-dipping solution on 80g of carrier A for 2 hours, dry at 110 °C for 6 hours, and bake at 350 °C for 2 hours. hours, the catalyst catC was prepared.
[0034] (3) Catalyst post-treatment
[0035] Dissolve 2g of tartaric acid in 15ml of water, then dilute to 70ml, and impregnate it onto 110g of catalyst catC by the equal volume dipping method, dry in the shade after 2 hours, dry at 100°C for 2 hours, and calcinate at 250°C for 2 hours to obtain catD.
Embodiment 2
[0037] (1) Carrier preparation
[0038] The method is the same as the preparation method in Comparative Example 1.
[0039] (2) Catalyst preparation
[0040] The method is the same as the preparation method in Example 1
[0041] (3) Catalyst post-treatment
[0042] Dissolve 20g of tartaric acid in 15ml of water, then dilute to 70ml, and impregnate it onto 110g of catalyst catC by the equal volume dipping method, dry in the shade after 2 hours, dry at 100°C for 2 hours, and calcinate at 250°C for 2 hours to obtain catE.
Embodiment 3
[0044] (1) Carrier preparation
[0045] The method is the same as the preparation method in Comparative Example 1.
[0046] (2) Catalyst preparation
[0047] The method is the same as the preparation method in Example 1
[0048] (3) Catalyst post-treatment
[0049] Dissolve 60g of tartaric acid in 15ml of water, then dilute to 70ml, and impregnate it on 110g of catalyst catC by the equal volume dipping method, dry in the shade after 2 hours, dry at 100°C for 2 hours, and calcinate at 250°C for 2 hours to obtain catF.
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Abstract
The invention discloses a preparation method for an after-treatment hydrocracking catalyst. The method includes the steps that 1, a hydrocracking catalyst carrier is prepared; 2, the catalyst carrier is steeped in steeping liquid containing active metal components and then dried and calcined at low temperature; 3, after matter capable of changing the arrangement of active metals is dissolved in a solvent according to a certain proportion, the catalyst obtained from the step 2 is steeped in the mixture; 4, materials obtained from the step 3 are dried and calcined for 1-10 hours at the low temperature of 150-400 DEG C, and the final after-treatment hydrocracking catalyst is obtained. The matter capable of changing the arrangement of the active metals is one or more of a phosphoric acid complexing agent, an alcohol amine complexing agent, an aminocarboxylic acid complexing agent, a hydroxy carboxylic acid complexing agent, an organic phosphonic acid complexing agent and a polyacrylic acid complexing agent. The after-treatment hydrocracking catalyst prepared through the method is higher in hydrogenation activity and hydrogenation selectivity, higher in selectivity for middle distillate, and suitable for treating the hydrocracking catalysts composed of various different metals.
Description
technical field [0001] The invention relates to the technical field of catalysis, in particular to a method for preparing a post-treatment type hydrocracking catalyst, in particular to processing high aromatic and heavy hydrocarbon raw materials, and can adjust the distribution of hydrogenation active components in the hydrocracking catalyst and Existing forms, in turn, methods for increasing the activity of hydrocracking catalysts. Background technique [0002] As the main solution to solve the problem of poor crude oil quality and relieve environmental pressure, hydrocracking technology has been paid more and more attention by refining and chemical enterprises. The core of hydrocracking is the hydrocracking catalyst, and the hydrocracking catalyst is a bifunctional catalyst that contains both an acidic component and a hydrogenation component. The hydrogenation activity is generally provided by metals from Group VIB and Group VIII in the periodic table; while the source of...
Claims
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