Method for preparing hydro-demetalization catalyst for heavy oil

Abstract

The invention discloses a method for preparing a hydro-demetalization catalyst for heavy oil. The method comprises the following steps of: firstly, preparing an alumina carrier, then, loading active metal components by using an immersion method, and obtaining the final hydro-demetalization catalyst after drying and roasting, wherein the process for preparing the alumina carrier comprises the following steps of: (1) evenly mixing pseudoboehmite dry colloidal powder with an extrusion aid, and then, adding an aqueous solution in which a physical pore-expanding agent and a chemical pore-expandingagent are dissolved, wherein the physical pore-expanding agent is a carbohydrate, and the chemical pore-expanding agent is phosphoric acid, phosphate or borate; (2) evenly mixing the materials prepared in the step (1), and then, forming; and (3) drying and roasting the materials prepared in the step (2) so as to prepare the alumina carrier. The hydro-demetalization catalyst for the heavy oil, prepared by the method disclosed by the invention, has the advantages of larger pore volume, larger pore diameter, concentrated pore distribution, good mechanical strength, and higher activity and higheractivity stability in the process of the hydro-demetalization for the heavy oil.

Description

technical field

[0001] The invention relates to a preparation method of a heavy oil hydrogenation demetallization catalyst. Background technique

[0002] With the continuous reduction of oil resources and the increasing trend of heavy and inferior crude oil, heavy oil deep processing technology has been highly valued by refiners at home and abroad. Hydrodemetallization catalysts used for heavy oil, especially vacuum residue with high metal content, are prone to rapid decline and deactivation of catalyst activity due to the deposition of metal impurities such as nickel and vanadium. Catalysts with larger pore volume and larger pore diameter have strong metal and carbon capacity, which can slow down the deactivation of the catalyst and prolong the operation period of the catalyst. The pore structure of the catalyst is determined by the carrier that constitutes the catalyst. Therefore, the preparation of a carrier with a larger pore volume and larger pore diameter is an import...

Examples

example 1

[0028]Get pseudo-boehmite dry rubber powder (produced by Shenyang Catalyst Factory, alumina dry basis weight content 65%), every 100g of pseudo-boehmite dry rubber powder is added with 2 g of squid powder, and mix evenly; For diaspore dry rubber powder, dissolve 3g of glucose and 1.5g of phosphoric acid in 80mL of distilled water, and mix the resulting solution with the above materials evenly. Extrude into a clover-shaped strip with a diameter of 1.8mm on a screw extruder, dry it at 120°C for 3 hours, bake the dried molding at a temperature of 450°C for 2 hours, and then bake it at a temperature of 650°C for 3 hours , to obtain the alumina carrier B1 provided by the present invention.

example 2

[0030] Same as Example 1, except that glucose is changed to sucrose, the addition amount is 5g per 100g of pseudo-boehmite dry rubber powder, and the addition of phosphoric acid is 1.0g per 100g of pseudo-boehmite dry rubber powder. Calcined at a temperature of 1.5 hours, and then calcined at a temperature of 700° C. for 2 hours to obtain the alumina carrier B2 provided by the present invention.

example 3

[0032] Same as Example 1, except that the addition of glucose is 6g per 100g of pseudo-boehmite dry rubber powder, the addition of phosphoric acid is 0.8g per 100g of pseudo-boehmite dry rubber powder, and the molding is roasted at a temperature of 500°C for 1.5 hours, and then calcined at a temperature of 650° C. for 2.5 hours to obtain the alumina carrier B3 provided by the present invention.

technical field

[0001] The invention relates to a preparation method of a heavy oil hydrogenation demetallization catalyst. Background technique

[0002] With the continuous reduction of oil resources and the increasing trend of heavy and inferior crude oil, heavy oil deep processing technology has been highly valued by refiners at home and abroad. Hydrodemetallization catalysts used for heavy oil, especially vacuum residue with high metal content, are prone to rapid decline and deactivation of catalyst activity due to the deposition of metal impurities such as nickel and vanadium. Catalysts with larger pore volume and larger pore diameter have strong metal and carbon capacity, which can slow down the deactivation of the catalyst and prolong the operation period of the catalyst. The pore structure of the catalyst is determined by the carrier that constitutes the catalyst. Therefore, the preparation of a carrier with a larger pore volume and larger pore diameter is an import...

Examples

example 1

[0028]Get pseudo-boehmite dry rubber powder (produced by Shenyang Catalyst Factory, alumina dry basis weight content 65%), every 100g of pseudo-boehmite dry rubber powder is added with 2 g of squid powder, and mix evenly; For diaspore dry rubber powder, dissolve 3g of glucose and 1.5g of phosphoric acid in 80mL of distilled water, and mix the resulting solution with the above materials evenly. Extrude into a clover-shaped strip with a diameter of 1.8mm on a screw extruder, dry it at 120°C for 3 hours, bake the dried molding at a temperature of 450°C for 2 hours, and then bake it at a temperature of 650°C for 3 hours , to obtain the alumina carrier B1 provided by the present invention.

example 2

[0030] Same as Example 1, except that glucose is changed to sucrose, the addition amount is 5g per 100g of pseudo-boehmite dry rubber powder, and the addition of phosphoric acid is 1.0g per 100g of pseudo-boehmite dry rubber powder. Calcined at a temperature of 1.5 hours, and then calcined at a temperature of 700° C. for 2 hours to obtain the alumina carrier B2 provided by the present invention.

example 3

[0032] Same as Example 1, except that the addition of glucose is 6g per 100g of pseudo-boehmite dry rubber powder, the addition of phosphoric acid is 0.8g per 100g of pseudo-boehmite dry rubber powder, and the molding is roasted at a temperature of 500°C for 1.5 hours, and then calcined at a temperature of 650° C. for 2.5 hours to obtain the alumina carrier B3 provided by the present invention.

Images