Hydrofining catalyst and preparation method thereof

Abstract

The invention provides a hydrofining catalyst and a preparation method thereof. The catalyst comprises an aluminum oxide carrier which is modified by an assistant and VIII group and VIB group metal oxides which are loaded on the carrier, wherein, the assistant is at least one of boron, phosphorus, silicon and titanium compounds. The catalyst is prepared by an immersion method which is characterized in that an organic stabilizer is added into immersion fluid; the number of metal active centers of the catalyst is increased with the addition of the organic stabilizer; the physicochemical properties of the catalyst is improved by the way the aluminium oxide is modified by the assistant; therefore, the hydrofining catalyst prepared by the method in the invention has high desulfuration and denitrification activity, and is applicable to the hydrotreating process of various distillate oil, in particular to poor quality diesel oil.

Description

technical field

[0001] The invention relates to a hydrorefining catalyst and a preparation method thereof, belonging to the technical field of petrochemical and petroleum refining catalysts. Background technique

[0002] Hydrofining is one of the important processes in petroleum processing. It mainly removes harmful impurities in oil products, such as sulfur, nitrogen, oxygen and other organic compounds, through catalytic hydrogenation, so that oil products can better meet the requirements of deep processing and achieve rational utilization of resources.

[0003] The research and development of hydrotreating catalysts develops almost simultaneously with the petroleum industry, and there are various brands of catalysts used in industrial production both at home and abroad. At present, there are two main aspects of research on hydrorefining catalysts, (1) focusing on the selection of carriers, including adding additives and improving preparation methods; Less production proc...

Examples

Embodiment 1

[0021] Preparation of Hydrofining Catalyst C1

[0022] (i) Mix 100g pseudo-boehmite, 20g SB powder and 5g turnip powder to form a dry powder; dissolve 3g boric acid with 20ml water, then add 2g phosphoric acid (85%) and 2% 80ml nitric acid aqueous solution to form a stable acid solution, adding the acid solution to the dry powder, kneading twice, extrusion molding, putting the molded product in a drying oven at 130°C for 3 hours, and then roasting at 580°C for 5 hours to obtain the modified γ-Al 2 o 3 Carrier Z1.

[0023] (ii) Add 10g sorbitol in 120ml deionized water, add 18.2g ammonium tetramolybdate (containing molybdenum oxide 85.0%), 31.5g ammonium metatungstate (containing tungsten oxide 80.6%), 26g nickel nitrate after dissolving, stir Dissolve, filter, and supplement with deionized water to obtain 120ml of stable co-immersion solution.

[0024] (iii) Take 100g of carrier Z1, saturately impregnate it in the above co-immersion solution at room temperature, let the im...

Embodiment 2

[0027] Preparation of Hydrofining Catalyst C2

[0028] (i) 100g pseudo-boehmite, 5g silica sol, 3g boric acid, 20ml titanium trichloride aqueous solution of 25%, 2% 80ml nitric acid aqueous solution and 5g scallop powder are mixed, kneaded twice, extrusion molding, The molded product is put into a drying oven and dried at 140°C for 3 hours, and then fired at 600°C for 6 hours to obtain the modified γ-Al 2 o 3 Carrier Z2.

[0029] (ii) Add 10g sorbitol in 120ml deionized water, add 18.2g ammonium tetramolybdate (containing molybdenum oxide 85.0%), 31.5g ammonium metatungstate (containing tungsten oxide 80.6%), 26g nickel nitrate after dissolving, stir Dissolve, filter, and supplement with deionized water to obtain 120ml of stable co-immersion solution.

[0030] (iii) Take 100g of carrier Z2, saturately impregnate it in the above co-immersion solution at room temperature, let the impregnated carrier stand at room temperature for 24 hours, then dry at 130°C for 2 hours, keep t...

Embodiment 3

[0032] Preparation of Hydrofining Catalyst C3

[0033] (i) Mix 100g pseudo-boehmite, 20g SB powder and 5g turnip powder to form a dry powder; dissolve 3g boric acid with 20ml water, then add 2g phosphoric acid (85%) and 2% 80ml nitric acid aqueous solution to form a stable acid solution, adding the acid solution to the dry powder, kneading twice, extrusion molding, putting the molded product in a drying oven at 130°C for 3 hours, and then roasting at 580°C for 5 hours to obtain the modified γ-Al 2 o 3 Carrier Z3.

[0034] (ii) Add 18.2g ammonium tetramolybdate (containing molybdenum oxide 85.0%) and 31.5g ammonium metatungstate (containing tungsten oxide 80.6%) in 100ml deionized water, stir and dissolve; add 28g nickel nitrate, 8g of urea and 4g of phosphoric acid (85%) were stirred and dissolved, and the two solutions were mixed, filtered, and supplemented with deionized water to obtain 120ml of a stable co-immersion solution.

[0035] (iii) Take 100g of carrier Z3, satu...

technical field

[0001] The invention relates to a hydrorefining catalyst and a preparation method thereof, belonging to the technical field of petrochemical and petroleum refining catalysts. Background technique

[0002] Hydrofining is one of the important processes in petroleum processing. It mainly removes harmful impurities in oil products, such as sulfur, nitrogen, oxygen and other organic compounds, through catalytic hydrogenation, so that oil products can better meet the requirements of deep processing and achieve rational utilization of resources.

[0003] The research and development of hydrotreating catalysts develops almost simultaneously with the petroleum industry, and there are various brands of catalysts used in industrial production both at home and abroad. At present, there are two main aspects of research on hydrorefining catalysts, (1) focusing on the selection of carriers, including adding additives and improving preparation methods; Less production proc...

Examples

Embodiment 1

[0021] Preparation of Hydrofining Catalyst C1

[0022] (i) Mix 100g pseudo-boehmite, 20g SB powder and 5g turnip powder to form a dry powder; dissolve 3g boric acid with 20ml water, then add 2g phosphoric acid (85%) and 2% 80ml nitric acid aqueous solution to form a stable acid solution, adding the acid solution to the dry powder, kneading twice, extrusion molding, putting the molded product in a drying oven at 130°C for 3 hours, and then roasting at 580°C for 5 hours to obtain the modified γ-Al 2 o 3 Carrier Z1.

[0023] (ii) Add 10g sorbitol in 120ml deionized water, add 18.2g ammonium tetramolybdate (containing molybdenum oxide 85.0%), 31.5g ammonium metatungstate (containing tungsten oxide 80.6%), 26g nickel nitrate after dissolving, stir Dissolve, filter, and supplement with deionized water to obtain 120ml of stable co-immersion solution.

[0024] (iii) Take 100g of carrier Z1, saturately impregnate it in the above co-immersion solution at room temperature, let the im...

Embodiment 2

[0027] Preparation of Hydrofining Catalyst C2

[0028] (i) 100g pseudo-boehmite, 5g silica sol, 3g boric acid, 20ml titanium trichloride aqueous solution of 25%, 2% 80ml nitric acid aqueous solution and 5g scallop powder are mixed, kneaded twice, extrusion molding, The molded product is put into a drying oven and dried at 140°C for 3 hours, and then fired at 600°C for 6 hours to obtain the modified γ-Al 2 o 3 Carrier Z2.

[0029] (ii) Add 10g sorbitol in 120ml deionized water, add 18.2g ammonium tetramolybdate (containing molybdenum oxide 85.0%), 31.5g ammonium metatungstate (containing tungsten oxide 80.6%), 26g nickel nitrate after dissolving, stir Dissolve, filter, and supplement with deionized water to obtain 120ml of stable co-immersion solution.

[0030] (iii) Take 100g of carrier Z2, saturately impregnate it in the above co-immersion solution at room temperature, let the impregnated carrier stand at room temperature for 24 hours, then dry at 130°C for 2 hours, keep t...

Embodiment 3

[0032] Preparation of Hydrofining Catalyst C3

[0033] (i) Mix 100g pseudo-boehmite, 20g SB powder and 5g turnip powder to form a dry powder; dissolve 3g boric acid with 20ml water, then add 2g phosphoric acid (85%) and 2% 80ml nitric acid aqueous solution to form a stable acid solution, adding the acid solution to the dry powder, kneading twice, extrusion molding, putting the molded product in a drying oven at 130°C for 3 hours, and then roasting at 580°C for 5 hours to obtain the modified γ-Al 2 o 3 Carrier Z3.

[0034] (ii) Add 18.2g ammonium tetramolybdate (containing molybdenum oxide 85.0%) and 31.5g ammonium metatungstate (containing tungsten oxide 80.6%) in 100ml deionized water, stir and dissolve; add 28g nickel nitrate, 8g of urea and 4g of phosphoric acid (85%) were stirred and dissolved, and the two solutions were mixed, filtered, and supplemented with deionized water to obtain 120ml of a stable co-immersion solution.

[0035] (iii) Take 100g of carrier Z3, satu...