Catalytic cracking catalyst, preparation method thereof and application

Abstract

The invention discloses a catalytic cracking catalyst, a preparation method thereof and application. The catalytic cracking catalyst comprises cracking active components, clay and a binder, wherein the cracking active components include, by weight, a first Y-type molecular sieve 35-70%, a second Y-type molecular sieve 20-60% and a third Y-type molecular sieve 2-20%, and the binder is a modified alumina sol containing Cl and Si. The content of Al is 8-13 wt%, the content of Cl is 4-9 wt%, and the content of Si is 0.1-1 wt% based on the total weight of the modified alumina sol. The weight ratio of Al to Cl is 1.2-2.2:1, and the pH of the modified alumina sol is in a range of 2.2 to 5.2. The catalytic cracking catalyst has low coke selectivity and high catalytic cracking activity in heavy oil catalytic cracking process, and can obtain high yield of diesel oil.

Description

Technical field

[0001] The invention relates to a catalytic cracking catalyst, a preparation method of the catalytic cracking catalyst, and the application of the catalytic cracking catalyst in the catalytic cracking of heavy oil. Background technique

[0002] Catalytic cracking (FCC) is an important secondary processing process for crude oil, and it occupies a pivotal position in the refining industry. In the catalytic cracking process, heavy distillates (such as vacuum distillate or residual oil with heavier components) react in the presence of a catalyst and are converted into high value-added products such as liquefied petroleum gas, gasoline, and diesel. This process usually requires Use catalytic materials with high cracking activity. Microporous zeolite catalytic materials are widely used in petroleum refining and processing industries due to their excellent shape-selective catalytic performance and high cracking reaction activity. At present, catalytic cracking catalyst...

Examples

preparation example Construction

[0023] In the preparation process of the above-mentioned modified aluminum sol, water can be introduced into the reactor by a soluble silicon-containing compound solution, a chloride solution, a soluble phosphorus-containing compound solution, by adding water such as deionized water, or a combination of the above methods. Water is introduced into the reactor. Preferably, the weight ratio of the water introduced into the reactor before adding chloride to the soluble silicon-containing compound (calculated as Si element) introduced into the reactor before adding chloride is 100:0.1- 10, for example, 100:1-10 or 100:0.1-5 or 100:0.15-1.4 or 100:0.2-1.3:1.

[0024] The content of silicon (calculated as silicon element) in the modified aluminum sol obtained in the present invention is 0.1-1% by weight, preferably 0.2-0.9% by weight, for example, 0.3-0.85% by weight.

[0025] In the preparation process of the above modified aluminum sol, the added amount of the metallic aluminum (calcula...

preparation example

[0069] In the following preparation examples, comparative preparation examples, examples and comparative examples:

[0070] The purity of aluminum chips used is 99.2% by weight, and the purity of aluminum particles is 98.8% by weight; the 1:1 chemically pure hydrochloric acid used is a mixture of 1 volume of 36% by weight chemically pure hydrochloric acid and 1 volume of water; the 1:1 chemically pure phosphoric acid used It is a mixture of 1 volume of chemically pure phosphoric acid with a concentration of 85% by weight and 1 volume of water; the rare earth chloride is purchased from Baotou Steel Rare Earth High-tech Co., Ltd., and the rare earth elements are La and Ce.

[0071] The specific surface area, pore volume and average pore diameter are all measured by the low-temperature nitrogen adsorption-desorption method. The instrument used is the Physicochemical Adsorption Analyzer ASAP2400 from Micromeritics, USA; Na 2 O, Al 2 O 3 , SiO 2 , P 2 O 5 The content of X-ray fluorescenc...

preparation example 1

[0076] This preparation example is used to illustrate the preparation method of the silicon modified aluminum sol provided by the present invention.

[0077] 286 grams of aluminum chips (calculated as Al), 1481 grams of deionized water, and 119 grams of water glass aqueous solution (containing 9.33% by weight of Si elements and 4.63% by weight of Na elements) were put into a three-necked flask and heated to 60°C. Slowly add 921 ml of 1:1 chemically pure hydrochloric acid into a three-necked flask to make it react with aluminum chips. The addition time of hydrochloric acid is 3 hours; after adding hydrochloric acid, react at a reaction temperature of 90-95°C for 20 hours, and then The product was cooled to 60-70°C and filtered to obtain modified aluminum sol SA-1. The aluminum scraps remaining in the reaction were weighed to 36 grams, that is, the aluminum excess was 14.8% by weight. The modified aluminum sol SA-1 was analyzed and the results were as follows: Al content was 9.0% ...

Technical field

[0001] The invention relates to a catalytic cracking catalyst, a preparation method of the catalytic cracking catalyst, and the application of the catalytic cracking catalyst in the catalytic cracking of heavy oil. Background technique

[0002] Catalytic cracking (FCC) is an important secondary processing process for crude oil, and it occupies a pivotal position in the refining industry. In the catalytic cracking process, heavy distillates (such as vacuum distillate or residual oil with heavier components) react in the presence of a catalyst and are converted into high value-added products such as liquefied petroleum gas, gasoline, and diesel. This process usually requires Use catalytic materials with high cracking activity. Microporous zeolite catalytic materials are widely used in petroleum refining and processing industries due to their excellent shape-selective catalytic performance and high cracking reaction activity. At present, catalytic cracking catalyst...

Examples

preparation example Construction

[0023] In the preparation process of the above-mentioned modified aluminum sol, water can be introduced into the reactor by a soluble silicon-containing compound solution, a chloride solution, a soluble phosphorus-containing compound solution, by adding water such as deionized water, or a combination of the above methods. Water is introduced into the reactor. Preferably, the weight ratio of the water introduced into the reactor before adding chloride to the soluble silicon-containing compound (calculated as Si element) introduced into the reactor before adding chloride is 100:0.1- 10, for example, 100:1-10 or 100:0.1-5 or 100:0.15-1.4 or 100:0.2-1.3:1.

[0024] The content of silicon (calculated as silicon element) in the modified aluminum sol obtained in the present invention is 0.1-1% by weight, preferably 0.2-0.9% by weight, for example, 0.3-0.85% by weight.

[0025] In the preparation process of the above modified aluminum sol, the added amount of the metallic aluminum (calcula...

preparation example

[0069] In the following preparation examples, comparative preparation examples, examples and comparative examples:

[0070] The purity of aluminum chips used is 99.2% by weight, and the purity of aluminum particles is 98.8% by weight; the 1:1 chemically pure hydrochloric acid used is a mixture of 1 volume of 36% by weight chemically pure hydrochloric acid and 1 volume of water; the 1:1 chemically pure phosphoric acid used It is a mixture of 1 volume of chemically pure phosphoric acid with a concentration of 85% by weight and 1 volume of water; the rare earth chloride is purchased from Baotou Steel Rare Earth High-tech Co., Ltd., and the rare earth elements are La and Ce.

[0071] The specific surface area, pore volume and average pore diameter are all measured by the low-temperature nitrogen adsorption-desorption method. The instrument used is the Physicochemical Adsorption Analyzer ASAP2400 from Micromeritics, USA; Na 2 O, Al 2 O 3 , SiO 2 , P 2 O 5 The content of X-ray fluorescenc...

preparation example 1

[0076] This preparation example is used to illustrate the preparation method of the silicon modified aluminum sol provided by the present invention.

[0077] 286 grams of aluminum chips (calculated as Al), 1481 grams of deionized water, and 119 grams of water glass aqueous solution (containing 9.33% by weight of Si elements and 4.63% by weight of Na elements) were put into a three-necked flask and heated to 60°C. Slowly add 921 ml of 1:1 chemically pure hydrochloric acid into a three-necked flask to make it react with aluminum chips. The addition time of hydrochloric acid is 3 hours; after adding hydrochloric acid, react at a reaction temperature of 90-95°C for 20 hours, and then The product was cooled to 60-70°C and filtered to obtain modified aluminum sol SA-1. The aluminum scraps remaining in the reaction were weighed to 36 grams, that is, the aluminum excess was 14.8% by weight. The modified aluminum sol SA-1 was analyzed and the results were as follows: Al content was 9.0% ...

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