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Cracking catalyst and preparation method thereof

A cracking catalyst and catalyst technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, molecular sieve catalyst, etc., can solve the problems of low molecular sieve yield, small molecular sieve stack ratio, and difficult recovery, etc. Effects of stability, increased pore volume, and high crystallinity

Active Publication Date: 2011-04-27
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

[0005] The above preparation method of cracking catalyst containing ultra-stable Y-type molecular sieves first prepares ultra-stable Y-type molecular sieves, then mixes ultra-stable Y-type molecular sieves with carriers, beats them, and dries them into shapes. Difficulty, often leads to low yield of molecular sieve synthesis

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  • Cracking catalyst and preparation method thereof
  • Cracking catalyst and preparation method thereof
  • Cracking catalyst and preparation method thereof

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preparation example Construction

[0028] In the cracking catalyst preparation method provided by the present invention, can also comprise the step of introducing auxiliary component, described auxiliary component can be introduced in the process of preparing slurry in step (1), also can be after step (1), Before step (5), add a step of contacting the catalyst precursor with the auxiliary component. The additive component such as rare earth compound, based on the weight of the catalyst, the content of the rare earth element of the catalyst is no more than 5% by weight (in RE 2 o 3 ), wherein the rare earth element is a mixed rare earth element based on lanthanum and / or cerium, wherein the content of lanthanum and / or cerium is more than 50% by weight of the total amount of rare earth elements, preferably more than 60% by weight. Preference is given to incorporating soluble salts of rare earths.

[0029] In the catalyst preparation method provided by the invention, the relative crystallinity retention of the Y-...

Embodiment 1-5

[0035] These examples illustrate the preparation of the catalyst precursors provided by the present invention.

[0036] Among the raw materials used, the molecular sieves are all produced by Sinopec Catalyst Qilu Branch. Among them, the unit cell constant of NaY molecular sieve is 2.473 nanometers, the content of sodium oxide is 14% by weight, the solid content is 79.48% by weight, and the crystallinity is 100%. The unit cell constant of REHY molecular sieve 2.470 nanometers, sodium oxide content 3.8 wt%, rare earth oxide content 6.5 wt%, solid content 78.4 wt%, crystallinity 86%; V-REHY molecular sieve unit cell constant is 2.469 nm, sodium oxide content 3.8 wt%, rare earth oxide The vanadium content is 6.5% by weight, the vanadium (calculated as simple substance) content is 1.0% by weight, the solid content is 77.9% by weight, and the crystallinity is 77%. Kaolin is an industrial product of China Kaolin Company, and its solid content is 84% ​​by weight; pseudoboehmite is pro...

Embodiment 6～7

[0046] In 100 grams (dry basis weight) catalyst precursor CM-1, CM-2, add deionized water respectively, make the water content in the catalyst precursor be 15% by weight (based on the dry basis weight of the catalyst precursor), At 450° C., 100% water vapor atmosphere was roasted for 1.5 hours, and then mixed with 2 liters of ammonium ion concentration of 6% by weight (NH 4 ) 2 SO 4 Mix the aqueous solution, conduct ion exchange at 90°C for 45 minutes, add hydrochloric acid during the exchange process, keep the pH value of the slurry at 4.0, then filter, wash the filter cake with deionized water until no sulfate is detected in the washed water, and wet filter The cake was baked at 750° C. for 2 hours, and then mixed with 2 liters of ammonium ion concentration of 3% by weight (NH 4 ) 2 SO 4 The aqueous solution was ion-exchanged at 85°C for 30 minutes. During the exchange process, the pH value of the slurry was controlled to 3.5 with hydrochloric acid, filtered, and the fil...

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Abstract

The invention relates to a preparation method of a cracking catalyst, which comprises: raw materials and water are mixed to prepare a slurry solution by utilizing the catalyst containing a Y type molecular sieve and a silicon vector; the slurry solution is dried to obtain a catalyst precursor; the catalyst precursor is baked; and a contact reaction is carried out on the catalyst precursor and an acidic ammonium salt solution. The preparation method of the cracking catalyst can enhance the crystallization retaining degree of the Y type molecular sieve in the catalyst and the stability of the catalyst. The catalyst prepared by utilizing the method is used for the catalytic cracking of heavy oil and has the advantages of strong conversion capability of the heavy oil, high yield of gasoline, and low sulphur content in the gasoline.

Description

technical field [0001] The invention relates to a hydrocarbon oil catalytic cracking catalyst containing ultra-stable Y-type molecular sieve and a preparation method thereof. Background technique [0002] The ultra-stable Y-type molecular sieve with a high silicon-aluminum ratio has good hydrothermal stability and more mesopores, and has a high conversion rate of heavy oil when used in heavy oil catalytic cracking, and is the main active component of existing heavy oil catalytic cracking catalysts. The method for industrially producing ultra-stable Y-type molecular sieves is mainly a hydrothermal method (such as the method disclosed by CN1005405C and CN1065844A), which deals with molecular sieves under a high-temperature water vapor atmosphere to improve the silicon-aluminum ratio of molecular sieves. However, since there is no The external silicon source fills the vacancies generated by dealumination. This method will cause defects in the crystal structure, and the crystall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/16B01J29/08B01J37/08C10G11/05
Inventor 王鹏孙言陈振宇陆友保朱玉霞田辉平
Owner CHINA PETROLEUM & CHEM CORP
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