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A kind of catalytic cracking catalyst and preparation method thereof

A catalytic cracking and catalyst technology, used in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of rare earth loss and reduced utilization rate of rare earth, and achieve high crystal retention, high utilization rate of rare earth, flexible rare earth The effect of content

Active Publication Date: 2016-07-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In the prior art, regardless of the rare earth Y molecular sieve obtained by the double-cross-two-baking process or the one-cross-one-baking process, the rare earth content in the product is always lower than the total rare earth amount input, such as CN1053808A, CN1069553C, several disclosed in CN1026225C All kinds of rare earth Y molecular sieves have this feature. Even if more rare earth ions are located in the small cages, it is inevitable that some rare earth ions still exist in the supercages, and the rare earth ions in the supercages will be washed in the subsequent washing process. It is backwashed down, resulting in the loss of rare earths, resulting in a decrease in the utilization rate of rare earths

Method used

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  • A kind of catalytic cracking catalyst and preparation method thereof
  • A kind of catalytic cracking catalyst and preparation method thereof

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preparation example Construction

[0031] The preparation method of catalytic cracking catalyst provided by the invention preferably comprises the following steps:

[0032] (1) Contact the NaY molecular sieve with the rare earth solution or the mixed solution of the rare earth solution and the ammonium salt, filter, wash with water, and dry for the first time to obtain the rare earth sodium Y molecular sieve; then beat the rare earth sodium Y molecular sieve And contact with ammonium salt solution or acid solution, filter and mix with rare earth solution, adjust the pH value of the slurry to 6-10, filter or not filter, dry, and perform a second roasting treatment to obtain the rare earth solution provided by the invention Y-type molecular sieve (the first Y-type molecular sieve);

[0033] (2) Mix and beat the cracking active component, clay and binder, then spray dry, wash, filter and dry in sequence, wherein the cracking active component includes the rare earth-containing Y-type molecular sieve (the first Y t...

Embodiment 1

[0049] (1) Preparation of rare earth Y-type molecular sieve

[0050] Take 2.6 kg of NaY molecular sieve (Sinopec Catalyst Qilu Branch Company, 22.5% by weight, silicon-aluminum ratio 2.7, crystallinity 88%, the same below) and 15 kg of deionized water, mix and beat, add 1.0 liter concentration of 160gRE 2 o 3 / L of rare earth chloride solution and 0.24 kg of ammonium chloride solid, stir well, raise the temperature to 70°C and adjust the pH of the slurry to 4.0 with dilute hydrochloric acid, continue to exchange for 1.5 hours, filter, wash with water, and dry, and store under 100% steam Calcined at 550°C for 2 hours to obtain cross-calcined rare earth sodium Y molecular sieve Y-A1. The chemical composition of Y-A1 is 5.1% by weight of sodium oxide and 7.8% by weight of rare earth oxide. Then by molecular sieve: NH 4 Cl:H 2The ratio of O=1:0.2:10 is beaten and exchanged at 70°C for 1 hour. After filtering and washing, re-beating and adding 0.27 liters of concentration 300gRE...

Embodiment 2

[0055] The pseudo-boehmite of 22 weight parts on a dry basis is mixed with deionized water for beating, and adding concentration to the obtained slurry is 36% by weight hydrochloric acid peptization, the acid-aluminum ratio (the 36% by weight hydrochloric acid and The weight ratio of pseudo-boehmite on a dry basis) is 0.20, the temperature is raised to 65°C for acidification for 1 hour, and 34 parts by weight of kaolin slurry on a dry basis and 11 parts by weight of aluminum sol on a dry basis are added , stirred for 20 minutes, then added 31 parts by weight of rare earth Y-type molecular sieve Y-A and 2 parts by weight of DASY2.0 molecular sieve mixed slurry based on dry basis, and stirred for 30 minutes to obtain a solid content of 30% by weight The slurry was spray-dried to make a microsphere catalyst. The microsphere catalyst was calcined at 500°C for 1 hour, and then heated at 60°C with (NH 4 ) 2 SO 4 Washing ((NH 4 ) 2 SO 4 : microsphere catalyst: H 2 O weight rat...

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Abstract

The invention relates to a catalytic cracking catalyst and a preparation method. The catalytic cracking catalyst contains a cracking activity component, clay and an adhesive, wherein the cracking activity component comprises a rare-earth Y-type molecular sieve; and the rare-earth content in the Y-type molecular sieve is 10-25 wt% on the basis of rare-earth oxides, the cell constant is 2.440-2.472nm, the crystallinity is 35-65%, the silicon / aluminum atomic ratio in the framework is 2.5-5.0, and the product of the ratio (I1 / I2) of 2theta=11.8+ / -0.1 degree peak intensity I1 to 2theta=12.3+ / -0.1 degree peak intensity I2 in an X-ray diffraction pattern and the rare-earth weight percent in the molecular sieve on the basis of rare-earth oxides is greater than 50. The preparation method comprises the following steps: preparing a mixed slurry containing the cracking activity component, adhesive and clay, carrying out spray drying, washing and drying. Compared with the prior art, the rare-earth-containing Y-type molecular sieve has higher structural stability and activity stability; and the catalyst has higher thermal and hydrothermal stability, and can reduce the consumption of the molecular sieves in the catalyst, thereby lowering the catalyst production cost.

Description

technical field [0001] The invention relates to a catalytic cracking catalyst containing rare earth modified Y-type molecular sieve and its preparation. Background technique [0002] Catalytic cracking (FCC) is an important secondary processing process of crude oil and occupies a pivotal position in the oil refining industry. In the catalytic cracking process, heavy fractions such as vacuum distillate oil or residues of heavier components react in the presence of catalysts and are converted into high value-added products such as liquefied gas, gasoline, and diesel oil. In this process, it is usually necessary to use Catalytic material 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 reactivity. Among them, Y-type molecular sieve has been the main active component of catalytic cracking catalyst since it was first ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/08C10G11/05C10G11/18
Inventor 龙军朱玉霞罗一斌任飞郑金玉邓景辉杨雪
Owner CHINA PETROLEUM & CHEM CORP
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