Catalytic cracking catalyst and preparation method thereof

A catalytic cracking and catalyst technology, applied in the direction of catalyst activation/preparation, catalytic cracking, physical/chemical process catalysts, etc., can solve the problem of high coke formation of catalytic cracking catalysts

Pending Publication Date: 2021-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a catalytic cracking catalyst with less coke in the case of a relatively high conversion rate of heavy oil, which contains Active ingredient of NSY molecular sieve

Method used

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  • Catalytic cracking catalyst and preparation method thereof
  • Catalytic cracking catalyst and preparation method thereof
  • Catalytic cracking catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0043] One embodiment, the modified NSY molecular sieve is prepared according to the following steps:

[0044] (1) converting kaolin into metakaolin by roasting and dehydrating at 500-900°C, pulverizing it to make a powder with a particle size of less than 10 microns;

[0045] (2) adding sodium silicate, directing agent, sodium hydroxide solution and water to metakaolin powder to make a reaction slurry, wherein the mass ratio of directing agent to metakaolin is 0.01 to 1.0;

[0046] (3) Crystallize the reaction slurry prepared in (2) at 88-98°C for 1-70 hours, such as 5-40 hours or 6-30 hours or 8-16 hours, and then supplement solid silica gel, wherein the mass ratio of solid silica gel to metakaolin 0.01~1.0;

[0047] (4) Crystallize the reaction raw material prepared in (3) under stirring at 88-98° C., the crystallization time is 1-20 hours, such as 8-20 hours or 12-16 hours, and then filter and dry to obtain the compound synthesized by in-situ crystallization NSY molecula...

preparation Embodiment 1

[0063] 100 kilograms of pulverized metakaolin powders were added with 400 kilograms of sodium silicate solution (containing 20.05% by weight of SiO2) under stirring. 2 , 6.41 wt% Na 2 (0), 60 kilograms of directing agent and 100 kilograms of concentrations are 5% by weight of sodium hydroxide solution. Raise the temperature to 95°C and stir at a constant temperature. After 8 hours, add 10 kg of solid silica gel (Qingdao Ocean Chemical Group Special Silica Gel Factory, Type A), and recrystallize for 12 hours. The stirring speed is 400 rpm during addition and crystallization. After the crystallization was completed, the crystallization tank was rapidly cooled, filtered, and washed with water until the pH value of the washing solution was less than 10. Drying at 120° C. for 2 hours obtained the zeolite material Y-1. Measure Y-1 by X-ray diffraction method, crystallinity of peak height method, K1 value of ratio of crystallinity of peak height method to crystallinity of peak area ...

preparation Embodiment 2

[0065] Prepare the method for embodiment 1 by molecular sieve, the metakaolin powder after 100 kilograms of pulverizations, add 380 kilograms of sodium silicate solutions (containing the SiO of 20.05% by weight) under stirring 2 , 6.41 wt% Na 2 (0), 60 kilograms of directing agent, 100 kilograms of concentration is the sodium hydroxide solution of 5% by weight. Raise the temperature to 93°C and stir at a constant temperature. After 8 hours, add 15 kg of solid silica gel (Qingdao Ocean Chemical Group Special Silica Gel Factory, Type A), and recrystallize for 14 hours. The stirring speed is 400 rpm during addition and crystallization. After the crystallization is completed, the crystallization tank is rapidly cooled, filtered, and washed with water until the pH value of the washing liquid is less than 10. Drying at 120° C. for 2 hours yields the zeolite material Y-2. Measure Y-2 by X-ray diffraction method, crystallinity of peak height method, K1 value of the ratio of crystalli...

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Abstract

The invention belongs to the field of catalyst preparation, and relates to a catalytic cracking catalyst and a preparation method thereof. The catalytic cracking catalyst comprises 10-70 wt% of a cracking activity component, 10-60 wt% of a binder and 10-70 wt% of clay, wherein the cracking activity component comprises 5-100 wt% of a first Y-type molecular sieve and 0-95 wt% of a second molecular sieve; and the first Y-type molecular sieve is a modified NSY-type molecular sieve, and the sodium oxide content of the first Y-type molecular sieve is less than 2wt%. The preparation method of the catalyst comprises the steps of pulping the cracking active component containing the modified NSY molecular sieve, the binder and the clay, spray-drying, washing, filtering and drying. The catalyst is used for heavy oil catalytic cracking reaction, and has good coke selectivity and high heavy oil conversion rate.

Description

technical field [0001] The present invention relates to a catalytic cracking catalyst, and more particularly to a catalytic cracking catalyst with low coke formation and a preparation method thereof 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. Y-type zeolite is widely used in catalytic cracking reactions due to its excellent shape-selective catalytic performance and high cracking reaction activity. Y-type zeolite is obtained through two techniques: one technique is to use alkaline silica-alumina gel synthesi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80B01J29/08B01J37/30C10G11/05
CPCB01J29/80B01J29/088B01J37/30C10G11/05C10G2300/1037C10G2400/02C10G2400/04B01J29/40B01J2229/186B01J2229/20
Inventor 杨雪沈宁元孙敏王振波周继红罗一斌
Owner CHINA PETROLEUM & CHEM CORP
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