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Kaolin product for catalytic cracking catalyst and preparation method thereof

A catalytic cracking and catalyst technology, applied in catalytic cracking, chemical instruments and methods, cracking, etc., can solve problems such as lack of kaolin products

Active Publication Date: 2008-08-27
中国高岭土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of kaolin product for catalytic cracking catalyst and its preparation method, solve the problem of lack of kaolin product specially used in the preparation of catalytic cracking catalyst on the market

Method used

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  • Kaolin product for catalytic cracking catalyst and preparation method thereof
  • Kaolin product for catalytic cracking catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment one: the preparation method of kaolin product for catalytic cracking catalyst, is made up of following steps successively:

[0043] (1) Stir and mix pulverized raw kaolin ore, water and dispersant to obtain slurry; wherein, the mass ratio of kaolin raw ore and water is 1:1, and the mass ratio of kaolin raw ore and dispersant is 1:0.0015; The dispersant is a mixture of water glass and sodium hexametaphosphate with a mass ratio of 3.5:1.

[0044] (2) Slurry is sequentially sorted through Φ200 hydrocyclone, Φ150 hydrocyclone, and Φ75 hydrocyclone to obtain primary overflow; among them, the slurry inlet pressure of Φ200 hydrocyclone is 0.22MPa, and the slurry inlet The concentration is 25%; the feeding pressure of Φ150 hydrocyclone is 0.3MPa, and the feeding concentration is 19%; the feeding pressure of Φ75 hydrocyclone is 0.3MPa, and the feeding concentration is 15%;

[0045] (3) The primary selection overflow is sorted by a Φ25 hydrocyclone or a Φ10 hydrocyclo...

Embodiment 2

[0049] Example 2: Kaolin product for catalytic cracking catalyst and its preparation method

[0050] Slurry the kaolin in the Suzhou area, add two thousandths of a dispersant (the ratio of water glass and sodium hexametaphosphate is 2.5:1), and the pulping concentration is 32%; the slurry is composed of Φ200, Φ150, and Φ75 respectively A large amount of quartz sand is removed by rough separation; the overflow of Φ75 passes through the Φ25 cyclone, and the obtained underflow is used as a by-product; the overflow is bleached with sodium dithionite (sodium hyposulfite), and the bleached pulp is flocculated The product is obtained after three steps of dehydration, filter press dehydration and drying. The scanning electron microscope picture of the product is attached figure 1 shown.

[0051] Analyze the physical and chemical indicators of the product, the results are as follows:

[0052] Kaolin Elo Free Fe 2 o 3 K 2 O+ granularity

[0053] Stone Contain...

Embodiment 3

[0061] Embodiment 3: Kaolin product and preparation method thereof for catalytic cracking catalyst

[0062] Suzhou kaolin and Maoming kaolin are used as raw materials, and the ratio of the two is about 1.5:1. The overflow of the second group of Φ10 is bleached with sodium hypochlorite (NaClO) and then the clear water layer is removed (the dosage of the bleaching agent is 3 / 1000, and the pH is 3-4). The final slurry is dehydrated by pressure filtration and then dried naturally. Other steps are with embodiment one, and the scanning electron microscope figure of product is as attached figure 2 shown.

[0063] Analyze the physical and chemical indicators of the product, the results are as follows:

[0064] Kaolin Elo Free Fe 2 o 3 K 2O+ granularity

[0065] Stone Contains Stone Contains Quartz Content Na 2 O 325 mesh less than average

[0066] Amount % Amount % % % Content % Sieve residue 2μm containing Particle size

[0067] ...

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Abstract

The invention relates to a kaolin product for catalytic cracking catalyst and the process for preparation. The process for preparation comprises the following steps: stirring to evenly mix kaolin raw ore, water and dispersing agent to get slurry, wherein slurry is combined through a hydraulic cyclone in turn to sort to get overflow, bleaching overflow to get pulp, and getting kaolin product for catalytic cracking catalyst after pulp is dewatered. Particle size distribution of kaolin product is that 325order sieve residue <=5ppm, the content which is less than 2um is bigger or equal to 92%, the average partial size is 0.5-0.8um, the composition control of kaolin product is that the content of Al2O3 is bigger or equal to 38%, the content kaolin group mineral is bigger or equal to 90%, wherein the proposition of galapectite and kaolinite is 1.2-2.5:1, the content of harmful impurity is that the content of K2O+Na2O is less than or is equal to 0.6%, and the content of Fe2O3 is less or equal to 0.4%. Catalytic cracking catalyst which is prepared by the invention has the advantages of little specific area, bigger hole volume, excellent antiwear property, strong capabilities of alkali resistant and anti-heavy metal pollution and the like.

Description

technical field [0001] The invention relates to a kaolin product for a catalytic cracking catalyst and a preparation method thereof. The kaolin product is used for preparing a catalyst used in a catalytic cracking process in the petrochemical industry. Background technique [0002] Catalytic cracking is a process in which a series of chemical reactions occur in crude oil at a certain temperature (460°C to 550°C) with the participation of a catalyst. Research on catalytic process and catalytic cracking catalyst (FCC) is a core technology and an important scientific and technological basis in today's petrochemical industry. In the history of the development of catalytic cracking catalysts, it has roughly experienced three major changes. For the first time, activated clay was replaced by artificially synthesized aluminum silicate gel, which increased the activity by 2 to 3 times and significantly improved the selectivity. The second time was to use molecular sieves, which gre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/02C01B33/40
Inventor 李勇杨圣军张忠飞陈丽昆邵晓秋朱明秀冯杰
Owner 中国高岭土有限公司
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