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Recycling method for catalytic cracking waste catalyst

A catalytic cracking and waste catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of high preparation cost and complex preparation process, and achieve simple method, low energy consumption, high activity and high performance. The effect of improved distribution of heavy oil cracking products

Inactive Publication Date: 2016-11-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of kaolin microspheres roasted at two temperatures in this method, the preparation process is more complicated and the preparation cost is higher

Method used

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  • Recycling method for catalytic cracking waste catalyst
  • Recycling method for catalytic cracking waste catalyst
  • Recycling method for catalytic cracking waste catalyst

Examples

Experimental program
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Effect test

preparation example Construction

[0027] According to the present invention, the calcined kaolin microspheres refer to kaolin microspheres calcined at high temperature before in-situ crystallization when the catalytic cracking catalyst is prepared by the in-situ crystallization method, which is well known to those skilled in the art, for example, Its preparation method may include the following steps: mixing and beating kaolin, dispersant and water in sequence to obtain kaolin slurry; wherein, SiO 2The calculated weight of the dispersant is 2-4% by weight of the total weight of the kaolin on a dry basis, and the solid content of the kaolin slurry is 35-45% by weight; the kaolin slurry is spray-dried to obtain Kaolin microspheres: roasting the kaolin microspheres at 650-1000° C. for 0.5-20 hours to obtain roasted kaolin microspheres.

[0028] According to the present invention, the directing agent refers to a molecular sieve synthesis raw material with a certain amount of Y-type molecular sieve crystal nuclei, ...

Embodiment 1

[0044] This example illustrates the preparation of calcined kaolin microspheres.

[0045] Add 300g water glass in 15Kg chemical water (provided by Qilu Catalyst Company, SiO 2 262g / L, modulus 3.43, density 1260g / L) as dispersant, add 10Kg dry base kaolin (Suzhou kaolin company product, SiO 2 50.8%, Al 2 o 3 44.3%, K 2 O 0.59%, Fe 2 o 3 0.83%) beating and spray drying to obtain kaolin microspheres. Kaolin microspheres were calcined in a muffle furnace at 900° C. for 3 h to obtain calcined kaolin microspheres.

Embodiment 2

[0047] This example illustrates the preparation of the crystallized microspheres provided by the present invention.

[0048] With 75g calcined kaolin microspheres and 75g catalytic cracking waste catalyst (provided by the catalytic workshop of Yanshan Petrochemical Company, denoted as YH-3: SiO 2 37.4%, Al 2 o 3 52.8%, RE 2 o 3 3.2%, Fe 0.84%, Ni1.19%, V 0.39%) and 371g water glass (Qilu Catalyst Company provides, SiO 2 262g / L, modulus 3.43, density 1260g / L), 214g directing agent and 90g water were mixed evenly in the synthesis kettle, and the temperature was raised to 98°C while stirring, and the dynamic crystallization was maintained for 26h. Then the crystallized product was unloaded, filtered, washed, and dried overnight in an oven at 120°C to obtain the crystallized microsphere provided by the present invention, denoted as KEY-B2, with a crystallinity of 33.7% and a skeleton silicon-aluminum ratio of 5.4. The XRD spectrum of catalytic cracking waste catalyst YH-3 is ...

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Abstract

The invention discloses a recycling method for a catalytic cracking waste catalyst. According to the method, the catalytic cracking waste catalyst and calcined kaolin microspheres serve as main raw materials, under the situation of supplementing a silicon source and not adding an external aluminum source, a fresh catalytic cracking catalyst is prepared through an in-situ crystallization method, and the catalytic cracking waste catalyst is recycled. Compared with an existing catalytic cracking waste catalyst recycling method, the recycling waste for the catalytic cracking waste catalyst is simple and low in energy consumption, and the prepared fresh catalytic cracking catalyst can be subjected to industrial application.

Description

technical field [0001] The invention relates to a method for reusing spent catalytic cracking catalysts. Background technique [0002] Catalytic cracking units discharge a large amount of spent catalysts every year. Due to the high content of heavy metals in catalytic cracking spent catalysts, especially with certain radioactivity, it is harmful to people and the surrounding environment. It has been treated as a harmful substance in foreign countries, and its transportation , discharge, and treatment costs are very high; at the same time, catalyst metal poisoning also greatly reduces the cracking performance and selectivity of the catalyst, which reduces the yield of light oil and directly affects the economic benefits of the refinery. Therefore, the development of catalytic cracking spent catalyst recycling technology will bring great economic and environmental benefits. [0003] Landfilling of spent catalysts is an easy-to-achieve treatment method and is still used today,...

Claims

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Application Information

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IPC IPC(8): B01J29/90B01J29/16
Inventor 王维家张巍毛国芳罗一斌
Owner CHINA PETROLEUM & CHEM CORP
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