Boron-containing catalytic cracking catalyst for increasing ethylene yield, preparation method and application method thereof

A catalytic cracking and catalyst technology, used in carbon compound catalysts, including molecular sieve catalysts, physical/chemical process catalysts, etc., can solve the problems of high activation energy, decreased conversion rate of heavy oil, and increased coke yield.

Pending Publication Date: 2020-10-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with macromolecular linear hydrocarbons, the activation energy required for ring-opening cracking of polycyclic naphthenes is higher, and they are prone to hydrogen transfer reactions and dehydrogenation reactions into condensed ring aromatics, which will reduce the conversion rate of heavy oil and increase the coke yield.
[0004] CN104607255B discloses a method for preparing a low-L acid high-B acid catalytic cracking catalyst impregnated with boric acid, the method improves the coke selectivity of the catalyst by introducing boron into the catalyst, improves the gasoline and diesel yield, but makes low Carbon yield drops
The composition is used to crack hydrocarbon feeds, especially when processing high-nickel and high-vanadium residue feedstocks, to reduce hydrogen and coke yields, but not to improve low-carbon olefins yields

Method used

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  • Boron-containing catalytic cracking catalyst for increasing ethylene yield, preparation method and application method thereof
  • Boron-containing catalytic cracking catalyst for increasing ethylene yield, preparation method and application method thereof

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Embodiment approach

[0050] According to the preparation method of catalytic cracking catalyst provided by the present invention, one embodiment, the method for preparing boron-aluminum composite oxide comprises the following steps:

[0051] (1) mixing the alumina precursor with water to obtain a mixture 2;

[0052] (2) mixing the precursor of boron and water to prepare mixture 3;

[0053] (3) mix mixture 3 and mixture 2, and then acidify by adding an appropriate amount of acid to form mixture 1;

[0054] (4) The mixture 1 obtained in step (3) is dried and calcined.

[0055] According to the preparation method of catalytic cracking catalyst provided by the present invention, in the preparation method of boron-aluminum composite oxide, in step (1), a mixture containing alumina precursor and water is formed, which is called mixture 2 in the present invention. Usually, the precursor of alumina is mixed with water and beaten, and the solid content of the mixture is preferably 10-18% by weight, such ...

Embodiment 1

[0077] (1) Preparation of boron-aluminum composite oxide: add 670g of deionized water to the beaker, then add 130g of SB powder, disperse in the homogenizer for 30min, then add 53g of boric acid, disperse in the homogenizer for 20min, and finally add hydrochloric acid 20g was acidified to obtain mixture 1 with a pH value of 1.0; the mixture 1 was dried at 120°C for 12 hours, and calcined at 650°C for 4 hours to obtain a boron-aluminum composite oxide, denoted as BA1. The composition of the boron-aluminum composite oxide: B 2 o 3 The content is 23.5% by weight, the content of alumina is 76.5% by weight, it has a rod-like structure, the minimum size of the shortest side of the grain is 10nm, the pore volume is 0.31ml / g, and the pore distribution: diameter 2-2 / g.

[0078] (2) Catalyst preparation: first add 188g of kaolin to be beaten with water to obtain a slurry with a solid content of 40% by weight, add 74g of aluminum sol for beating to obtain a kaolin slurry containing alu...

Embodiment 2

[0081] (1) Preparation of boron-aluminum composite oxide: add 369g deionized water to a beaker, then add 130g of pseudoboehmite dry powder, disperse in a homogenizer for 30min; add 300g deionized water to another beaker, and then Add 53g of boric acid, heat it at 80°C for 30min to dissolve it; then mix the two solutions, disperse them in a homogenizer for 20min, and finally add 20g of hydrochloric acid to acidify to obtain mixture 2, whose pH value is 2.41, and the mixture Dry at 100°C for 24h, and bake at 800°C for 2h to obtain boron-aluminum composite oxide BA2. The composition of the boron-aluminum composite oxide: B 2 o 3 The content is 23.5% by weight, the content of alumina is 76.5% by weight, it has a rod-like structure, the shortest side of the grain is 11nm, the pore volume is 0.23ml / g, and the pore distribution: diameter 2-2 / g.

[0082] (2) Catalyst preparation: first mix kaolin 188g with water and make a slurry to obtain a slurry with a solid content of 40% by we...

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Abstract

The invention relates to a boron-containing catalytic cracking catalyst for increasing ethylene yield, a preparation method and an application method thereof. The catalytic cracking catalyst comprisesnatural minerals, a boron-aluminum composite oxide, an inorganic oxide binder, a Y-type molecular sieve and a shape-selective molecular sieve. The preparation method comprises the following steps: preparing a boron-aluminum composite oxide, forming a slurry containing boron-aluminum composite oxide, a molecular sieve, natural mineral substance, an inorganic oxide binder and water, and carrying out spray drying, wherein the preparation method of the boron-aluminum composite oxide comprises the steps of mixing an aluminum oxide precursor, a boron precursor and water, adding an acid, acidifying,drying, and roasting. The catalytic cracking catalyst provided by the invention is used for conversion of hydrocarbon oil rich in naphthenic cyclic hydrocarbon, and has high ethylene yield.

Description

technical field [0001] The invention relates to a catalytic cracking catalyst for hydrocarbon oil rich in naphthenic naphthenic hydrocarbons to produce more ethylene, a preparation method and an application method thereof. Background technique [0002] Low-carbon olefins such as ethylene, propylene, and butene are essential chemical raw materials and can be used to synthesize resins, fibers, and rubber. Among them, propylene is an important raw material used to manufacture petrochemical products after ethylene, and is mainly used to produce chemical products such as polypropylene, acrylonitrile, and propylene oxide. At present, propylene at home and abroad mainly comes from the by-products of thermal cracking to produce ethylene. The second largest source of propylene is the FCC unit, which provides about 30% of the demand. In the United States, the FCC unit provides the demand for propylene from petrochemical products. half of. Therefore, it is an effective and efficient ...

Claims

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Application Information

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IPC IPC(8): B01J29/80B01J35/10C07C4/06
CPCB01J29/80C07C4/06B01J29/46B01J29/084C07C2529/80B01J2229/20B01J35/40B01J35/615B01J35/633B01J35/647C07C11/04C07C11/06Y02P20/52
Inventor 王鹏陈惠孙敏林伟宋海涛严加松王丽霞田辉平张久顺
Owner CHINA PETROLEUM & CHEM CORP
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