Preparation method of solid acid alkylation catalyst

An alkylation and catalyst technology, applied in the field of preparation of solid acid alkylation, can solve the problems of reducing the crystallinity and acidity of molecular sieves, destroying molecular sieve structure, reducing the surface area and pore volume of catalysts, and achieving high activity and stability, high intensity effect

Active Publication Date: 2020-08-04
CHINA PETROLEUM & CHEM CORP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the catalyst formed by this method has good strength, due to the strong acidity of nitric acid, the structure of the molecular sieve will be destroyed, and the surface area and pore volume of the catalyst will be reduced, especially for molecular sieves with a low silicon-aluminum ratio, such as X, Y, etc. , will cause dealumination of the framework, greatly reducing the crystallinity and acidity of molecular sieves

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  • Preparation method of solid acid alkylation catalyst
  • Preparation method of solid acid alkylation catalyst
  • Preparation method of solid acid alkylation catalyst

Examples

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preparation example Construction

[0012] A method for preparing a solid acid catalyst, which is characterized in that it comprises the steps of kneading molecular sieves with acidic aluminum sol with a pH<5, a particle size of 20-300nm, and an alumina concentration of 5-20%, and extrusion molding.

[0013] The molecular screening is selected from one or more of X zeolite, Y zeolite and beta zeolite, wherein Y-type zeolite is preferred, and among said Y-type zeolites, the specific surface area is more preferably 500-700m 2 Modified Y zeolite with a pore volume greater than 0.35mL / g and a unit cell size of 2.450-2.465nm.

[0014] The aluminum sol is nano aluminum sol, the sol is acidic aluminum sol (pH<5), the particle size in the sol is 20-300nm, and the concentration of aluminum oxide is 5-20%.

[0015] The preparation method may also include adding water to ensure a certain water-to-powder ratio of the mixed powder, such as 0.8, and kneading evenly before extruding, drying and roasting the obtained wet strips...

Embodiment 1-3

[0024] This example illustrates the alkylation catalyst of the present invention and its preparation process.

[0025] Y zeolite (specific surface area 680m 2 / g, pore volume 0.36mL / g, unit cell 2.46nm, Sinopec Catalyst Branch) and aluminum sol Al1 (aluminum oxide concentration is 5%, average particle size 20nm, pH is 4.2, Sinopec Catalyst Branch) by weight Mix the ratio of 60:40, 80:20 and 95:5 on a dry basis, and add water to ensure that the water-powder ratio of the mixed powder is 0.8, knead evenly and then extrude the strips, and the obtained wet strips are dried and calcined to obtain a molded catalyst The finished products are named 60A1, 80A1 and 95A1 respectively, and the properties of the obtained catalysts are shown in Table 1.

[0026] Table 1 lists the relevant test data of Y zeolite at the same time.

Embodiment 4-6

[0028] This example illustrates the alkylation catalyst of the present invention and its preparation process.

[0029] Y zeolite and Al2 (aluminum oxide concentration is 15%, average particle size 150nm, pH is 3.8, Sinopec Catalyst Branch Company) is mixed in the ratio of 60:40, 80:20 and 95:5 by weight dry basis percentage respectively, and pass Add water to ensure that the water-powder ratio of the mixed powder is 0.8, knead evenly and then extrude the strips. The obtained wet strips are dried and calcined to obtain finished catalyst products, which are respectively named 60A2, 80A2 and 95A2. The properties of the obtained catalysts are shown in Table 1.

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Abstract

A forming method of a solid acid alkylation catalyst is characterized by comprising the following steps: mixing a molecular sieve and acidic aluminum sol with the pH value of less than 5, the particlesize of 20-300nm and the alumina concentration of 5-20%, grinding the mixture and carrying out extrusion molding. The method is simple and easy to implement, the specific surface area and pore channels of the molecular sieve are not influenced, the acidity of the molecular sieve is not damaged, and the obtained forming agent has high strength and shows high activity and stability in alkylation reaction, especially isobutane/butene alkylation reaction.

Description

technical field [0001] The invention relates to a preparation method for solid acid alkylation, the obtained catalyst and its application. Background technique [0002] The alkylation reaction of isobutane and butene is an important process in the petroleum refining industry to produce high-octane gasoline components. As an ideal high-octane gasoline blending component, this alkylated oil has octane High alkane number, low sensitivity, low Reid method vapor pressure, no olefins, aromatics, low sulfur content. [0003] Solid acid alkylation technology is a green alkylation technology and the most promising alkylation technology at present. The core of the solid acid alkylation process is the development of solid acid catalysts with excellent performance. At present, solid acid alkylation catalysts are mainly divided into four categories: metal halides, solid superacids, supported heteropolyacids and molecular sieves. Among them, molecular sieve catalysts are widely used in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08B01J29/18B01J29/70B01J29/80C10G50/00
CPCB01J29/082B01J29/084B01J29/18B01J29/7007B01J29/80C10G50/00C10G2300/70
Inventor 张成喜李永祥胡合新付强慕旭宏舒兴田梁维军伍欣华
Owner CHINA PETROLEUM & CHEM CORP
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