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Magnesium-aluminum sol and its preparation method and application, catalytic cracking catalyst and its preparation method

A technology of magnesium-aluminum sol and aluminum sol, which is applied in the field of catalytic cracking catalyst and its preparation, can solve the problems of poor catalyst strength, high drying temperature, and high evaporation heat, and achieve reduced addition, low corrosion rate, and free chlorine ion little effect

Active Publication Date: 2019-11-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of spray drying is to evaporate excess water in the slurry at a certain temperature. When the solid content is low, more water needs to be evaporated, and the residence time of the material in the drying tower is the same, so more evaporation heat or high drying temperature is required. Moisture escapes from the inner surface of the rapid type particles at high temperature to form hollow spheres or microspheres with apple stalks. On the one hand, the strength of the catalyst will deteriorate, and on the other hand, it will be easily broken when fluidized in the FCC reverse system.

Method used

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  • Magnesium-aluminum sol and its preparation method and application, catalytic cracking catalyst and its preparation method
  • Magnesium-aluminum sol and its preparation method and application, catalytic cracking catalyst and its preparation method
  • Magnesium-aluminum sol and its preparation method and application, catalytic cracking catalyst and its preparation method

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preparation example Construction

[0056] The method for preparing aluminum sol of the present invention can reduce the amount of hydrochloric acid used, the added amount of chloride ions, reduce the damage of the properties of the aluminum sol by free acid, improve the activity of the aluminum sol, and at the same time can avoid the pH value of the aluminum sol caused by excessive hydrochloric acid. If it is too low, it will destroy the molecular sieve and affect the catalyst activity.

[0057] In the method for preparing an aluminum sol of the present invention, the first contact and the second contact are accompanied by stirring, and when the stirring is stopped, the process of the first contact and the second contact ends. The time of the first contact and the second contact described below is the time under which stirring is continued.

[0058] According to a preferred embodiment of the present invention for preparing the aluminum sol, the temperature of the first contact is 50-80°C.

[0059] According to...

Embodiment approach

[0076] According to a preferred embodiment of the preparation method of magnesium-aluminum sol of the present invention, it further comprises: secondly mixing the product obtained by the first mixing with phosphorus compound and / or rare earth compound; the second mixing temperature is 30-60 ℃ °C, and the second mixing time is 0.5 to 2 hours.

[0077] In the preparation method of the magnesium-alumina sol of the present invention, the first mixing and the second mixing are accompanied by stirring, and when the stirring is stopped, the first mixing and the second mixing are completed. The time of the first mixing and the second mixing described below is the time under which the stirring is continued.

[0078] In the preparation method of the magnesium-aluminum sol of the present invention, preferably, before the second mixing is performed, the product obtained by the first mixing is allowed to stand at room temperature for 0.5-1.5 h. The standing means that after the stirring a...

Embodiment 1

[0127] This example illustrates the preparation method of the aluminum sol of the present invention.

[0128] (1) carry out the first contact with 1mol metal aluminum (China Aluminum Corporation) and 1mol (HCl) hydrochloric acid, control the first contact process temperature to be 50 ° C, the first contact time is 3h, and the initial concentration of hydrochloric acid used is 32% by weight ;

[0129] (2) The mixture after the first contact was allowed to stand at room temperature of 20°C for 6 hours, and then mixed with γ-Al 2 O 3 (Shandong Aluminum Plant) and η-Al 2 O 3 (Shandong Aluminum Factory) to carry out the second contact, the second contact temperature is 30 ℃, the second contact time is 4h, the γ-Al in terms of aluminum 2 O 3 , η-Al in terms of aluminum 2 O 3 The molar ratio to the metal aluminum of step (1) is 0.05:0.05:1. The physicochemical properties of the aluminum sol are shown in Table 1.

[0130] aluminum sol 27 Al NMR measurement, see the spectrum ...

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Abstract

The invention relates to the field of magnesium-aluminium sol for a catalytic cracking catalyst and discloses magnesium-aluminium sol, a preparation method and application thereof, a catalytic cracking catalyst and a preparation method thereof. Molar ratio of Mg: Al in the magnesium-aluminium sol is (1.5-6): (1-2), preferably (4-6): 1. Molar ratio of Al: Cl in the magnesium-aluminium sol is (1-1.5): 1. When the magnesium-aluminium sol provided by the invention is used as a binder for a catalytic cracking catalyst, particle structure of the binder can be enhanced, bonding performance of the binder can be improved, blocking of the molecular sieve structure of an active ingredient in the catalyst by the binder is reduced, influence of the binder on activity of the catalyst is decreased, application amount of a molecular sieve in the catalyst can be reduced, and cost of the catalyst is lowered.

Description

technical field [0001] The invention relates to the field of magnesium-aluminum sol for catalytic cracking catalyst, in particular to a magnesium-aluminum sol, a preparation method of the magnesium-aluminum sol and application in the preparation of a catalytic cracking catalyst, and a magnesium-aluminum sol containing the magnesium-aluminum sol as a binder Catalytic cracking catalyst and preparation method thereof. Background technique [0002] The fluid catalytic cracking process is the most important means of secondary processing of crude oil. With the deepening of the heavier and inferior quality of the FCC feed, the content of the active component molecular sieve in the catalyst has increased from 15-20% in the early stage to the present. 35% or even more than 40%. With the increase of molecular sieve content, the wear index and sphericity of the catalyst have become a very important problem in the catalyst preparation process. The catalyst must meet certain strength r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/00C10G11/08B01J29/08B01J37/00
CPCB01J13/0047B01J29/088B01J37/0018C10G11/08C10G2300/70
Inventor 许明德张万虹严加松张杰潇邱中红田辉平
Owner CHINA PETROLEUM & CHEM CORP
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