Modification method of faujasite molecular sieve, obtained modified faujasite molecular sieve and application

A faujasite and molecular sieve technology, which is applied in the field of zeolite molecular sieve catalyst preparation, achieves the effects of significant improvement, low requirements for process equipment, and strong applicability

Pending Publication Date: 2022-03-01
PETROCHINA CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the gas-phase ultra-stable method reported by Beyer et al. adopts a fixed-bed reactor (bed reaction), which is to pass a certain amount of silicon tetrachloride through a NaY zeolite powder bed with a certain thickness under the temperature condition of 457~557°C. , and the reaction time is 2 hours, which is a batch method and is not suitable for continuous and large-scale preparation of gas phase ultrastable Y zeolite

Method used

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  • Modification method of faujasite molecular sieve, obtained modified faujasite molecular sieve and application
  • Modification method of faujasite molecular sieve, obtained modified faujasite molecular sieve and application
  • Modification method of faujasite molecular sieve, obtained modified faujasite molecular sieve and application

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Embodiment 1

[0085] After drying at 400°C for 6 hours, NaY zeolite (loose bulk density 0.2294cm 3 / g, 90% particle diameter (Dv 0.9) is 14.99 microns), is sent to vertical reactor (the dry NaY that enters reactor per minute is 30 grams) through conveyer, and molecular sieve enters reaction by the top of vertical reactor The device moves downward, and contacts with the silicon tetrachloride vapor entering from the lower part of the reactor for 4 seconds at 400°C, and then the crude product molecular sieve is moved out of the reactor from the lower part of the reactor by another conveyor. The volume of the reactor is 30cm 3 , The volume of the reactor in this embodiment is about 3 times of the loose bulk volume of the NaY zeolite material entering the reactor during the contact time. The weight ratio of NaY zeolite to silicon tetrachloride in the reactor was kept at 1:0.1. The crude product removed from the reactor is vacuum degassed (the purpose is mainly to remove a small amount of adsor...

Embodiment 2

[0087] NaY zeolite (loose bulk density 0.2294cm) dried at 550°C for 4h 3 / g, 90% particle diameter (Dv 0.9) is 14.99 microns), is sent to vertical reactor (the dry NaY that enters reactor per minute is 30 grams) through conveyer, and molecular sieve enters reaction by the top of vertical reactor The device moves downward, and contacts with the silicon tetrachloride vapor entering from the lower part of the reactor for 1 second under the condition of 420 ° C, and then the crude product molecular sieve is moved out of the reactor from the lower part of the reactor by another conveyor. The volume of the reactor is 30cm 3 , The volume of the reactor in this embodiment is about 14 times of the loose bulk volume of the NaY zeolite material entering the reactor during the contact time. The weight ratio of NaY zeolite to silicon tetrachloride in the reactor was kept at 1:0.15. The crude product removed from the reactor was vacuumed and degassed, then washed three times with 6 times ...

Embodiment 3

[0089] NaY zeolite (loose bulk density 0.2294cm) dried at 600°C for 2 hours 3 / g, 90% particle diameter (Dv 0.9) is 14.99 microns), is sent to vertical reactor (the dry NaY that enters reactor per minute is 14 grams) through conveyer, and molecular sieve enters reaction by the top of vertical reactor The device moves downward, and contacts with the silicon tetrachloride vapor entering from the lower part of the reactor for 1.5 seconds under the condition of 450 ° C, and then the crude product molecular sieve is moved out of the reactor from the lower part of the reactor by another conveyor. The volume of the reactor is 30cm 3 , The volume of the reactor in this embodiment is about 20 times of the loose bulk volume of the NaY zeolite material entering the reactor during the contact time. The weight ratio of NaY zeolite to silicon tetrachloride in the reactor is 1:0.2. The crude product removed from the reactor was vacuumed and degassed, then washed three times with 6 times of...

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Abstract

The invention provides a modification method of a faujasite molecular sieve, the obtained modified faujasite molecular sieve and application, the method comprises the following steps: the faujasite molecular sieve and gaseous silicon tetrachloride are subjected to a contact reaction, the contact reaction time is not more than 5 seconds, and the modified faujasite molecular sieve is obtained. The space of the contact reaction is more than two times of the bulk volume of the faujasite molecular sieve in the reaction area, and the temperature of the contact reaction is 250-600 DEG C. The relative crystallization retention degree of the obtained modified zeolite molecular sieve is not less than 85%, the unit cell constant is lower than 24.55 angstroms, and a catalytic cracking catalyst prepared from the modified faujasite molecular sieve has high gasoline yield and total light oil yield when used for catalytic cracking of heavy oil.

Description

technical field [0001] The invention provides a method for modifying a faujasite molecular sieve, the obtained modified faujasite molecular sieve and its application, belonging to the technical field of preparation of zeolite molecular sieve catalysts. Background technique [0002] Faujasite is a general term for X-type and Y-type zeolites having a FAU (Framework Type Code) structure. The ratio of silicon to aluminum in the framework of faujasite (refers to SiO 2 and Al 2 o 3 The molar ratio, the same below) greater than 3 is called Y-type zeolite (or called Y-type molecular sieve, or called Y-type zeolite molecular sieve), and Y-type zeolite has important uses in catalyst preparation. For example, the synthesized Y-type zeolite (i.e. NaY zeolite) can be used as the main acidic active component of catalytic cracking catalyst and hydrocracking catalyst after desodiumization and increasing the silicon-aluminum ratio (i.e. reducing the unit cell constant). It plays an impor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08C10G11/05C01B39/24
CPCB01J29/084B01J29/088C10G11/05C01B39/24B01J2229/16B01J2029/081C01P2002/77C01P2002/72C01P2006/10
Inventor 申宝剑高雄厚施巨超聂锁府陈诺赵红娟刘星煜刘宏海刘超伟申宝华
Owner PETROCHINA CO LTD
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