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Modified production method of Y-shaped molecular sieve

A production method and molecular sieve technology, applied in octahedral crystalline aluminosilicate zeolite, crystalline aluminosilicate zeolite, etc., to achieve the effects of low sodium oxide content, simple operation process, and low cost

Inactive Publication Date: 2016-06-15
HEZE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Chinese Patent Publication Nos. CN2861917Y, CN101149214A, CN2611844Y, CN202829603U, CN103785436A, CN103787353A, etc. have disclosed the structure and heating method of the roasting kiln used in the Y molecular sieve production process, but the addition of high-temperature steam adopts tail entry , the method of steam outlet at the feed end of the rotary kiln does not change the traditional way of adding high-temperature steam

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) will go through conventional La + The exchanged Y molecular sieve filter cake was flash-dried to obtain a pre-dried molecular sieve dry powder with a moisture content of 10.0%. The Y molecular sieve filter cake after rare earth exchange contained 12.10% of lanthanum oxide and 4.50% of sodium oxide.

[0021] (2) Add the pre-dried Y molecular sieve dry powder evenly into the rotary kiln through the twisted cage feeder, and the water vapor generated is discharged through the exhaust pipe at the discharge end of the rotary kiln. The temperature of the material in the constant temperature section is 600 ° C. The residence time in the constant temperature zone is controlled at 1.5 hours, and the exhaust gas discharge of the rotary kiln is controlled so that the rotary kiln does not leak steam as the standard.

[0022] (3) Pass the calcined Y molecular sieve material through conventional La + Exchange to obtain the finished product of rare earth Y molecular sieve.

Embodiment 2

[0024] The moisture content of the Y-type molecular sieve was adjusted to 20.0% during the pre-drying process, and the finished rare earth Y-type molecular sieve was prepared by the same method as in Example 1.

Embodiment 3

[0026] The moisture content of the Y-type molecular sieve was adjusted to 35.0% during the pre-drying process, and the finished rare earth Y-type molecular sieve was prepared by the same method as in Example 1.

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Abstract

The invention discloses a modified production method of a Y-shaped molecular sieve and belongs to the technical field of inorganic synthesis.An exhaust pipe is moved from a feed end of a rotary kiln to its discharge end, and it is possible to produce the Y-shaped molecular sieve with different lattice cell constant and having the same effect of using high-temperature steam, by using moisture of the Y-shaped molecular sieve that is rare earth exchanged or ammonia exchanged and then pre-dried, and by controlling tail gas emission of the exhaust pipe at the discharge end of the rotary kiln, heating temperature of the rotary kiln and the time of a material retaining in the kiln.High-temperature steam is not introduced herein, the cost is low, operating is simple, and a product has low content of sodium oxide, and the method is worthy of popularization.

Description

technical field [0001] The invention belongs to the technical field of inorganic synthesis, and in particular relates to an improved Y-type molecular sieve production method. Background technique [0002] Fluid catalytic cracking is an important means of secondary processing of crude oil, and catalytic cracking catalyst is one of the core technologies of fluid catalytic cracking. Therefore, the progress on the preparation technology of fluid catalytic cracking catalyst is still an important means for the fluid catalytic cracking process to obtain the maximum benefit. Y-type molecular sieve is the main active component of molecular sieve fluidized catalytic cracking catalyst, and its performance directly affects the reaction performance of catalytic cracking catalyst. In order to improve the use effect of Y-type molecular sieve, according to different needs, different modifications can be made to Y-type molecular sieve to meet the requirements of use. Therefore, the progres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24
CPCC01B39/24
Inventor 于心玉
Owner HEZE UNIV
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