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Preparation method for sulfur-free or ultralow-sulfur-content Y molecular sieve

A molecular sieve and ultra-low sulfur technology, applied in octahedral crystalline aluminosilicate zeolite, crystalline aluminosilicate zeolite, etc.

Active Publication Date: 2016-10-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the system contains a small amount of sulfate radicals, it will eventually cause some sulfate radicals to be contained in the product, and its S content is about 200ppm (see comparative example)

Method used

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  • Preparation method for sulfur-free or ultralow-sulfur-content Y molecular sieve
  • Preparation method for sulfur-free or ultralow-sulfur-content Y molecular sieve
  • Preparation method for sulfur-free or ultralow-sulfur-content Y molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 0.0023g of barium nitrate to a mixed solution of 6.72g of sodium metaaluminate, 5.81g of sodium hydroxide and 10.8g of pure water, shake for 10min, take 19.44g of the supernatant, and record it as A. Add 27.52g of water glass into a mixed solution of 0.0033g of barium nitrate and 5.83g of water, shake for 10min, take 27.78g of the supernatant, stir, add the mixed solution A, stir for 1h, seal it, and age it at room temperature for 24h to obtain a directing agent .

[0032]Next, add 0.0031g of barium nitrate to the mixed solution of 18g of pure water and 13.44g of sodium metaaluminate, shake for 10min, take 26.2g of the supernatant, and record it as B. Add 0.0070 g of barium nitrate and 15.38 g of water to 55.01 g of water glass, take 58.66 g of supernatant, stir, add mixed solution B, and stir for 1 hour to obtain colloid C. Then, 4.9666g of directing agent was added to the stirred C, stirred for 20min, sealed, aged at room temperature for 1h, and crystallized at 9...

Embodiment 2

[0035] Add 0.023g of barium nitrate to a mixed solution of 6.72g of sodium metaaluminate, 5.81g of sodium hydroxide, and 10.8g of pure water, shake for 10 minutes, take 19.44g of supernatant, and record it as A. Add 27.52g of water glass into a mixed solution of 0.033g of barium nitrate and 5.83g of water, shake for 10min, take 27.78g of the supernatant, stir, add the mixed solution A, stir for 1h, seal it, and age it at room temperature for 24h to obtain a directing agent .

[0036] Next, add 0.031g of barium nitrate into the mixed solution of 18g of pure water and 13.44g of sodium metaaluminate, shake for 10min, take 26.2g of supernatant, and record it as B. Add 0.070 g of barium nitrate and 15.38 g of water to 55.01 g of water glass, take 58.66 g of supernatant, stir, add mixed solution B, and stir for 1 hour to obtain colloid C. Then, 4.9666g of directing agent was added to the stirred C, stirred for 20min, sealed, aged at room temperature for 1h, and crystallized at 95°C...

Embodiment 3

[0039] Add 0.23g of barium nitrate to a mixed solution of 6.72g of sodium metaaluminate, 5.81g of sodium hydroxide, and 10.8g of pure water, shake for 10min, take 19.44g of supernatant, and record it as A. Add 27.52g of water glass into a mixed solution of 0.33g of barium nitrate and 5.83g of water, shake for 10min, take 27.78g of the supernatant, stir, add the mixed solution A, stir for 1h, seal it, and age it at room temperature for 24h to obtain a directing agent .

[0040] Next, add 0.31g of barium nitrate to the mixed solution of 18g of pure water and 13.44g of sodium metaaluminate, shake for 10min, take 26.2g of supernatant, and record it as B. Add 0.70 g of barium nitrate and 15.38 g of water to 55.01 g of water glass, take 58.66 g of supernatant, stir, add mixed solution B, and stir for 1 hour to obtain colloid C. Then, 4.9666g of directing agent was added to the stirred C, stirred for 20min, sealed, aged at room temperature for 1h, and crystallized at 95°C for 24h. ...

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Abstract

The invention provides a preparation method for a sulfur-free or ultralow-sulfur-content Y molecular sieve. A conventional preparation scheme for a NaY molecular sieve is employed; and raw materials consisting of soluble glass, sodium metaaluminate, a NaOH solution and deionized water are mixed to form glue and then a hydrothermal reaction is carried out so as to prepare the sulfur-free or ultralow-sulfur-content Y molecular sieve. The preparation method is characterized in that a certain amount of soluble barium salt is added before usage of the raw materials, full stirring and standing are successively carried out, and then supernatant liquid is taken as a raw material for preparation of the Y molecular sieve; and a certain amount of soluble barium salt is added into solutions used in subsequent exchanging and washing, and only supernatant liquid is taken for usage.

Description

technical field [0001] The invention belongs to the technical field of preparation of petrochemical catalytic materials, in particular to a preparation method of a sulfur-free or ultra-low sulfur content Y molecular sieve. Background technique [0002] Y molecular sieve is a three-dimensional macroporous molecular sieve with a twelve-membered ring, and the framework type is FAU. At present, Y molecular sieve and its derivatives are widely used in the field of petrochemical industry, especially in the field of catalytic cracking and hydrocracking, as an important part of catalyst or catalyst carrier. At present, with the trend of crude oil becoming inferior and heavy, more and more researches are on the preparation of mesoporous Y, micro-mesoporous composite Y molecular sieves, or small-grain nano-Y molecular sieves to improve the diffusion efficiency of macromolecules, such as US Patents USP3449370, USP4701313, USP37755538, CN102616807A, etc. [0003] However, with the eff...

Claims

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Application Information

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IPC IPC(8): C01B39/24
Inventor 李兆飞郭成玉邢昕王骞刘其武阎立军庞新梅李发永
Owner PETROCHINA CO LTD