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The preparation method of y-beta composite molecular sieve

A composite molecular sieve block technology, which is applied in the field of preparation of Y-Beta composite molecular sieve, can solve the problem of low cracking activity and achieve the effect of large specific surface area and good cracking effect

Active Publication Date: 2018-09-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the technical problems to be solved by the present invention is to solve the problem that only Y and Beta molecular sieves can be simply mechanically mixed in the industrial hydrocracking catalyst preparation process, and the cracking activity is low, and a new Y-Beta composite molecular sieve is provided

Method used

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  • The preparation method of y-beta composite molecular sieve
  • The preparation method of y-beta composite molecular sieve
  • The preparation method of y-beta composite molecular sieve

Examples

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Embodiment 1

[0028] At 60°C, 20g Y molecular sieve was added to 0.5mol / L NaOH solution and stirred for 1h, then mixed with supplemented silica sol (SiO 2 Content 40%), NaAlO 2 Add them together to the tetraethylammonium hydroxide solution and stir, adjust the pH value of the solution to 11 with NaOH, continue to age and evaporate the solvent, and when the solid content is 25%, the molar composition is obtained as SiO 2 :Al 2 o 3 :TPA + :OH - :H 2 O=1:0.04:0.2:0.1:30, by weight ratio Y: (SiO 2 +Al 2 o 3 ) = 1:1 colloid, put it into a stainless steel kettle for crystallization, the crystallization temperature is 140°C, and the crystallization time is 36 hours. After crystallization, the slurry is cooled, filtered, washed, dried, and roasted at 550°C in an air atmosphere After 4 hours, the Y-Beta composite molecular sieve was obtained. The obtained molecular sieve was ammonium-exchanged and roasted into hydrogen form, and then pressed into tablets and crushed into 40-mesh granules fo...

Embodiment 2

[0030] At 60°C, add 20g Y molecular sieve into 0.8mol / L NaOH solution and stir for 1h, then mix with supplemented silica sol (SiO 2 Content 40%), NaAlO 2 Add them together to the tetraethylammonium hydroxide solution and stir, adjust the pH value of the solution to 11 with NaOH, continue to age and evaporate the solvent, and when the solid content is 25%, the molar composition is obtained as SiO 2 :Al 2 o 3 :TPA + :OH - :H 2 O=1:0.04:0.2:0.1:30, by weight ratio Y: (SiO 2 +Al 2 o 3) = 1:1 colloid, put it into a stainless steel kettle for crystallization, the crystallization temperature is 140°C, and the crystallization time is 36 hours. After crystallization, the slurry is cooled, filtered, washed, dried, and roasted at 550°C in an air atmosphere After 4 hours, the Y-Beta composite molecular sieve was obtained. The obtained molecular sieve was ammonium-exchanged and roasted into hydrogen form, and then pressed into tablets and crushed into 40-mesh granules for probe re...

Embodiment 3

[0032] At 80°C, add 20g Y molecular sieve into 0.5mol / L NaOH solution and stir for 1h, then mix with supplemented silica sol (SiO 2 Content 40%), NaAlO 2 Add them together to the tetraethylammonium hydroxide solution and stir, adjust the pH value of the solution to 11 with NaOH, continue to age and evaporate the solvent, and when the solid content is 25%, the molar composition is obtained as SiO 2 :Al 2 o 3 :TPA + :OH - :H 2 O=1:0.04:0.2:0.1:30, by weight ratio Y: (SiO 2 +Al 2 o 3 ) = 1:1 colloid, put it into a stainless steel kettle for crystallization, the crystallization temperature is 140°C, and the crystallization time is 36 hours. After crystallization, the slurry is cooled, filtered, washed, dried, and roasted at 550°C in an air atmosphere After 4 hours, the Y-Beta composite molecular sieve was obtained. The obtained molecular sieve was ammonium-exchanged and roasted into hydrogen form, and then pressed into tablets and crushed into 40-mesh granules for probe r...

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Abstract

The invention relates to a preparation method of a Y-Beta composite molecular sieve and mainly aims to solve the problems that an industrial hydrocracking catalyst can simply mechanically mix Y and Beta molecular sieves and has low cracking activity. The Y-Beta composite molecular sieve is prepared with a solvent evaporation method, firstly, a Y molecular sieve is subjected to alkali treatment and supplemented with small amounts of silicon source and aluminum source, the Y molecular sieve, the silicon source and the aluminum source are added to a quaternary ammonium salt solution to be stirred, the pH value of the solution is adjusted with alkali, aging is performed continuously for solvent evaporation, when the solid content is 20%-40%, the solution is placed in a stainless steel kettle for crystallization, slurry is subjected to cooling, suction filtration, washing, drying and roasting treatment after crystallization, and the Y-Beta molecular sieve is obtained. The method is convenient to operate and good in repeatability, the prepared Y-Beta molecular sieve is different from a mechanical mixture, has bulk particles, has the characteristics of higher specific surface area and high cracking activity and better solves the problems. The composite molecular sieve can be applied in the hydrocracking field.

Description

technical field [0001] The invention relates to a preparation method of Y-Beta composite molecular sieve. Background technique [0002] As an important inorganic material, microporous molecular sieves have the properties of large specific surface area, high hydrothermal stability, uniform pore size, and adjustable surface properties. They are widely used as catalysts, adsorbents, ion exchangers, and new functional materials. The first industrial application of molecular sieves in the field of catalysis was the application of Y-type zeolite-based catalysts to isomerization reactions by Union Carbide Corporation of the United States in 1959, followed by the application of X-type zeolites in catalytic cracking by American Mobile Corporation in 1962, and the application of Type X zeolites by Grace in 1969 The company has developed an ultra-stable Y-type zeolite (USY) catalyst. [0003] Beta zeolite is an open celled crystalline aluminosilicate. In 1967, it was first synthesize...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/02B01J29/80
CPCB01J29/80B01J2229/22C01B39/023C01P2004/03C01P2006/12
Inventor 李旭光孔德金陈燕周亚新
Owner CHINA PETROLEUM & CHEM CORP
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