Preparation of composite double microporous material

A technology of microporous materials and composite molecular sieves, which is applied in the field of preparation of double microporous molecular sieves, can solve the problems of poor catalyst reactivity, no significant improvement in medium oil selectivity, and no significant improvement in catalyst activity, etc.

Active Publication Date: 2009-03-04
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from the perspective of the use effect, the reactivity of this type of catalyst is still poor (greater than 392 ° C), and the selectivity of medium oil has not been significantly improved.
[0006] CN 1488726A (mesoporous molecular sieve and Y-type molecular sieve) and CN1667093A (Y-type molecular sieve and SAPO molecular sieve) etc. have disclosed the technology that contains mechanical mixing molecular sieve as hydrocracking catalyst component, but in the scheme that they relate to, mainly aim at processing For distillate oils with high impurities such as sulfur and nitrogen, the catalyst activity has not been significantly improved

Method used

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  • Preparation of composite double microporous material
  • Preparation of composite double microporous material
  • Preparation of composite double microporous material

Examples

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preparation example Construction

[0024] (2) The preparation of silica-alumina gel can specifically take the following method: silicon source, aluminum source, sodium hydroxide, templating agent and water are mixed according to (5-35) SiO 2 :Al 2 o 3 : (3 ~ 12) R2: (1 ~ 4) Na 2 O: (100~800)H 2 The molar ratio of O is mixed at room temperature and under mechanical stirring conditions, and the stirring is continued until the raw materials are evenly mixed to obtain a silica-alumina gel; the silicon source is white carbon black, water glass or silica sol; the aluminum source is sodium aluminate or aluminum hydroxide, preferably sodium aluminate. Said templating agent R2 is tetraethylammonium bromide or tetraethylammonium hydroxide or a mixture of both.

[0025](3) Add the directing agent prepared in step (1) to the silica-alumina gel prepared in step (2), the amount of the directing agent accounts for 5v% to 20v% of the volume of the silica-alumina gel, and the reaction gel is obtained after stirring evenly. ...

Embodiment 1

[0030] (1) Preparation of guiding agent: Weigh 4.1 g of sodium hydroxide, 3.5 g of tetramethylammonium bromide and 2.1 g of sodium aluminate, dissolve in 20 ml of distilled water, and mix evenly with electromagnetic stirring. Mix the above solution with 23.5ml water glass (SiO 2 concentration of 8 mol / L), mixed with magnetic force for 0.5 hours, put into a Erlenmeyer flask, sealed and aged at 35°C for 72 hours to prepare the directing agent.

[0031] (2) The preparation of silica-alumina gel can specifically take the following method: 30g white carbon black, 7.3ml sodium aluminate solution (Al 2 o 3 Concentration is 3.4mol / L), 4g sodium hydroxide, 35g tetraethylammonium bromide and 80ml water are mixed under room temperature and mechanical stirring condition, continue to stir for 0.5 hour, obtain silica-alumina gel.

[0032] (3) Add 13.5ml of directing agent to the silica-alumina gel prepared in step (2), stir evenly to obtain a reaction gel, then add 12g NaY molecular sieve...

Embodiment 2

[0036] (1) Preparation of guiding agent: Weigh 4.1 g of sodium hydroxide, 3 g of tetramethylammonium bromide and 2.1 g of sodium aluminate, dissolve in 20 ml of distilled water, and mix well with electromagnetic stirring. Mix the above solution with 22.7ml water glass (SiO 2 concentration of 8 mol / L), mixed with magnetic force for 0.5 hours, put into a Erlenmeyer flask, sealed and aged at 35°C for 72 hours to prepare the directing agent.

[0037] (2) The preparation of silica-alumina gel can specifically take the following method: 30g white carbon black, 7.3ml sodium aluminate solution (Al 2 o 3 Concentration is 3.4mol / L), 4g sodium hydroxide, 31g tetraethylammonium bromide and 80ml water are mixed under room temperature and mechanical stirring condition, continue to stir for 0.5 hour, obtain silica-alumina gel.

[0038] (3) Add 13.5ml of directing agent to the silica-alumina gel prepared in step (2), stir evenly to obtain a reaction gel, then add 15g of NaY molecular sieve ...

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Abstract

The invention discloses composite dual-microporous material and a preparation method. A guiding agent gel of a Y molecular-sieve is confected first, and then a silica-alumina gel is confected; the guiding agent gel is added in the silica-alumina gel and mixed evenly, and a molecular-sieve seed crystal is added finally; the mixed materials are processed through crystallization for a period of time at low temperature and then are processed through crystallization for a period of time at high temperature after the temperature is raised, and a Y/Beta composite molecular-sieve is obtained through cooling and separation finally. The composite molecular-sieve which is prepared by adopting the preparation method has the high composite advantage of the two types of molecular-sieves, can remarkably increase the medium oil selectivity of the hydrocracking reaction, and can reduce the reaction temperature.

Description

technical field [0001] The invention relates to a preparation method of a compound double microporous material, in particular to a preparation method of a double microporous molecular sieve which is highly compounded with a Y-type molecular sieve and a beta molecular sieve. Background technique [0002] Hydrocracking technology is one of the main means of lightening heavy oil, and chemical raw materials, light fuel oil and middle distillates are the main target products of this technology. At present, with the acceleration of upgrading of petrochemical products, stricter environmental protection regulations, and increasing demand for chemical raw materials, the status of hydrocracking technology in the entire petroleum refining industry has been further improved. [0003] In many refining and processing processes, developing the most suitable catalyst is considered to be one of the most critical and ideal choices, and the same is true for hydrocracking. Catalyst activity is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/04B01J29/06C01B39/24
Inventor 张志智凌凤香孙万付张喜文李瑞丰马静红
Owner CHINA PETROLEUM & CHEM CORP
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