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Preparation method of H beta/HMCM-49 compound molecular sieve

A technology of composite molecular sieve and β molecular sieve, which is applied in the field of preparation of Hβ/HMCM-49 composite molecular sieve, can solve the problems not related to the preparation method of Hβ-HMCM-49 composite molecular sieve, and achieve large average pore size, strong total acidity, and through-hole many effects

Active Publication Date: 2012-05-23
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Neither of these two patents involves the preparation method of Hβ-HMCM-49 composite molecular sieve

Method used

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  • Preparation method of H beta/HMCM-49 compound molecular sieve
  • Preparation method of H beta/HMCM-49 compound molecular sieve
  • Preparation method of H beta/HMCM-49 compound molecular sieve

Examples

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Embodiment 1

[0024] Slurry preparation of Naβ molecular sieve: Add 350ml of distilled water into the gelling kettle, add 32g of sodium metaaluminate, 1.1g of sodium hydroxide, and 2g of potassium hydroxide, and dissolve them completely under stirring to make potassium and sodium metaaluminate aqueous solution. Weigh 170g of tetraethylammonium bromide, add 100ml of water and 200ml of 17% ammonia water, stir to make it completely dissolve, and make a quaternary ammonium salt solution, and add the quaternary ammonium salt solution and potassium metaaluminate sodium alkali solution to the gelling kettle Add 700g of 30% silica sol slowly, then add 2.5g of Naβ molecular sieve raw powder, and gel for 2 hours; then add it to a 1L crystallization kettle, and crystallize at 150°C and 60 rpm 110h, the obtained Naβ molecular sieve slurry.

[0025] Preparation of NaMCM-49 molecular sieve slurry; add 540ml of distilled water to the gelling kettle, add 29g of sodium metaaluminate, and dissolve it comple...

Embodiment 2

[0029] Preparation of Naβ molecular sieve slurry: Add 300ml of distilled water into the gelling kettle, add 30g of sodium metaaluminate, 1.1g of sodium hydroxide, and 0.5g of potassium hydroxide, and dissolve them completely under stirring to make potassium sodium metaaluminate alkaline aqueous solution. Weigh 150g of tetraethylammonium bromide, add 100ml of water and 150ml of 17% ammonia water, stir to make it completely dissolve, and make a quaternary ammonium salt solution, and add the quaternary ammonium salt solution and potassium metaaluminate sodium alkali solution to the gelling kettle and mix evenly; slowly add 700g of 30% silica sol, then add 3.0g of Naβ molecular sieve raw powder, and gel for 2.0h; then add it into a 1L crystallization kettle, and crystallize After 110 h, the slurry of Naβ molecular sieve obtained.

[0030] Preparation of NaMCM-49 molecular sieve slurry; add 540ml of distilled water into the gelling kettle, add 28.6g of sodium metaaluminate, and di...

Embodiment 3

[0037] Slurry preparation of Naβ molecular sieve: Add 310ml of distilled water, 30g of sodium metaaluminate, 1.1g of sodium hydroxide, and 0.5g of potassium hydroxide into the gelling kettle, dissolve them completely under stirring, and make potassium sodium metaaluminate base aqueous solution. Weigh 165g of tetraethylammonium bromide, add 100ml of water and 190ml of 17% ammonia water, stir to make it dissolve completely, and make an aqueous solution of quaternary ammonium salt, add this aqueous solution of quaternary ammonium salt and potassium metaaluminate sodium alkali solution to the Add 690g of 30% silica sol slowly, then add 2.5g of Naβ molecular sieve raw powder, and gel for 2.5h; then crystallize for 115h at 152°C and 70 rpm to obtain Naβ molecular sieve of slurry.

[0038] Preparation of NaMCM-49 molecular sieve slurry; add 540ml of distilled water into the gelling kettle, add 28.6g of sodium metaaluminate, and dissolve it completely under stirring; add 120ml of hex...

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Abstract

The invention relates to a preparation method of an H beta / HMCM-49 compound molecular sieve, which comprises the steps of: mixing and dissolving sodium aluminate, sodium hydroxide and potassium hydroxide into distilled water; dissolving tetraethylammonium bromide and ammonia water to prepare hexamethonium ammonia water; at normal temperature, reacting sodium and potassium meta-aluminate alkali liquor and the hexamethonium ammonia water with silicon sol, adding Na beta molecular sieve raw powder for crystallizing; dissolving the sodium aluminate into the distilled water, adding hexamethyleneimine; at normal temperature, dropping the silicon sol; adding NaMCM-49 molecular sieve compound molecular sieve raw powder, mixing and introducing O3 or H2O2 for oxidizing to prepare modified H beta / HMCM-49 compound molecular sieve raw powder; exchanging with an ammonium nitrate solution to prepare H beta / HMCM-49 compound molecular sieve raw powder. A compound molecular sieve has efficacy of an MCM-49 molecular sieve and a beta molecular sieve, and has the characteristics of uniform mixing, large average pore diameter, many through holes and strong total acidity.

Description

Technical field: [0001] The invention relates to a preparation method of Hβ / HMCM-49 composite molecular sieve. Background technique [0002] Industrially, most of the production methods of cumene are alkylation and anti-alkylation recycling methods, and the performance of the catalyst for alkylation and anti-alkylation determines the level of synthesis technology. Anti-alkylation is the reaction of diisopropylbenzene, triisopropylbenzene and other polyisopropylbenzenes with benzene, which is carried out under the action of anti-alkylation catalysts. Due to the different types of alkylation catalysts, the composition of raw materials for anti-alkylation is different. Catalysts are different, and the disclosed anti-alkylation catalysts include BETA, Y, ZSM-5, MOR pumice, MCM-22, MCM-49 and phosphoric acid modified, rare earth modified, dealuminated modified molecular sieves. They are single molecular sieves or modified single molecular sieves. A single molecular sieve or a m...

Claims

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Application Information

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IPC IPC(8): C01B39/04
Inventor 邓广金张钰赵胤董肇勇李正焦立平牛志蒙焦凤茹崔龙
Owner PETROCHINA CO LTD
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