Ammonium fluoroborate modified Y-type molecular sieve and preparation method thereof

A technology of ammonium fluoroborate and molecular sieve, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, crystalline aluminosilicate zeolites, etc. It can solve the problem of weak selective ring-opening ability of polycyclic heavy components and insufficient conversion ability of super large hydrocarbon molecules , unsatisfactory operation effect, etc., to achieve the effect of facilitating diffusion and adsorption, improving acidity and pore structure performance, and smooth pore structure

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Claims
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Problems solved by technology

However, after processing raw oil with high dry point, especially the heavy vacuum wax oil using the vacuum deep drawing separation technology, since the proportion of medium strong acid and B acid in the cracking component in the catalyst is not high, the impact on super large hydrocarbon molecules Insufficient conversion ability, poor selective ring opening ability for polycyclic heavy components, and unsatisfactory actual operation of the device

Method used

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  • Ammonium fluoroborate modified Y-type molecular sieve and preparation method thereof

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preparation example Construction

[0027] The preparation method of modified Y molecular sieve of the present invention specifically comprises the following steps:

[0028] (1) Take an appropriate amount of ammonium fluoroborate crystals, gradually add them into distilled water stirred at a temperature of 30-60°C, filter out impurities in the solution, and prepare a clear, transparent and stable ammonium fluoroborate solution.

[0029] (2) Take an industrially produced low-sodium Y molecular sieve with a sodium oxide content of 0.5~2.0wt%, put it into the ammonium fluoroborate solution under stirring, the solid-liquid ratio is 3:1~10:1, and the temperature of the solution rises to 80~100°C , the ultrasonic instrument can be turned on at the same time, and the mixed slurry is placed under ultrasonic irradiation, the ultrasonic frequency is 40-100kHz, and the power is 2-40W / m according to the volume of the solution. The following dealumination and boron supplementation reactions occur in the slurry system:

[00...

Embodiment 1

[0036] Measure 219.0 g of ammonium fluoroborate and gradually add it into 2000 mL of distilled water under stirring at 50°C to prepare an aqueous solution of ammonium fluoroborate. Get 500g industrial production low-sodium ammonium Y molecular sieve (Na 2 The O content is 1.1%, the crystallinity is 102%, and the unit cell constant is 2.475nm), molecular sieves are gradually added to the stirred ammonium fluoroborate aqueous solution, the temperature of the slurry is raised to 95°C, and the ultrasonic treatment is performed for 60 minutes, and the ultrasonic frequency is 30kHz. The power is 5W / mL according to the volume of the solution; first, the slurry is separated from the solid particles (sodium fluoroaluminate), and then the solid-liquid separation is performed, and the filter cake is dried at 120°C for 6 hours; then the concentration is prepared to be 5% NaOH Mix solution with 12% sodium carbonate, add dispersant sodium tripolyphosphate at the same time, the mass concentr...

Embodiment 2

[0038] Change the low-sodium ammonium Y in Example 1 to SSY molecular sieve, adjust the concentration of ammonium fluoroborate solution to 17.3g / 100mL, ammonium fluoroborate beating solid-to-liquid ratio is 1:6, beating temperature is 70°C, beating time is 3h, lye beating The solid-to-liquid ratio is 1:6, the beating temperature is 70°C, and the beating time is 3 hours. Others are the same as in Example 1, and the code is BNY-2.

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Abstract

The invention discloses a preparation method for a modified Y-type molecular sieve. The preparation method comprises the following steps: preparing an ammonium fluoroborate solution; (2) putting an industrially produced Y molecular sieve in the ammonium fluoroborate solution in the step (1), carrying out an aluminization removal and boron supplement reaction in the slurry system: NH4BF4+Al<3+>+Na<+>=NaAlF4 (a large-particle precipitate)+B<3+>+NH4<+>, and carrying out solid-liquid separation and drying after the reaction; (3) adding the molecular sieve dried in the step (2) into an alkaline solution to be pulped, and separating, washing and drying after the pulping to prepare the modified Y-type molecular sieve. The invention provides a modification method for carrying out aluminization removal and boron supplement on the Y-type molecular sieve by a combination of a boron-containing compound and the alkaline solution, so that a boron-containing modified Y-type molecular sieve which is medium / high in strong acid content is prepared.

Description

technical field [0001] The invention relates to a Y-type molecular sieve and a preparation method thereof, in particular to a method of combining a boron-containing compound and an alkali solution to dealuminate a Y-type molecular sieve and perform boron supplementation and dealumination treatment, which can be used as an active group of a heavy oil macromolecular hydrocarbon conversion catalyst point. Background technique [0002] Hydrocracking technology has the characteristics of strong adaptability to raw materials, great flexibility in production operations and product plans, and good product quality. It can directly convert various heavy and low-quality feedstocks into high-quality jet fuel, diesel, and lubricating oil base materials that are urgently needed by the market. As well as chemical naphtha and tail oil steam cracking raw materials for ethylene production, it has become one of the most important heavy oil deep processing processes in modern oil refining and p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/24B01J29/86B01J29/08
Inventor 张晓萍杜艳泽关明华刘昶
Owner CHINA PETROLEUM & CHEM CORP
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