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Boron modified Y-type molecular sieve and preparation method thereof

A molecular sieve and modification technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc. Unsatisfactory effect and other problems, to achieve the effect of improving acidity and pore structure performance, increasing proportion, and strengthening acidity

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Boron modified Y-type molecular sieve and preparation method thereof

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Effect test

preparation example Construction

[0026] The preparation method of modified Y molecular sieve of the present invention specifically comprises the following steps:

[0027] (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.

[0028] (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 , you can turn on the ultrasonic instrument, place the mixed slurry 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:

[0029] NH 4 BF 4 +Al 3+ +N...

Embodiment 1

[0035] 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 increased to 95°C, and the treatment is 60 minutes; first, the slurry is mixed with solid particles (fluoroaluminum Sodium acid) separation, and then solid-liquid separation, the filter cake was dried at 120 ° C for 6 hours; take the above 500g molecular sieve, and 200mL organic silicone oil ethanol solution (concentration 18.4gSiO 2 / 100mL) evenly sprayed onto the molecular sieve. Dry the impregnated molecular sieve at a temperature of 80°C for 3 hours; carry out a hydrothermal treatment of the molecular sieve co...

Embodiment 2

[0037] Change the low-sodium ammonium Y in Example 1 to SSY molecular sieve, adjust the concentration of ammonium fluoroborate solution to 15.2g / 100mL, make the beating solid-liquid ratio 1:5, beating temperature 70°C, beating time 2h, organic silicon into silicon oxide Alkane, other with example 1, numbering is BCY-2.

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Abstract

The invention discloses a method for preparing a modified Y-type molecular sieve. The method comprises the following steps: (1) preparing an ammonium fluoroborate solution; (2) placing an industrially produced Y-type molecular sieve into the ammonium fluoroborate solution in the step (1), performing a following dealuminzation boron-supplementing reaction in a slurry system, NH4BF4+Al<3+>+Na<+>=NaAlF4(large particle precipitate) +B<3+>+NH4<+>, and carrying out solid-liquid separation and drying after the reaction is ended; (3) spraying and leaching the ethanol solution of a macromolecular organosilicon compound in the materials dried in the step (2), drying and carrying out hydro-thermal treatment to prepare the modified Y-type molecular sieve. According to the method, a boron-containing compound and the organosilicon compound are adopted to modify the Y-type molecular sieve to prepare a boron-containing modified Y-type molecular sieve containing high and medium strong acid.

Description

technical field [0001] The invention relates to a modified Y-type molecular sieve and a preparation method thereof, in particular to a method for modifying a Y-type molecular sieve by using a boron-containing compound and an organosilicon compound to prepare a modified Y-type molecular sieve with a high silicon-aluminum ratio and a boron-containing skeleton. type molecular sieve. 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 petrochemical industries...

Claims

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Application Information

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IPC IPC(8): B01J29/08
Inventor 王凤来杜艳泽关明华刘昶
Owner CHINA PETROLEUM & CHEM CORP
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